package friend

import (
	"context"
	"go_dreamfactory/comm"
	"go_dreamfactory/lego/sys/log"
	"go_dreamfactory/pb"
	"go_dreamfactory/sys/cache"
	"go_dreamfactory/utils"
)

//好友申请
func (this *ApiComp) Apply(ctx context.Context, session comm.IUserSession, req *pb.FriendApplyReq) (err error) {
	var (
		code   pb.ErrorCode
		self   *pb.Cache_FriendData
		target *pb.Cache_FriendData
		rsp    *pb.FriendApplyRsp
	)

	defer func() {
		utils.TraceFunc(session.GetUserId(), string(this.module.GetType()), Friend_SubType_Apply, req, rsp)
	}()

	defer func() {
		if code == pb.ErrorCode_Success {
			rsp = &pb.FriendApplyRsp{
				UserId:   session.GetUserId(),
				FriendId: req.FriendId,
			}
		}
		session.SendMsg(string(this.module.GetType()), Friend_SubType_Apply, code, rsp)
	}()

	self, err = cache.Defsys.Friend_Get(session.GetUserId())
	if self == nil || err != nil {
		code = pb.ErrorCode_FriendSelfNoData
		return
	}

	target, err = cache.Defsys.Friend_Get(req.FriendId)
	if target == nil || err != nil {
		code = pb.ErrorCode_FriendTargetNoData
		return
	}

	//判断是否是自己
	if req.FriendId == session.GetUserId() {
		code = pb.ErrorCode_FriendNotSelf
		return
	}

	//判断是否超过最大好友数量
	//TODO 最大数从全局配置中获取
	var max int32 = 50
	total := cache.Defsys.Friend_Total(session.GetUserId())
	if total >= max {
		code = pb.ErrorCode_FriendSelfMax
		return
	}

	//判断对方是否也超过最大好友数量
	ttotal := cache.Defsys.Friend_Total(req.FriendId)
	if ttotal >= max {
		code = pb.ErrorCode_FriendTargetMax
		return
	}

	//判断是否是好友
	if _, ok := utils.Find(self.FriendIds, req.FriendId); ok {
		code = pb.ErrorCode_FriendYet
		return
	}

	//判断自己是否在目标用户的申请列表中
	if _, ok := utils.Find(target.ApplyIds, self.UserId); ok {
		code = pb.ErrorCode_FriendApplyYet
		return
	}

	//判断目标用户是否在黑名单中
	if _, ok := utils.Find(self.BlackIds, req.FriendId); ok {
		code = pb.ErrorCode_FriendSelfBlackYet
		return
	}

	//判断是否在对方的黑名单中
	if _, ok := utils.Find(target.BlackIds, self.UserId); ok {
		code = pb.ErrorCode_FriendTargetBlackYet
		return
	}

	//将自己加入到目标用户的申请列表中
	target.ApplyIds = append(target.ApplyIds, self.UserId)
	err = cache.Defsys.Friend_Update(&pb.Cache_FriendData{
		UserId:   req.FriendId,
		ApplyIds: target.ApplyIds,
	})

	if err != nil {
		log.Errorf("firend Apply err:%v", err)
		code = pb.ErrorCode_FriendApplyError
		return
	}

	return
}