package postservicelogic

import (
	"app-cloudep-tweeting-service/internal/domain"
	model "app-cloudep-tweeting-service/internal/model/mongo"
	"context"

	ers "code.30cm.net/digimon/library-go/errs"

	"app-cloudep-tweeting-service/gen_result/pb/tweeting"
	"app-cloudep-tweeting-service/internal/svc"

	"github.com/zeromicro/go-zero/core/logx"
)

type LikeListLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewLikeListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *LikeListLogic {
	return &LikeListLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

// 換句話說就是對這個文章按讚的人的列表

type likeListReq struct {
	Target    string          `json:"target" validate:"required"`
	LikeType  domain.LikeType `json:"like_type" validate:"required,oneof=1 2"`
	PageSize  int64           `json:"page_size" validate:"required"`
	PageIndex int64           `json:"page_index" validate:"required"`
}

// LikeList 取得讚/不讚列表
func (l *LikeListLogic) LikeList(in *tweeting.LikeListReq) (*tweeting.LikeListResp, error) {
	// 驗證資料
	if err := l.svcCtx.Validate.ValidateAll(&likeListReq{
		Target:    in.TargetId,
		LikeType:  domain.LikeType(in.GetLikeType()),
		PageSize:  in.GetPageSize(),
		PageIndex: in.GetPageIndex(),
	}); err != nil {
		return nil, ers.InvalidFormat(err.Error())
	}

	result, total, err := l.svcCtx.PostLikeModel.FindLikeUsers(l.ctx, &model.QueryPostLikeReq{
		Target:    in.GetTargetId(),
		LikeType:  domain.LikeType(in.GetLikeType()),
		PageSize:  in.GetPageSize(),
		PageIndex: in.GetPageIndex(),
	})
	if err != nil {
		e := domain.PostMongoErrorL(
			logx.WithContext(l.ctx),
			[]logx.LogField{
				{Key: "req", Value: in},
				{Key: "func", Value: "PostModel.LikeDislike"},
				{Key: "err", Value: err},
			},
			"failed to like or dislike").Wrap(err)
		return nil, e
	}

	var list = make([]*tweeting.LikeItem, 0, len(result))
	for _, item := range result {
		list = append(list, &tweeting.LikeItem{
			LikeType: int64(item.Type),
			TargetId: item.TargetID,
			Uid:      item.UID,
		})
	}

	return &tweeting.LikeListResp{
		List: list,
		Page: &tweeting.Pager{
			Size:  in.GetPageSize(),
			Index: in.GetPageIndex(),
			Total: total,
		},
	}, nil
}