package config

import (
	"base-go-v2/internal/types"
	"fmt"
	"time"

	"github.com/spf13/viper"
)

// App 全局唯一配置实例
var App *types.AppConfig

// init 初始化默认值
func init() {
	App = &types.AppConfig{
		Server: types.ServerConfig{
			Port: 8080,
		},
		JWT: types.JWTConfig{
			Secret:        "default_secret",
			RefreshExpiry: time.Hour,
			AccessExpiry:  time.Hour,
		},
		Db: types.DbConfig{
			MaxOpenConns:    10,
			MaxIdleConns:    5,
			ConnMaxLifetime: 30 * time.Minute,
		},
		Snowflake: types.SnowflakeConfig{
			DatacenterID: 1,
			WorkerID:     1,
		},
		Log: types.LogConfig{
			Dir:       "logs",
			Level:     "debug",
			Format:    "json",
			Daily:     true,
			MaxDays:   30,
			Caller:    true,
			LevelDirs: true,
			Console:   true,
		},
	}
}

// InitAppConfig 初始化配置
func InitAppConfig(configPath string) error {
	if configPath == "" {
		fmt.Println("⚠️ 使用默认配置")
		return nil
	}

	v := viper.New()
	v.SetConfigFile(configPath)
	v.SetConfigType("yaml")

	if err := v.ReadInConfig(); err != nil {
		return err
	}

	// 逐字段解码，缺失字段保留默认值
	if err := v.UnmarshalKey("server", &App.Server); err != nil {
		return err
	}
	if err := v.UnmarshalKey("jwt", &App.JWT); err != nil {
		return err
	}
	if err := v.UnmarshalKey("snowflake", &App.Snowflake); err != nil {
		return err
	}
	if err := v.UnmarshalKey("db", &App.Db); err != nil {
		return err
	}
	if err := v.UnmarshalKey("log", &App.Log); err != nil {
		return err
	}

	fmt.Printf("✅ 初始化 %s 配置成功\n", configPath)
	return nil
}