"""Script execution API endpoints."""

import asyncio
import logging
import subprocess
from typing import Any

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

from ..auth import verify_token
from ..config import settings

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


class ScriptExecuteRequest(BaseModel):
    """Request model for script execution with optional arguments."""

    args: list[str] = Field(default_factory=list, description="Additional arguments")


class ScriptExecuteResponse(BaseModel):
    """Response model for script execution."""

    success: bool
    script: str
    exit_code: int | None = None
    stdout: str = ""
    stderr: str = ""
    error: str | None = None


class ScriptInfo(BaseModel):
    """Information about an available script."""

    name: str
    label: str
    description: str
    icon: str | None = None
    timeout: int


@router.get("/list")
async def list_scripts(_: str = Depends(verify_token)) -> list[ScriptInfo]:
    """List all available scripts.

    Returns:
        List of available scripts with their descriptions
    """
    return [
        ScriptInfo(
            name=name,
            label=config.label or name.replace("_", " ").title(),
            description=config.description,
            icon=config.icon,
            timeout=config.timeout,
        )
        for name, config in settings.scripts.items()
    ]


@router.post("/execute/{script_name}")
async def execute_script(
    script_name: str,
    request: ScriptExecuteRequest | None = None,
    _: str = Depends(verify_token),
) -> ScriptExecuteResponse:
    """Execute a pre-defined script by name.

    Args:
        script_name: Name of the script to execute (must be defined in config)
        request: Optional arguments to pass to the script

    Returns:
        Execution result including stdout, stderr, and exit code
    """
    # Check if script exists
    if script_name not in settings.scripts:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Script '{script_name}' not found. Use /api/scripts/list to see available scripts.",
        )

    script_config = settings.scripts[script_name]
    args = request.args if request else []

    logger.info(f"Executing script: {script_name}")

    try:
        # Build command
        command = script_config.command
        if args:
            # Append arguments to command
            command = f"{command} {' '.join(args)}"

        # Execute in thread pool to not block
        loop = asyncio.get_event_loop()
        result = await loop.run_in_executor(
            None,
            lambda: _run_script(
                command=command,
                timeout=script_config.timeout,
                shell=script_config.shell,
                working_dir=script_config.working_dir,
            ),
        )

        return ScriptExecuteResponse(
            success=result["exit_code"] == 0,
            script=script_name,
            exit_code=result["exit_code"],
            stdout=result["stdout"],
            stderr=result["stderr"],
        )

    except Exception as e:
        logger.error(f"Script execution error: {e}")
        return ScriptExecuteResponse(
            success=False,
            script=script_name,
            error=str(e),
        )


def _run_script(
    command: str,
    timeout: int,
    shell: bool,
    working_dir: str | None,
) -> dict[str, Any]:
    """Run a script synchronously.

    Args:
        command: Command to execute
        timeout: Timeout in seconds
        shell: Whether to run in shell
        working_dir: Working directory

    Returns:
        Dict with exit_code, stdout, stderr
    """
    try:
        result = subprocess.run(
            command,
            shell=shell,
            cwd=working_dir,
            capture_output=True,
            text=True,
            timeout=timeout,
        )
        return {
            "exit_code": result.returncode,
            "stdout": result.stdout[:10000],  # Limit output size
            "stderr": result.stderr[:10000],
        }
    except subprocess.TimeoutExpired:
        return {
            "exit_code": -1,
            "stdout": "",
            "stderr": f"Script timed out after {timeout} seconds",
        }
    except Exception as e:
        return {
            "exit_code": -1,
            "stdout": "",
            "stderr": str(e),
        }