import { useState, useCallback, useEffect, useId, useMemo, useRef, memo, type ReactElement } from "react";
import type { UseMutationResult } from "@tanstack/react-query";
import { useRouter } from "expo-router";
import {
  View,
  Text,
  ActivityIndicator,
  Pressable,
  SectionList,
  Platform,
  type NativeSyntheticEvent,
  type NativeScrollEvent,
  type SectionListRenderItem,
} from "react-native";
import { ScrollView, type ScrollView as ScrollViewType } from "react-native-gesture-handler";
import { StyleSheet, useUnistyles } from "react-native-unistyles";
import AsyncStorage from "@react-native-async-storage/async-storage";
import * as Linking from "expo-linking";
import { Archive, ChevronDown, ChevronRight, GitBranch, MoreVertical, ArrowLeftRight, ListChevronsDownUp, ListChevronsUpDown } from "lucide-react-native";
import { useMutation, useQueryClient } from "@tanstack/react-query";
import { useSessionStore } from "@/stores/session-store";
import {
  useCheckoutDiffQuery,
  type ParsedDiffFile,
  type DiffLine,
  type HighlightToken,
} from "@/hooks/use-checkout-diff-query";
import { useCheckoutStatusQuery } from "@/hooks/use-checkout-status-query";
import { useCheckoutPrStatusQuery } from "@/hooks/use-checkout-pr-status-query";
import { useHorizontalScrollOptional } from "@/contexts/horizontal-scroll-context";
import { useExplorerSidebarAnimation } from "@/contexts/explorer-sidebar-animation-context";
import { Fonts } from "@/constants/theme";
import { getNowMs, isPerfLoggingEnabled, perfLog } from "@/utils/perf";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuTrigger,
  type ActionStatus,
} from "@/components/ui/dropdown-menu";

// =============================================================================
// Action Status Hook
// =============================================================================
// Tracks mutation state with a brief success phase before returning to idle.
// State flow: idle → pending → success (1s) → idle
// =============================================================================

const SUCCESS_DISPLAY_MS = 1000;

type ActionState = {
  status: ActionStatus;
  trigger: () => void;
};

// =============================================================================
// Git Actions Data Structure
// =============================================================================

type GitActionId =
  | "commit"
  | "push"
  | "view-pr"
  | "create-pr"
  | "merge-branch"
  | "merge-from-base"
  | "archive-worktree";

interface GitAction {
  id: GitActionId;
  label: string;
  pendingLabel: string;
  successLabel: string;
  disabled: boolean;
  status: ActionStatus;
  description?: string;
  icon?: ReactElement;
  handler: () => void;
}

interface GitActions {
  primary: GitAction | null;
  secondary: GitAction[];
  menu: GitAction[];
}

function useActionStatus<TData, TError, TVariables, TContext>(
  mutation: UseMutationResult<TData, TError, TVariables, TContext>,
  onTrigger?: () => void
): ActionState {
  const [showSuccess, setShowSuccess] = useState(false);
  const successTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);

  // Clear timeout on unmount
  useEffect(() => {
    return () => {
      if (successTimeoutRef.current) {
        clearTimeout(successTimeoutRef.current);
      }
    };
  }, []);

  // Watch for mutation success to trigger success display
  useEffect(() => {
    if (mutation.isSuccess && !mutation.isPending) {
      setShowSuccess(true);
      successTimeoutRef.current = setTimeout(() => {
        setShowSuccess(false);
        mutation.reset();
      }, SUCCESS_DISPLAY_MS);
    }
  }, [mutation.isSuccess, mutation.isPending, mutation]);

  const status: ActionStatus = mutation.isPending
    ? "pending"
    : showSuccess
      ? "success"
      : "idle";

  const trigger = useCallback(() => {
    onTrigger?.();
    mutation.mutate(undefined as TVariables);
  }, [mutation, onTrigger]);

  return { status, trigger };
}

function openURLInNewTab(url: string): void {
  if (Platform.OS === "web") {
    window.open(url, "_blank", "noopener");
  } else {
    void Linking.openURL(url);
  }
}

const DIFF_PANE_LOG_TAG = "[GitDiffPane]";
const DIFF_FILE_LOG_TAG = "[DiffFileSection]";
const DIFF_FILE_LOG_LINE_THRESHOLD = 500;
const DIFF_FILE_LOG_TOKEN_THRESHOLD = 5000;

type HighlightStyle = NonNullable<HighlightToken["style"]>;

interface HighlightedTextProps {
  tokens: HighlightToken[];
  baseStyle: HighlightStyle | null;
  lineType: "add" | "remove" | "context" | "header";
}

// GitHub syntax highlight colors for dark/light modes
const darkHighlightColors: Record<HighlightStyle, string> = {
  keyword: "#ff7b72",
  comment: "#8b949e",
  string: "#a5d6ff",
  number: "#79c0ff",
  literal: "#79c0ff",
  function: "#d2a8ff",
  definition: "#d2a8ff",
  class: "#ffa657",
  type: "#ff7b72",
  tag: "#7ee787",
  attribute: "#79c0ff",
  property: "#79c0ff",
  variable: "#c9d1d9",
  operator: "#79c0ff",
  punctuation: "#c9d1d9",
  regexp: "#a5d6ff",
  escape: "#79c0ff",
  meta: "#8b949e",
  heading: "#79c0ff",
  link: "#a5d6ff",
};

const lightHighlightColors: Record<HighlightStyle, string> = {
  keyword: "#cf222e",
  comment: "#6e7781",
  string: "#0a3069",
  number: "#0550ae",
  literal: "#0550ae",
  function: "#8250df",
  definition: "#8250df",
  class: "#953800",
  type: "#cf222e",
  tag: "#116329",
  attribute: "#0550ae",
  property: "#0550ae",
  variable: "#24292f",
  operator: "#0550ae",
  punctuation: "#24292f",
  regexp: "#0a3069",
  escape: "#0550ae",
  meta: "#6e7781",
  heading: "#0550ae",
  link: "#0a3069",
};

function HighlightedText({ tokens, lineType }: HighlightedTextProps) {
  const { theme } = useUnistyles();
  const isDark = theme.colors.surface0 === "#18181c";

