"""Unit tests for the backend.routers.bookings module."""

from datetime import datetime
from typing import Any
from unittest.mock import ANY
from unittest.mock import AsyncMock
from unittest.mock import MagicMock
from unittest.mock import patch

import pytest
from httpx import AsyncClient
from sqlalchemy.exc import NoResultFound
from sqlalchemy.exc import SQLAlchemyError

from backend.models import Booking
from backend.models import BookingList
from backend.models import Room


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_bookings_for_room_success(
    client: AsyncClient, sample_bookings: BookingList, mock_logger: MagicMock
) -> None:
    """Test successful retrieval of all bookings for a room via GET /bookings/room/{room_id}.

    Verifies that the endpoint returns the expected list of bookings with a 200 status.

    Args:
        client: The FastAPI test client for making HTTP requests.
        sample_bookings: The mocked list of bookings to return.
        mock_logger: The mocked logger instance.
    """
    room_id = 1
    with (
        patch(
            "backend.routers.bookings.get_bookings_for_room", new=AsyncMock()
        ) as mock_get_bookings,
        patch(
            "backend.routers.bookings.get_invitees_for_booking", new=AsyncMock()
        ) as mock_get_invitees,
        patch("backend.routers.bookings.get_room", new=AsyncMock()) as mock_get_room,
    ):
        mock_get_bookings.return_value = sample_bookings
        mock_get_invitees.return_value = []
        mock_get_room.return_value = None

        response = await client.get(f"/bookings/room/{room_id}")

        assert response.status_code == 200
        actual = response.json()
        expected: list[dict[str, Any]] = [
            {
                "id": booking.id,
                "room_id": booking.room_id,
                "start_time": booking.start_time.strftime("%Y-%m-%dT%H:%M:%S.%fZ"),
                "end_time": booking.end_time.strftime("%Y-%m-%dT%H:%M:%S.%fZ"),
                "title": booking.title,
                "invitees": [],
            }
            for booking in sample_bookings
        ]
        # Remove 'room' key if present
        for item in actual:
            item.pop("room", None)
        assert actual == expected
    mock_get_bookings.assert_called_once_with(ANY, room_id, None)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_bookings_for_room_empty(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test retrieval of bookings when none exist for a room via GET /bookings/room/{room_id}.

    Verifies that the endpoint returns an empty list with a 200 status.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    room_id = 1
    with patch(
        "backend.routers.bookings.get_bookings_for_room", new=AsyncMock()
    ) as mock_get_bookings:
        mock_get_bookings.return_value = []

        response = await client.get(f"/bookings/room/{room_id}")

        assert response.status_code == 200
        assert response.json() == []
    mock_get_bookings.assert_called_once_with(ANY, room_id, None)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_bookings_for_room_database_error(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of database errors in GET /bookings/room/{room_id}.

    Verifies that the endpoint returns a 500 status on database failure.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    room_id = 1
    with patch(
        "backend.routers.bookings.get_bookings_for_room", new=AsyncMock()
    ) as mock_get_bookings:
        mock_get_bookings.side_effect = SQLAlchemyError()

        response = await client.get(f"/bookings/room/{room_id}")

        assert response.status_code == 500
        assert "detail" in response.json()
    mock_get_bookings.assert_called_once_with(ANY, room_id, None)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_booking_success(
    client: AsyncClient, sample_room: Room, mock_logger: MagicMock
) -> None:
    """Test successful retrieval of a booking by ID via GET /bookings/{booking_id}.

    Verifies that the endpoint returns the correct booking with a 200 status.

    Args:
        client: The FastAPI test client for making HTTP requests.
        sample_room: The mocked room object.
        mock_logger: The mocked logger instance.
    """
    booking_id = 1
    booking = Booking(
        room_id=1,
        start_time=datetime.fromisoformat("2025-08-25T10:00:00"),
        end_time=datetime.fromisoformat("2025-08-25T11:00:00"),
    )
    booking.id = booking_id
    booking.room = sample_room  # Attach room relationship
    with (
        patch(
            "backend.routers.bookings.get_booking", new=AsyncMock()
        ) as mock_get_booking,
        patch(
            "backend.routers.bookings.get_invitees_for_booking", new=AsyncMock()
        ) as mock_get_invitees,
        patch("backend.routers.bookings.get_room", new=AsyncMock()) as mock_get_room,
    ):
        mock_get_booking.return_value = booking
        mock_get_invitees.return_value = []
        mock_get_room.return_value = sample_room

        response = await client.get(f"/bookings/{booking_id}")

        assert response.status_code == 200
        actual = response.json()
        actual.pop("room", None)
        assert actual == {
            "id": booking_id,
            "room_id": 1,
            "start_time": "2025-08-25T10:00:00",
            "end_time": "2025-08-25T11:00:00",
            "title": None,
            "invitees": [],
        }
        mock_get_booking.assert_called_once_with(ANY, booking_id)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_booking_not_found(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of non-existent booking in GET /bookings/{booking_id}.

