<template>
	<div
		class="selection-container container flex flex-col align-center"
		ref="selectionRef"
	>
		<div class="title">Selection Criteria</div>
		<!-- <img src="@/assets/images/award/bloom_logo.png" class="logo" /> -->
		<div class="sub-title">Evaluation</div>
		<div class="criteria-list flex" ref="criteriaListRef">
			<div
				class="item flex flex-col align-center"
				v-for="item in criteriaList"
				:key="item.name"
			>
				<img :src="item.icon" class="icon" :style="item.style" />
				<div class="name">{{ item.name }}</div>
				<div class="desc">{{ item.desc }}</div>
			</div>
		</div>
	</div>
</template>

<script setup lang="ts">
import { nextTick, onBeforeUnmount, onMounted, ref } from 'vue'
import { gsap } from 'gsap'
import criteria1 from '@/assets/images/award/criteria_1.png'
import criteria2 from '@/assets/images/award/criteria_2.png'
import criteria3 from '@/assets/images/award/criteria_3.png'
import criteria4 from '@/assets/images/award/criteria_4.png'

const criteriaList = ref([
	{
		icon: criteria1,
		name: 'Originality',
		desc: 'Unique perspective and\ninnovative approach to\nfashion design',
		style: { width: '13rem', height: '17rem' }
	},
	{
		icon: criteria2,
		name: 'Creativity',
		desc: 'Artistic vision and exceptional\ndesign excellence',
		style: { width: '16rem', height: '18rem' }
	},
	{
		icon: criteria3,
		name: 'AiDA Integration',
		desc: 'Effective application of\nAiDA functions',
		style: { width: '16rem', height: '18rem' }
	},
	{
		icon: criteria4,
		name: 'Execution',
		desc: 'Quality of presentation and\ntechnical craftsmanship',
		style: { width: '18.8rem', height: '18rem' }
	}
])

const selectionRef = ref<HTMLElement | null>(null)
const criteriaListRef = ref<HTMLElement | null>(null)
const hasPlayedSelectionAnim = ref(false)
let selectionObserver: IntersectionObserver | null = null

const setupSelectionInitialState = () => {
	const items =
		criteriaListRef.value?.querySelectorAll<HTMLElement>('.item') ?? []
	if (items.length) {
		gsap.set(items, {
			opacity: 0,
			scale: 0,
			transformOrigin: '50% 50%'
		})
	}
}

const playSelectionAnimation = () => {
	if (hasPlayedSelectionAnim.value) return
	const items =
		criteriaListRef.value?.querySelectorAll<HTMLElement>('.item') ?? []
	if (!items.length) return

	gsap.to(items, {
		opacity: 1,
		scale: 1,
		duration: 0.6,
		ease: 'back.out(1.6)',
		stagger: 0.3
	})

	hasPlayedSelectionAnim.value = true
	selectionObserver?.disconnect()
}

onMounted(() => {
	nextTick(() => {
		setupSelectionInitialState()
		if ('IntersectionObserver' in window) {
			selectionObserver = new IntersectionObserver(
				(entries) => {
					entries.forEach((entry) => {
						if (entry.isIntersecting) {
							playSelectionAnimation()
						}
					})
				},
				{ threshold: 0.25 }
			)
			if (selectionRef.value) {
				selectionObserver.observe(selectionRef.value)
			}
		} else {
			playSelectionAnimation()
		}
	})
})

onBeforeUnmount(() => {
	selectionObserver?.disconnect()
})
</script>

<style scoped lang="less">
.selection-container {
	background: url('@/assets/images/award/selection_bg.png') no-repeat;
	background-size: 100% 100%;
	padding-top: 9.3rem;
	.title {
		color: #fff;
		font-family: 'PoppinsBold';
		font-weight: 600;
		font-size: 4rem;
	}
	.logo {
		margin: 2.3rem 0 2.3rem;
	}
	.sub-title {
		color: #f95750;
		font-family: 'Popins';
		font-weight: 400;
		font-size: 3rem;
		margin-bottom: 11.8rem;
	}
	.criteria-list {
		column-gap: 6rem;
		.item {
			height: 44rem;
			width: 32.2rem;
			box-sizing: border-box;
			&:nth-of-type(3) {
				background: url('@/assets/images/award/criteria_bg.png') no-repeat;
				background-size: 100% 100%;
			}
			.icon {
				width: 18.8rem;
				height: 18rem;
			}
			.name {
				font-family: 'PoppinsMedium';
				font-weight: 500;
				font-size: 2.8rem;
				color: #fff;
				margin: 2rem 0 5rem;
			}
			.desc {
				font-family: 'Arial';
				font-weight: 400;
				font-size: 2.4rem;
				color: #e0e0e0;
				text-align: center;
				white-space: pre-line;
			}
		}
	}
}
</style>
