package member

import (
	"context"
	"time"

	"bsm/full/module/social/group/internal/impl"
	"bsm/full/module/social/group/internal/models"
	pb "bsm/full/module/social/group/pb"
	"git.apinb.com/bsm-sdk/core/errcode"
	"git.apinb.com/bsm-sdk/core/printer"
	"git.apinb.com/bsm-sdk/core/service"
	"git.apinb.com/bsm-sdk/core/utils"
	"git.apinb.com/bsm-sdk/core/vars"
)

// 申请加群
func DoJoin(ctx context.Context, in *pb.DoJoinRequest) (reply *pb.DataStatusReply, err error) {
	auth, err := service.ParseMetaCtx(ctx, nil)
	if err != nil {
		return nil, err
	}
	if in.GetIdentity() == "" {
		return nil, errcode.ErrInvalidArgument
	}

	// 校验群组是否存在
	var group models.GroupBasic
	if err = impl.DBService.Where("identity=?", in.Identity).First(&group).Error; err != nil {
		printer.Error(err.Error())
		return nil, errcode.ErrRecordNotFound
	}

	// 重复入群防护：已是成员直接返回成功
	var memberCnt int64
	if err = impl.DBService.Model(&models.GroupMember{}).
		Where("group_identity=? and passport_id=?", in.Identity, auth.ID).Count(&memberCnt).Error; err != nil {
		printer.Error(err.Error())
		return nil, errcode.ErrDB
	}
	if memberCnt > 0 {
		return &pb.DataStatusReply{Data: vars.OK, Timeseq: time.Now().UnixMilli()}, nil
	}

	// 成员上限校验（MemberLimit 为 0 表示不限）
	if group.MemberLimit > 0 && group.MemberTotal >= group.MemberLimit {
		return nil, errcode.ErrResourceExhausted
	}

	// 是否免验证入群
	enableAnyJoin, err := models.GetGroupEnableAnyJoin(in.Identity)
	if err != nil {
		printer.Error(err.Error())
		return nil, errcode.ErrDB
	}

	var identity string
	if enableAnyJoin {
		// 免验证直接加入群成员
		member := &models.GroupMember{
			GroupID:       group.ID,
			GroupIdentity: in.Identity,
			Role:          ROLE_MEMBER,
		}
		member.Identity = utils.UUID()
		member.PassportID = auth.ID
		member.PassportIdentity = auth.Identity
		if err = impl.DBService.Create(member).Error; err != nil {
			printer.Error(err.Error())
			return nil, errcode.ErrDB
		}
		identity = member.Identity
		// 更新群组表数据统计
		models.UpsetGroupMemberTotal(in.Identity, "+")
	} else {
		// 避免重复提交待处理申请
		var applyCnt int64
		if err = impl.DBService.Model(&models.GroupApply{}).
			Where("group_identity=? and from_id=? and status=?", in.Identity, auth.ID, 0).Count(&applyCnt).Error; err != nil {
			printer.Error(err.Error())
			return nil, errcode.ErrDB
		}
		if applyCnt > 0 {
			return &pb.DataStatusReply{Data: vars.OK, Timeseq: time.Now().UnixMilli()}, nil
		}

		// 写入加群申请表
		apply := &models.GroupApply{
			FromID:        auth.ID,
			FromIdentity:  auth.Identity,
			GroupID:       group.ID,
			GroupIdentity: in.Identity,
			Message:       in.Message,
		}
		apply.Identity = utils.UUID()
		if err = impl.DBService.Create(apply).Error; err != nil {
			printer.Error(err.Error())
			return nil, errcode.ErrDB
		}
		identity = apply.Identity
	}

	return &pb.DataStatusReply{
		Data:    identity,
		Timeseq: time.Now().UnixMilli(),
	}, nil

}