package config

import (
	"fmt"
	"github.com/knadh/koanf"
	"github.com/knadh/koanf/parsers/yaml"
	"github.com/knadh/koanf/providers/file"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/zrpc"
)

type (
	KafkaConf struct {
		Addr  []string // 连接地址
		Topic string
	}

	KafkaProducer struct {
		UserCoinNotify KafkaConf // 用户金币变动通知
		RankUpdate     KafkaConf // 排行榜更新通知队列
		RewardPool     KafkaConf // 奖池通知
	}

	// Config 配置
	Config struct {
		zrpc.RpcServerConf
		Log logx.LogConf
		DB  struct {
			DataSource string
		}
		// Kafka 消息队列配置
		Kafka KafkaProducer
	}
)

var k = koanf.New(".")

func MustLoad(filepath string, v interface{}) {
	f := file.Provider(filepath)
	err := f.Watch(func(event interface{}, err error) {
		if err != nil {
			fmt.Printf("配置文件热重载失败: %v\n", err)
			return
		}
		k = koanf.New(".")
		err = loadAndUnmarshal(f, v)

		if err != nil {
			fmt.Printf("配置文件热重载失败: %v\n", err)
			return
		}
		fmt.Printf("重载配置文件: %+v\n", v)
	})
	if err != nil {
		panic(err)
	}
	mustLoadAndUnmarshal(f, v)
}

func loadAndUnmarshal(f *file.File, v interface{}) (err error) {
	err = k.Load(f, yaml.Parser())
	if err != nil {
		return
	}
	err = k.UnmarshalWithConf("", v, koanf.UnmarshalConf{Tag: "cfg"})
	if err != nil {
		return
	}
	return
}

func mustLoadAndUnmarshal(f *file.File, v interface{}) {
	if err := loadAndUnmarshal(f, v); err != nil {
		panic(err)
	}
}