package routes

import (
	"errors"
	"net/http"
	"strconv"

	"git.artlef.fr/bibliomane/internal/appcontext"
	"git.artlef.fr/bibliomane/internal/dto"
	"git.artlef.fr/bibliomane/internal/i18nresource"
	"git.artlef.fr/bibliomane/internal/model"
	"git.artlef.fr/bibliomane/internal/myvalidator"
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

func PostCollectionBookHandler(ac appcontext.AppContext) {
	collectionId, err := strconv.ParseUint(ac.C.Param("id"), 10, 64)
	if err != nil {
		ac.C.JSON(http.StatusBadRequest, gin.H{"error": err})
		return
	}

	user, err := ac.GetAuthenticatedUser()
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	var collection model.Collection
	err = ac.Db.First(&collection, collectionId).Error
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	if collection.UserID != user.ID {
		err := myvalidator.HttpError{
			StatusCode: http.StatusUnauthorized,
			Err:        errors.New(i18nresource.GetTranslatedMessage(&ac, "Unauthorized")),
		}
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	var collectionBook dto.CollectionBook
	err = ac.C.ShouldBindJSON(&collectionBook)
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	var book model.Book
	err = ac.Db.First(&book, collectionBook.BookID).Error
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	//reorder other items
	q := ac.Db.Model(&model.CollectionItem{})
	q = q.Where("collection_id = ?", collection.ID)
	err = q.UpdateColumn("position", gorm.Expr("position + 1")).Error
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}

	item := model.CollectionItem{Position: 1, BookID: book.ID, CollectionID: collection.ID}
	ac.Db.Save(&item)
	ac.C.String(http.StatusOK, "Success")
}