"""
Contract tests for cross-switch API endpoints
These tests define the expected behavior - they will FAIL until implementation is complete
"""
import pytest
from httpx import AsyncClient
from fastapi import status


@pytest.mark.asyncio
class TestCrossSwitchExecution:
    """Contract tests for POST /api/v1/crossswitch"""

    async def test_crossswitch_success_operator(self, async_client: AsyncClient, operator_token: str):
        """Test successful cross-switch with operator role"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "monitor_id": 1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()

        # Verify response structure
        assert "success" in data
        assert data["success"] is True
        assert "message" in data
        assert "route" in data

        # Verify route details
        route = data["route"]
        assert route["camera_id"] == 1
        assert route["monitor_id"] == 1
        assert "executed_at" in route
        assert "executed_by" in route

    async def test_crossswitch_success_administrator(self, async_client: AsyncClient, auth_token: str):
        """Test successful cross-switch with administrator role"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 2,
                "monitor_id": 2,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {auth_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()
        assert data["success"] is True

    async def test_crossswitch_forbidden_viewer(self, async_client: AsyncClient, viewer_token: str):
        """Test that viewer role cannot execute cross-switch"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "monitor_id": 1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_403_FORBIDDEN
        data = response.json()
        assert "error" in data or "detail" in data

    async def test_crossswitch_no_auth(self, async_client: AsyncClient):
        """Test cross-switch without authentication"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "monitor_id": 1,
                "mode": 0
            }
        )

        assert response.status_code == status.HTTP_401_UNAUTHORIZED

    async def test_crossswitch_invalid_camera(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with invalid camera ID"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 99999,  # Non-existent camera
                "monitor_id": 1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        # Should return 400 or 404 depending on implementation
        assert response.status_code in [status.HTTP_400_BAD_REQUEST, status.HTTP_404_NOT_FOUND]

    async def test_crossswitch_invalid_monitor(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with invalid monitor ID"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "monitor_id": 99999,  # Non-existent monitor
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code in [status.HTTP_400_BAD_REQUEST, status.HTTP_404_NOT_FOUND]

    async def test_crossswitch_missing_camera_id(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with missing camera_id"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "monitor_id": 1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_422_UNPROCESSABLE_ENTITY

    async def test_crossswitch_missing_monitor_id(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with missing monitor_id"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_422_UNPROCESSABLE_ENTITY

    async def test_crossswitch_negative_ids(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with negative IDs"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": -1,
                "monitor_id": -1,
                "mode": 0
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code in [status.HTTP_400_BAD_REQUEST, status.HTTP_422_UNPROCESSABLE_ENTITY]

    async def test_crossswitch_default_mode(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch with default mode (mode not specified)"""
        response = await async_client.post(
            "/api/v1/crossswitch",
            json={
                "camera_id": 1,
                "monitor_id": 1
            },
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        # Should succeed with default mode=0
        assert response.status_code in [status.HTTP_200_OK, status.HTTP_400_BAD_REQUEST, status.HTTP_404_NOT_FOUND]


@pytest.mark.asyncio
class TestClearMonitor:
    """Contract tests for POST /api/v1/crossswitch/clear"""

    async def test_clear_monitor_success_operator(self, async_client: AsyncClient, operator_token: str):
        """Test successful clear monitor with operator role"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 1},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()

        assert "success" in data
        assert data["success"] is True
        assert "message" in data
        assert "monitor_id" in data
        assert data["monitor_id"] == 1

    async def test_clear_monitor_success_administrator(self, async_client: AsyncClient, auth_token: str):
        """Test successful clear monitor with administrator role"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 2},
            headers={"Authorization": f"Bearer {auth_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()
        assert data["success"] is True

    async def test_clear_monitor_forbidden_viewer(self, async_client: AsyncClient, viewer_token: str):
        """Test that viewer role cannot clear monitor"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 1},
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_403_FORBIDDEN

    async def test_clear_monitor_no_auth(self, async_client: AsyncClient):
        """Test clear monitor without authentication"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 1}
        )

        assert response.status_code == status.HTTP_401_UNAUTHORIZED

    async def test_clear_monitor_invalid_id(self, async_client: AsyncClient, operator_token: str):
        """Test clear monitor with invalid monitor ID"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 99999},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code in [status.HTTP_400_BAD_REQUEST, status.HTTP_404_NOT_FOUND]

    async def test_clear_monitor_missing_id(self, async_client: AsyncClient, operator_token: str):
        """Test clear monitor with missing monitor_id"""
        response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_422_UNPROCESSABLE_ENTITY