  // Get color for a highlight style
  const getTokenColor = (style: HighlightStyle | null): string => {
    const baseColor = isDark ? "#c9d1d9" : "#24292f";
    if (!style) return baseColor;
    const colors = isDark ? darkHighlightColors : lightHighlightColors;
    return colors[style] ?? baseColor;
  };

  return (
    <Text style={styles.diffLineText}>
      {tokens.map((token, index) => (
        <Text key={index} style={{ color: getTokenColor(token.style) }}>
          {token.text}
        </Text>
      ))}
    </Text>
  );
}


interface DiffFileSectionProps {
  file: ParsedDiffFile;
  isExpanded: boolean;
  onToggle: (path: string) => void;
  testID?: string;
}

function DiffLineView({ line }: { line: DiffLine }) {
  return (
    <View
      style={[
        styles.diffLineContainer,
        line.type === "add" && styles.addLineContainer,
        line.type === "remove" && styles.removeLineContainer,
        line.type === "header" && styles.headerLineContainer,
        line.type === "context" && styles.contextLineContainer,
      ]}
    >
      {line.tokens && line.type !== "header" ? (
        <HighlightedText
          tokens={line.tokens}
          baseStyle={null}
          lineType={line.type}
        />
      ) : (
        <Text
          style={[
            styles.diffLineText,
            line.type === "add" && styles.addLineText,
            line.type === "remove" && styles.removeLineText,
            line.type === "header" && styles.headerLineText,
            line.type === "context" && styles.contextLineText,
          ]}
        >
          {line.content || " "}
        </Text>
      )}
    </View>
  );
}

const DiffFileHeader = memo(function DiffFileHeader({
  file,
  isExpanded,
  onToggle,
  testID,
}: DiffFileSectionProps) {
  const { theme } = useUnistyles();
  const expandStartRef = useRef<number | null>(null);

  const { hunkCount, lineCount, tokenCount } = useMemo(() => {
    let totalLines = 0;
    let totalTokens = 0;
    for (const hunk of file.hunks) {
      totalLines += hunk.lines.length;
      for (const line of hunk.lines) {
        if (line.tokens) {
          totalTokens += line.tokens.length;
        }
      }
    }
    return {
      hunkCount: file.hunks.length,
      lineCount: totalLines,
      tokenCount: totalTokens,
    };
  }, [file]);

  const shouldLogFileMetrics =
    lineCount >= DIFF_FILE_LOG_LINE_THRESHOLD ||
    tokenCount >= DIFF_FILE_LOG_TOKEN_THRESHOLD;

  const toggleExpanded = useCallback(() => {
    if (isPerfLoggingEnabled() && shouldLogFileMetrics) {
      expandStartRef.current = getNowMs();
      perfLog(DIFF_FILE_LOG_TAG, {
        event: "toggle",
        path: file.path,
        nextExpanded: !isExpanded,
        hunkCount,
        lineCount,
        tokenCount,
      });
    }
    onToggle(file.path);
  }, [file.path, onToggle, isExpanded, hunkCount, lineCount, tokenCount, shouldLogFileMetrics]);

  useEffect(() => {
    if (!isPerfLoggingEnabled() || !shouldLogFileMetrics) {
      return;
    }
    const startMs = expandStartRef.current;
    if (startMs === null) {
      return;
    }
    expandStartRef.current = null;
    const logCommit = () => {
      const durationMs = getNowMs() - startMs;
      perfLog(DIFF_FILE_LOG_TAG, {
        event: isExpanded ? "expand_commit" : "collapse_commit",
        path: file.path,
        durationMs: Math.round(durationMs),
        hunkCount,
        lineCount,
        tokenCount,
      });
    };
    if (typeof requestAnimationFrame === "function") {
      requestAnimationFrame(() => logCommit());
    } else {
      logCommit();
    }
  }, [isExpanded, file.path, hunkCount, lineCount, tokenCount, shouldLogFileMetrics]);

  return (
    <View
      style={[
        styles.fileSectionHeaderContainer,
        !isExpanded && styles.fileSectionBorder,
      ]}
      testID={testID}
    >
      <Pressable
        testID={testID ? `${testID}-toggle` : undefined}
        style={({ pressed }) => [
          styles.fileHeader,
          pressed && styles.fileHeaderPressed,
        ]}
        onPress={toggleExpanded}
      >
        <View style={styles.fileHeaderLeft}>
          <View
            style={[
              styles.chevronContainer,
              isExpanded && styles.chevronExpanded,
            ]}
          >
            <ChevronRight
              size={16}
              color={theme.colors.foregroundMuted}
            />
          </View>
          <Text style={styles.fileName}>{file.path.split("/").pop()}</Text>
          <Text style={styles.fileDir} numberOfLines={1}>
            {file.path.includes("/")
              ? ` ${file.path.slice(0, file.path.lastIndexOf("/"))}`
              : ""}
          </Text>
          {file.isNew && (
            <View style={styles.newBadge}>
              <Text style={styles.newBadgeText}>New</Text>
            </View>
          )}
          {file.isDeleted && (
            <View style={styles.deletedBadge}>
              <Text style={styles.deletedBadgeText}>Deleted</Text>
            </View>
          )}
        </View>
        <View style={styles.fileHeaderRight}>
          <Text style={styles.additions}>+{file.additions}</Text>
          <Text style={styles.deletions}>-{file.deletions}</Text>
        </View>
      </Pressable>
    </View>
  );
});

function DiffFileBody({ file, testID }: { file: ParsedDiffFile; testID?: string }) {
  const [scrollViewWidth, setScrollViewWidth] = useState(0);
  const [isAtLeftEdge, setIsAtLeftEdge] = useState(true);
  const horizontalScroll = useHorizontalScrollOptional();
  const scrollId = useId();
  const scrollViewRef = useRef<ScrollViewType>(null);

  // Get the close gesture ref from animation context (may not be available outside sidebar)
  let closeGestureRef: React.MutableRefObject<any> | undefined;
  try {
    const animation = useExplorerSidebarAnimation();
    closeGestureRef = animation.closeGestureRef;
  } catch {
    // Not inside ExplorerSidebarAnimationProvider, which is fine
  }

