"""Callback management API endpoints."""

import logging
import re
from typing import Any

from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel, Field

from ..auth import verify_token
from ..config import CallbackConfig, settings
from ..config_manager import config_manager

router = APIRouter(prefix="/api/callbacks", tags=["callbacks"])
logger = logging.getLogger(__name__)


class CallbackInfo(BaseModel):
    """Information about a configured callback."""

    name: str
    command: str
    timeout: int
    working_dir: str | None = None
    shell: bool


class CallbackCreateRequest(BaseModel):
    """Request model for creating or updating a callback."""

    command: str = Field(..., description="Command to execute", min_length=1)
    timeout: int = Field(default=30, description="Execution timeout in seconds", ge=1, le=300)
    working_dir: str | None = Field(default=None, description="Working directory")
    shell: bool = Field(default=True, description="Run command in shell")


def _validate_callback_name(name: str) -> None:
    """Validate callback name.

    Args:
        name: Callback name to validate.

    Raises:
        HTTPException: If name is invalid.
    """
    # All available callback events
    valid_names = {
        "on_play",
        "on_pause",
        "on_stop",
        "on_next",
        "on_previous",
        "on_volume",
        "on_mute",
        "on_seek",
        "on_turn_on",
        "on_turn_off",
        "on_toggle",
    }

    if name not in valid_names:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"Callback name must be one of: {', '.join(sorted(valid_names))}",
        )


@router.get("/list")
async def list_callbacks(_: str = Depends(verify_token)) -> list[CallbackInfo]:
    """List all configured callbacks.

    Returns:
        List of configured callbacks.
    """
    return [
        CallbackInfo(
            name=name,
            command=config.command,
            timeout=config.timeout,
            working_dir=config.working_dir,
            shell=config.shell,
        )
        for name, config in settings.callbacks.items()
    ]


@router.post("/create/{callback_name}")
async def create_callback(
    callback_name: str,
    request: CallbackCreateRequest,
    _: str = Depends(verify_token),
) -> dict[str, Any]:
    """Create a new callback.

    Args:
        callback_name: Callback event name (on_turn_on, on_turn_off, on_toggle).
        request: Callback configuration.

    Returns:
        Success response with callback name.

    Raises:
        HTTPException: If callback already exists or name is invalid.
    """
    # Validate name
    _validate_callback_name(callback_name)

    # Check if callback already exists
    if callback_name in settings.callbacks:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"Callback '{callback_name}' already exists. Use PUT /api/callbacks/update/{callback_name} to update it.",
        )

    # Create callback config
    callback_config = CallbackConfig(**request.model_dump())

    # Add to config file and in-memory
    try:
        config_manager.add_callback(callback_name, callback_config)
    except Exception as e:
        logger.error(f"Failed to add callback '{callback_name}': {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to add callback: {str(e)}",
        )

    logger.info(f"Callback '{callback_name}' created successfully")
    return {"success": True, "callback": callback_name}


@router.put("/update/{callback_name}")
async def update_callback(
    callback_name: str,
    request: CallbackCreateRequest,
    _: str = Depends(verify_token),
) -> dict[str, Any]:
    """Update an existing callback.

    Args:
        callback_name: Callback event name.
        request: Updated callback configuration.

    Returns:
        Success response with callback name.

    Raises:
        HTTPException: If callback does not exist.
    """
    # Validate name
    _validate_callback_name(callback_name)

    # Check if callback exists
    if callback_name not in settings.callbacks:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Callback '{callback_name}' not found. Use POST /api/callbacks/create/{callback_name} to create it.",
        )

    # Create updated callback config
    callback_config = CallbackConfig(**request.model_dump())

    # Update config file and in-memory
    try:
        config_manager.update_callback(callback_name, callback_config)
    except Exception as e:
        logger.error(f"Failed to update callback '{callback_name}': {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to update callback: {str(e)}",
        )

    logger.info(f"Callback '{callback_name}' updated successfully")
    return {"success": True, "callback": callback_name}


@router.delete("/delete/{callback_name}")
async def delete_callback(
    callback_name: str,
    _: str = Depends(verify_token),
) -> dict[str, Any]:
    """Delete a callback.

    Args:
        callback_name: Callback event name.

    Returns:
        Success response with callback name.

    Raises:
        HTTPException: If callback does not exist.
    """
    # Validate name
    _validate_callback_name(callback_name)

    # Check if callback exists
    if callback_name not in settings.callbacks:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Callback '{callback_name}' not found",
        )

    # Delete from config file and in-memory
    try:
        config_manager.delete_callback(callback_name)
    except Exception as e:
        logger.error(f"Failed to delete callback '{callback_name}': {e}")
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"Failed to delete callback: {str(e)}",
        )

    logger.info(f"Callback '{callback_name}' deleted successfully")
    return {"success": True, "callback": callback_name}