<template>
<div :class="[$style.root, { [$style.disabled]: disabled, [$style.checked]: checked }]">
	<input
		ref="input"
		type="checkbox"
		:disabled="disabled"
		:class="$style.input"
		@keydown.enter="toggle"
	>
	<span ref="button" v-tooltip="checked ? i18n.ts.itsOn : i18n.ts.itsOff" :class="$style.button" data-cy-switch-toggle @click.prevent="toggle">
		<div :class="$style.knob"></div>
	</span>
	<span :class="$style.body">
		<!-- TODO: 無名slotの方は廃止 -->
		<span :class="$style.label" @click="toggle"><slot name="label"></slot><slot></slot></span>
		<p :class="$style.caption"><slot name="caption"></slot></p>
	</span>
</div>
</template>

<script lang="ts" setup>
import { toRefs, Ref } from 'vue';
import { i18n } from '@/i18n';

const props = defineProps<{
	modelValue: boolean | Ref<boolean>;
	disabled?: boolean;
}>();

const emit = defineEmits<{
	(ev: 'update:modelValue', v: boolean): void;
}>();

let button = $shallowRef<HTMLElement>();
const checked = toRefs(props).modelValue;
const toggle = () => {
	if (props.disabled) return;
	emit('update:modelValue', !checked.value);

	if (!checked.value) {

	}
};
</script>

<style lang="scss" module>
.root {
	position: relative;
	display: flex;
	transition: all 0.2s ease;
	user-select: none;

	&:hover {
		> .button {
			border-color: var(--inputBorderHover) !important;
		}
	}

	&.disabled {
		opacity: 0.6;
		cursor: not-allowed;
	}

	&.checked {
		> .button {
			background-color: var(--switchOnBg) !important;
			border-color: var(--switchOnBg) !important;

			> .knob {
				left: 12px;
				background: var(--switchOnFg);
			}
		}
	}
}

.input {
	position: absolute;
	width: 0;
	height: 0;
	opacity: 0;
	margin: 0;
}

.button {
	position: relative;
	display: inline-flex;
	flex-shrink: 0;
	margin: 0;
	box-sizing: border-box;
	width: 32px;
	height: 23px;
	outline: none;
	background: var(--switchOffBg);
	background-clip: content-box;
	border: solid 1px var(--switchOffBg);
	border-radius: 999px;
	cursor: pointer;
	transition: inherit;
	user-select: none;
}

.knob {
	position: absolute;
	top: 3px;
	left: 3px;
	width: 15px;
	height: 15px;
	background: var(--switchOffFg);
	border-radius: 999px;
	transition: all 0.2s ease;
}

.body {
	margin-left: 12px;
	margin-top: 2px;
	display: block;
	transition: inherit;
	color: var(--fg);
}

.label {
	display: block;
	line-height: 20px;
	cursor: pointer;
	transition: inherit;
}

.caption {
	margin: 8px 0 0 0;
	color: var(--fgTransparentWeak);
	font-size: 0.85em;

	&:empty {
		display: none;
	}
}
</style>
