<template>
<form class="qlvuhzng _formRoot" autocomplete="new-password" @submit.prevent="onSubmit">
	<MkInput v-if="instance.disableRegistration" v-model="invitationCode" class="_formBlock" type="text" :spellcheck="false" required>
		<template #label>{{ i18n.ts.invitationCode }}</template>
		<template #prefix><i class="fas fa-key"></i></template>
	</MkInput>
	<MkInput v-model="username" class="_formBlock" type="text" pattern="^[a-zA-Z0-9_]{1,20}$" :spellcheck="false" required data-cy-signup-username @update:modelValue="onChangeUsername">
		<template #label>{{ i18n.ts.username }} <div v-tooltip:dialog="i18n.ts.usernameInfo" class="_button _help"><i class="far fa-question-circle"></i></div></template>
		<template #prefix>@</template>
		<template #suffix>@{{ host }}</template>
		<template #caption>
			<span v-if="usernameState === 'wait'" style="color:#999"><i class="fas fa-spinner fa-pulse fa-fw"></i> {{ i18n.ts.checking }}</span>
			<span v-else-if="usernameState === 'ok'" style="color: var(--success)"><i class="fas fa-check fa-fw"></i> {{ i18n.ts.available }}</span>
			<span v-else-if="usernameState === 'unavailable'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.unavailable }}</span>
			<span v-else-if="usernameState === 'error'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.error }}</span>
			<span v-else-if="usernameState === 'invalid-format'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.usernameInvalidFormat }}</span>
			<span v-else-if="usernameState === 'min-range'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.tooShort }}</span>
			<span v-else-if="usernameState === 'max-range'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.tooLong }}</span>
		</template>
	</MkInput>
	<MkInput v-if="instance.emailRequiredForSignup" v-model="email" class="_formBlock" :debounce="true" type="email" :spellcheck="false" required data-cy-signup-email @update:modelValue="onChangeEmail">
		<template #label>{{ i18n.ts.emailAddress }} <div v-tooltip:dialog="i18n.ts._signup.emailAddressInfo" class="_button _help"><i class="far fa-question-circle"></i></div></template>
		<template #prefix><i class="fas fa-envelope"></i></template>
		<template #caption>
			<span v-if="emailState === 'wait'" style="color:#999"><i class="fas fa-spinner fa-pulse fa-fw"></i> {{ i18n.ts.checking }}</span>
			<span v-else-if="emailState === 'ok'" style="color: var(--success)"><i class="fas fa-check fa-fw"></i> {{ i18n.ts.available }}</span>
			<span v-else-if="emailState === 'unavailable:used'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts._emailUnavailable.used }}</span>
			<span v-else-if="emailState === 'unavailable:format'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts._emailUnavailable.format }}</span>
			<span v-else-if="emailState === 'unavailable:disposable'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts._emailUnavailable.disposable }}</span>
			<span v-else-if="emailState === 'unavailable:mx'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts._emailUnavailable.mx }}</span>
			<span v-else-if="emailState === 'unavailable:smtp'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts._emailUnavailable.smtp }}</span>
			<span v-else-if="emailState === 'unavailable'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.unavailable }}</span>
			<span v-else-if="emailState === 'error'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.error }}</span>
		</template>
	</MkInput>
	<MkInput v-model="password" class="_formBlock" type="password" autocomplete="new-password" required data-cy-signup-password @update:modelValue="onChangePassword">
		<template #label>{{ i18n.ts.password }}</template>
		<template #prefix><i class="fas fa-lock"></i></template>
		<template #caption>
			<span v-if="passwordStrength == 'low'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.weakPassword }}</span>
			<span v-if="passwordStrength == 'medium'" style="color: var(--warn)"><i class="fas fa-check fa-fw"></i> {{ i18n.ts.normalPassword }}</span>
			<span v-if="passwordStrength == 'high'" style="color: var(--success)"><i class="fas fa-check fa-fw"></i> {{ i18n.ts.strongPassword }}</span>
		</template>
	</MkInput>
	<MkInput v-model="retypedPassword" class="_formBlock" type="password" autocomplete="new-password" required data-cy-signup-password-retype @update:modelValue="onChangePasswordRetype">
		<template #label>{{ i18n.ts.password }} ({{ i18n.ts.retype }})</template>
		<template #prefix><i class="fas fa-lock"></i></template>
		<template #caption>
			<span v-if="passwordRetypeState == 'match'" style="color: var(--success)"><i class="fas fa-check fa-fw"></i> {{ i18n.ts.passwordMatched }}</span>
			<span v-if="passwordRetypeState == 'not-match'" style="color: var(--error)"><i class="fas fa-exclamation-triangle fa-fw"></i> {{ i18n.ts.passwordNotMatched }}</span>
		</template>
	</MkInput>
	<MkSwitch v-if="instance.tosUrl" v-model="ToSAgreement" class="_formBlock tou">
		<I18n :src="i18n.ts.agreeTo">
			<template #0>
				<a :href="instance.tosUrl" class="_link" target="_blank">{{ i18n.ts.tos }}</a>
			</template>
		</I18n>
	</MkSwitch>
	<MkCaptcha v-if="instance.enableHcaptcha" ref="hcaptcha" v-model="hCaptchaResponse" class="_formBlock captcha" provider="hcaptcha" :sitekey="instance.hcaptchaSiteKey"/>
	<MkCaptcha v-if="instance.enableRecaptcha" ref="recaptcha" v-model="reCaptchaResponse" class="_formBlock captcha" provider="recaptcha" :sitekey="instance.recaptchaSiteKey"/>
	<MkButton class="_formBlock" type="submit" :disabled="shouldDisableSubmitting" gradate data-cy-signup-submit>{{ i18n.ts.start }}</MkButton>
</form>
</template>

