import os
import secrets
from pathlib import Path

BASE_DIR = Path(__file__).parent.resolve()


def env_default(name, default=None):
    return os.environ.get(name, default)


class Config:
    VERSION = (BASE_DIR / 'VERSION').read_text().strip()
    SECRET_KEY = env_default('APP_SECRET_KEY', secrets.token_hex(32))

    ADMIN_PASSWORD = env_default('ADMIN_PASSWORD')

    PUBLIC_BASE_URL = env_default('PUBLIC_BASE_URL', 'http://localhost:5000').rstrip('/')
    INTERNAL_PORT = int(env_default('INTERNAL_PORT', '5000'))

    DATABASE = Path(env_default('DATABASE', str(BASE_DIR / 'data' / 'app.db')))
    UPLOAD_FOLDER = Path(env_default('UPLOAD_FOLDER', str(BASE_DIR / 'uploads')))
    OUTPUT_FOLDER = Path(env_default('OUTPUT_FOLDER', str(BASE_DIR / 'outputs')))

    MAX_UPLOAD_SIZE = 500 * 1024 * 1024  # 500 MB

    VIDEO_WIDTH = 1920
    VIDEO_HEIGHT = 1080
    VIDEO_FPS = 30
    VIDEO_BITRATE = '5000k'
    AUDIO_BITRATE = '192k'
    VIDEO_CODEC = 'libx264'
    AUDIO_CODEC = 'aac'
    OUTPUT_FORMAT = 'mp4'

    YOUTUBE_PRESET = True  # use faststart + yuv420p