package logic

import (
	"context"
	"errors"

	"juwan-backend/app/community/rpc/internal/models/posts"
	"juwan-backend/app/community/rpc/internal/svc"
	"juwan-backend/app/community/rpc/pb"
	"juwan-backend/app/snowflake/rpc/snowflake"

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

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

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

// -----------------------comments-----------------------
func (l *AddCommentsLogic) AddComments(in *pb.AddCommentsReq) (*pb.AddCommentsResp, error) {
	if in.GetPostId() <= 0 {
		return nil, errors.New("postId is required")
	}
	if in.GetAuthorId() <= 0 {
		return nil, errors.New("authorId is required")
	}
	if in.GetContent() == "" {
		return nil, errors.New("content is required")
	}

	exists, err := l.svcCtx.CommunityModelRO.Posts.Query().
		Where(posts.IDEQ(in.GetPostId()), posts.DeletedAtIsNil()).
		Exist(l.ctx)
	if err != nil || !exists {
		return nil, errors.New("post not found")
	}

	idResp, err := l.svcCtx.Snowflake.NextId(l.ctx, &snowflake.NextIdReq{})
	if err != nil {
		return nil, errors.New("create comment id failed")
	}

	_, err = l.svcCtx.CommunityModelRW.Comments.Create().
		SetID(idResp.Id).
		SetPostID(in.GetPostId()).
		SetAuthorID(in.GetAuthorId()).
		SetContent(in.GetContent()).
		Save(l.ctx)
	if err != nil {
		logx.Errorf("addComments err: %v", err)
		return nil, errors.New("add comment failed")
	}

	l.svcCtx.CommunityModelRW.Posts.Update().
		Where(posts.IDEQ(in.GetPostId())).
		AddCommentCount(1).
		Exec(l.ctx)

	return &pb.AddCommentsResp{}, nil
}
