<script setup lang="ts" generic="T">
import { DropdownIcon } from '@modrinth/assets'
import type { Ref } from 'vue'
import { computed, ref } from 'vue'

import Checkbox from '../base/Checkbox.vue'
import type { ContentItem } from './ContentListItem.vue'
import ContentListItem from './ContentListItem.vue'

const props = withDefaults(
	defineProps<{
		items: ContentItem<T>[]
		sortColumn: string
		sortAscending: boolean
		updateSort: (column: string) => void
		currentPage: number
	}>(),
	{},
)

const selectionStates: Ref<Record<string, boolean>> = ref({})
const selected: Ref<string[]> = computed(() =>
	Object.keys(selectionStates.value).filter(
		(item) => selectionStates.value[item] && props.items.some((x) => x.filename === item),
	),
)

const allSelected = ref(false)

const model = defineModel<string[]>()

function updateSelection() {
	model.value = selected.value
}

function setSelected(value: boolean) {
	if (value) {
		selectionStates.value = Object.fromEntries(props.items.map((item) => [item.filename, true]))
	} else {
		selectionStates.value = {}
	}
	updateSelection()
}

const paginatedItems = computed(() =>
	props.items.slice((props.currentPage - 1) * 20, props.currentPage * 20),
)
</script>

<template>
	<div class="flex flex-col grid-cols-[min-content,auto,auto,auto,auto]">
		<div
			:class="`${$slots.headers ? 'flex' : 'grid'} grid-cols-[min-content,4fr,3fr,2fr] gap-3 items-center px-2 pt-1 h-10 mb-3 text-contrast font-bold`"
		>
			<Checkbox
				v-model="allSelected"
				class="select-checkbox"
				:indeterminate="selected.length > 0 && selected.length < items.length"
				@update:model-value="setSelected"
			/>
			<slot name="headers">
				<div class="flex items-center gap-2 cursor-pointer" @click="updateSort('Name')">
					Name
					<DropdownIcon
						v-if="sortColumn === 'Name'"
						class="transition-all transform"
						:class="{ 'rotate-180': sortAscending }"
					/>
				</div>
				<div class="flex items-center gap-1 max-w-60 cursor-pointer" @click="updateSort('Updated')">
					Updated
					<DropdownIcon
						v-if="sortColumn === 'Updated'"
						class="transition-all transform"
						:class="{ 'rotate-180': sortAscending }"
					/>
				</div>
				<div class="flex justify-end gap-2">
					<slot name="header-actions" />
				</div>
			</slot>
		</div>
		<div class="bg-bg-raised rounded-xl">
			<ContentListItem
				v-for="(itemRef, index) in paginatedItems"
				:key="itemRef.filename"
				v-model="selectionStates[itemRef.filename]"
				:item="itemRef"
				:last="index === paginatedItems.length - 1"
				class="mb-2"
				@update:model-value="updateSelection"
			>
				<template #actions="{ item }">
					<slot name="actions" :item="item" />
				</template>
			</ContentListItem>
		</div>
	</div>
</template>
