<template>
  <div
    class="selector-dropdown | flex flex-col"
    :style="'--image: url(\'' + getFrontViewUrl(currentValue) + '\')'"
  >
    <label for="selector-select" class="text-sm">{{ label }}</label>

    <MultiSelect
      v-if="isCompareModeEnabled"
      id="selector-multiselect"
      v-model="currentValue"
      :options="items"
      optionLabel="title"
      :placeholder="label"
      :maxSelectedLabels="3"
      class="font-serif"
      :class="{ active: currentValue }"
      data-icon="chevron-single-down"
      checkmark
    >
      <template #option="slotProps">
        <img
          alt=""
          :src="getFrontViewUrl(slotProps.option)"
          width="28"
          height="28"
        />
        <p>{{ slotProps.option.title }}</p>
      </template>
    </MultiSelect>

    <Select
      v-else
      id="selector-select"
      v-model="currentValue"
      :options="items"
      optionLabel="title"
      class="font-serif"
      :class="{ active: currentValue }"
      data-icon="chevron-single-down"
      checkmark
    >
      <template #value="slotProps">
        <p v-if="currentValue">
          {{ currentValue.title }}
        </p>
        <p v-else>Selectionnez une déclinaison</p>
      </template>

      <template #option="slotProps">
        <img
          alt=""
          :src="getFrontViewUrl(slotProps.option)"
          width="28"
          height="28"
        />
        <p>{{ slotProps.option.title }}</p>
      </template>
    </Select>
  </div>
</template>

<script setup>
import { onBeforeMount, ref, watch } from 'vue';
import { storeToRefs } from 'pinia';
import { useDialogStore } from '../stores/dialog';

// Props
const { items, label, isCompareModeEnabled, index } = defineProps({
  label: String,
  items: Array,
  isCompareModeEnabled: {
    type: Boolean,
    default: false,
  },
  index: Number,
});

// Variables
const currentValue = ref(null);

// Stores
const { activeTracks } = storeToRefs(useDialogStore());

// Hooks
onBeforeMount(() => {
  if (index === 0) {
    currentValue.value = items[0];
  }
});

// Watchers
watch(
  () => isCompareModeEnabled,
  (newValue) => {
    if (newValue) {
      currentValue.value = currentValue.value ? [currentValue.value] : [];
    }
  }
);

watch(currentValue, (newValue) => {
  if (
    newValue !== null &&
    (Array.isArray(newValue) ? newValue.length > 0 : true)
  ) {
    selectTrack(newValue);
  }
});

watch(
  activeTracks,
  (newValue) => {
    if (!isCompareModeEnabled) return;

    currentValue.value.forEach((item) => {
      if (!newValue.includes(item)) {
        currentValue.value = currentValue.value.filter((el) => el !== item);
      }
    });
  },
  { deep: true }
);

function selectTrack(track) {
  if (!isCompareModeEnabled) {
    activeTracks.value = [track];
    return;
  }

  const lastVariation = track[track.length - 1];

  if (
    activeTracks.value.length === 1 &&
    !activeTracks.value.includes(lastVariation)
  ) {
    activeTracks.value.push(lastVariation);
    return;
  }

  if (activeTracks.value.length === 2) {
    if (activeTracks.value.includes(lastVariation)) {
      removeTrack(track);
    } else {
      activeTracks.value.pop();
      activeTracks.value.push(lastVariation);
    }
  }
}

function removeTrack(track) {
  activeTracks.value = activeTracks.value.filter(
    (activeTrack) => activeTrack.title !== track.title
  );
}

watch(activeTracks, (newValue) => {
  if (newValue[newValue.length - 1] !== currentValue.value) {
    currentValue.value = isCompareModeEnabled ? [] : null;
  }
});

// Functions
function getFrontViewUrl(item) {
  if (!item) return '';
  if (Array.isArray(item)) {
    return item.length > 0 ? getFrontViewUrl(item[0]) : '';
  }
  if (item.files.length > 1) {
    return item.files[7]?.url || item.files[0].url;
  } else {
    return item.files[0].url;
  }
}
</script>

