<template>
  <div>
    <v-form ref="domUrlForm" @submit.prevent="createRecipe">
      <div>
        <v-card-title class="headline">
          {{ $t("recipe.create-recipe-from-an-image") }}
        </v-card-title>
        <v-card-text>
          <p>{{ $t("recipe.create-recipe-from-an-image-description") }}</p>
          <v-container class="px-0">
            <AppButtonUpload
              class="ml-auto"
              url="none"
              file-name="images"
              accept="image/*"
              :text="uploadedImages.length ? $t('recipe.upload-more-images') : $t('recipe.upload-images')"
              :text-btn="false"
              :post="false"
              :multiple="true"
              @uploaded="uploadImages"
            />
            <div v-if="uploadedImages.length" class="mt-3">
              <p class="my-2">
                {{ $t("recipe.crop-and-rotate-the-image") }}
              </p>
              <v-row>
                <v-col
                  v-for="(imageUrl, index) in uploadedImagesPreviewUrls"
                  :key="index"
                  cols="12"
                  sm="6"
                  lg="4"
                  xl="3"
                >
                  <v-col>
                    <ImageCropper
                      :img="imageUrl"
                      cropper-height="100%"
                      cropper-width="100%"
                      :submitted="loading"
                      class="mt-4 mb-2"
                      @save="(croppedImage) => updateUploadedImage(index, croppedImage)"
                      @delete="clearImage(index)"
                    />

                    <v-btn
                      v-if="uploadedImages.length > 1"
                      :disabled="loading || index === 0"
                      color="primary"
                      @click="() => setCoverImage(index)"
                    >
                      <v-icon start>
                        {{ index === 0 ? $globals.icons.check : $globals.icons.fileImage }}
                      </v-icon>

                      {{ index === 0 ? $t("recipe.cover-image") : $t("recipe.set-as-cover-image") }}
                    </v-btn>
                  </v-col>
                </v-col>
              </v-row>
            </div>
          </v-container>
          <v-checkbox
            v-if="uploadedImages.length"
            v-model="shouldTranslate"
            color="primary"
            hide-details
            :label="$t('recipe.should-translate-description')"
            :disabled="loading"
          />
          <v-checkbox
            v-if="uploadedImages.length"
            v-model="parseRecipe"
            color="primary"
            hide-details
            :label="$t('recipe.parse-recipe-ingredients-after-import')"
            :disabled="loading"
          />
        </v-card-text>
        <v-card-actions v-if="uploadedImages.length">
          <div class="w-100 d-flex flex-column align-center">
            <p style="width: 250px">
              <BaseButton rounded block type="submit" :loading="loading" />
            </p>
            <p v-if="loading" class="mb-0">
              {{
                uploadedImages.length > 1
                  ? $t("recipe.please-wait-images-processing")
                  : $t("recipe.please-wait-image-procesing")
              }}
            </p>
          </div>
        </v-card-actions>
      </div>
    </v-form>
  </div>
</template>

<script lang="ts">
import { useUserApi } from "~/composables/api";
import { alert } from "~/composables/use-toast";
import { useNewRecipeOptions } from "~/composables/use-new-recipe-options";
import type { VForm } from "~/types/auto-forms";

export default defineNuxtComponent({
  setup() {
    const state = reactive({
      loading: false,
    });

    const i18n = useI18n();
    const api = useUserApi();
    const route = useRoute();
    const groupSlug = computed(() => route.params.groupSlug || "");

    const domUrlForm = ref<VForm | null>(null);
    const uploadedImages = ref<(Blob | File)[]>([]);
    const uploadedImageNames = ref<string[]>([]);
    const uploadedImagesPreviewUrls = ref<string[]>([]);
    const shouldTranslate = ref(true);

    const { parseRecipe, navigateToRecipe } = useNewRecipeOptions();

    function uploadImages(files: File[]) {
      uploadedImages.value = [...uploadedImages.value, ...files];
      uploadedImageNames.value = [...uploadedImageNames.value, ...files.map(file => file.name)];
      uploadedImagesPreviewUrls.value = [
        ...uploadedImagesPreviewUrls.value,
        ...files.map(file => URL.createObjectURL(file)),
      ];
    }

    function clearImage(index: number) {
      // Revoke _before_ splicing
      URL.revokeObjectURL(uploadedImagesPreviewUrls.value[index]);

      uploadedImages.value.splice(index, 1);
      uploadedImageNames.value.splice(index, 1);
      uploadedImagesPreviewUrls.value.splice(index, 1);
    }

    async function createRecipe() {
      if (uploadedImages.value.length === 0) {
        return;
      }

      state.loading = true;

      const translateLanguage = shouldTranslate.value ? i18n.locale : undefined;
      const { data, error } = await api.recipes.createOneFromImages(uploadedImages.value, translateLanguage?.value);
      if (error || !data) {
        alert.error(i18n.t("events.something-went-wrong"));
        state.loading = false;
      }
      else {
        navigateToRecipe(data, groupSlug.value, `/g/${groupSlug.value}/r/create/image`);
      }
    }

    function updateUploadedImage(index: number, croppedImage: Blob) {
      uploadedImages.value[index] = croppedImage;
      uploadedImagesPreviewUrls.value[index] = URL.createObjectURL(croppedImage);
    }

    function swapItem(array: any[], i: number, j: number) {
      if (i < 0 || j < 0 || i >= array.length || j >= array.length) {
        return;
      }

      const temp = array[i];
      array[i] = array[j];
      array[j] = temp;
    }

    function swapImages(i: number, j: number) {
      swapItem(uploadedImages.value, i, j);
      swapItem(uploadedImageNames.value, i, j);
      swapItem(uploadedImagesPreviewUrls.value, i, j);
    }

    // Put the intended cover image at the start of the array
    // The backend currently sets the first image as the cover image
    function setCoverImage(index: number) {
      if (index < 0 || index >= uploadedImages.value.length || index === 0) {
        return;
      }

      swapImages(0, index);
    }

    return {
      ...toRefs(state),
      domUrlForm,
      uploadedImages,
      uploadedImagesPreviewUrls,
      shouldTranslate,
      parseRecipe,
      uploadImages,
      clearImage,
      createRecipe,
      updateUploadedImage,
      setCoverImage,
    };
  },
});
</script>