  // Register/unregister scroll offset tracking
  useEffect(() => {
    if (!horizontalScroll) return;
    // Start at 0 (not scrolled)
    horizontalScroll.registerScrollOffset(scrollId, 0);
    return () => {
      horizontalScroll.unregisterScrollOffset(scrollId);
    };
  }, [horizontalScroll, scrollId]);

  const handleScroll = useCallback(
    (event: NativeSyntheticEvent<NativeScrollEvent>) => {
      const offsetX = event.nativeEvent.contentOffset.x;
      // Track if we're at the left edge (with small threshold for float precision)
      setIsAtLeftEdge(offsetX <= 1);
      if (horizontalScroll) {
        horizontalScroll.registerScrollOffset(scrollId, offsetX);
      }
    },
    [horizontalScroll, scrollId]
  );

  return (
    <View style={[styles.fileSectionBodyContainer, styles.fileSectionBorder]} testID={testID}>
      {file.status === "too_large" || file.status === "binary" ? (
        <View style={styles.statusMessageContainer}>
          <Text style={styles.statusMessageText}>
            {file.status === "binary" ? "Binary file" : "Diff too large to display"}
          </Text>
        </View>
      ) : (
        <ScrollView
          ref={scrollViewRef}
          horizontal
          nestedScrollEnabled
          showsHorizontalScrollIndicator
          bounces={false}
          style={styles.diffContent}
          contentContainerStyle={styles.diffContentInner}
          onScroll={handleScroll}
          scrollEventThrottle={16}
          onLayout={(e) => setScrollViewWidth(e.nativeEvent.layout.width)}
          // When at left edge, wait for close gesture to fail before scrolling.
          // The close gesture fails quickly on leftward swipes (failOffsetX=-10),
          // so scrolling left works normally. On rightward swipes, close gesture
          // activates and closes the sidebar.
          waitFor={isAtLeftEdge && closeGestureRef?.current ? closeGestureRef : undefined}
        >
          <View style={[styles.linesContainer, scrollViewWidth > 0 && { minWidth: scrollViewWidth }]}>
            {file.hunks.map((hunk, hunkIndex) =>
              hunk.lines.map((line, lineIndex) => (
                <DiffLineView key={`${hunkIndex}-${lineIndex}`} line={line} />
              ))
            )}
          </View>
        </ScrollView>
      )}
    </View>
  );
}

interface GitDiffPaneProps {
  serverId: string;
  agentId: string;
  cwd: string;
}

type GitDiffSection = {
  key: string;
  index: number;
  file: ParsedDiffFile;
  isExpanded: boolean;
  data: ParsedDiffFile[];
};

export function GitDiffPane({ serverId, agentId, cwd }: GitDiffPaneProps) {
  const { theme } = useUnistyles();
  const router = useRouter();
  const queryClient = useQueryClient();
  const client = useSessionStore(
    (state) => state.sessions[serverId]?.client ?? null
  );
  const [diffModeOverride, setDiffModeOverride] = useState<"uncommitted" | "base" | null>(null);
  const [actionError, setActionError] = useState<string | null>(null);
  const [shipDefault, setShipDefault] = useState<"merge" | "pr">("merge");
  const { status, isLoading: isStatusLoading, isFetching: isStatusFetching, isError: isStatusError, error: statusError, refresh: refreshStatus } =
    useCheckoutStatusQuery({ serverId, cwd });
  const gitStatus = status && status.isGit ? status : null;
  const isGit = Boolean(gitStatus);
  const notGit = status !== null && !status.isGit && !status.error;
  const statusErrorMessage =
    status?.error?.message ??
    (isStatusError && statusError instanceof Error ? statusError.message : null);
  const baseRef = gitStatus?.baseRef ?? undefined;

  // Auto-select diff mode based on state: uncommitted when dirty, base when clean
  const hasUncommittedChanges = Boolean(gitStatus?.isDirty);
  const autoDiffMode = hasUncommittedChanges ? "uncommitted" : "base";
  const diffMode = diffModeOverride ?? autoDiffMode;

  const {
    files,
    payloadError: diffPayloadError,
    isLoading: isDiffLoading,
    isFetching: isDiffFetching,
    isError: isDiffError,
    error: diffError,
    refresh: refreshDiff,
  } = useCheckoutDiffQuery({
    serverId,
    cwd,
    mode: diffMode,
    baseRef,
    enabled: isGit,
  });
  const {
    status: prStatus,
    payloadError: prPayloadError,
    refresh: refreshPrStatus,
  } = useCheckoutPrStatusQuery({
    serverId,
    cwd,
    enabled: isGit,
  });
  // Track user-initiated refresh to avoid iOS RefreshControl animation on background fetches
  const [isManualRefresh, setIsManualRefresh] = useState(false);
  const [expandedByPath, setExpandedByPath] = useState<Record<string, boolean>>({});
  const diffMetrics = useMemo(() => {
    let hunkCount = 0;
    let lineCount = 0;
    let tokenCount = 0;
    for (const file of files) {
      hunkCount += file.hunks.length;
      for (const hunk of file.hunks) {
        lineCount += hunk.lines.length;
        for (const line of hunk.lines) {
          if (line.tokens) {
            tokenCount += line.tokens.length;
          }
        }
      }
    }
    return {
      fileCount: files.length,
      hunkCount,
      lineCount,
      tokenCount,
    };
  }, [files]);
  const lastMetricsKeyRef = useRef<string | null>(null);

  const handleRefresh = useCallback(() => {
    setIsManualRefresh(true);
    void refreshDiff();
    void refreshStatus();
    void refreshPrStatus();
  }, [refreshDiff, refreshStatus, refreshPrStatus]);

  const shipDefaultStorageKey = useMemo(() => {
    if (!gitStatus?.repoRoot) {
      return null;
    }
    return `@paseo:changes-ship-default:${gitStatus.repoRoot}`;
  }, [gitStatus?.repoRoot]);

  useEffect(() => {
    if (!shipDefaultStorageKey) {
      return;
    }
    let isActive = true;
    AsyncStorage.getItem(shipDefaultStorageKey)
      .then((value) => {
        if (!isActive) return;
        if (value === "pr" || value === "merge") {
          setShipDefault(value);
        }
      })
      .catch(() => undefined);
    return () => {
      isActive = false;
    };
  }, [shipDefaultStorageKey]);

