<template>
<MkModal ref="modal" :prefer-type="'dialog'" :z-priority="'high'" @click="done(true)" @closed="emit('closed')">
	<div :class="$style.root">
		<div v-if="icon" :class="$style.icon">
			<i :class="icon"></i>
		</div>
		<div v-else-if="!input && !select" :class="[$style.icon, $style['type_' + type]]">
			<i v-if="type === 'success'" :class="$style.iconInner" class="ti ti-check"></i>
			<i v-else-if="type === 'error'" :class="$style.iconInner" class="ti ti-circle-x"></i>
			<i v-else-if="type === 'warning'" :class="$style.iconInner" class="ti ti-alert-triangle"></i>
			<i v-else-if="type === 'info'" :class="$style.iconInner" class="ti ti-info-circle"></i>
			<i v-else-if="type === 'question'" :class="$style.iconInner" class="ti ti-help-circle"></i>
			<MkLoading v-else-if="type === 'waiting'" :class="$style.iconInner" :em="true"/>
		</div>
		<header v-if="title" :class="$style.title"><Mfm :text="title"/></header>
		<div v-if="text" :class="$style.text"><Mfm :text="text"/></div>
		<MkInput v-if="input" v-model="inputValue" autofocus :type="input.type || 'text'" :placeholder="input.placeholder || undefined" :autocomplete="input.autocomplete" @keydown="onInputKeydown">
			<template v-if="input.type === 'password'" #prefix><i class="ti ti-lock"></i></template>
			<template #caption>
				<span v-if="okButtonDisabled && disabledReason === 'charactersExceeded'" v-text="i18n.t('_dialog.charactersExceeded', { current: (inputValue as string).length, max: input.maxLength ?? 'NaN' })"/>
				<span v-else-if="okButtonDisabled && disabledReason === 'charactersBelow'" v-text="i18n.t('_dialog.charactersBelow', { current: (inputValue as string).length, min: input.minLength ?? 'NaN' })"/>
			</template>
		</MkInput>
		<MkSelect v-if="select" v-model="selectedValue" autofocus>
			<template v-if="select.items">
				<option v-for="item in select.items" :value="item.value">{{ item.text }}</option>
			</template>
			<template v-else>
				<optgroup v-for="groupedItem in select.groupedItems" :label="groupedItem.label">
					<option v-for="item in groupedItem.items" :value="item.value">{{ item.text }}</option>
				</optgroup>
			</template>
		</MkSelect>
		<div v-if="(showOkButton || showCancelButton) && !actions" :class="$style.buttons">
			<MkButton v-if="showOkButton" inline primary rounded :autofocus="!input && !select" :disabled="okButtonDisabled" @click="ok">{{ okText ?? ((showCancelButton || input || select) ? i18n.ts.ok : i18n.ts.gotIt) }}</MkButton>
			<MkButton v-if="showCancelButton || input || select" inline rounded @click="cancel">{{ cancelText ?? i18n.ts.cancel }}</MkButton>
		</div>
		<div v-if="actions" :class="$style.buttons">
			<MkButton v-for="action in actions" :key="action.text" inline rounded :primary="action.primary" :danger="action.danger" @click="() => { action.callback(); modal?.close(); }">{{ action.text }}</MkButton>
		</div>
	</div>
</MkModal>
</template>

<script lang="ts" setup>
import { onBeforeUnmount, onMounted, ref, shallowRef } from 'vue';
import MkModal from '@/components/MkModal.vue';
import MkButton from '@/components/MkButton.vue';
import MkInput from '@/components/MkInput.vue';
import MkSelect from '@/components/MkSelect.vue';
import { i18n } from '@/i18n';

type Input = {
	type: 'text' | 'number' | 'password' | 'email' | 'url' | 'date' | 'time' | 'search' | 'datetime-local';
	placeholder?: string | null;
	autocomplete?: string;
	default: string | number | null;
	minLength?: number;
	maxLength?: number;
};

type Select = {
	items: {
		value: string;
		text: string;
	}[];
	groupedItems: {
		label: string;
		items: {
			value: string;
			text: string;
		}[];
	}[];
	default: string | null;
};

const props = withDefaults(defineProps<{
	type?: 'success' | 'error' | 'warning' | 'info' | 'question' | 'waiting';
	title: string;
	text?: string;
	input?: Input;
	select?: Select;
	icon?: string;
	actions?: {
		text: string;
		primary?: boolean,
		danger?: boolean,
		callback: (...args: any[]) => void;
	}[];
	showOkButton?: boolean;
	showCancelButton?: boolean;
	cancelableByBgClick?: boolean;
	okText?: string;
	cancelText?: string;
}>(), {
	type: 'info',
	showOkButton: true,
	showCancelButton: false,
	cancelableByBgClick: true,
});

const emit = defineEmits<{
	(ev: 'done', v: { canceled: boolean; result: any }): void;
	(ev: 'closed'): void;
}>();

const modal = shallowRef<InstanceType<typeof MkModal>>();

const inputValue = ref<string | number | null>(props.input?.default ?? null);
const selectedValue = ref(props.select?.default ?? null);

let disabledReason = $ref<null | 'charactersExceeded' | 'charactersBelow'>(null);
const okButtonDisabled = $computed<boolean>(() => {
	if (props.input) {
		if (props.input.minLength) {
			if ((inputValue.value || inputValue.value === '') && (inputValue.value as string).length < props.input.minLength) {
				disabledReason = 'charactersBelow';
				return true;
			}
		}
		if (props.input.maxLength) {
			if (inputValue.value && (inputValue.value as string).length > props.input.maxLength) {
				disabledReason = 'charactersExceeded';
				return true;
			}
		}
	}

	return false;
});

function done(canceled: boolean, result?) {
	emit('done', { canceled, result });
	modal.value?.close();
}

async function ok() {
	if (!props.showOkButton) return;

	const result =
		props.input ? inputValue.value :
		props.select ? selectedValue.value :
		true;
	done(false, result);
}

function cancel() {
	done(true);
}
/*
function onBgClick() {
	if (props.cancelableByBgClick) cancel();
}
*/
function onKeydown(evt: KeyboardEvent) {
	if (evt.key === 'Escape') cancel();
}

function onInputKeydown(evt: KeyboardEvent) {
	if (evt.key === 'Enter') {
		evt.preventDefault();
		evt.stopPropagation();
		ok();
	}
}

onMounted(() => {
	document.addEventListener('keydown', onKeydown);
});

onBeforeUnmount(() => {
	document.removeEventListener('keydown', onKeydown);
});
</script>

<style lang="scss" module>
.root {
	position: relative;
	margin: auto;
	padding: 32px;
	min-width: 320px;
	max-width: 480px;
	box-sizing: border-box;
	text-align: center;
	background: var(--panel);
	border-radius: var(--radius);
}

.icon {
	font-size: 24px;

	& + .title {
		margin-top: 8px;
	}
}

.iconInner {
	display: block;
	margin: 0 auto;
}

.type_info {
	color: #55c4dd;
}

.type_success {
	color: var(--success);
}

.type_error {
	color: var(--error);
}

.type_warning {
	color: var(--warn);
}

.title {
	margin: 0 0 8px 0;
	font-weight: bold;
	font-size: 1.1em;

	& + .text {
		margin-top: 8px;
	}
}

.text {
	margin: 16px 0 0 0;
}

.buttons {
	margin-top: 16px;
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	justify-content: center;
}
</style>
