"""Integration test for concurrent anime additions via API endpoint.

This test verifies that the /api/anime/add endpoint can handle
multiple concurrent requests without blocking.
"""
import asyncio

import pytest
from httpx import ASGITransport, AsyncClient

from src.server.fastapi_app import app
from src.server.services.auth_service import auth_service


@pytest.fixture
async def authenticated_client():
    """Create authenticated async client."""
    if not auth_service.is_configured():
        auth_service.setup_master_password("TestPass123!")

    transport = ASGITransport(app=app)
    async with AsyncClient(transport=transport, base_url="http://test") as client:
        # Login to get token
        r = await client.post(
            "/api/auth/login", json={"password": "TestPass123!"}
        )
        if r.status_code == 200:
            token = r.json()["access_token"]
            client.headers["Authorization"] = f"Bearer {token}"
        yield client


@pytest.mark.asyncio
async def test_concurrent_anime_add_requests(authenticated_client):
    """Test that multiple anime add requests can be processed concurrently.
    
    This test sends multiple anime add requests simultaneously and verifies:
    1. All requests return 202 Accepted
    2. All requests complete within a reasonable time (indicating no blocking)
    3. Each anime is added successfully with correct response structure
    """
    # Define multiple anime to add
    anime_list = [
        {"link": "https://aniworld.to/anime/stream/test-anime-1", "name": "Test Anime 1"},
        {"link": "https://aniworld.to/anime/stream/test-anime-2", "name": "Test Anime 2"},
        {"link": "https://aniworld.to/anime/stream/test-anime-3", "name": "Test Anime 3"},
    ]
    
    # Track start time
    import time
    start_time = time.time()
    
    # Send all requests concurrently
    tasks = []
    for anime in anime_list:
        task = authenticated_client.post("/api/anime/add", json=anime)
        tasks.append(task)
    
    # Wait for all responses
    responses = await asyncio.gather(*tasks)
    
    # Calculate total time
    total_time = time.time() - start_time
    
    # Verify all responses
    for i, response in enumerate(responses):
        # All should return 202 or handle existing anime
        assert response.status_code in (202, 200), (
            f"Request {i} failed with status {response.status_code}"
        )
        
        data = response.json()
        
        # Verify response structure
        assert "status" in data
        assert data["status"] in ("success", "exists")
        assert "key" in data
        assert "folder" in data
        assert "loading_status" in data
        assert "loading_progress" in data
    
    # Verify requests completed quickly (indicating non-blocking behavior)
    # With blocking, 3 requests might take 3x the time of a single request
    # With concurrent processing, they should complete in similar time
    assert total_time < 5.0, (
        f"Concurrent requests took {total_time:.2f}s, "
        f"indicating possible blocking issues"
    )
    
    print(f"✓ 3 concurrent anime add requests completed in {total_time:.2f}s")


@pytest.mark.asyncio
async def test_same_anime_concurrent_add(authenticated_client):
    """Test that adding the same anime twice concurrently is handled correctly.
    
    The second request should return 'exists' status rather than creating
    a duplicate entry.
    """
    anime = {"link": "https://aniworld.to/anime/stream/concurrent-test", "name": "Concurrent Test"}
    
    # Send two requests for the same anime concurrently
    task1 = authenticated_client.post("/api/anime/add", json=anime)
    task2 = authenticated_client.post("/api/anime/add", json=anime)
    
    responses = await asyncio.gather(task1, task2)
    
    # At least one should succeed
    statuses = [r.json()["status"] for r in responses]
    assert "success" in statuses or all(s == "exists" for s in statuses), (
        "Expected at least one success or all exists responses"
    )
    
    # Both should have the same key
    keys = [r.json()["key"] for r in responses]
    assert keys[0] == keys[1], "Both responses should have the same key"
    
    print(f"✓ Concurrent same-anime requests handled correctly: {statuses}")