  const persistShipDefault = useCallback(
    async (next: "merge" | "pr") => {
      setShipDefault(next);
      if (!shipDefaultStorageKey) return;
      try {
        await AsyncStorage.setItem(shipDefaultStorageKey, next);
      } catch {
        // Ignore persistence failures; default will reset to "merge".
      }
    },
    [shipDefaultStorageKey]
  );

  const handleToggleExpanded = useCallback((path: string) => {
    setExpandedByPath((prev) => ({
      ...prev,
      [path]: !prev[path],
    }));
  }, []);

  const diffSections = useMemo((): GitDiffSection[] => {
    return files.map((file, index) => {
      const isExpanded = expandedByPath[file.path] ?? false;
      return {
        key: file.path,
        index,
        file,
        isExpanded,
        data: isExpanded ? [file] : [],
      };
    });
  }, [files, expandedByPath]);

  const allExpanded = useMemo(() => {
    if (files.length === 0) return false;
    return files.every((file) => expandedByPath[file.path]);
  }, [files, expandedByPath]);

  const handleToggleExpandAll = useCallback(() => {
    if (allExpanded) {
      setExpandedByPath({});
    } else {
      const newExpanded: Record<string, boolean> = {};
      for (const file of files) {
        newExpanded[file.path] = true;
      }
      setExpandedByPath(newExpanded);
    }
  }, [allExpanded, files]);

  // Reset manual refresh flag when fetch completes
  useEffect(() => {
    if (!(isDiffFetching || isStatusFetching) && isManualRefresh) {
      setIsManualRefresh(false);
    }
  }, [isDiffFetching, isStatusFetching, isManualRefresh]);

  // Clear diff mode override when auto mode changes (e.g., after commit)
  useEffect(() => {
    setDiffModeOverride(null);
  }, [autoDiffMode]);

  useEffect(() => {
    if (!isPerfLoggingEnabled()) {
      return;
    }
    const metricsKey = `${diffMetrics.fileCount}:${diffMetrics.hunkCount}:${diffMetrics.lineCount}:${diffMetrics.tokenCount}`;
    if (lastMetricsKeyRef.current === metricsKey) {
      return;
    }
    lastMetricsKeyRef.current = metricsKey;
    perfLog(DIFF_PANE_LOG_TAG, {
      event: "files_snapshot",
      serverId,
      agentId,
      fileCount: diffMetrics.fileCount,
      hunkCount: diffMetrics.hunkCount,
      lineCount: diffMetrics.lineCount,
      tokenCount: diffMetrics.tokenCount,
      isLoading: isDiffLoading,
      isFetching: isDiffFetching,
    });
  }, [agentId, diffMetrics, isDiffFetching, isDiffLoading, serverId]);

  const commitMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const payload = await client.checkoutCommit(cwd, { addAll: true });
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      void refreshDiff();
      void refreshStatus();
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to commit";
      setActionError(message);
    },
  });

  const prMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const payload = await client.checkoutPrCreate(cwd, {});
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      void refreshPrStatus();
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to create PR";
      setActionError(message);
    },
  });

  const mergeMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const payload = await client.checkoutMerge(cwd, {
        baseRef,
        strategy: "merge",
        requireCleanTarget: true,
      });
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      void refreshDiff();
      void refreshStatus();
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to merge";
      setActionError(message);
    },
  });

  const mergeFromBaseMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const payload = await client.checkoutMergeFromBase(cwd, {
        baseRef,
        requireCleanTarget: true,
      });
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      void refreshDiff();
      void refreshStatus();
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to merge from base";
      setActionError(message);
    },
  });

  const pushMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const payload = await client.checkoutPush(cwd);
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      void refreshStatus();
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to push";
      setActionError(message);
    },
  });

  const archiveMutation = useMutation({
    mutationFn: async () => {
      if (!client) {
        throw new Error("Daemon client unavailable");
      }
      const worktreePath = status?.cwd;
      if (!worktreePath) {
        throw new Error("Worktree path unavailable");
      }
      const payload = await client.archivePaseoWorktree({ worktreePath });
      if (payload.error) {
        throw new Error(payload.error.message);
      }
      return payload;
    },
    onSuccess: () => {
      setActionError(null);
      queryClient.invalidateQueries({
        predicate: (query) =>
          Array.isArray(query.queryKey) && query.queryKey[0] === "paseoWorktreeList",
      });
      router.replace("/agent" as any);
    },
    onError: (err) => {
      const message = err instanceof Error ? err.message : "Failed to archive worktree";
      setActionError(message);
    },
  });

  // Wrap mutations with action status for UI feedback
  const commitAction = useActionStatus(commitMutation);
  const prCreateAction = useActionStatus(prMutation, () => void persistShipDefault("pr"));
  const mergeAction = useActionStatus(mergeMutation, () => void persistShipDefault("merge"));
  const mergeFromBaseAction = useActionStatus(mergeFromBaseMutation);
  const pushAction = useActionStatus(pushMutation);
  const archiveAction = useActionStatus(archiveMutation);

  const renderFileBody: SectionListRenderItem<ParsedDiffFile, GitDiffSection> = useCallback(
    ({ item, section }) => (
      <DiffFileBody file={item} testID={`diff-file-${section.index}-body`} />
    ),
    []
  );

  const renderSectionHeader = useCallback(
    ({ section }: { section: GitDiffSection }) => (
      <DiffFileHeader
        file={section.file}
        isExpanded={section.isExpanded}
        onToggle={handleToggleExpanded}
        testID={`diff-file-${section.index}`}
      />
    ),
    [handleToggleExpanded]
  );

  const keyExtractor = useCallback((item: ParsedDiffFile) => item.path, []);

