#!/usr/bin/env python3
"""Regression tests for plugin versioning and marketplace package verification."""

from __future__ import annotations

import importlib.util
import json
import subprocess
import sys
import tempfile
from contextlib import contextmanager
from pathlib import Path
from types import ModuleType
from typing import Iterator, Optional

ROOT = Path(__file__).resolve().parent.parent
VERIFY_SCRIPT = ROOT / "scripts/verify-plugin-package.py"
BUMP_SCRIPT = ROOT / "scripts/bump-plugin-version.py"
PLUGIN_NAME = "diagram-design"


def load_module(name: str, path: Path) -> ModuleType:
    sys.dont_write_bytecode = True
    spec = importlib.util.spec_from_file_location(name, path)
    if spec is None or spec.loader is None:
        raise AssertionError(f"could not load {path}")
    module = importlib.util.module_from_spec(spec)
    spec.loader.exec_module(module)
    return module


VERIFY = load_module("verify_plugin_package", VERIFY_SCRIPT)
BUMP = load_module("bump_plugin_version", BUMP_SCRIPT)


def write_json(path: Path, payload: dict) -> None:
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text(json.dumps(payload, indent=2) + "\n", encoding="utf-8")


def manifest(version: str, codex: bool = False) -> dict:
    payload = {
        "name": PLUGIN_NAME,
        "description": "Create editorial diagrams.",
        "version": version,
        "author": {"name": "Cathryn Lavery"},
    }
    if codex:
        payload["skills"] = "./skills/"
    return payload


def seed_factory(root: Path, version: str) -> None:
    write_json(root / ".factory-plugin/plugin.json", manifest(version))
    write_json(
        root / ".factory-plugin/marketplace.json",
        {
            "name": PLUGIN_NAME,
            "plugins": [{"name": PLUGIN_NAME, "source": "./"}],
        },
    )


def seed_package(
    root: Path, version: str = "1.2.3", include_factory: bool = True
) -> None:
    write_json(root / ".claude-plugin/plugin.json", manifest(version))
    write_json(root / ".codex-plugin/plugin.json", manifest(version, codex=True))
    if include_factory:
        seed_factory(root, version)
    write_json(
        root / ".claude-plugin/marketplace.json",
        {
            "name": PLUGIN_NAME,
            "plugins": [{"name": PLUGIN_NAME, "source": "./"}],
        },
    )
    write_json(
        root / ".agents/plugins/marketplace.json",
        {
            "name": PLUGIN_NAME,
            "plugins": [
                {
                    "name": PLUGIN_NAME,
                    "source": {"source": "local", "path": "./"},
                    "policy": {
                        "installation": "AVAILABLE",
                        "authentication": "ON_INSTALL",
                    },
                    "category": "Productivity",
                }
            ],
        },
    )
    skill = root / "skills" / PLUGIN_NAME / "SKILL.md"
    skill.parent.mkdir(parents=True, exist_ok=True)
    skill.write_text(f"---\nname: {PLUGIN_NAME}\n---\n", encoding="utf-8")
    command = root / "commands" / "export-diagram.md"
    command.parent.mkdir(parents=True, exist_ok=True)
    command.write_text("Export the diagram.\n", encoding="utf-8")


@contextmanager
def package_repo(include_factory: bool = True) -> Iterator[Path]:
    with tempfile.TemporaryDirectory() as scratch:
        root = Path(scratch)
        seed_package(root, include_factory=include_factory)
        subprocess.run(["git", "init", "-q"], cwd=root, check=True)
        subprocess.run(["git", "config", "user.name", "Package Test"], cwd=root, check=True)
        subprocess.run(
            ["git", "config", "user.email", "package-test@example.invalid"],
            cwd=root,
            check=True,
        )
        subprocess.run(["git", "add", "."], cwd=root, check=True)
        subprocess.run(["git", "commit", "-qm", "base package"], cwd=root, check=True)
        yield root


def set_versions(
    root: Path, claude: str, codex: str, factory: Optional[str] = None
) -> None:
    if factory is None:
        factory = codex
    for relative, version in (
        (Path(".claude-plugin/plugin.json"), claude),
        (Path(".codex-plugin/plugin.json"), codex),
        (Path(".factory-plugin/plugin.json"), factory),
    ):
        payload = json.loads((root / relative).read_text(encoding="utf-8"))
        payload["version"] = version
        write_json(root / relative, payload)


def set_existing_versions(root: Path, version: str) -> None:
    for relative in VERIFY.MANIFEST_PATHS.values():
        path = root / relative
        if not path.is_file():
            continue
        payload = json.loads(path.read_text(encoding="utf-8"))
        payload["version"] = version
        write_json(path, payload)