    Verifies that the endpoint returns a 404 status when the booking is not found.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 999
    with patch(
        "backend.routers.bookings.get_booking", new=AsyncMock()
    ) as mock_get_booking:
        mock_get_booking.side_effect = NoResultFound()

        response = await client.get(f"/bookings/{booking_id}")

        assert response.status_code == 404
        assert "detail" in response.json()
        mock_get_booking.assert_called_once_with(ANY, booking_id)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_get_booking_database_error(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of database errors in GET /bookings/{booking_id}.

    Verifies that the endpoint returns a 500 status on database failure.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 1
    with patch(
        "backend.routers.bookings.get_booking", new=AsyncMock()
    ) as mock_get_booking:
        mock_get_booking.side_effect = SQLAlchemyError()

        response = await client.get(f"/bookings/{booking_id}")

        assert response.status_code == 500
        assert "detail" in response.json()
        mock_get_booking.assert_called_once_with(ANY, booking_id)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_create_booking_success(
    client: AsyncClient, sample_room: Room, mock_logger: MagicMock
) -> None:
    """Test successful creation of a new booking via POST /bookings/.

    Verifies that the endpoint returns the created booking with a 201 status.

    Args:
        client: The FastAPI test client for making HTTP requests.
        sample_room: The mocked room object.
        mock_logger: The mocked logger instance.
    """
    booking_data: dict[str, Any] = {
        "room_id": 1,
        "start_time": "2025-08-25T10:00:00",
        "end_time": "2025-08-25T11:00:00",
        "title": "Test Booking Title",
    }
    created_booking = Booking(**booking_data)
    created_booking.id = 3
    created_booking.room = sample_room  # Attach room relationship
    with (
        patch(
            "backend.routers.bookings.new_booking", new=AsyncMock()
        ) as mock_new_booking,
        patch(
            "backend.routers.bookings.get_invitees_for_booking", new=AsyncMock()
        ) as mock_get_invitees,
        patch("backend.routers.bookings.get_room", new=AsyncMock()) as mock_get_room,
    ):
        mock_new_booking.return_value = created_booking
        mock_get_invitees.return_value = []
        mock_get_room.return_value = sample_room

        response = await client.post("/bookings/", json=booking_data)

        assert response.status_code == 201
        actual = response.json()
        actual.pop("room", None)
        assert actual == {
            "id": 3,
            "room_id": 1,
            "start_time": "2025-08-25T10:00:00",
            "end_time": "2025-08-25T11:00:00",
            "title": "Test Booking Title",
            "invitees": [],
        }
        mock_new_booking.assert_called_once()


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_create_booking_database_error(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of database errors in POST /bookings/.

    Verifies that the endpoint returns a 500 status on database failure.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_data: dict[str, Any] = {
        "room_id": 1,
        "start_time": "2025-08-25T10:00:00",
        "end_time": "2025-08-25T11:00:00",
    }

    async def raise_sqlalchemy_error(*args, **kwargs):  # type: ignore
        raise SQLAlchemyError()

    with (
        patch(
            "backend.routers.bookings.new_booking",
            new=AsyncMock(side_effect=raise_sqlalchemy_error),
        ) as mock_new_booking,
        patch(
            "backend.routers.bookings.get_invitees_for_booking",
            new=AsyncMock(return_value=[]),
        ),
        patch("backend.routers.bookings.get_room", new=AsyncMock(return_value=None)),
    ):
        response = await client.post("/bookings/", json=booking_data)
        assert response.status_code == 500
        assert "detail" in response.json()
        mock_new_booking.assert_called_once()


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_update_booking_success(
    client: AsyncClient, sample_room: Room, mock_logger: MagicMock
) -> None:
    """Test successful update of a booking via PUT /bookings/{booking_id}.

    Verifies that the endpoint returns the updated booking with a 200 status.

