import os
import platform
from fastapi import APIRouter, Depends
from pydantic import BaseModel
from typing import Optional
from app.core.vst_scanner import NativePluginScanner
from app.api.v1.auth import get_current_user

router = APIRouter()

# Thư mục mặc định theo OS (spec desktop VST 2026-08-08)
DEFAULT_PLUGIN_DIRS = {
    "Linux": ["/opt/daw_engine/vst3", os.path.expanduser("~/.vst3")],
    "Windows": [os.path.expandvars(r"%ProgramFiles%\Common Files\VST3")],
    "Darwin": ["/Library/Audio/Plug-Ins/Components", os.path.expanduser("~/Library/Audio/Plug-Ins/Components")],
}


class PluginScanRequest(BaseModel):
    custom_directories: Optional[list] = None
    scan_formats: Optional[list] = None
    force_rescan: Optional[bool] = False


@router.post("/plugins/scan")
async def scan_desktop_plugins(req: PluginScanRequest, current_user: dict = Depends(get_current_user)):
    """Quét VST3/AU từ thư mục custom — spec: POST /api/v1/desktop/plugins/scan."""
    os_name = platform.system()
    dirs = req.custom_directories or DEFAULT_PLUGIN_DIRS.get(os_name, ["/opt/daw_engine/vst3"])
    if isinstance(dirs, str):
        dirs = [dirs]
    scanner = NativePluginScanner()
    plugins = scanner.scan_directories(dirs)
    return {
        "status": "success",
        "os": os_name,
        "scanned_directories": dirs,
        "total_found": len(plugins),
        "plugins": plugins,
    }