import json
import logging
from http.server import HTTPServer, BaseHTTPRequestHandler

from handler import EndpointHandler

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# Initialize the handler
handler = EndpointHandler()


class RequestHandler(BaseHTTPRequestHandler):
    def do_POST(self):
        try:
            content_length = int(self.headers['Content-Length'])
            post_data = self.rfile.read(content_length)
            data = json.loads(post_data.decode('utf-8'))
            
            logger.info(f'Received request with {len(data.get("inputs", []))} inputs')
            
            # Process the request
            result = handler(data)
            
            # Send response
            self.send_response(200)
            self.send_header('Content-Type', 'application/json')
            self.end_headers()
            self.wfile.write(json.dumps(result).encode('utf-8'))
            
        except Exception as e:
            logger.error(f'Error processing request: {str(e)}')
            self.send_response(500)
            self.send_header('Content-Type', 'application/json')
            self.end_headers()
            error_response = [{'error': str(e), 'generated_text': ''}]
            self.wfile.write(json.dumps(error_response).encode('utf-8'))
    
    def do_GET(self):
        if self.path == '/health':
            # Trigger initialisation if needed but don't block.
            if not handler.initialized:
                try:
                    handler._initialize_components()
                except Exception as e:
                    logger.error(f'Initialization failed during health check: {str(e)}')

            is_ready = handler.initialized
            health_response = {
                'status': 'healthy' if is_ready else 'unhealthy',
                'model_ready': is_ready
            }

            try:
                self.send_response(200 if is_ready else 503)
                self.send_header('Content-Type', 'application/json')
                self.end_headers()
                self.wfile.write(json.dumps(health_response).encode('utf-8'))
            except BrokenPipeError:
                # Client disconnected before we replied – safe to ignore.
                pass
            return
        else:
            self.send_response(404)
            self.end_headers()

    def log_message(self, format, *args):
        # Suppress default HTTP server logs to keep output clean
        pass


if __name__ == "__main__":
    server = HTTPServer(('0.0.0.0', 80), RequestHandler)
    logger.info('HTTP server started on port 80')
    server.serve_forever()