    Args:
        client: The FastAPI test client for making HTTP requests.
        sample_room: The mocked room object.
        mock_logger: The mocked logger instance.
    """
    booking_id = 1
    update_data: dict[str, Any] = {
        "room_id": 2,
        "start_time": "2025-08-25T14:00:00",
        "end_time": "2025-08-25T15:00:00",
        "title": "Updated Test Booking Title",
    }
    updated_booking = Booking(**update_data)
    updated_booking.id = booking_id
    updated_booking.room = sample_room  # Attach room relationship
    with (
        patch(
            "backend.routers.bookings.update_booking", new=AsyncMock()
        ) as mock_update_booking,
        patch(
            "backend.routers.bookings.get_invitees_for_booking", new=AsyncMock()
        ) as mock_get_invitees,
        patch("backend.routers.bookings.get_room", new=AsyncMock()) as mock_get_room,
    ):
        mock_update_booking.return_value = updated_booking
        mock_get_invitees.return_value = []
        mock_get_room.return_value = sample_room

        response = await client.put(f"/bookings/{booking_id}", json=update_data)

        assert response.status_code == 200
        actual = response.json()
        actual.pop("room", None)
        assert actual == {
            "id": booking_id,
            "room_id": 2,
            "start_time": "2025-08-25T14:00:00",
            "end_time": "2025-08-25T15:00:00",
            "title": "Updated Test Booking Title",
            "invitees": [],
        }
        update_data["start_time"] = datetime.fromisoformat(update_data["start_time"])
        update_data["end_time"] = datetime.fromisoformat(update_data["end_time"])
        mock_update_booking.assert_called_once_with(ANY, booking_id, ANY, **update_data)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_update_booking_not_found(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of non-existent booking in PUT /bookings/{booking_id}.

    Verifies that the endpoint returns a 404 status when the booking is not found.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 999
    update_data: dict[str, Any] = {
        "room_id": 2,
        "start_time": "2025-08-25T14:00:00",
        "end_time": "2025-08-25T15:00:00",
        "title": "Updated Test Booking Title",
    }
    with patch(
        "backend.routers.bookings.update_booking", new=AsyncMock()
    ) as mock_update_booking:
        mock_update_booking.side_effect = NoResultFound()

        response = await client.put(f"/bookings/{booking_id}", json=update_data)

        assert response.status_code == 404
        assert "detail" in response.json()
        update_data["start_time"] = datetime.fromisoformat(update_data["start_time"])
        update_data["end_time"] = datetime.fromisoformat(update_data["end_time"])
        mock_update_booking.assert_called_once_with(ANY, booking_id, ANY, **update_data)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_update_booking_database_error(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of database errors in PUT /bookings/{booking_id}.

    Verifies that the endpoint returns a 500 status on database failure.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 1
    update_data: dict[str, Any] = {
        "room_id": 2,
        "start_time": "2025-08-25T14:00:00",
        "end_time": "2025-08-25T15:00:00",
    }

    async def raise_sqlalchemy_error(*args, **kwargs):  # type: ignore
        raise SQLAlchemyError()

    with (
        patch(
            "backend.routers.bookings.update_booking",
            new=AsyncMock(side_effect=raise_sqlalchemy_error),
        ) as mock_update_booking,
        patch(
            "backend.routers.bookings.get_invitees_for_booking",
            new=AsyncMock(return_value=[]),
        ),
        patch("backend.routers.bookings.get_room", new=AsyncMock(return_value=None)),
    ):
        response = await client.put(f"/bookings/{booking_id}", json=update_data)
        assert response.status_code == 500
        assert "detail" in response.json()
        mock_update_booking.assert_called_once()


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_delete_booking_not_found(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of non-existent booking in DELETE /bookings/{booking_id}.

    Verifies that the endpoint returns a 404 status when the booking is not found.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 999
    with patch(
        "backend.routers.bookings.delete_booking", new=AsyncMock()
    ) as mock_delete_booking:
        mock_delete_booking.side_effect = NoResultFound()

        response = await client.delete(f"/bookings/{booking_id}")

        assert response.status_code == 404
        assert "detail" in response.json()
        mock_delete_booking.assert_called_once_with(ANY, booking_id, ANY)


@pytest.mark.asyncio
@pytest.mark.parametrize("mock_logger", ["backend.routers.bookings"], indirect=True)
async def test_delete_booking_database_error(
    client: AsyncClient, mock_logger: MagicMock
) -> None:
    """Test handling of database errors in DELETE /bookings/{booking_id}.

    Verifies that the endpoint returns a 500 status on database failure.

    Args:
        client: The FastAPI test client for making HTTP requests.
        mock_logger: The mocked logger instance.
    """
    booking_id = 1
    with patch(
        "backend.routers.bookings.delete_booking", new=AsyncMock()
    ) as mock_delete_booking:
        mock_delete_booking.side_effect = SQLAlchemyError()

        response = await client.delete(f"/bookings/{booking_id}")

        assert response.status_code == 500
        assert "detail" in response.json()
        mock_delete_booking.assert_called_once_with(ANY, booking_id, ANY)