"""YakPanel - App Store / Software API"""
import asyncio
import os
import shlex
import subprocess

from fastapi import APIRouter, Depends, HTTPException

from app.core.utils import exec_shell_sync
from app.api.auth import get_current_user
from app.models.user import User

router = APIRouter(prefix="/soft", tags=["soft"])

# Curated list of common server software (Debian/Ubuntu package names)
SOFTWARE_LIST = [
    {"id": "nginx", "name": "Nginx", "desc": "Web server", "pkg": "nginx"},
    {"id": "mysql-server", "name": "MySQL Server", "desc": "Database server", "pkg": "mysql-server"},
    {"id": "mariadb-server", "name": "MariaDB", "desc": "Database server", "pkg": "mariadb-server"},
    {"id": "php", "name": "PHP", "desc": "PHP runtime", "pkg": "php"},
    {"id": "php-fpm", "name": "PHP-FPM", "desc": "PHP FastCGI", "pkg": "php-fpm"},
    {"id": "redis-server", "name": "Redis", "desc": "In-memory cache", "pkg": "redis-server"},
    {"id": "postgresql", "name": "PostgreSQL", "desc": "Database server", "pkg": "postgresql"},
    {"id": "mongodb", "name": "MongoDB", "desc": "NoSQL database", "pkg": "mongodb"},
    {"id": "certbot", "name": "Certbot", "desc": "Let's Encrypt SSL", "pkg": "certbot"},
    {"id": "docker", "name": "Docker", "desc": "Container runtime", "pkg": "docker.io"},
    {"id": "nodejs", "name": "Node.js", "desc": "JavaScript runtime", "pkg": "nodejs"},
    {"id": "npm", "name": "npm", "desc": "Node package manager", "pkg": "npm"},
    {"id": "git", "name": "Git", "desc": "Version control", "pkg": "git"},
    {"id": "python3", "name": "Python 3", "desc": "Python runtime", "pkg": "python3"},
]


def _apt_env() -> dict[str, str]:
    env = os.environ.copy()
    env.setdefault("DEBIAN_FRONTEND", "noninteractive")
    env.setdefault("APT_LISTCHANGES_FRONTEND", "none")
    return env


def _run_apt_shell(script: str, timeout: int) -> None:
    """Run apt/dpkg shell snippet; raise HTTPException if command fails."""
    result = subprocess.run(
        script,
        shell=True,
        capture_output=True,
        text=True,
        timeout=timeout,
        env=_apt_env(),
    )
    if result.returncode == 0:
        return
    out = (result.stdout or "").strip()
    err = (result.stderr or "").strip()
    msg = err or out or f"Command failed (exit {result.returncode})"
    raise HTTPException(status_code=500, detail=msg[:4000])


def _check_installed(pkg: str) -> tuple[bool, str]:
    """Check if package is installed. Returns (installed, version_or_error)."""
    out, err = exec_shell_sync(f"dpkg -l {pkg} 2>/dev/null | grep ^ii", timeout=5)
    if out.strip():
        # Parse version from dpkg output: ii  pkg  version  ...
        parts = out.split()
        if len(parts) >= 3:
            return True, parts[2]
    return False, ""


@router.get("/list")
async def soft_list(current_user: User = Depends(get_current_user)):
    """List software with install status"""
    result = []
    for s in SOFTWARE_LIST:
        installed, version = _check_installed(s["pkg"])
        result.append({
            **s,
            "installed": installed,
            "version": version if installed else "",
        })
    return {"software": result}


@router.post("/install/{pkg_id}")
async def soft_install(
    pkg_id: str,
    current_user: User = Depends(get_current_user),
):
    """Install package via apt (requires root)"""
    pkg = next((s["pkg"] for s in SOFTWARE_LIST if s["id"] == pkg_id), None)
    if not pkg:
        raise HTTPException(status_code=404, detail="Package not found")
    quoted = shlex.quote(pkg)
    _run_apt_shell(f"apt-get update -qq && apt-get install -y {quoted}", timeout=600)
    return {"status": True, "msg": "Installed"}


@router.post("/uninstall/{pkg_id}")
async def soft_uninstall(
    pkg_id: str,
    current_user: User = Depends(get_current_user),
):
    """Uninstall package via apt"""
    pkg = next((s["pkg"] for s in SOFTWARE_LIST if s["id"] == pkg_id), None)
    if not pkg:
        raise HTTPException(status_code=404, detail="Package not found")
    quoted = shlex.quote(pkg)
    await asyncio.to_thread(_run_apt_shell, f"apt-get remove -y {quoted}", 180)
    return {"status": True, "msg": "Uninstalled"}