"""Install the explicitly labeled two-project test registry for disposable work."""

from __future__ import annotations

import argparse
import json
import os
import secrets
from pathlib import Path

from gewu.application.paths import reject_symlink_components


def main() -> None:
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--replace", action="store_true")
    arguments = parser.parse_args()
    data_root = Path(os.environ.get("GEWU_DATA_ROOT", "./.data/gewu")).expanduser().absolute()
    reject_symlink_components(data_root)
    control_root = data_root / "control"
    reject_symlink_components(control_root)
    control_root.mkdir(parents=True, exist_ok=True, mode=0o700)
    control_root.chmod(0o700)
    destination = control_root / "registry.json"
    if destination.exists() and not arguments.replace:
        raise SystemExit("Registry exists; pass --replace only to deliberately reset it")

    fixture_path = (
        Path(__file__).resolve().parents[1] / "schema" / "fixtures" / "pilot-projects.json"
    )

    def reject_duplicate_keys(pairs: list[tuple[str, object]]) -> dict[str, object]:
        result: dict[str, object] = {}
        for key, value in pairs:
            if key in result:
                raise ValueError("Test fixture has duplicate JSON keys")
            result[key] = value
        return result

    fixture = json.loads(
        fixture_path.read_text(encoding="utf-8"), object_pairs_hook=reject_duplicate_keys
    )
    project_fields = {
        "project_id",
        "title",
        "status",
        "north_star",
        "key_questions",
        "autonomy_policy_id",
    }
    projects = []
    for item in fixture["projects"]:
        project = {key: value for key, value in item.items() if key in project_fields}
        projects.append(project)
    config = {
        "schema_version": 1,
        "projects": projects,
        "policies": fixture["test_policies"],
    }
    temporary = control_root / f".{secrets.token_hex(12)}.tmp"
    try:
        with temporary.open("x", encoding="utf-8") as stream:
            json.dump(config, stream, ensure_ascii=False, allow_nan=False, indent=2)
            stream.flush()
            os.fsync(stream.fileno())
        os.chmod(temporary, 0o600)
        os.replace(temporary, destination)
    finally:
        temporary.unlink(missing_ok=True)
    print("Installed disposable fixture projects and test-only acceptance policies.")


if __name__ == "__main__":
    main()