"""
Configuration management utilities.
Handles loading and managing application configuration.
"""

import json
from pathlib import Path

DATA_DIR = Path("data")

def load_config():
    """Load configuration from data/config.json or return defaults."""
    config_file = DATA_DIR / "config.json"
    if config_file.exists():
        try:
            with open(config_file, 'r', encoding='utf-8') as f:
                return json.load(f)
        except (json.JSONDecodeError, FileNotFoundError) as e:
            print(f"Warning: Could not load config.json: {e}")
    
    return get_default_config()

def get_default_config():
    """Get the default configuration."""
    return {
        "download_settings": {
            "format": "best[height<=720][ext=mp4]/best[height<=720]/best[ext=mp4]/best",
            "preferred_resolution": "720p",
            "audio_format": "mp3",
            "audio_quality": "0",
            "subtitle_language": "en",
            "subtitle_format": "srt",
            "write_metadata": False,
            "write_thumbnail": False,
            "write_description": False,
            "write_annotations": False,
            "write_comments": False,
            "write_subtitles": False,
            "embed_metadata": False,
            "add_metadata": False,
            "continue_downloads": True,
            "no_overwrites": True,
            "ignore_errors": True,
            "no_warnings": False
        },
        "folder_structure": {
            "downloads_dir": "downloads",
            "logs_dir": "logs",
            "tracking_file": str(DATA_DIR / "karaoke_tracking.json")
        },
        "logging": {
            "level": "INFO",
            "format": "%(asctime)s - %(levelname)s - %(message)s",
            "include_console": True,
            "include_file": True
        },
        "yt_dlp_path": "downloader/yt-dlp.exe"
    }

def save_config(config):
    """Save configuration to data/config.json."""
    config_file = DATA_DIR / "config.json"
    config_file.parent.mkdir(exist_ok=True)
    
    try:
        with open(config_file, 'w', encoding='utf-8') as f:
            json.dump(config, f, indent=2, ensure_ascii=False)
        return True
    except Exception as e:
        print(f"Error saving config: {e}")
        return False

def update_config(updates):
    """Update configuration with new values."""
    config = load_config()
    config.update(updates)
    return save_config(config)