<template>
	<div
		class="mkw-digitalClock _monospace"
		:class="{ _panel: !widgetProps.transparent }"
		:style="{ fontSize: `${widgetProps.fontSize}em` }"
	>
		<div v-if="widgetProps.showLabel" class="label">{{ tzAbbrev }}</div>
		<div class="time">
			<MkDigitalClock :show-ms="widgetProps.showMs" :offset="tzOffset" />
		</div>
		<div v-if="widgetProps.showLabel" class="label">
			{{ tzOffsetLabel }}
		</div>
	</div>
</template>

<script lang="ts" setup>
import { onUnmounted, ref, watch, computed } from 'vue';
import type { Widget, WidgetComponentExpose } from "./widget";
import {
	WidgetComponentEmits,
	WidgetComponentProps,
	useWidgetPropsManager,
} from "./widget";
import type { GetFormResultType } from "@/scripts/form";
import { timezones } from "@/scripts/timezones";
import MkDigitalClock from "@/components/MkDigitalClock.vue";

const name = "digitalClock";

const widgetPropsDef = {
	transparent: {
		type: "boolean" as const,
		default: false,
	},
	fontSize: {
		type: "number" as const,
		default: 1.5,
		step: 0.1,
	},
	showMs: {
		type: "boolean" as const,
		default: true,
	},
	showLabel: {
		type: "boolean" as const,
		default: true,
	},
	timezone: {
		type: "enum" as const,
		default: null,
		enum: [
			...timezones.map((tz) => ({
				label: tz.name,
				value: tz.name.toLowerCase(),
			})),
			{
				label: "(auto)",
				value: null,
			},
		],
	},
};

type WidgetProps = GetFormResultType<typeof widgetPropsDef>;

// 現時点ではvueの制限によりimportしたtypeをジェネリックに渡せない
// const props = defineProps<WidgetComponentProps<WidgetProps>>();
// const emit = defineEmits<WidgetComponentEmits<WidgetProps>>();
const props = defineProps<{ widget?: Widget<WidgetProps> }>();
const emit = defineEmits<{ (ev: "updateProps", props: WidgetProps) }>();

const { widgetProps, configure } = useWidgetPropsManager(
	name,
	widgetPropsDef,
	props,
	emit,
);

const tzAbbrev = computed(
	() =>
		(widgetProps.timezone === null
			? timezones.find(
					(tz) =>
						tz.name.toLowerCase() ===
						Intl.DateTimeFormat()
							.resolvedOptions()
							.timeZone.toLowerCase(),
			  )?.abbrev
			: timezones.find(
					(tz) => tz.name.toLowerCase() === widgetProps.timezone,
			  )?.abbrev) ?? "?",
);

const tzOffset = computed(() =>
	widgetProps.timezone === null
		? 0 - new Date().getTimezoneOffset()
		: timezones.find((tz) => tz.name.toLowerCase() === widgetProps.timezone)
				?.offset ?? 0,
);

const tzOffsetLabel = computed(
	() =>
		(tzOffset.value >= 0 ? "+" : "-") +
		Math.floor(tzOffset.value / 60)
			.toString()
			.padStart(2, "0") +
		":" +
		(tzOffset.value % 60).toString().padStart(2, "0"),
);

defineExpose<WidgetComponentExpose>({
	name,
	configure,
	id: props.widget ? props.widget.id : null,
});
</script>

<style lang="scss" scoped>
.mkw-digitalClock {
	padding: 16px 0;
	text-align: center;

	> .label {
		font-size: 65%;
		opacity: 0.7;
	}
}
</style>
