package book

import (
	"github.com/flipped-aurora/gin-vue-admin/server/global"
	"github.com/flipped-aurora/gin-vue-admin/server/model/book"
	bookReq "github.com/flipped-aurora/gin-vue-admin/server/model/book/request"
	bookRes "github.com/flipped-aurora/gin-vue-admin/server/model/book/response"
	commonReq "github.com/flipped-aurora/gin-vue-admin/server/model/common/request"
	"gorm.io/gorm"
)

type BookCommentService struct{}

const bookCommentDisplaySelect = "bc.*, b.title AS book_title, ch.title AS chapter_title"

func (s *BookCommentService) CreateBookComment(item book.BookComment) error {
	if err := validateBookComment(item); err != nil {
		return err
	}
	return global.GVA_DB.Create(&item).Error
}

func (s *BookCommentService) DeleteBookComment(item book.BookComment) error {
	return global.GVA_DB.Delete(&item).Error
}

func (s *BookCommentService) DeleteBookCommentByIds(ids commonReq.IdsReq) error {
	return deleteByIDs[book.BookComment](ids.Ids)
}

func (s *BookCommentService) UpdateBookComment(item book.BookComment) error {
	if err := validateBookComment(item); err != nil {
		return err
	}
	return global.GVA_DB.Save(&item).Error
}

func (s *BookCommentService) GetBookComment(id uint) (item bookRes.BookCommentDisplay, err error) {
	err = bookCommentDisplayDB().
		Select(bookCommentDisplaySelect).
		Where("bc.id = ?", id).
		Take(&item).Error
	return
}

func (s *BookCommentService) GetBookCommentInfoList(info bookReq.BookCommentSearch) (list []bookRes.BookCommentListItem, total int64, err error) {
	db := bookCommentDisplayDB()
	if info.MemberUserID != nil {
		db = db.Where("bc.member_user_id = ?", *info.MemberUserID)
	}
	if info.BookID != nil {
		db = db.Where("bc.book_id = ?", *info.BookID)
	}
	if info.ChapterID != nil {
		db = db.Where("bc.chapter_id = ?", *info.ChapterID)
	}
	if info.CommentStatus != "" {
		db = db.Where("bc.comment_status = ?", info.CommentStatus)
	}
	err = db.Count(&total).Error
	if err != nil {
		return
	}
	err = db.Select(bookCommentDisplaySelect).Scopes(paginate(info.PageInfo)).Order("bc.id desc").Scan(&list).Error
	return
}

func bookCommentDisplayDB() *gorm.DB {
	return global.GVA_DB.Table("book_comment AS bc").
		Joins("LEFT JOIN book AS b ON b.id = bc.book_id").
		Joins("LEFT JOIN book_chapter AS ch ON ch.id = bc.chapter_id")
}