package gameKv

import (
	"context"
	"errors"
	"fmt"
	"strings"
	"sync"
	"time"

	"github.com/ayflying/utility_go/pkg"
	"github.com/ayflying/utility_go/service"
	"github.com/ayflying/utility_go/tools"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/os/gctx"
	"github.com/gogf/gf/v2/os/gtime"
	"github.com/gogf/gf/v2/util/gconv"
)

var (
	Name       = "game_kv"
	RunTimeMax *gtime.Time
)

type sGameKv struct {
	Lock sync.Mutex
}

func New() *sGameKv {
	return &sGameKv{}
}

func init() {
	service.RegisterGameKv(New())
}

// SavesV1 方法
//
// @Description: 保存用户KV数据列表。
// @receiver s: sGameKv的实例。
// @return err: 错误信息，如果操作成功，则为nil。
func (s *sGameKv) SavesV1() (err error) {
	var ctx = gctx.New()
	RunTimeMax = gtime.Now().Add(time.Minute * 30)
	g.Log().Debug(ctx, "开始执行游戏kv数据保存")

	err = tools.Redis.RedisScanV2("user:kv:*", func(keys []string) (err error) {
		if gtime.Now().After(RunTimeMax) {
			g.Log().Error(ctx, "kv执行超时了,停止执行！")
			err = errors.New("kv执行超时了,停止执行！")
			return
		}
		if err = s.SavesV2Batch(ctx, keys); err != nil {
			g.Log().Errorf(ctx, "批量保存KV失败: %v", err)
		}
		return
	})

	return
}

// 删除缓存key
func (s *sGameKv) DelCacheKey(ctx context.Context, uid int64) {
	//如果有活跃，跳过删除
	if getBool, _ := pkg.Cache("redis").
		Contains(ctx, fmt.Sprintf("act:update:%d", uid)); getBool {
		return
	}

	cacheKey := fmt.Sprintf("user:kv:%v", uid)
	_, err := g.Redis().Del(ctx, cacheKey)
	if err != nil {
		g.Log().Error(ctx, err)
	}
}

// SavesV2Batch 批量保存游戏KV数据 (优化版)
//
// @Description: 使用批量Redis MGET和批量数据库操作提升性能
// @param ctx context.Context: 上下文对象
// @param cacheKeys []string: 缓存键列表
// @return err error: 返回错误信息
func (s *sGameKv) SavesV2Batch(ctx context.Context, cacheKeys []string) (err error) {
	if len(cacheKeys) == 0 {
		return nil
	}

	type keyInfo struct {
		cacheKey string
		uid      int64
	}

	var keyInfos []keyInfo
	for _, cacheKey := range cacheKeys {
		result := strings.Split(cacheKey, ":")
		if len(result) < 3 {
			continue
		}
		uid := gconv.Int64(result[2])
		if uid == 0 {
			continue
		}

		if getBool, _ := pkg.Cache("redis").Contains(ctx, fmt.Sprintf("act:update:%d", uid)); getBool {
			continue
		}

		keyInfos = append(keyInfos, keyInfo{
			cacheKey: cacheKey,
			uid:      uid,
		})
	}

	if len(keyInfos) == 0 {
		return nil
	}

	redisValues, err := g.Redis().MGet(ctx, cacheKeys...)
	if err != nil {
		g.Log().Errorf(ctx, "批量获取Redis失败: %v", err)
		return err
	}

	type ListData struct {
		Uid int64       `json:"uid"`
		Kv  interface{} `json:"kv"`
	}

	var list []*ListData
	for _, ki := range keyInfos {
		val, ok := redisValues[ki.cacheKey]
		if !ok {
			continue
		}
		var data interface{}
		if val != nil {
			gconv.Scan(val, &data)
		}
		if data == nil {
			continue
		}
		list = append(list, &ListData{
			Uid: ki.uid,
			Kv:  data,
		})
	}

	if len(list) == 0 {
		return nil
	}

	_, err = g.Model(Name).Data(list).Save()
	if err != nil {
		g.Log().Errorf(ctx, "批量保存KV失败: %v", err)
		return err
	}

	for _, v := range list {
		s.DelCacheKey(ctx, v.Uid)
	}

	g.Log().Debugf(ctx, "SavesV2Batch完成: 保存%d条", len(list))
	return nil
}