import webview
import threading
import time
import subprocess
import os
import sys
import signal
import requests
import atexit
from eveai_client.platform.app import create_app


class EveAIClient:
    """Main client class that orchestrates all platform components."""

    def __init__(self):
        """Initialize the EveAI client."""
        self.port = 7001  # Default port
        self.host = "127.0.0.1"  # Only listen on localhost for security
        self.app = create_app()
        self.window = None
        self.server_process = None

        # Register cleanup at exit to ensure server is terminated
        atexit.register(self.cleanup)

    def _run_server(self):
        """Run Gunicorn server in a separate process."""
        # Set environment variables if needed
        env = os.environ.copy()

        # Construct the command
        cmd = [
            "gunicorn",
            "--workers", "1",
            "--threads", "4",
            "--bind", f"{self.host}:{self.port}",
            "--timeout", "120",
            "wsgi:app"
        ]

        # Start the server as a subprocess
        self.server_process = subprocess.Popen(
            cmd,
            env=env,
            stdout=subprocess.PIPE,
            stderr=subprocess.STDOUT,
            universal_newlines=True
        )

        # Log server output
        for line in iter(self.server_process.stdout.readline, ""):
            print(f"[Server] {line.strip()}")

    def _wait_for_server(self, timeout=30):
        """Wait for server to be ready by polling the endpoint."""
        url = f"http://{self.host}:{self.port}/"
        start_time = time.time()

        while time.time() - start_time < timeout:
            try:
                response = requests.get(url, timeout=1)
                if response.status_code == 200:
                    print(f"Server at {url} is ready!")
                    return True
            except requests.RequestException:
                print("Waiting for server to start...")
                time.sleep(1)

        print(f"Server did not start within {timeout} seconds")
        return False

    def _on_window_closing(self):
        """Handle window closing event."""
        print("Window closing, shutting down server...")
        self.cleanup()
        return True  # Allow window to close

    def start(self):
        """Start the EveAI client application."""
        # Start Gunicorn server in a separate thread
        server_thread = threading.Thread(target=self._run_server)
        server_thread.daemon = True
        server_thread.start()

        # Wait for the server to be ready to accept connections
        if not self._wait_for_server():
            print("Failed to start server, exiting...")
            self.cleanup()
            return

        print(f"Starting webview with URL: http://{self.host}:{self.port}")

        # Create and show the main window
        self.window = webview.create_window(
            self.app.config['WINDOW_TITLE'],
            f'http://{self.host}:{self.port}',
            width=self.app.config['WINDOW_WIDTH'],
            height=self.app.config['WINDOW_HEIGHT'],
            min_size=(self.app.config['WINDOW_MIN_WIDTH'], self.app.config['WINDOW_MIN_HEIGHT']),
        )

        # Set window close handler
        self.window.events.closing += self._on_window_closing

        print("Webview window created, starting webview...")
        webview.start(debug=True)
        print("Webview closed.")

    def cleanup(self):
        """Clean up resources before shutdown."""
        # Terminate the server process
        if self.server_process:
            print("Shutting down server...")
            try:
                # Only terminate the specific server process, not its parent
                self.server_process.terminate()

                # Wait for termination with timeout
                try:
                    self.server_process.wait(timeout=5)
                    print("Server process terminated gracefully.")
                except subprocess.TimeoutExpired:
                    print("Server didn't terminate gracefully, forcing kill...")
                    self.server_process.kill()
                    try:
                        self.server_process.wait(timeout=2)
                        print("Server process killed.")
                    except subprocess.TimeoutExpired:
                        print("Failed to kill server process.")

            except Exception as e:
                print(f"Error during server cleanup: {e}")

            self.server_process = None

        # Additional cleanup for any resources, cache, etc.
        print("Cleanup complete.")


def main():
    """Application entry point."""
    client = EveAIClient()
    try:
        client.start()
    finally:
        # This ensures cleanup runs even if start() raises an exception
        client.cleanup()


if __name__ == '__main__':
    main()