import os
import sys


def _app_dir():
    if getattr(sys, "frozen", False):
        # PyInstaller onefile: assets read-only nằm trong thư mục giải nén tạm
        return os.path.join(sys._MEIPASS, "app")
    return os.path.dirname(os.path.abspath(__file__))


def _storage_dir():
    if getattr(sys, "frozen", False):
        # Dữ liệu ghi được (DB, uploads, processed) phải ngoài thư mục tạm
        root = os.environ.get("APPDATA") or os.path.expanduser("~")
        return os.path.join(root, "SonicForgeDAW", "storage")
    return os.path.join(_app_dir(), "storage")


class Settings:
    REDIS_URL: str = os.getenv("REDIS_URL", "redis://localhost:6379/0")
    CELERY_BROKER_URL: str = os.getenv("CELERY_BROKER_URL", "redis://localhost:6379/0")
    CELERY_RESULT_BACKEND: str = os.getenv("CELERY_RESULT_BACKEND", "redis://localhost:6379/0")
    
    APP_DIR: str = _app_dir()
    BASE_DIR: str = os.path.dirname(APP_DIR)
    TEMPLATES_DIR: str = os.path.join(APP_DIR, "templates")
    STORAGE_DIR: str = _storage_dir()
    UPLOADS_DIR: str = os.path.join(STORAGE_DIR, "uploads")
    PROCESSED_DIR: str = os.path.join(STORAGE_DIR, "processed")

    # Plugin dirs — người dùng khai báo qua .env / docker-compose (Docker)
    # hoặc qua Plugins Manager (Windows/macOS, lưu theo user).
    VST_DIR: str = os.getenv("VST_DIR", "/opt/daw_engine/vst3")
    SOUNDFONT_DIR: str = os.getenv("SOUNDFONT_DIR", "/opt/daw_engine/soundfonts")

settings = Settings()