package routes

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

	"git.artlef.fr/bibliomane/internal/adapter"
	"git.artlef.fr/bibliomane/internal/appcontext"
	"git.artlef.fr/bibliomane/internal/dto"
	"git.artlef.fr/bibliomane/internal/i18nresource"
	"git.artlef.fr/bibliomane/internal/myvalidator"
	"git.artlef.fr/bibliomane/internal/query"
	"github.com/gin-gonic/gin"
)

func GetCollectionHandler(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
	}

	limit, err := ac.GetQueryLimit()
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	offset, err := ac.GetQueryOffset()
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	collectionHeader, err := query.FetchCollectionHeader(ac.Db, uint(collectionId))
	if collectionHeader.UserID != user.ID {
		err := myvalidator.HttpError{
			StatusCode: http.StatusUnauthorized,
			Err:        errors.New(i18nresource.GetTranslatedMessage(&ac, "Unauthorized")),
		}
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	collection := dto.CollectionGet{Name: collectionHeader.Name}
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	itemsQueryResult, err := query.FetchCollectionItems(ac.Db, user.ID, uint(collectionId), limit, offset)
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	items := adapter.CollectionItemsQueryToDto(itemsQueryResult)
	collection.Items = items
	count, err := query.FetchCollectionBooksCount(ac.Db, user.ID, uint(collectionId))
	if err != nil {
		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
		return
	}
	collection.Count = count
	ac.C.JSON(http.StatusOK, collection)
}