<style>
.selector-dropdown {
  --selector-width: 21rem;
  --row-gap: 0;
  align-items: flex-start;
  position: relative;
  background: var(--color-background);
  border-radius: var(--rounded-lg);
  height: 3.75rem;
  min-width: var(--selector-width, 21rem);
  padding: var(--space-8) var(--space-48) var(--space-8) var(--space-64);
}
.selector-dropdown::before {
  content: '';
  position: absolute;
  left: var(--space-8);
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--rounded-md);
  background-color: var(--dialog-inner-background, #f7f7f7);
  background-image: var(--image);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

[role="combobox"],
[id*="select_list"] {
  border: 1px solid var(--color-grey-200);
}
[role="combobox"]:hover {
  outline: 0px solid var(--color-grey-400);
  border-color: var(--color-grey-400);
}
[role="combobox"][aria-expanded="true"] {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: -2px;
  border-color: transparent;
}
#selector-select,
#selector-multiselect,
[role="combobox"] {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.875rem var(--space-48) var(--space-8) var(--space-64);
  cursor: pointer;
}
[role="combobox"] p {
  max-height: 1lh;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#selector-select.active [role="combobox"] {
  border-color: var(--color-focus-ring);
}

/* Icon */
[data-pc-section="dropdown"] {
  display: none; /* Hide default component svg */
}
.selector-dropdown [data-icon]::before {
  --icon-color: var(--color-grey-700);
  position: absolute;
  right: var(--space-8);
  top: 0.625rem;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.625rem;
}
.selector-dropdown label {
  color: var(--color-grey-700);
  letter-spacing: var(--tracking-wider);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  height: 1lh;
  padding-right: 1em;
}

/* Options */
[id*="select_list"] {
  margin-top: var(--space-4);
  border-radius: var(--rounded-md);
  background: var(--color-background);
  box-shadow: var(--shadow);
  padding: var(--space-8);
}
[id*="select_list"] > * {
  font-family: var(--font-serif);
  padding: var(--space-8) var(--space-8) var(--space-8) var(--space-48);
  border-radius: var(--rounded-sm);
  position: relative;
  display: flex;
  align-items: center;
  height: 2.75rem;
  cursor: pointer;
}
[id*="select_list"] > * + * {
  margin-top: var(--space-4);
}
[id*="select_list"] > *::before {
  content: '';
  position: absolute;
  left: var(--space-8);
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--rounded-sm);
  background-image: var(--image);
  background-color: var(--dialog-inner-background, #f7f7f7);
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}
[id*="select_list"] > *:hover {
  background-color: var(--color-grey-50);
}
[id*="select_list"] > *:focus,
[id*="select_list"] > *:focus-visible,
[id*="select_list"] > [data-p-focused="true"] {
  outline: 2px solid var(--color-focus-ring);
}
/* Check */
#selector-multiselect_list input[type="checkbox"] {
  position: absolute;
  left: var(--space-4);
  top: calc(var(--space-4) + 1px);
  width: 1.75rem;
  height: 1.75rem;
  border-radius: var(--rounded-sm);
}
#selector-multiselect_list input[type="checkbox"]:checked {
  --icon-color: var(--color-focus-ring);
}
[id*="select_list"] > * > svg {
  position: absolute;
  left: 0.875rem;
  width: 1rem;
  height: 1rem;
  color: var(--color-grey-700);
}
[id*="select_list"] img {
  position: absolute;
  left: 0.5rem;
  width: 1.75rem;
  height: 1.75rem;
  mix-blend-mode: multiply;
}
[id*="select_list"] [aria-selected="true"] img,
#selector-multiselect_list input[type="checkbox"] + [data-pc-section="box"] {
  display: none;
}
#selector-multiselect_list [aria-selected="false"] input[type="checkbox"]::before {
  --icon-color: transparent;
}
/* Overlay */
[data-pc-section="overlay"] [data-pc-section="header"] {
  display: none;
}
</style>
