from docker_wrapper import Docker, NoContainersError
from typing import Dict, List
import sys
from dataclasses import dataclass
from enum import Enum, auto


class MenuOption(Enum):
    VIEW = auto()
    START = auto()
    STOP = auto()
    REMOVE = auto()
    MENU = auto()
    QUIT = auto()


@dataclass
class ContainerInfo:
    container_id: str
    image: str
    command: str
    created: str
    status: str
    ports: str
    names: str

    def __str__(self) -> str:
        return (
            f"Container Information:\n"
            f"  CONTAINER ID: {self.container_id}\n"
            f"  IMAGE: {self.image}\n"
            f"  COMMAND: {self.command}\n"
            f"  CREATED: {self.created}\n"
            f"  STATUS: {self.status}\n"
            f"  PORTS: {self.ports}\n"
            f"  NAMES: {self.names}"
        )


class DockerManager:
    def __init__(self):
        self.docker = Docker
        self._menu_options = {
            'view': (MenuOption.VIEW, 'View container info'),
            'start': (MenuOption.START, 'Starts the container'),
            'stop': (MenuOption.STOP, 'Stops the container'),
            'rm': (MenuOption.REMOVE, 'Deletes the container'),
            'menu': (MenuOption.MENU, 'Back to the main menu'),
            'q': (MenuOption.QUIT, 'Quit the application')
        }

    def get_container_info(self, container: str) -> ContainerInfo:
        """
        Retrieves and formats container information.
        
        Args:
            container: Name of the container
            
        Returns:
            ContainerInfo: Structured container information
        """
        info = self.docker.container_info(container)
        return ContainerInfo(
            container_id=info["CONTAINER ID"],
            image=info["IMAGE"],
            command=info["COMMAND"],
            created=info["CREATED"],
            status=info["STATUS"],
            ports=info["PORTS"],
            names=info["NAMES"]
        )

    def display_main_menu(self, containers: List[str]) -> None:
        """Displays the main container selection menu."""
        print('\nSelect the container to manage:')
        for idx, container in enumerate(containers):
            print(f'  {idx} - {container}')
        print('  q - Quit')

    def display_container_menu(self, container: str) -> None:
        """Displays the container management menu."""
        print(f'\nContainer: {container}\nAvailable actions:')
        for cmd, (_, description) in self._menu_options.items():
            if cmd not in ['q']:  # Exclude quit option from container menu
                print(f'  {cmd} - {description}')

    def handle_container_removal(self, container: str) -> bool:
        """
        Handles the container removal process with confirmation.
        
        Returns:
            bool: True if container was removed, False otherwise
        """
        while True:
            confirmation = input(
                f'\nWARNING! This will DELETE {container}!\n'
                f'Are you absolutely sure you want to delete {container}? (y/N): '
            ).lower()

            if confirmation in ['y', 'yes']:
                print('Stopping container...')
                self.docker.stop(container)
                print('Deleting container...')
                self.docker.rm(container)
                print('Container deleted successfully')
                return True
            elif confirmation in ['n', 'no', '']:
                print(f'Operation cancelled, returning to {container} menu...')
                return False
            else:
                print('Invalid input. Please enter y/N')

    def validate_container_selection(self, selection: str, containers: List[str]) -> int:
        """
        Validates the container selection input.
        
        Returns:
            int: Valid container index
        
        Raises:
            ValueError: If selection is invalid
        """
        try:
            index = int(selection)
            if 0 <= index < len(containers):
                return index
            raise ValueError
        except ValueError:
            raise ValueError("Invalid container selection")

    def run(self) -> None:
        """Main application loop."""
        try:
            while True:
                if not self.docker.containers_exist():
                    raise NoContainersError('No containers exist! Please create a container and try again.')

                containers = self.docker.containers()
                self.display_main_menu(containers)
                
                selection = input().strip()
                if selection == 'q':
                    print("\nExiting application...")
                    sys.exit(0)

                try:
                    container_index = self.validate_container_selection(selection, containers)
                except ValueError:
                    print("Invalid selection. Please try again.")
                    continue

                container = containers[container_index]
                
                while True:
                    self.display_container_menu(container)
                    action = input().strip().lower()

                    if action not in self._menu_options:
                        print('Invalid selection. Please try again.')
                        continue

                    option = self._menu_options[action][0]

                    if option == MenuOption.MENU:
                        break
                    elif option == MenuOption.VIEW:
                        print(self.get_container_info(container))
                    elif option == MenuOption.START:
                        print('Starting container...')
                        self.docker.start(container)
                        print('Container started successfully')
                    elif option == MenuOption.STOP:
                        print('Stopping container...')
                        self.docker.stop(container)
                        print('Container stopped successfully')
                    elif option == MenuOption.REMOVE:
                        if self.handle_container_removal(container):
                            break
                    elif option == MenuOption.QUIT:
                        print("\nExiting application...")
                        sys.exit(0)

        except NoContainersError as e:
            print(f'Error: {e}')
            print('No containers found. Exiting...')
            sys.exit(1)
        except KeyboardInterrupt:
            print("\nOperation cancelled by user. Exiting...")
            sys.exit(0)
        except Exception as e:
            print(f"An unexpected error occurred: {e}")
            sys.exit(1)


if __name__ == "__main__":
    manager = DockerManager()
    manager.run()