package config

import (
	"encoding/json"
	"fmt"
	"os"

	"github.com/sirupsen/logrus"
)

type TelegramConfig struct {
	ChannelID int64  `json:"channel_id"`
	Token     string `json:"token"`
}

type LogConfig struct {
	Level logrus.Level
}

type jsonLogConfig struct {
	Level string `json:"level"`
}

type ListenerConfig struct {
	SockPath string `json:"sock_path"`
}

type Config struct {
	Telegram TelegramConfig
	Log      LogConfig
	Listener ListenerConfig
}

type jsonConfig struct {
	Telegram TelegramConfig `json:"telegram"`
	Log      jsonLogConfig  `json:"log"`
	Listener ListenerConfig `json:"listener"`
}

func parseLevel(lvlStr string) logrus.Level {
	for _, lvl := range logrus.AllLevels {
		if lvl.String() == lvlStr {
			return lvl
		}
	}
	return logrus.InfoLevel
}

func New(filepath string) (*Config, error) {
	content, err := os.ReadFile(filepath)
	if err != nil {
		return nil, fmt.Errorf("failed to read config file %q: %w", filepath, err)
	}
	var jsonConf jsonConfig
	if err := json.Unmarshal(content, &jsonConf); err != nil {
		return nil, fmt.Errorf("failed to parse config file: %w", err)
	}
	return &Config{
		Telegram: jsonConf.Telegram,
		Log: LogConfig{
			Level: parseLevel(jsonConf.Log.Level),
		},
		Listener: jsonConf.Listener,
	}, nil
}