def expect_failure(label: str, errors: list[str], needle: str) -> None:
    if not any(needle in error for error in errors):
        raise AssertionError(f"{label}: expected {needle!r}, got {errors}")
    print(f"OK: {label} rejected")


def test_verifier() -> None:
    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4")
        errors = VERIFY.verify_package(root, "HEAD")
        if errors:
            raise AssertionError(f"valid bump failed: {errors}")
        print("OK: valid synchronized bump accepted")

    with package_repo() as root:
        expect_failure(
            "missing bump",
            VERIFY.verify_package(root, "HEAD"),
            "must increase",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.5")
        expect_failure(
            "mismatched manifests",
            VERIFY.verify_package(root, "HEAD"),
            "versions must match",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4", "1.2.5")
        expect_failure(
            "Factory version drift",
            VERIFY.verify_package(root, "HEAD"),
            "versions must match",
        )

    with package_repo() as root:
        set_versions(root, "1.2", "1.2")
        expect_failure(
            "malformed versions",
            VERIFY.verify_package(root, "HEAD"),
            "strict MAJOR.MINOR.PATCH",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4")
        marketplace_path = root / ".agents/plugins/marketplace.json"
        marketplace = json.loads(marketplace_path.read_text(encoding="utf-8"))
        marketplace["plugins"][0]["source"]["path"] = "./missing"
        write_json(marketplace_path, marketplace)
        expect_failure(
            "missing marketplace target",
            VERIFY.verify_package(root, "HEAD"),
            "target does not exist",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4")
        marketplace_path = root / ".factory-plugin/marketplace.json"
        marketplace = json.loads(marketplace_path.read_text(encoding="utf-8"))
        marketplace["plugins"][0]["source"] = {
            "source": "local",
            "path": "./",
        }
        write_json(marketplace_path, marketplace)
        expect_failure(
            "non-native Factory marketplace source",
            VERIFY.verify_package(root, "HEAD"),
            "must be a non-empty local path string",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4")
        (root / "commands/export-diagram.md").unlink()
        expect_failure(
            "missing shared command surface",
            VERIFY.verify_package(root, "HEAD"),
            "packaged commands are missing",
        )

    with package_repo(include_factory=False) as root:
        set_existing_versions(root, "1.2.4")
        seed_factory(root, "1.2.4")
        errors = VERIFY.verify_package(root, "HEAD")
        if errors:
            raise AssertionError(f"valid Factory bootstrap failed: {errors}")
        print("OK: synchronized Factory bootstrap accepted")

    with package_repo(include_factory=False) as root:
        seed_factory(root, "1.2.3")
        expect_failure(
            "Factory bootstrap without package bump",
            VERIFY.verify_package(root, "HEAD"),
            "must increase",
        )

    with package_repo(include_factory=False) as root:
        set_existing_versions(root, "1.2.4")
        seed_factory(root, "1.2.4")
        factory_path = root / ".factory-plugin/plugin.json"
        factory = json.loads(factory_path.read_text(encoding="utf-8"))
        factory["description"] = "Drifted Factory description."
        write_json(factory_path, factory)
        expect_failure(
            "Factory bootstrap with manifest drift",
            VERIFY.verify_package(root, "HEAD"),
            "must match Claude",
        )

    with package_repo() as root:
        set_versions(root, "1.2.4", "1.2.4")
        (root / ".factory-plugin/plugin.json").unlink()
        expect_failure(
            "Factory manifest deletion",
            VERIFY.verify_package(root, "HEAD"),
            "could not read",
        )


def test_bumper() -> None:
    cases = (("patch", "1.2.4"), ("minor", "1.3.0"), ("major", "2.0.0"))
    for part, expected in cases:
        with tempfile.TemporaryDirectory() as scratch:
            root = Path(scratch)
            seed_package(root)
            actual = BUMP.bump(root, part)
            versions = {
                json.loads((root / relative).read_text(encoding="utf-8"))["version"]
                for relative in BUMP.MANIFEST_PATHS
            }
            if actual != expected or versions != {expected}:
                raise AssertionError(
                    f"{part} bump: expected {expected}, got {actual} and {versions}"
                )
            print(f"OK: {part} bump produced {expected}")

    with tempfile.TemporaryDirectory() as scratch:
        root = Path(scratch)
        seed_package(root)
        set_versions(root, "1.2.3", "1.2.4")
        try:
            BUMP.bump(root)
        except BUMP.PackageVersionError as exc:
            if "not synchronized" not in str(exc):
                raise AssertionError(f"unexpected mismatch error: {exc}") from exc
        else:
            raise AssertionError("version bumper accepted mismatched manifests")
        print("OK: version bumper rejects mismatched manifests")


def main() -> int:
    test_verifier()
    test_bumper()
    print("All plugin package tests passed")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())