<script setup lang="ts">
import { ref } from 'vue';
import { useRoute, useRouter } from 'vue-router';
import { useI18n } from 'vue-i18n';
import { defaultPhoneIsoForLocale, getPhoneDialFromIso, isValidPlayerUsername } from '@thebet365/shared';
import { useAuthStore } from '../stores/auth';
import { useAppLocale } from '../composables/useAppLocale';
import { useSmsCode } from '../composables/useSmsCode';
import LocaleSwitcher from '../components/LocaleSwitcher.vue';
import PhoneCountrySelect from '../components/PhoneCountrySelect.vue';
import GoldSpinner from '../components/GoldSpinner.vue';
import loginBg from '../assets/images/h5bg.webp';

const { t, locale } = useI18n();
const { initFromUser } = useAppLocale();
const auth = useAuthStore();
const router = useRouter();
const route = useRoute();

const account = ref('');
const phone = ref('');
const countryIso = ref(defaultPhoneIsoForLocale(locale.value));
const password = ref('');
const confirmPassword = ref('');
const smsCode = ref('');
const inviteCode = ref(typeof route.query.code === 'string' ? route.query.code : '');
const error = ref('');
const loading = ref(false);

const { sessionId, countdown, sending, error: smsError, send } = useSmsCode();

async function sendCode() {
  await send(phone.value, getPhoneDialFromIso(countryIso.value));
}

async function submit() {
  if (!account.value.trim()) {
    error.value = t('auth.username_required');
    return;
  }
  if (!isValidPlayerUsername(account.value)) {
    error.value = t('auth.username_format_invalid');
    return;
  }
  if (!sessionId.value) {
    error.value = t('auth.sms_required');
    return;
  }
  if (!smsCode.value.trim()) {
    error.value = t('auth.sms_code_required');
    return;
  }
  if (password.value !== confirmPassword.value) {
    error.value = t('auth.password_mismatch');
    return;
  }
  loading.value = true;
  error.value = '';
  try {
    await auth.register(
      account.value,
      phone.value,
      getPhoneDialFromIso(countryIso.value),
      password.value,
      smsCode.value,
      sessionId.value,
      inviteCode.value,
    );
    initFromUser(auth.user?.locale);
    const redirectTo = (route.query.redirect as string) || '/';
    router.push(redirectTo);
  } catch (e: unknown) {
    error.value = (e as { response?: { data?: { error?: string } } })?.response?.data?.error || t('auth.register_failed');
  } finally {
    loading.value = false;
  }
}

function goLogin() {
  router.push({ path: '/login', query: route.query.redirect ? { redirect: route.query.redirect as string } : {} });
}

function isGuestBrowsablePath(path: string): boolean {
  if (!path || path === '/' || path === '/bet') return true;
  if (path.startsWith('/match/')) return true;
  return false;
}

function continueBrowsing() {
  const redirect = typeof route.query.redirect === 'string' ? route.query.redirect : '';
  const target = isGuestBrowsablePath(redirect) ? redirect || '/' : '/';
  router.replace(target);
}

const fieldError = () => {
  if (error.value) return error.value;
  if (smsError.value === 'phone_required') return t('auth.phone_required');
  if (smsError.value) return smsError.value;
  return '';
};
</script>

<template>
  <div class="login-page" :style="{ backgroundImage: `url(${loginBg})` }">
    <div class="login-lang">
      <LocaleSwitcher compact />
    </div>
    <form @submit.prevent="submit" class="login-form ps-gold-frame" :class="{ 'is-busy': loading }">
      <div v-if="loading" class="form-busy-overlay" aria-hidden="true">
        <GoldSpinner :size="40" :active="true" />
        <p class="form-busy-text">{{ t('auth.registering') }}</p>
      </div>
      <h2 class="form-title">{{ t('auth.register') }}</h2>

      <div class="field">
        <label>{{ t('auth.username') }}</label>
        <input
          v-model="account"
          class="field-input"
          required
          autocomplete="username"
          maxlength="32"
          minlength="7"
          :disabled="loading"
          :placeholder="t('auth.username_register_placeholder')"
        />
      </div>

      <div class="field">
        <label>{{ t('auth.phone') }}</label>
        <div class="inline-row">
          <PhoneCountrySelect v-model="countryIso" />
          <input
            v-model="phone"
            class="field-input"
            type="tel"
            required
            autocomplete="tel-national"
            :disabled="loading"
            :placeholder="t('auth.phone_local_placeholder')"
          />
        </div>
      </div>

