package config

import (
	"log"

	"github.com/spf13/viper"
)

type Config struct {
	Server   ServerConfig   `mapstructure:"server"`
	Database DatabaseConfig `mapstructure:"database"`
	JWT      JWTConfig      `mapstructure:"jwt"`
	Log      LogConfig      `mapstructure:"log"`
}

type ServerConfig struct {
	Port string `mapstructure:"port"`
	Mode string `mapstructure:"mode"`
}

type DatabaseConfig struct {
	Driver   string `mapstructure:"driver"`
	Host     string `mapstructure:"host"`
	Port     string `mapstructure:"port"`
	Username string `mapstructure:"username"`
	Password string `mapstructure:"password"`
	Database string `mapstructure:"database"`
	Charset  string `mapstructure:"charset"`
}

type JWTConfig struct {
	Secret string `mapstructure:"secret"`
	Expire int    `mapstructure:"expire"`
}

type LogConfig struct {
	Level string `mapstructure:"level"`
}

func Load() *Config {
	viper.SetConfigName("config")
	viper.SetConfigType("yaml")
	viper.AddConfigPath("./config")
	viper.AddConfigPath(".")

	// 设置默认值
	viper.SetDefault("server.port", "8080")
	viper.SetDefault("server.mode", "debug")
	viper.SetDefault("database.driver", "mysql")
	viper.SetDefault("database.host", "localhost")
	viper.SetDefault("database.port", "3306")
	viper.SetDefault("database.charset", "utf8mb4")
	viper.SetDefault("jwt.secret", "task-track-secret")
	viper.SetDefault("jwt.expire", 24)
	viper.SetDefault("log.level", "info")

	if err := viper.ReadInConfig(); err != nil {
		log.Printf("Warning: Could not read config file: %v", err)
		log.Println("Using default configuration")
	}

	var config Config
	if err := viper.Unmarshal(&config); err != nil {
		log.Fatal("Failed to unmarshal config:", err)
	}

	return &config
}