"""
Test suite for Real-ESRGAN API.

Run with: pytest tests/
"""
import asyncio
import json
import tempfile
from pathlib import Path
from unittest.mock import AsyncMock, Mock, patch

import pytest
from fastapi.testclient import TestClient
from PIL import Image

from app.main import app
from app.services import file_manager, worker

# Test client
client = TestClient(app)


@pytest.fixture
def temp_dir():
    """Create temporary directory for tests."""
    with tempfile.TemporaryDirectory() as tmpdir:
        yield Path(tmpdir)


@pytest.fixture
def test_image(temp_dir):
    """Create a test image."""
    img = Image.new('RGB', (256, 256), color=(73, 109, 137))
    path = temp_dir / 'test.jpg'
    img.save(path)
    return path


class TestHealth:
    def test_health_check(self):
        """Test health check endpoint."""
        response = client.get('/api/v1/health')
        assert response.status_code == 200
        data = response.json()
        assert data['status'] == 'ok'
        assert data['version'] == '1.0.0'
        assert 'uptime_seconds' in data

    def test_liveness(self):
        """Test liveness probe."""
        response = client.get('/api/v1/health/live')
        assert response.status_code == 200
        assert response.json()['alive'] is True


class TestModels:
    def test_list_models(self):
        """Test listing models."""
        response = client.get('/api/v1/models')
        assert response.status_code == 200
        data = response.json()
        assert 'available_models' in data
        assert 'total_models' in data
        assert 'local_models' in data
        assert isinstance(data['available_models'], list)

    def test_models_info(self):
        """Test models directory info."""
        response = client.get('/api/v1/models-info')
        assert response.status_code == 200
        data = response.json()
        assert 'models_directory' in data
        assert 'total_size_mb' in data
        assert 'model_count' in data


class TestSystem:
    def test_system_info(self):
        """Test system information."""
        response = client.get('/api/v1/system')
        assert response.status_code == 200
        data = response.json()
        assert data['status'] == 'ok'
        assert 'cpu_usage_percent' in data
        assert 'memory_usage_percent' in data
        assert 'disk_usage_percent' in data
        assert 'execution_providers' in data

    def test_stats(self):
        """Test statistics endpoint."""
        response = client.get('/api/v1/stats')
        assert response.status_code == 200
        data = response.json()
        assert 'total_requests' in data
        assert 'successful_requests' in data
        assert 'failed_requests' in data


class TestFileManager:
    def test_ensure_directories(self):
        """Test directory creation."""
        with tempfile.TemporaryDirectory() as tmpdir:
            # Mock settings
            with patch('app.services.file_manager.settings.upload_dir', f'{tmpdir}/uploads'):
                with patch('app.services.file_manager.settings.output_dir', f'{tmpdir}/outputs'):
                    file_manager.ensure_directories()
                    assert Path(f'{tmpdir}/uploads').exists()
                    assert Path(f'{tmpdir}/outputs').exists()

    def test_generate_output_path(self):
        """Test output path generation."""
        input_path = '/tmp/test.jpg'
        output_path = file_manager.generate_output_path(input_path)
        assert output_path.endswith('.jpg')
        assert 'upscaled' in output_path

    def test_cleanup_directory(self, temp_dir):
        """Test directory cleanup."""
        test_dir = temp_dir / 'test_cleanup'
        test_dir.mkdir()
        (test_dir / 'file.txt').write_text('test')
        
        assert test_dir.exists()
        file_manager.cleanup_directory(str(test_dir))
        assert not test_dir.exists()


class TestWorker:
    def test_job_creation(self):
        """Test job creation."""
        job = worker.Job(
            job_id='test-id',
            status='queued',
            input_path='/tmp/input.jpg',
            output_path='/tmp/output.jpg',
            model='RealESRGAN_x4plus',
        )
        
        assert job.job_id == 'test-id'
        assert job.status == 'queued'
        assert 'created_at' in job.to_dict()

    def test_job_metadata_save(self, temp_dir):
        """Test job metadata persistence."""
        with patch('app.services.worker.settings.jobs_dir', str(temp_dir)):
            job = worker.Job(
                job_id='test-id',
                status='queued',
                input_path='/tmp/input.jpg',
                output_path='/tmp/output.jpg',
                model='RealESRGAN_x4plus',
            )
            
            job.save_metadata()
            metadata_file = temp_dir / 'test-id' / 'metadata.json'
            assert metadata_file.exists()
            
            data = json.loads(metadata_file.read_text())
            assert data['job_id'] == 'test-id'
            assert data['status'] == 'queued'


class TestJobEndpoints:
    def test_list_jobs(self):
        """Test listing jobs endpoint."""
        response = client.get('/api/v1/jobs')
        assert response.status_code == 200
        data = response.json()
        assert 'total' in data
        assert 'jobs' in data
        assert 'returned' in data

    def test_job_not_found(self):
        """Test requesting non-existent job."""
        response = client.get('/api/v1/jobs/nonexistent-id')
        assert response.status_code == 404


class TestRootEndpoint:
    def test_root(self):
        """Test root endpoint."""
        response = client.get('/')
        assert response.status_code == 200
        data = response.json()
        assert 'name' in data
        assert 'version' in data
        assert 'endpoints' in data


if __name__ == '__main__':
    pytest.main([__file__, '-v'])