import os
import sqlite3
import subprocess
from pathlib import Path


def run_alembic(repo: Path, database: Path, *args: str) -> subprocess.CompletedProcess[str]:
    env = os.environ.copy()
    env["DODO_DATABASE_URL"] = f"sqlite+aiosqlite:///{database}"
    return subprocess.run(
        ["uv", "run", "alembic", *args], cwd=repo, env=env, text=True, capture_output=True, check=False
    )


def test_task_completed_at_migration_upgrade_and_downgrade(tmp_path: Path):
    repo = Path(__file__).resolve().parents[1]
    database = tmp_path / "migration.sqlite3"
    assert run_alembic(repo, database, "upgrade", "0017_memos").returncode == 0

    with sqlite3.connect(database) as connection:
        connection.execute(
            "INSERT INTO users (id, username, password_hash, timezone, created_at) VALUES (?, ?, ?, ?, ?)",
            ("00000000-0000-0000-0000-000000000001", "owner", "hash", "Asia/Shanghai", "2026-09-15 00:00:00"),
        )
        connection.execute(
            "INSERT INTO task_lists (id, user_id, folder_id, name, is_inbox, position, created_at, deleted_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
            ("00000000-0000-0000-0000-000000000002", "00000000-0000-0000-0000-000000000001", None, "收集箱", 1, 0, "2026-09-15 00:00:00", None),
        )
        connection.execute(
            "INSERT INTO tasks (id, user_id, list_id, parent_id, title, description, priority, completed, due_at, due_has_time, version, position, created_at, updated_at, deleted_at, external_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
            ("00000000-0000-0000-0000-000000000003", "00000000-0000-0000-0000-000000000001", "00000000-0000-0000-0000-000000000002", None, "已完成任务", "", 0, 1, None, 0, 1, 0, "2026-09-14 00:00:00", "2026-09-15 06:00:00", None, None),
        )
        connection.commit()

    upgraded = run_alembic(repo, database, "upgrade", "0018_task_completed_at")
    assert upgraded.returncode == 0, upgraded.stderr
    with sqlite3.connect(database) as connection:
        columns = {row[1]: row for row in connection.execute("PRAGMA table_info(tasks)")}
        assert "completed_at" in columns
        indexes = {row[1] for row in connection.execute("PRAGMA index_list(tasks)")}
        assert "ix_tasks_completed_at" in indexes
        completed_at = connection.execute("SELECT completed_at FROM tasks WHERE id = ?", ("00000000-0000-0000-0000-000000000003",)).fetchone()
        assert completed_at == ("2026-09-15 06:00:00",)
        sqlite_boolean = connection.execute("SELECT completed IS TRUE FROM tasks WHERE id = ?", ("00000000-0000-0000-0000-000000000003",)).fetchone()
        assert sqlite_boolean == (1,)

    downgraded = run_alembic(repo, database, "downgrade", "0017_memos")
    assert downgraded.returncode == 0, downgraded.stderr
    with sqlite3.connect(database) as connection:
        columns = {row[1]: row for row in connection.execute("PRAGMA table_info(tasks)")}
        assert "completed_at" not in columns