import assert from "node:assert/strict";
import { execFileSync } from "node:child_process";
import {
  access,
  chmod,
  mkdir,
  mkdtemp,
  rm,
  writeFile,
} from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import test from "node:test";

import type { ExtensionContext } from "@earendil-works/pi-coding-agent";

import { createContextualBashTool } from "./index.ts";

function git(cwd: string, ...args: string[]): void {
  execFileSync("git", args, { cwd, stdio: "pipe" });
}

function getOutput(
  result: Awaited<ReturnType<ReturnType<typeof createContextualBashTool>["execute"]>>,
): string {
  return result.content
    .filter((item) => item.type === "text")
    .map((item) => item.text)
    .join("")
    .trim();
}

async function executeIn(
  sessionCwd: string,
  command: string,
  cwd?: string,
) {
  const params = cwd === undefined ? { command } : { command, cwd };
  return createContextualBashTool({}).execute(
    "bash-cwd-test",
    params,
    undefined,
    undefined,
    {
      cwd: sessionCwd,
      sessionManager: {
        getSessionId: () => "bash-cwd-test-session",
        getSessionFile: () => undefined,
      },
    } as ExtensionContext,
  );
}

test("bash honors hidden-worktree and nested-package cwd arguments", async (t) => {
  const repository = await mkdtemp(join(tmpdir(), "pi-bash-cwd-"));
  t.after(() => rm(repository, { recursive: true, force: true }));

  await writeFile(join(repository, ".gitignore"), ".worktrees/\n");
  await mkdir(join(repository, "extensions", "fixture"), { recursive: true });
  await writeFile(
    join(repository, "extensions", "fixture", "package.json"),
    '{"private":true}\n',
  );

  git(repository, "init", "--initial-branch=main");
  git(repository, "config", "user.name", "Bash cwd test");
  git(repository, "config", "user.email", "bash-cwd@example.invalid");
  git(repository, "add", ".");
  git(repository, "commit", "-m", "fixture");

  const worktree = join(repository, ".worktrees", "feature");
  git(repository, "worktree", "add", "-b", "feature", worktree, "main");
  const packageDirectory = join(worktree, "extensions", "fixture");

  assert.equal(getOutput(await executeIn(repository, "pwd")), repository);
  assert.equal(
    getOutput(await executeIn(repository, 'printf %s "$PI_SESSION_ID"')),
    "bash-cwd-test-session",
  );
  assert.equal(getOutput(await executeIn(repository, "pwd", worktree)), worktree);
  assert.equal(
    getOutput(
      await executeIn(
        repository,
        "pwd",
        ".worktrees/feature/extensions/fixture",
      ),
    ),
    packageDirectory,
  );

  const missingDirectory = join(worktree, "missing");
  const sentinel = join(repository, "should-not-run");
  await assert.rejects(
    executeIn(repository, "touch should-not-run", missingDirectory),
    /Working directory does not exist/,
  );
  await assert.rejects(access(sentinel));
});

test("bash preserves configured command prefixes and shell paths", async (t) => {
  const directory = await mkdtemp(join(tmpdir(), "pi-bash-cwd-options-"));
  t.after(() => rm(directory, { recursive: true, force: true }));

  const shellMarker = join(directory, "custom-shell-used");
  const shell = join(directory, "custom-shell");
  await writeFile(
    shell,
    `#!/bin/sh\nprintf used > "${shellMarker}"\nexec /bin/bash "$@"\n`,
  );
  await chmod(shell, 0o755);

  await mkdir(join(directory, ".pi"));
  await writeFile(
    join(directory, ".pi", "settings.json"),
    JSON.stringify({
      shellCommandPrefix: "printf prefix-",
      shellPath: shell,
    }),
  );

  const tool = createContextualBashTool();
  const result = await tool.execute(
    "bash-cwd-options-test",
    { command: "printf command", cwd: directory },
    undefined,
    undefined,
    {
      cwd: directory,
      sessionManager: {
        getSessionId: () => "bash-cwd-test-session",
        getSessionFile: () => undefined,
      },
      isProjectTrusted: () => true,
    } as ExtensionContext,
  );

  assert.equal(getOutput(result), "prefix-command");
  await access(shellMarker);
});

test("bash exposes cwd without changing existing arguments", () => {
  const schema = createContextualBashTool({}).parameters;
  assert.deepEqual(Object.keys(schema.properties), ["command", "cwd", "timeout"]);
  assert.deepEqual(schema.required, ["command"]);
});

test("bash fails before execution when Pi omits the tool context", async () => {
  const tool = createContextualBashTool({});
  await assert.rejects(
    tool.execute(
      "bash-cwd-test",
      { command: "pwd" },
      undefined,
      undefined,
      undefined as unknown as ExtensionContext,
    ),
    /Bash execution context is unavailable/,
  );
});