<script lang="ts" setup>
import { } from 'vue';
import getPasswordStrength from 'syuilo-password-strength';
import { toUnicode } from 'punycode/';
import MkButton from './ui/button.vue';
import MkInput from './form/input.vue';
import MkSwitch from './form/switch.vue';
import MkCaptcha from '@/components/MkCaptcha.vue';
import * as config from '@/config';
import * as os from '@/os';
import { login } from '@/account';
import { instance } from '@/instance';
import { i18n } from '@/i18n';

const props = withDefaults(defineProps<{
	autoSet?: boolean;
}>(), {
	autoSet: false,
});

const emit = defineEmits<{
	(ev: 'signup', user: Record<string, any>): void;
	(ev: 'signupEmailPending'): void;
}>();

const host = toUnicode(config.host);

let hcaptcha = $ref();
let recaptcha = $ref();

let username: string = $ref('');
let password: string = $ref('');
let retypedPassword: string = $ref('');
let invitationCode: string = $ref('');
let email = $ref('');
let usernameState: null | 'wait' | 'ok' | 'unavailable' | 'error' | 'invalid-format' | 'min-range' | 'max-range' = $ref(null);
let emailState: null | 'wait' | 'ok' | 'unavailable:used' | 'unavailable:format' | 'unavailable:disposable' | 'unavailable:mx' | 'unavailable:smtp' | 'unavailable' | 'error' = $ref(null);
let passwordStrength: '' | 'low' | 'medium' | 'high' = $ref('');
let passwordRetypeState: null | 'match' | 'not-match' = $ref(null);
let submitting: boolean = $ref(false);
let ToSAgreement: boolean = $ref(false);
let hCaptchaResponse = $ref(null);
let reCaptchaResponse = $ref(null);

const shouldDisableSubmitting = $computed((): boolean => {
	return submitting ||
		instance.tosUrl && !ToSAgreement ||
		instance.enableHcaptcha && !hCaptchaResponse ||
		instance.enableRecaptcha && !reCaptchaResponse ||
		passwordRetypeState === 'not-match';
});

function onChangeUsername(): void {
	if (username === '') {
		usernameState = null;
		return;
	}

	{
		const err =
			!username.match(/^[a-zA-Z0-9_]+$/) ? 'invalid-format' :
			username.length < 1 ? 'min-range' :
			username.length > 20 ? 'max-range' :
			null;

		if (err) {
			usernameState = err;
			return;
		}
	}

	usernameState = 'wait';

	os.api('username/available', {
		username,
	}).then(result => {
		usernameState = result.available ? 'ok' : 'unavailable';
	}).catch(() => {
		usernameState = 'error';
	});
}

function onChangeEmail(): void {
	if (email === '') {
		emailState = null;
		return;
	}

	emailState = 'wait';

	os.api('email-address/available', {
		emailAddress: email,
	}).then(result => {
		emailState = result.available ? 'ok' :
			result.reason === 'used' ? 'unavailable:used' :
			result.reason === 'format' ? 'unavailable:format' :
			result.reason === 'disposable' ? 'unavailable:disposable' :
			result.reason === 'mx' ? 'unavailable:mx' :
			result.reason === 'smtp' ? 'unavailable:smtp' :
			'unavailable';
	}).catch(() => {
		emailState = 'error';
	});
}

function onChangePassword(): void {
	if (password === '') {
		passwordStrength = '';
		return;
	}

	const strength = getPasswordStrength(password);
	passwordStrength = strength > 0.7 ? 'high' : strength > 0.3 ? 'medium' : 'low';
}

function onChangePasswordRetype(): void {
	if (retypedPassword === '') {
		passwordRetypeState = null;
		return;
	}

	passwordRetypeState = password === retypedPassword ? 'match' : 'not-match';
}

function onSubmit(): void {
	if (submitting) return;
	submitting = true;

	os.api('signup', {
		username,
		password,
		emailAddress: email,
		invitationCode,
		'hcaptcha-response': hCaptchaResponse,
		'g-recaptcha-response': reCaptchaResponse,
	}).then(() => {
		if (instance.emailRequiredForSignup) {
			os.alert({
				type: 'success',
				title: i18n.ts._signup.almostThere,
				text: i18n.t('_signup.emailSent', { email }),
			});
			emit('signupEmailPending');
		} else {
			os.api('signin', {
				username,
				password,
			}).then(res => {
				emit('signup', res);

				if (props.autoSet) {
					login(res.i);
				}
			});
		}
	}).catch(() => {
		submitting = false;
		hcaptcha.reset?.();
		recaptcha.reset?.();

		os.alert({
			type: 'error',
			text: i18n.ts.somethingHappened,
		});
	});
}
</script>

<style lang="scss" scoped>
.qlvuhzng {
	.captcha {
		margin: 16px 0;
	}
}
</style>