@pytest.mark.asyncio
class TestRoutingState:
    """Contract tests for GET /api/v1/crossswitch/routing"""

    async def test_get_routing_state_viewer(self, async_client: AsyncClient, viewer_token: str):
        """Test getting routing state with viewer role"""
        response = await async_client.get(
            "/api/v1/crossswitch/routing",
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()

        # Verify response structure
        assert "routes" in data
        assert isinstance(data["routes"], list)

    async def test_get_routing_state_operator(self, async_client: AsyncClient, operator_token: str):
        """Test getting routing state with operator role"""
        response = await async_client.get(
            "/api/v1/crossswitch/routing",
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()
        assert "routes" in data

    async def test_get_routing_state_no_auth(self, async_client: AsyncClient):
        """Test getting routing state without authentication"""
        response = await async_client.get("/api/v1/crossswitch/routing")

        assert response.status_code == status.HTTP_401_UNAUTHORIZED

    async def test_routing_state_structure(self, async_client: AsyncClient, viewer_token: str):
        """Test routing state response structure"""
        response = await async_client.get(
            "/api/v1/crossswitch/routing",
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()

        # Verify structure
        if data["routes"]:
            route = data["routes"][0]
            assert "monitor_id" in route
            assert "camera_id" in route
            assert "executed_at" in route
            assert "executed_by" in route


@pytest.mark.asyncio
class TestRoutingHistory:
    """Contract tests for GET /api/v1/crossswitch/history"""

    async def test_get_routing_history_viewer(self, async_client: AsyncClient, viewer_token: str):
        """Test getting routing history with viewer role"""
        response = await async_client.get(
            "/api/v1/crossswitch/history",
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()

        assert "history" in data
        assert "total" in data
        assert isinstance(data["history"], list)

    async def test_get_routing_history_pagination(self, async_client: AsyncClient, viewer_token: str):
        """Test routing history with pagination"""
        response = await async_client.get(
            "/api/v1/crossswitch/history?limit=10&offset=0",
            headers={"Authorization": f"Bearer {viewer_token}"}
        )

        assert response.status_code == status.HTTP_200_OK
        data = response.json()
        assert len(data["history"]) <= 10

    async def test_get_routing_history_no_auth(self, async_client: AsyncClient):
        """Test getting routing history without authentication"""
        response = await async_client.get("/api/v1/crossswitch/history")

        assert response.status_code == status.HTTP_401_UNAUTHORIZED


@pytest.mark.asyncio
class TestCrossSwitchIntegration:
    """Integration tests for complete cross-switch workflow"""

    async def test_crossswitch_then_query_state(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch execution followed by state query"""
        # Execute cross-switch
        switch_response = await async_client.post(
            "/api/v1/crossswitch",
            json={"camera_id": 1, "monitor_id": 1, "mode": 0},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        if switch_response.status_code != status.HTTP_200_OK:
            pytest.skip("Cross-switch not available")

        # Query routing state
        state_response = await async_client.get(
            "/api/v1/crossswitch/routing",
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert state_response.status_code == status.HTTP_200_OK
        routes = state_response.json()["routes"]

        # Verify the route exists in state
        assert any(r["monitor_id"] == 1 and r["camera_id"] == 1 for r in routes)

    async def test_crossswitch_then_clear(self, async_client: AsyncClient, operator_token: str):
        """Test cross-switch followed by clear monitor"""
        # Execute cross-switch
        switch_response = await async_client.post(
            "/api/v1/crossswitch",
            json={"camera_id": 1, "monitor_id": 1, "mode": 0},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        if switch_response.status_code != status.HTTP_200_OK:
            pytest.skip("Cross-switch not available")

        # Clear the monitor
        clear_response = await async_client.post(
            "/api/v1/crossswitch/clear",
            json={"monitor_id": 1},
            headers={"Authorization": f"Bearer {operator_token}"}
        )

        assert clear_response.status_code == status.HTTP_200_OK
        assert clear_response.json()["success"] is True