      <div class="field">
        <label>{{ t('auth.sms_code') }}</label>
        <div class="inline-row">
          <input
            v-model="smsCode"
            class="field-input"
            inputmode="numeric"
            maxlength="6"
            autocomplete="one-time-code"
            :disabled="loading"
            :placeholder="t('auth.sms_code_placeholder')"
          />
          <button
            type="button"
            class="btn-secondary"
            :disabled="sending || countdown > 0 || !phone.trim() || loading"
            @click="sendCode"
          >
            <span v-if="sending" class="btn-inline-loading">
              <GoldSpinner :size="14" :active="true" />
              {{ t('auth.sending_sms') }}
            </span>
            <span v-else>{{ countdown > 0 ? `${countdown}s` : t('auth.send_sms') }}</span>
          </button>
        </div>
      </div>

      <div class="field">
        <label>{{ t('auth.password') }}</label>
        <input v-model="password" class="field-input" type="password" required autocomplete="new-password" minlength="8" :disabled="loading" />
      </div>

      <div class="field">
        <label>{{ t('auth.confirm_password') }}</label>
        <input v-model="confirmPassword" class="field-input" type="password" required autocomplete="new-password" minlength="8" :disabled="loading" />
      </div>

      <div class="field field-optional">
        <label>{{ t('auth.invite_code') }} <span class="optional-tag">{{ t('auth.optional') }}</span></label>
        <input v-model="inviteCode" class="field-input" autocomplete="off" :disabled="loading" />
      </div>

      <p v-if="fieldError()" class="error">{{ fieldError() }}</p>

      <button
        type="submit"
        class="btn-login btn-gold-outline"
        :class="{ 'is-loading': loading }"
        :disabled="loading"
        :aria-busy="loading"
      >
        <span v-if="loading" class="btn-inline-loading">
          <GoldSpinner :size="18" :active="true" />
          {{ t('auth.registering') }}
        </span>
        <span v-else>{{ t('auth.register_btn') }}</span>
      </button>
      <button type="button" class="btn-skip" :disabled="loading" @click="goLogin">
        {{ t('auth.have_account') }}
      </button>
    </form>
    <button type="button" class="btn-skip-light" @click="continueBrowsing">
      {{ t('auth.continue_browsing') }}
    </button>
  </div>
</template>

<style scoped>
.login-lang {
  position: absolute;
  top: max(12px, env(safe-area-inset-top));
  right: 16px;
  z-index: 2;
}

.login-page {
  position: relative;
  height: 100%;
  min-height: 100dvh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding: 30vh 16px calc(10vh + max(20px, env(safe-area-inset-bottom)));
  background: linear-gradient(160deg, #E8EDF2 0%, #F5F7FA 40%, #FFFFFF 100%);
  background-size: cover;
  background-position: center top;
  background-repeat: no-repeat;
}

.login-form {
  position: relative;
  width: 100%;
  max-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.login-form.is-busy {
  pointer-events: none;
}

.form-busy-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(2px);
  pointer-events: all;
}

.form-busy-text {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  color: #003D6B;
  letter-spacing: 0.04em;
}

.btn-inline-loading {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.form-title {
  margin: 0 0 2px;
  font-size: 16px;
  font-weight: 800;
  color: #1A1A2E;
  text-align: center;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-optional {
  opacity: 0.85;
}

label {
  font-size: 10px;
  color: #6B7280;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.optional-tag {
  font-size: 10px;
  font-weight: 500;
  color: #6B7280;
}

.field-input {
  width: 100%;
  height: 36px;
  padding: 0 10px;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  background: #FFFFFF;
  color: #1A1A2E;
  font-size: 14px;
  font-family: inherit;
}

.field-input::placeholder {
  color: rgba(107, 114, 128, 0.6);
}

.field-input:focus {
  outline: none;
  border-color: #0066CC;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.15);
}

.inline-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

.inline-row .field-input {
  flex: 1;
  min-width: 0;
}

.btn-secondary {
  flex-shrink: 0;
  height: 36px;
  padding: 0 10px;
  border: 1px solid #E5E7EB;
  border-radius: 6px;
  background: #F5F7FA;
  color: #003D6B;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
}

.btn-secondary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-login {
  margin-top: 2px;
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
}

.btn-login:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-login.is-loading:disabled {
  opacity: 1;
}

.btn-skip {
  margin-top: 2px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: #003D6B;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.btn-skip:active {
  color: #005B9F;
}

.btn-skip-light {
  position: absolute;
  bottom: calc(20px + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: #6B7280;
  font-size: 13px;
  font-weight: 400;
  cursor: pointer;
  white-space: nowrap;
}

.btn-skip-light:active {
  color: #003D6B;
}

.error {
  margin: 0;
  color: #DC2626;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
}
</style>
