from pathlib import Path
import sqlite3

import anyio
import pytest
import yaml

from app.db import reset_db_caches
from app.config import get_settings
from app.main import create_app
from scripts.app_db_adopt import APP_BASELINE_REVISION
from scripts.run_migrations import run_all_migrations

PROJECT_ROOT = Path(__file__).resolve().parents[1]


def _read_yaml(path: str) -> dict:
    return yaml.safe_load((PROJECT_ROOT / path).read_text())


async def _run_lifespan(app) -> None:
    async with app.router.lifespan_context(app):
        return None


def _configure_database_env(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> dict[str, Path | str]:
    app_path = tmp_path / "app.db"

    monkeypatch.setenv("APP_DATABASE_URL", f"sqlite:///{app_path}")
    monkeypatch.setenv("AUTH_BOOTSTRAP_USERNAME", "admin")
    monkeypatch.setenv("AUTH_BOOTSTRAP_PASSWORD", "test-password")
    monkeypatch.setenv("AUTH_COOKIE_SECURE_OVERRIDE", "false")
    get_settings.cache_clear()
    reset_db_caches()

    return {
        "app_path": app_path,
        "app_url": f"sqlite:///{app_path}",
    }


def test_compose_uses_migration_job_before_app() -> None:
    compose = _read_yaml("docker-compose.yml")
    override = _read_yaml("docker-compose.override.yml")

    migration_service = compose["services"]["migration"]
    app_service = compose["services"]["app"]

    assert migration_service["command"] == ["python", "-m", "scripts.run_migrations"]
    assert migration_service["restart"] == "no"
    assert app_service["depends_on"]["migration"]["condition"] == "service_completed_successfully"
    assert override["services"]["migration"]["build"] == "."
    assert override["services"]["app"]["build"] == "."


def test_image_defaults_to_uvicorn_only() -> None:
    dockerfile = (PROJECT_ROOT / "Dockerfile").read_text()
    entrypoint = (PROJECT_ROOT / "docker/entrypoint.sh").read_text()

    assert 'CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]' in dockerfile
    assert 'exec "$@"' in entrypoint
    assert "app_db_adopt" not in entrypoint
    assert "location_db_adopt" not in entrypoint
    assert "poo_db_adopt" not in entrypoint


def test_migration_runner_initializes_and_is_idempotent(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    database_urls = _configure_database_env(tmp_path, monkeypatch)

    first_run = run_all_migrations()
    second_run = run_all_migrations()

    assert first_run == {"app": "initialized"}
    assert second_run == {"app": "already_managed"}

    conn = sqlite3.connect(database_urls["app_path"])
    try:
        assert conn.execute("SELECT version_num FROM alembic_version").fetchone()[0] == APP_BASELINE_REVISION
        tables = {
            row[0]
            for row in conn.execute(
                "SELECT name FROM sqlite_master WHERE type = 'table' AND name NOT LIKE 'sqlite_%'"
            ).fetchall()
        }
    finally:
        conn.close()

    assert {
        "auth_users", "auth_sessions", "app_config", "alembic_version", "location", "poo_records"
    } <= tables

    get_settings.cache_clear()
    reset_db_caches()


def test_app_startup_still_fails_closed_without_running_adoption(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    database_urls = _configure_database_env(tmp_path, monkeypatch)
    missing_app_path = database_urls["app_path"]

    app = create_app()
    with pytest.raises(RuntimeError, match="Run 'python scripts/app_db_adopt.py' first"):
        anyio.run(_run_lifespan, app)

    assert not Path(missing_app_path).exists()

    get_settings.cache_clear()
    reset_db_caches()