import httpx
import json
from base_api import BaseAPI
from config import Config

app_config = Config()

class RadioAPIClient(BaseAPI):
    """
    A client wrapper for interacting with the Radio App Server API.
    Uses httpx for asynchronous HTTP requests.
    """
    def __init__(self, base_url="http://localhost:5000"):
        """
        Initializes the API client.

        Args:
            base_url (str): The base URL of the server's API (default is http://localhost:5000).
        """
        super().__init__()
        self.base_url = base_url
        # Use an AsyncClient for making asynchronous requests
        self._client = httpx.AsyncClient()

    async def get_systems(self):
        """
        Retrieves a summary list of all available radio systems.

        Returns:
            list: A list of system summaries (e.g., [{"id": "system_1", "name": "..."}]).
        """
        print(f"Fetching systems from {self.base_url}/systems")
        return await self._request("GET", "/systems")

    async def get_system_details(self, system_id: str):
        """
        Retrieves detailed information for a specific system.

        Args:
            system_id (str): The unique ID of the system.

        Returns:
            dict: The system details.

        Raises:
            httpx.HTTPStatusError: If the system is not found (404).
        """
        print(f"Fetching details for system: {system_id} from {self.base_url}/systems/{system_id}")
        return await self._request("GET", f"/systems/{system_id}")

    async def list_clients(self):
        """
        Retrieves a list of currently connected client IDs.

        Returns:
            list: A list of client IDs (strings).
        """
        print(f"Fetching connected clients from {self.base_url}/clients")
        return await self._request("GET", "/clients")

    async def request_token(self):
        """
        Retrieves a discord bot token.

        Returns:
            str: A token for the bot to use
        """
        url = "/bots/request_token"
        print(f"Fetching a token from {self.base_url}{url}")
        return await self._request("POST", url, json={"client_id":app_conf.client_id})

    async def send_command(self, client_id: str, command_name: str, args: list = None):
        """
        Sends a command to a specific client via the server's API.

        Args:
            client_id (str): The ID of the target client.
            command_name (str): The name of the command to execute on the client.
            args (list, optional): A list of arguments for the command. Defaults to None.

        Returns:
            dict: The API response indicating the command status.
        """
        if args is None:
            args = []
        print(f"Sending command '{command_name}' to client {client_id} with args {args} via API")
        return await self._request(
            "POST",
            f"/command/{client_id}/{command_name}",
            json={"args": args} # API expects args in a JSON body
        )

# --- Example Usage ---
async def example_api_usage():
    """Demonstrates how to use the RadioAPIClient."""
    # You can specify a different base_url if your server is elsewhere
    async with RadioAPIClient("http://localhost:5000") as api_client:
        print("\n--- Getting Channels ---")
        try:
            systems_summary = await api_client.get_systems()
            print("Channels Summary:", systems_summary)
        except Exception as e:
            print(f"Error getting systems: {e}")

        print("\n--- Getting Channel Details (system_1) ---")
        try:
            system_details = await api_client.get_system_details("system_1")
            print("Channel 1 Details:", system_details)
        except Exception as e:
            print(f"Error getting system details: {e}")

        print("\n--- Getting Channel Details (non-existent) ---")
        try:
            non_existent_system = await api_client.get_system_details("non_existent_system")
            print("Non-existent Channel Details:", non_existent_system) # This should not print
        except httpx.HTTPStatusError as e:
             print(f"Caught expected error for non-existent system: {e.response.status_code} - {e.response.json()}")
        except Exception as e:
            print(f"Error getting non-existent system details: {e}")


        print("\n--- Listing Connected Clients ---")
        try:
            connected_clients = await api_client.list_clients()
            print("Connected Clients:", connected_clients)

            # --- Sending a Command (Requires a client to be running with a matching ID) ---
            if connected_clients:
                target_client_id = connected_clients[0] # Send to the first connected client
                print(f"\n--- Sending 'print_message' command to {target_client_id} ---")
                try:
                    command_response = await api_client.send_command(
                        target_client_id,
                        "print_message",
                        ["Hello from the API wrapper!"]
                    )
                    print("Command Response:", command_response)
                except Exception as e:
                    print(f"Error sending command: {e}")

                print(f"\n--- Sending 'run_task' command to {target_client_id} ---")
                try:
                    command_response = await api_client.send_command(
                        target_client_id,
                        "run_task",
                        ["api_task_1", 3] # task_id, duration_seconds
                    )
                    print("Command Response:", command_response)
                except Exception as e:
                    print(f"Error sending command: {e}")

            else:
                print("No clients connected to send commands to.")

        except Exception as e:
            print(f"Error listing clients or sending commands: {e}")


if __name__ == "__main__":
    # To run this example:
    # 1. Ensure the server (server.py) is running.
    # 2. Ensure at least one client (client.py) is running.
    # 3. Run this script: python api_client.py
    asyncio.run(example_api_usage())