import os
import yaml

DEFAULT_CONFIG = {
    "recording": {
        "download_path": "/app/data/recordings",
        "max_retries": 5,
        "retry_delay": 5,
    },
    "server": {
        "host": "0.0.0.0",
        "port": 8484,
    },
    "auth": {
        "enabled": False,
        "username": "admin",
        "password": "stream-recorder",
    },
    "ntfy": {
        "url": "",
        "token": "",
        "events": "error",
    },
    "plik": {
        "url": "",
        "api_key": "",
        "ttl": "30d",
    },
    "logging": {
        "level": "INFO",
    },
}


class Config:
    def __init__(self, config_path: str = "/app/data/config.yml"):
        self.config_path = config_path
        self.data = {}
        self.load()

    def load(self):
        self.data = _deep_copy(DEFAULT_CONFIG)
        if os.path.exists(self.config_path):
            with open(self.config_path, "r") as f:
                user_config = yaml.safe_load(f) or {}
            _deep_merge(self.data, user_config)
        else:
            self.save()

    def save(self):
        os.makedirs(os.path.dirname(self.config_path), exist_ok=True)
        with open(self.config_path, "w") as f:
            yaml.dump(self.data, f, default_flow_style=False, allow_unicode=True, sort_keys=False)

    def get(self, *keys, default=None):
        val = self.data
        for key in keys:
            if isinstance(val, dict) and key in val:
                val = val[key]
            else:
                return default
        return val


def _deep_copy(d):
    if isinstance(d, dict):
        return {k: _deep_copy(v) for k, v in d.items()}
    if isinstance(d, list):
        return [_deep_copy(v) for v in d]
    return d


def _deep_merge(base, override):
    for key, value in override.items():
        if key in base and isinstance(base[key], dict) and isinstance(value, dict):
            _deep_merge(base[key], value)
        else:
            base[key] = value