  const hasChanges = files.length > 0;
  const diffErrorMessage =
    diffPayloadError?.message ??
    (isDiffError && diffError instanceof Error ? diffError.message : null);
  const prErrorMessage = prPayloadError?.message ?? null;
  const branchLabel =
    gitStatus?.currentBranch && gitStatus.currentBranch !== "HEAD"
      ? gitStatus.currentBranch
      : notGit
        ? "Not a git repository"
        : "Unknown";
  const actionsDisabled = !isGit || Boolean(status?.error) || isStatusLoading;
  const aheadCount = gitStatus?.aheadBehind?.ahead ?? 0;
  const aheadOfOrigin = gitStatus?.aheadOfOrigin ?? 0;
  const baseRefLabel = useMemo(() => {
    if (!baseRef) return "base";
    const trimmed = baseRef.replace(/^refs\/(heads|remotes)\//, "").trim();
    return trimmed.startsWith("origin/") ? trimmed.slice("origin/".length) : trimmed;
  }, [baseRef]);
  const commitDisabled = actionsDisabled || commitMutation.isPending;
  const prDisabled = actionsDisabled || prMutation.isPending;
  const mergeDisabled = actionsDisabled || mergeMutation.isPending || hasUncommittedChanges;
  const mergeFromBaseDisabled =
    actionsDisabled || mergeFromBaseMutation.isPending || hasUncommittedChanges;
  const pushDisabled =
    actionsDisabled || pushMutation.isPending || !(gitStatus?.hasRemote ?? false);
  const archiveDisabled =
    actionsDisabled ||
    archiveMutation.isPending ||
    !gitStatus?.isPaseoOwnedWorktree;

  let bodyContent: ReactElement;

  if (isStatusLoading) {
    bodyContent = (
      <View style={styles.loadingContainer}>
        <ActivityIndicator size="large" />
        <Text style={styles.loadingText}>Checking repository...</Text>
      </View>
    );
  } else if (statusErrorMessage) {
    bodyContent = (
      <View style={styles.errorContainer}>
        <Text style={styles.errorText}>{statusErrorMessage}</Text>
      </View>
    );
  } else if (notGit) {
    bodyContent = (
      <View style={styles.emptyContainer} testID="changes-not-git">
        <Text style={styles.emptyText}>Not a git repository</Text>
      </View>
    );
  } else if (isDiffLoading) {
    bodyContent = (
      <View style={styles.loadingContainer}>
        <ActivityIndicator size="large" />
        <Text style={styles.loadingText}>Loading changes...</Text>
      </View>
    );
  } else if (diffErrorMessage) {
    bodyContent = (
      <View style={styles.errorContainer}>
        <Text style={styles.errorText}>{diffErrorMessage}</Text>
      </View>
    );
  } else if (!hasChanges) {
    bodyContent = (
      <View style={styles.emptyContainer}>
        <Text style={styles.emptyText}>
          {diffMode === "uncommitted" ? "No uncommitted changes" : `No changes vs ${baseRefLabel}`}
        </Text>
      </View>
    );
  } else {
    bodyContent = (
      <SectionList
        sections={diffSections}
        renderItem={renderFileBody}
        renderSectionHeader={renderSectionHeader}
        keyExtractor={keyExtractor}
        stickySectionHeadersEnabled
        extraData={expandedByPath}
        style={styles.scrollView}
        contentContainerStyle={styles.contentContainer}
        testID="git-diff-scroll"
        onRefresh={handleRefresh}
        refreshing={isManualRefresh && isDiffFetching}
        initialNumToRender={3}
        maxToRenderPerBatch={3}
        windowSize={5}
      />
    );
  }

  const hasPullRequest = Boolean(prStatus?.url);
  const hasRemote = gitStatus?.hasRemote ?? false;
  const isPaseoOwnedWorktree = gitStatus?.isPaseoOwnedWorktree ?? false;
  const currentBranch = gitStatus?.currentBranch;
  const isOnBaseBranch = currentBranch === baseRefLabel;

  // ==========================================================================
  // Git Actions (Data-Oriented)
  // ==========================================================================
  // All possible actions are computed as data, then partitioned into:
  // - primary: The main CTA button
  // - secondary: Dropdown next to primary button
  // - menu: Kebab overflow menu
  // ==========================================================================

  const gitActions: GitActions = useMemo(() => {
    if (!isGit) {
      return { primary: null, secondary: [], menu: [] };
    }

    // Build all possible actions
    const allActions = new Map<GitActionId, GitAction>();

    // Commit - always available
    allActions.set("commit", {
      id: "commit",
      label: "Commit",
      pendingLabel: "Committing...",
      successLabel: "Committed",
      disabled: commitDisabled,
      status: commitAction.status,
      handler: commitAction.trigger,
    });

    // Push - when has remote
    if (hasRemote) {
      allActions.set("push", {
        id: "push",
        label: "Push",
        pendingLabel: "Pushing...",
        successLabel: "Pushed",
        disabled: pushDisabled,
        status: pushAction.status,
        description: !hasRemote ? "No remote configured" : undefined,
        handler: pushAction.trigger,
      });
    }

    // View PR - when PR exists
    if (hasPullRequest && prStatus?.url) {
      const prUrl = prStatus.url;
      allActions.set("view-pr", {
        id: "view-pr",
        label: "View PR",
        pendingLabel: "View PR",
        successLabel: "View PR",
        disabled: false,
        status: "idle",
        handler: () => openURLInNewTab(prUrl),
      });
    }

    // Create PR - when ahead of base and no PR
    if (aheadCount > 0 && !hasPullRequest) {
      allActions.set("create-pr", {
        id: "create-pr",
        label: "Create PR",
        pendingLabel: "Creating PR...",
        successLabel: "PR Created",
        disabled: prDisabled,
        status: prCreateAction.status,
        handler: prCreateAction.trigger,
      });
    }

    // Merge branch - when ahead of base
    if (aheadCount > 0) {
      allActions.set("merge-branch", {
        id: "merge-branch",
        label: `Merge into ${baseRefLabel}`,
        pendingLabel: "Merging...",
        successLabel: "Merged",
        disabled: mergeDisabled,
        status: mergeAction.status,
        description: hasUncommittedChanges ? "Requires clean working tree" : undefined,
        handler: mergeAction.trigger,
      });
    }

    // Update from base - only when not on base branch
    if (!isOnBaseBranch) {
      allActions.set("merge-from-base", {
        id: "merge-from-base",
        label: `Update from ${baseRefLabel}`,
        pendingLabel: "Updating...",
        successLabel: "Updated",
        disabled: mergeFromBaseDisabled,
        status: mergeFromBaseAction.status,
        description: hasUncommittedChanges ? "Requires clean working tree" : undefined,
        handler: mergeFromBaseAction.trigger,
      });
    }

