"""
Acceptance tests for API Client (fetch_devices).

Tests:
1. API running: fetch_devices() returns list with test_lampe_1, test_lampe_2
2. API down: fetch_devices() returns empty list without crash
"""
import sys
import time
import subprocess
from apps.ui.api_client import fetch_devices


def test_api_running():
    """Test 1: API is running -> fetch_devices() returns devices."""
    print("Test 1: API running")
    print("-" * 60)
    
    devices = fetch_devices("http://localhost:8001")
    
    if not devices:
        print("  ✗ FAILED: Expected devices, got empty list")
        return False
    
    print(f"  ✓ Received {len(devices)} devices")
    
    # Check structure
    for device in devices:
        device_id = device.get("device_id")
        device_type = device.get("type")
        name = device.get("name")
        
        if not device_id:
            print(f"  ✗ FAILED: Device missing 'device_id': {device}")
            return False
        
        if not device_type:
            print(f"  ✗ FAILED: Device missing 'type': {device}")
            return False
        
        if not name:
            print(f"  ✗ FAILED: Device missing 'name': {device}")
            return False
        
        print(f"    • {device_id} (type={device_type}, name={name})")
    
    # Check for expected devices
    device_ids = {d["device_id"] for d in devices}
    expected = {"test_lampe_1", "test_lampe_2"}
    
    if not expected.issubset(device_ids):
        missing = expected - device_ids
        print(f"  ✗ FAILED: Missing devices: {missing}")
        return False
    
    print("  ✓ All expected devices present")
    print()
    return True


def test_api_down():
    """Test 2: API is down -> fetch_devices() returns empty list without crash."""
    print("Test 2: API down (invalid port)")
    print("-" * 60)
    
    try:
        devices = fetch_devices("http://localhost:9999")
        
        if devices != []:
            print(f"  ✗ FAILED: Expected empty list, got {len(devices)} devices")
            return False
        
        print("  ✓ Returns empty list without crash")
        print()
        return True
        
    except Exception as e:
        print(f"  ✗ FAILED: Exception raised: {e}")
        print()
        return False


def test_api_timeout():
    """Test 3: API timeout -> fetch_devices() returns empty list."""
    print("Test 3: API timeout")
    print("-" * 60)
    
    # Use httpbin.org delay endpoint to simulate slow API
    try:
        start = time.time()
        devices = fetch_devices("https://httpbin.org/delay/5")  # 5s delay, but 3s timeout
        elapsed = time.time() - start
        
        if devices != []:
            print(f"  ✗ FAILED: Expected empty list, got {len(devices)} devices")
            return False
        
        if elapsed >= 4.0:
            print(f"  ✗ FAILED: Timeout not enforced (took {elapsed:.1f}s)")
            return False
        
        print(f"  ✓ Returns empty list after timeout ({elapsed:.1f}s)")
        print()
        return True
        
    except Exception as e:
        print(f"  ✗ FAILED: Exception raised: {e}")
        print()
        return False


def main():
    """Run all acceptance tests."""
    print("=" * 60)
    print("Testing API Client (fetch_devices)")
    print("=" * 60)
    print()
    
    # Check if API is running
    print("Prerequisites: Checking if API is running on port 8001...")
    try:
        devices = fetch_devices("http://localhost:8001")
        if devices:
            print(f"✓ API is running ({len(devices)} devices found)")
            print()
        else:
            print("⚠ API might not be running (no devices returned)")
            print("  Start API with: poetry run uvicorn apps.api.main:app --port 8001")
            print()
    except Exception as e:
        print(f"✗ Cannot reach API: {e}")
        print("  Start API with: poetry run uvicorn apps.api.main:app --port 8001")
        print()
        sys.exit(1)
    
    results = []
    
    # Test 1: API running
    results.append(("API running", test_api_running()))
    
    # Test 2: API down
    results.append(("API down", test_api_down()))
    
    # Test 3: Timeout
    results.append(("API timeout", test_api_timeout()))
    
    # Summary
    print("=" * 60)
    passed = sum(1 for _, result in results if result)
    total = len(results)
    print(f"Results: {passed}/{total} tests passed")
    print("=" * 60)
    
    for name, result in results:
        status = "✓" if result else "✗"
        print(f"  {status} {name}")
    
    if passed == total:
        print()
        print("All tests passed!")
        sys.exit(0)
    else:
        print()
        print("Some tests failed.")
        sys.exit(1)


if __name__ == "__main__":
    main()