package timelineservicelogic

import (
	"app-cloudep-tweeting-service/internal/domain"
	"app-cloudep-tweeting-service/internal/domain/repository"
	"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 AddPostLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

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

type addPostReq struct {
	UID string `json:"uid" validate:"required"`
}

// AddPost 加入貼文，只管一股腦全塞，這裡會自動判斷
func (l *AddPostLogic) AddPost(in *tweeting.AddPostToTimelineReq) (*tweeting.OKResp, error) {
	// 驗證資料
	if err := l.svcCtx.Validate.ValidateAll(&addPostReq{
		UID: in.GetUid(),
	}); err != nil {
		// 錯誤代碼 05-011-00
		return nil, ers.InvalidFormat(err.Error())
	}

	if len(in.GetPosts()) == 0 {
		// 沒資料，直接 OK
		return &tweeting.OKResp{}, nil
	}

	post := make([]repository.TimelineItem, 0, len(in.GetPosts()))
	for _, item := range in.GetPosts() {
		post = append(post, repository.TimelineItem{
			PostID: item.PostId,
			Score:  item.CreatedAt,
		})
	}

	err := l.svcCtx.TimelineRepo.AddPost(l.ctx, repository.AddPostRequest{
		UID:       in.GetUid(),
		PostItems: post,
	})
	if err != nil {
		// 錯誤代碼 05-021-20
		e := domain.CommentErrorL(
			domain.AddTimeLineErrorCode,
			logx.WithContext(l.ctx),
			[]logx.LogField{
				{Key: "req", Value: in},
				{Key: "func", Value: "TimelineRepo.AddPost"},
				{Key: "err", Value: err},
			},
			"failed to insert timeline repo :", in.GetUid()).Wrap(err)

		return nil, e
	}

	return &tweeting.OKResp{}, nil
}