    // Archive worktree - only for Paseo worktrees
    if (isPaseoOwnedWorktree) {
      allActions.set("archive-worktree", {
        id: "archive-worktree",
        label: "Archive worktree",
        pendingLabel: "Archiving...",
        successLabel: "Archived",
        disabled: archiveDisabled,
        status: archiveAction.status,
        icon: <Archive size={16} color={theme.colors.foregroundMuted} />,
        handler: archiveAction.trigger,
      });
    }

    // Select primary action (priority rules)
    let primaryActionId: GitActionId | null = null;

    // Rule 1: Uncommitted changes → Commit
    if (hasUncommittedChanges) {
      primaryActionId = "commit";
    }
    // Rule 2: Ahead of origin → Push
    else if (aheadOfOrigin > 0 && allActions.has("push") && !pushDisabled) {
      primaryActionId = "push";
    }
    // Rule 3: Has PR → View PR
    else if (hasPullRequest) {
      primaryActionId = "view-pr";
    }
    // Rule 4: Ahead of base → Ship action based on preference
    else if (aheadCount > 0) {
      const preferred: GitActionId = shipDefault === "merge" ? "merge-branch" : "create-pr";
      const fallback: GitActionId = shipDefault === "merge" ? "create-pr" : "merge-branch";

      const preferredAction = allActions.get(preferred);
      const fallbackAction = allActions.get(fallback);

      if (preferredAction && !preferredAction.disabled) {
        primaryActionId = preferred;
      } else if (fallbackAction && !fallbackAction.disabled) {
        primaryActionId = fallback;
      } else if (preferredAction) {
        primaryActionId = preferred;
      }
    }

    const primary = primaryActionId ? allActions.get(primaryActionId) ?? null : null;

    // Secondary actions: ship-related + merge from base + push (excluding primary)
    const secondaryIds: GitActionId[] = ["merge-branch", "create-pr", "view-pr", "merge-from-base", "push"];
    const secondary = secondaryIds
      .filter(id => id !== primaryActionId && allActions.has(id))
      .map(id => allActions.get(id)!);

    // Menu actions: archive worktree only
    const menu = allActions.has("archive-worktree")
      ? [allActions.get("archive-worktree")!]
      : [];

    return { primary, secondary, menu };
  }, [
    isGit, hasRemote, hasPullRequest, prStatus?.url, aheadCount, isPaseoOwnedWorktree, isOnBaseBranch,
    hasUncommittedChanges, aheadOfOrigin, shipDefault, baseRefLabel,
    commitDisabled, pushDisabled, prDisabled, mergeDisabled, mergeFromBaseDisabled, archiveDisabled,
    commitAction, pushAction, prCreateAction, mergeAction, mergeFromBaseAction, archiveAction,
  ]);

  // Helper to get display label based on status
  const getActionDisplayLabel = useCallback((action: GitAction): string => {
    if (action.status === "pending") return action.pendingLabel;
    if (action.status === "success") return action.successLabel;
    return action.label;
  }, []);

  return (
    <View style={styles.container}>
      <View style={styles.header} testID="changes-header">
        <View style={styles.headerLeft}>
          <GitBranch size={16} color={theme.colors.foregroundMuted} />
          <Text style={styles.branchLabel} testID="changes-branch" numberOfLines={1}>
            {branchLabel}
          </Text>
          {isStatusFetching && (
            <ActivityIndicator size="small" color={theme.colors.foregroundMuted} />
          )}
        </View>
        {isGit ? (
          <View style={styles.headerRight}>
            {gitActions.primary ? (
              <View style={styles.splitButton}>
                <Pressable
                  testID="changes-primary-cta"
                  style={[
                    styles.splitButtonPrimary,
                    gitActions.primary.disabled && styles.splitButtonPrimaryDisabled,
                  ]}
                  onPress={gitActions.primary.handler}
                  disabled={gitActions.primary.disabled}
                  accessibilityRole="button"
                  accessibilityLabel={gitActions.primary.label}
                >
                  {gitActions.primary.status === "pending" ? (
                    <ActivityIndicator size="small" color={theme.colors.foreground} style={styles.splitButtonSpinner} />
                  ) : (
                    <Text style={styles.splitButtonText}>{getActionDisplayLabel(gitActions.primary)}</Text>
                  )}
                </Pressable>
                {gitActions.secondary.length > 0 ? (
                  <DropdownMenu>
                    <DropdownMenuTrigger
                      testID="changes-primary-cta-caret"
                      style={styles.splitButtonCaret}
                      accessibilityRole="button"
                      accessibilityLabel="More options"
                    >
                      <ChevronDown size={16} color={theme.colors.foregroundMuted} />
                    </DropdownMenuTrigger>
                    <DropdownMenuContent align="end" testID="changes-primary-cta-menu">
                      {gitActions.secondary.map((action, index) => {
                        const needsSeparator = action.id === "merge-from-base" || action.id === "push";
                        return (
                          <View key={action.id}>
                            {needsSeparator && index > 0 ? <DropdownMenuSeparator /> : null}
                            <DropdownMenuItem
                              testID={`changes-menu-${action.id}`}
                              disabled={action.disabled}
                              status={action.status}
                              pendingLabel={action.pendingLabel}
                              successLabel={action.successLabel}
                              closeOnSelect={action.status === "idle" && action.id === "view-pr"}
                              description={action.description}
                              onSelect={action.handler}
                            >
                              {action.label}
                            </DropdownMenuItem>
                          </View>
                        );
                      })}
                    </DropdownMenuContent>
                  </DropdownMenu>
                ) : null}
              </View>
            ) : null}
            {gitActions.menu.length > 0 ? (
              <DropdownMenu>
                <DropdownMenuTrigger
                  testID="changes-overflow-menu"
                  hitSlop={8}
                  style={styles.iconButton}
                  accessibilityRole="button"
                  accessibilityLabel="More actions"
                >
                  <MoreVertical size={16} color={theme.colors.foregroundMuted} />
                </DropdownMenuTrigger>
                <DropdownMenuContent align="end" width={220} testID="changes-overflow-content">
                  {gitActions.menu.map((action) => (
                    <DropdownMenuItem
                      key={action.id}
                      testID={`changes-menu-${action.id}`}
                      leading={action.icon}
                      disabled={action.disabled}
                      status={action.status}
                      pendingLabel={action.pendingLabel}
                      successLabel={action.successLabel}
                      closeOnSelect={false}
                      onSelect={action.handler}
                    >
                      {action.label}
                    </DropdownMenuItem>
                  ))}
                </DropdownMenuContent>
              </DropdownMenu>
            ) : null}
          </View>
        ) : null}
      </View>

