<script lang="ts">
import { defineComponent, h, PropType, TransitionGroup } from 'vue';
import MkAd from '@/components/global/ad.vue';
import { i18n } from '@/i18n';
import { defaultStore } from '@/store';

export default defineComponent({
	props: {
		items: {
			type: Array as PropType<{ id: string; createdAt: string; _shouldInsertAd_: boolean; }[]>,
			required: true,
		},
		direction: {
			type: String,
			required: false,
			default: 'down'
		},
		reversed: {
			type: Boolean,
			required: false,
			default: false
		},
		noGap: {
			type: Boolean,
			required: false,
			default: false
		},
		ad: {
			type: Boolean,
			required: false,
			default: false
		},
	},

	setup(props, { slots, expose }) {
		function getDateText(time: string) {
			const date = new Date(time).getDate();
			const month = new Date(time).getMonth() + 1;
			return i18n.t('monthAndDay', {
				month: month.toString(),
				day: date.toString()
			});
		}

		if (props.items.length === 0) return;

		const renderChildren = () => props.items.map((item, i) => {
			if (!slots || !slots.default) return;

			const el = slots.default({
				item: item
			})[0];
			if (el.key == null && item.id) el.key = item.id;

			if (
				i != props.items.length - 1 &&
				new Date(item.createdAt).getDate() != new Date(props.items[i + 1].createdAt).getDate()
			) {
				const separator = h('div', {
					class: 'separator',
					key: item.id + ':separator',
				}, h('p', {
					class: 'date'
				}, [
					h('span', [
						h('i', {
							class: 'fas fa-angle-up icon',
						}),
						getDateText(item.createdAt)
					]),
					h('span', [
						getDateText(props.items[i + 1].createdAt),
						h('i', {
							class: 'fas fa-angle-down icon',
						})
					])
				]));

				return [el, separator];
			} else {
				if (props.ad && item._shouldInsertAd_) {
					return [h(MkAd, {
						class: 'a', // advertiseの意(ブロッカー対策)
						key: item.id + ':ad',
						prefer: ['horizontal', 'horizontal-big'],
					}), el];
				} else {
					return el;
				}
			}
		});

		return () => h(
			defaultStore.state.animation ? TransitionGroup : 'div',
			defaultStore.state.animation ? {
					class: 'sqadhkmv' + (props.noGap ? ' noGap' : ''),
					name: 'list',
					tag: 'div',
					'data-direction': props.direction,
					'data-reversed': props.reversed ? 'true' : 'false',
				} : {
					class: 'sqadhkmv' + (props.noGap ? ' noGap' : ''),
				},
			{ default: renderChildren });
	}
});
</script>

<style lang="scss">
.sqadhkmv {
	> *:empty {
		display: none;
	}

	> *:not(:last-child) {
		margin-bottom: var(--margin);
	}

	> .list-move {
		transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1);
	}

	> .list-enter-active {
		transition: transform 0.7s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.7s cubic-bezier(0.23, 1, 0.32, 1);
	}

	&[data-direction="up"] {
		> .list-enter-from {
			opacity: 0;
			transform: translateY(64px);
		}
	}

	&[data-direction="down"] {
		> .list-enter-from {
			opacity: 0;
			transform: translateY(-64px);
		}
	}

	> .separator {
		text-align: center;

		> .date {
			display: inline-block;
			position: relative;
			margin: 0;
			padding: 0 16px;
			line-height: 32px;
			text-align: center;
			font-size: 12px;
			color: var(--dateLabelFg);

			> span {
				&:first-child {
					margin-right: 8px;

					> .icon {
						margin-right: 8px;
					}
				}

				&:last-child {
					margin-left: 8px;

					> .icon {
						margin-left: 8px;
					}
				}
			}
		}
	}

	&.noGap {
		> * {
			margin: 0 !important;
			border: none;
			border-radius: 0;
			box-shadow: none;

			&:not(:last-child) {
				border-bottom: solid 0.5px var(--divider);
			}
		}
	}
}
</style>
