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 BookReadRecordService struct{}

const bookReadRecordDisplaySelect = "brr.*, ch.title AS chapter_title"

func (s *BookReadRecordService) CreateBookReadRecord(item book.BookReadRecord) error {
	if err := validateBookReadRecord(item); err != nil {
		return err
	}
	return global.GVA_DB.Create(&item).Error
}

func (s *BookReadRecordService) DeleteBookReadRecord(item book.BookReadRecord) error {
	return global.GVA_DB.Delete(&item).Error
}

func (s *BookReadRecordService) DeleteBookReadRecordByIds(ids commonReq.IdsReq) error {
	return deleteByIDs[book.BookReadRecord](ids.Ids)
}

func (s *BookReadRecordService) UpdateBookReadRecord(item book.BookReadRecord) error {
	if err := validateBookReadRecord(item); err != nil {
		return err
	}
	return global.GVA_DB.Save(&item).Error
}

func (s *BookReadRecordService) GetBookReadRecord(id uint) (item bookRes.BookReadRecordDisplay, err error) {
	err = bookReadRecordDisplayDB().
		Select(bookReadRecordDisplaySelect).
		Where("brr.id = ?", id).
		Take(&item).Error
	return
}

func (s *BookReadRecordService) GetBookReadRecordInfoList(info bookReq.BookReadRecordSearch) (list []bookRes.BookReadRecordListItem, total int64, err error) {
	db := bookReadRecordDisplayDB()
	if info.MemberUserID != nil {
		db = db.Where("brr.member_user_id = ?", *info.MemberUserID)
	}
	if info.BookID != nil {
		db = db.Where("brr.book_id = ?", *info.BookID)
	}
	err = db.Count(&total).Error
	if err != nil {
		return
	}
	err = db.Select(bookReadRecordDisplaySelect).Scopes(paginate(info.PageInfo)).Order("brr.last_read_at desc, brr.id desc").Scan(&list).Error
	return
}

func bookReadRecordDisplayDB() *gorm.DB {
	return global.GVA_DB.Table("book_read_record AS brr").
		Joins("LEFT JOIN book_chapter AS ch ON ch.id = brr.chapter_id")
}