      {isGit && (hasUncommittedChanges || aheadCount > 0) ? (
        <View style={styles.diffStatusContainer}>
          <View style={styles.diffStatusInner}>
            <Pressable
              style={({ hovered, pressed }) => [
                styles.diffStatusRow,
                (hovered || pressed) && styles.diffStatusRowHovered,
              ]}
              testID="changes-diff-status"
              onPress={() => setDiffModeOverride(diffMode === "uncommitted" ? "base" : "uncommitted")}
            >
              {({ hovered, pressed }) => (
                <>
                  <Text style={styles.diffStatusText}>
                    {diffMode === "uncommitted" ? "Uncommitted" : "Committed"}
                  </Text>
                  {(hovered || pressed) ? (
                    <ArrowLeftRight size={12} color={theme.colors.foregroundMuted} />
                  ) : null}
                </>
            )}
            </Pressable>
            {files.length > 0 ? (
              <Pressable
                style={({ hovered, pressed }) => [
                  styles.expandAllButton,
                  (hovered || pressed) && styles.diffStatusRowHovered,
                ]}
                onPress={handleToggleExpandAll}
              >
                {allExpanded ? (
                  <ListChevronsDownUp size={14} color={theme.colors.foregroundMuted} />
                ) : (
                  <ListChevronsUpDown size={14} color={theme.colors.foregroundMuted} />
                )}
              </Pressable>
            ) : null}
          </View>
        </View>
      ) : null}

      {actionError ? <Text style={styles.actionErrorText}>{actionError}</Text> : null}
      {prErrorMessage ? (
        <Text style={styles.actionErrorText}>{prErrorMessage}</Text>
      ) : null}

      <View style={styles.diffContainer}>{bodyContent}</View>
    </View>
  );
}

const styles = StyleSheet.create((theme) => ({
  container: {
    flex: 1,
    minHeight: 0,
  },
  header: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
    gap: theme.spacing[2],
    paddingHorizontal: theme.spacing[3],
    paddingVertical: theme.spacing[2],
    borderBottomWidth: 1,
    borderBottomColor: theme.colors.border,
  },
  headerLeft: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[2],
    flex: 1,
    minWidth: 0,
  },
  headerRight: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[1],
    flexShrink: 0,
  },
  branchLabel: {
    fontSize: theme.fontSize.sm,
    color: theme.colors.foreground,
    fontWeight: theme.fontWeight.medium,
    flexShrink: 1,
  },
  diffStatusContainer: {
    borderBottomWidth: 1,
    borderBottomColor: theme.colors.border,
  },
  diffStatusInner: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
    paddingRight: theme.spacing[3],
  },
  diffStatusRow: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[1],
    // Align text with header branch icon (at spacing[3] from edge, minus our horizontal padding)
    marginLeft: theme.spacing[3] - theme.spacing[1],
    marginVertical: theme.spacing[2],
    paddingHorizontal: theme.spacing[1],
    paddingVertical: theme.spacing[1],
    borderRadius: theme.borderRadius.base,
  },
  diffStatusRowHovered: {
    backgroundColor: theme.colors.surface2,
  },
  diffStatusText: {
    fontSize: theme.fontSize.xs,
    color: theme.colors.foregroundMuted,
  },
  diffStatusIconHidden: {
    opacity: 0,
  },
  expandAllButton: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[1],
    marginVertical: theme.spacing[2],
    paddingHorizontal: theme.spacing[1],
    paddingVertical: theme.spacing[1],
    borderRadius: theme.borderRadius.base,
  },
  splitButton: {
    flexDirection: "row",
    alignItems: "stretch",
    borderRadius: theme.borderRadius.md,
    backgroundColor: theme.colors.surface2,
    borderWidth: theme.borderWidth[1],
    borderColor: theme.colors.borderAccent,
    overflow: "hidden",
  },
  splitButtonPrimary: {
    paddingHorizontal: theme.spacing[3],
    paddingVertical: theme.spacing[2],
    justifyContent: "center",
  },
  splitButtonPrimaryDisabled: {
    opacity: 0.6,
  },
  splitButtonText: {
    fontSize: theme.fontSize.xs,
    lineHeight: theme.fontSize.xs * 1.5,
    color: theme.colors.foreground,
    fontWeight: theme.fontWeight.medium,
  },
  splitButtonSpinner: {
    height: theme.fontSize.xs * 1.5,
    width: theme.fontSize.xs * 1.5,
  },
  splitButtonCaret: {
    width: 36,
    alignItems: "center",
    justifyContent: "center",
    borderLeftWidth: theme.borderWidth[1],
    borderLeftColor: theme.colors.borderAccent,
  },
  iconButton: {
    width: 32,
    height: 32,
    alignItems: "center",
    justifyContent: "center",
    borderRadius: theme.borderRadius.md,
  },
  menuOverlay: {
    flex: 1,
  },
  menuBackdrop: {
    position: "absolute",
    top: 0,
    right: 0,
    bottom: 0,
    left: 0,
  },
  dropdownMenu: {
    backgroundColor: theme.colors.surface0,
    borderWidth: 1,
    borderColor: theme.colors.borderAccent,
    borderRadius: theme.borderRadius.lg,
    overflow: "hidden",
    shadowColor: "#000",
    shadowOffset: { width: 0, height: 4 },
    shadowOpacity: 0.2,
    shadowRadius: 8,
    elevation: 8,
  },
  menuItem: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[2],
    paddingHorizontal: theme.spacing[3],
    paddingVertical: theme.spacing[2],
  },
  menuItemSelected: {
    backgroundColor: theme.colors.surface2,
  },
  menuItemDisabled: {
    opacity: 0.5,
  },
  menuItemText: {
    fontSize: theme.fontSize.sm,
    color: theme.colors.foreground,
    fontWeight: theme.fontWeight.medium,
  },
  menuHintText: {
    paddingHorizontal: theme.spacing[3],
    paddingBottom: theme.spacing[2],
    fontSize: theme.fontSize.xs,
    color: theme.colors.foregroundMuted,
  },
  menuItemDestructive: {
    backgroundColor: "rgba(248, 81, 73, 0.08)",
  },
  menuItemTextDestructive: {
    color: theme.colors.destructive,
  },
  menuDivider: {
    height: 1,
    backgroundColor: theme.colors.border,
  },
  actionErrorText: {
    paddingHorizontal: theme.spacing[3],
    paddingBottom: theme.spacing[1],
    fontSize: theme.fontSize.xs,
    color: theme.colors.destructive,
  },
  diffContainer: {
    flex: 1,
    minHeight: 0,
  },
  scrollView: {
    flex: 1,
  },
  contentContainer: {
    paddingBottom: theme.spacing[8],
  },
  loadingContainer: {
    flex: 1,
    alignItems: "center",
    justifyContent: "center",
    paddingTop: theme.spacing[16],
    gap: theme.spacing[4],
  },
  loadingText: {
    fontSize: theme.fontSize.base,
    color: theme.colors.foregroundMuted,
  },
  errorContainer: {
    flex: 1,
    alignItems: "center",
    justifyContent: "center",
    paddingTop: theme.spacing[16],
    paddingHorizontal: theme.spacing[6],
  },
  errorText: {
    fontSize: theme.fontSize.base,
    color: theme.colors.destructive,
    textAlign: "center",
  },
  emptyContainer: {
    flex: 1,
    alignItems: "center",
    justifyContent: "center",
    paddingTop: theme.spacing[16],
  },
  emptyText: {
    fontSize: theme.fontSize.lg,
    color: theme.colors.foregroundMuted,
  },
  fileSection: {
    overflow: "hidden",
    backgroundColor: theme.colors.surface2,
    borderBottomWidth: 1,
    borderBottomColor: theme.colors.borderAccent,
  },
  fileSectionHeaderContainer: {
    overflow: "hidden",
    backgroundColor: theme.colors.surface2,
  },
  fileSectionBodyContainer: {
    overflow: "hidden",
    backgroundColor: theme.colors.surface2,
  },
  fileSectionBorder: {
    borderBottomWidth: 1,
    borderBottomColor: theme.colors.borderAccent,
  },
  fileHeader: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "space-between",
    paddingHorizontal: theme.spacing[2],
    paddingVertical: theme.spacing[2],
    gap: theme.spacing[1],
    backgroundColor: theme.colors.surface2,
    zIndex: 2,
    elevation: 2,
  },
  fileHeaderPressed: {
    opacity: 0.7,
  },
  fileHeaderLeft: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[1],
    flex: 1,
    minWidth: 0,
  },
  fileHeaderRight: {
    flexDirection: "row",
    alignItems: "center",
    gap: theme.spacing[1],
    flexShrink: 0,
  },
  chevronContainer: {
    transform: [{ rotate: "0deg" }],
  },
  chevronExpanded: {
    transform: [{ rotate: "90deg" }],
  },
  fileName: {
    fontSize: theme.fontSize.sm,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.foreground,
    flexShrink: 0,
  },
  fileDir: {
    fontSize: theme.fontSize.sm,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.foregroundMuted,
    flex: 1,
  },
  newBadge: {
    backgroundColor: "rgba(46, 160, 67, 0.2)",
    paddingHorizontal: theme.spacing[2],
    paddingVertical: theme.spacing[1],
    borderRadius: theme.borderRadius.md,
    flexShrink: 0,
  },
  newBadgeText: {
    fontSize: theme.fontSize.xs,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.palette.green[400],
  },
  deletedBadge: {
    backgroundColor: "rgba(248, 81, 73, 0.2)",
    paddingHorizontal: theme.spacing[2],
    paddingVertical: theme.spacing[1],
    borderRadius: theme.borderRadius.md,
    flexShrink: 0,
  },
  deletedBadgeText: {
    fontSize: theme.fontSize.xs,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.palette.red[500],
  },
  additions: {
    fontSize: theme.fontSize.xs,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.palette.green[400],
  },
  deletions: {
    fontSize: theme.fontSize.xs,
    fontWeight: theme.fontWeight.normal,
    color: theme.colors.palette.red[500],
  },
  diffContent: {
    borderTopWidth: theme.borderWidth[1],
    borderTopColor: theme.colors.border,
    backgroundColor: theme.colors.surface1,
  },
  diffContentInner: {
    flexDirection: "column",
  },
  linesContainer: {
    backgroundColor: theme.colors.surface1,
  },
  diffLineContainer: {
    paddingHorizontal: theme.spacing[3],
    paddingVertical: theme.spacing[1],
  },
  diffLineText: {
    fontSize: theme.fontSize.xs,
    fontFamily: Fonts.mono,
    color: theme.colors.foreground,
  },
  addLineContainer: {
    backgroundColor: "rgba(46, 160, 67, 0.15)", // GitHub green
  },
  addLineText: {
    color: theme.colors.foreground,
  },
  removeLineContainer: {
    backgroundColor: "rgba(248, 81, 73, 0.1)", // GitHub red
  },
  removeLineText: {
    color: theme.colors.foreground,
  },
  headerLineContainer: {
    backgroundColor: theme.colors.surface2,
  },
  headerLineText: {
    color: theme.colors.foregroundMuted,
  },
  contextLineContainer: {
    backgroundColor: theme.colors.surface1,
  },
  contextLineText: {
    color: theme.colors.foregroundMuted,
  },
  statusMessageContainer: {
    borderTopWidth: theme.borderWidth[1],
    borderTopColor: theme.colors.border,
    backgroundColor: theme.colors.surface1,
    paddingHorizontal: theme.spacing[3],
    paddingVertical: theme.spacing[4],
  },
  statusMessageText: {
    fontSize: theme.fontSize.sm,
    color: theme.colors.foregroundMuted,
    fontStyle: "italic",
  },
}));