<script setup lang="ts">
import { reactive, ref } from "vue";
import { RouterLink, useRoute, useRouter } from "vue-router";
import { showToast, showDialog } from "vant";

import { useSessionStore } from "@/stores/session";
import { useSmsCountdown } from "@/shared/composables/useSmsCountdown";

const router = useRouter();
const route = useRoute();
const session = useSessionStore();
const loading = ref(false);
const agreed = ref(false);
const form = reactive({
  phone: "",
  code: "",
});

const { countDown, sending, handleSendCode, readError } = useSmsCountdown();

async function handleLogin() {
  if (!agreed.value) {
    showDialog({
      title: "提示",
      message: "请先阅读并同意用户协议和隐私政策",
    });
    return;
  }

  loading.value = true;
  try {
    await session.login(form.phone, form.code);
    const redirect = typeof route.query.redirect === "string" ? route.query.redirect : "/m/profile";
    await router.replace(redirect);
  } catch {
    showToast({ message: "登录失败，请检查手机号和验证码", icon: "cross" });
  } finally {
    loading.value = false;
  }
}
</script>

<template>
  <main class="mobile-login-shell">
    <header class="page-header">
      <button class="back-btn" type="button" @click="router.back()">
        <van-icon name="arrow-left" :size="20" />
      </button>
    </header>

    <section class="auth-body">
      <div class="brand-lockup">
        <div class="brand-logo">锤</div>
        <strong>大锤商行</strong>
      </div>

      <div class="form-section">
        <h1>登录</h1>

        <label class="auth-input-row">
          <input
            v-model="form.phone"
            type="tel"
            maxlength="11"
            placeholder="手机号"
          />
        </label>

        <label class="auth-input-row code-row">
          <input
            v-model="form.code"
            type="text"
            inputmode="numeric"
            maxlength="6"
            placeholder="验证码"
          />
          <span class="code-action">
            <van-button
              size="small"
              plain
              :disabled="sending || countDown > 0"
              :loading="sending"
              class="code-btn"
              @click="handleSendCode(form.phone)"
            >
              {{
                countDown > 0
                  ? `${countDown}s`
                  : sending
                  ? "发送中"
                  : "发送验证码"
              }}
            </van-button>
          </span>
        </label>

        <div class="assist-row">
          <span>验证码登录</span>
          <RouterLink to="/m/register">没有账号？<b>立即注册</b></RouterLink>
        </div>

        <div class="agreement-row">
          <van-checkbox v-model="agreed" shape="square" icon-size="16px">
            我已阅读并同意《<b>用户协议</b>》和《<b>隐私政策</b>》
          </van-checkbox>
        </div>

        <van-button
          type="primary"
          block
          class="primary-button"
          :loading="loading"
          loading-text="登录中..."
          @click="handleLogin"
        >
          登录
        </van-button>

        <RouterLink to="/m/register" class="secondary-entry">
          还没有账号，创建一个
        </RouterLink>
      </div>
    </section>
  </main>
</template>

<style scoped>
.mobile-login-shell {
  min-height: 100dvh;
  background:
    radial-gradient(circle at 50% 12%, rgba(20, 119, 255, 0.1), transparent 34%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 70%, #f7fafc 100%);
  color: #111827;
}

.page-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  height: 48px;
  margin: 0;
  padding: 0 18px;
  background: transparent;
}

.back-btn {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: none;
  border-radius: 999px;
  background: none;
  color: #111827;
}

.auth-body {
  box-sizing: border-box;
  display: flex;
  min-height: 100dvh;
  flex-direction: column;
  justify-content: center;
  padding: 54px 34px 28px;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 0 auto clamp(34px, 6vh, 54px);
}

.brand-logo {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, #1477ff, #2f8dff);
  box-shadow: 0 14px 32px rgba(20, 119, 255, 0.18);
  color: #ffffff;
  font-size: 19px;
  font-weight: 900;
}

.brand-lockup strong {
  display: block;
  color: #111827;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0;
}

.form-section {
  width: min(100%, 420px);
  margin: 0 auto;
}

.form-section h1 {
  margin: 0 0 22px;
  color: #05070a;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.2;
}

.auth-input-row {
  display: flex;
  align-items: center;
  min-height: 48px;
  margin-bottom: 10px;
  padding: 0 16px;
  border: 1px solid #e1e5eb;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.03);
}

.auth-input-row.code-row {
  gap: 8px;
}

.auth-input-row input {
  width: 100%;
  min-width: 0;
  border: none;
  background: transparent;
  color: #0f172a;
  font-size: 16px;
  outline: none;
}

.auth-input-row input::placeholder {
  color: #b6beca;
}

.code-action {
  display: flex;
  justify-content: flex-end;
}

.code-btn {
  min-width: 82px;
  height: 32px;
  border-color: #1477ff !important;
  border-radius: 8px;
  color: #1477ff !important;
  font-weight: 700;
}

.assist-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin: 14px 0 24px;
  color: #111827;
  font-size: 13px;
}

.assist-row span {
  min-width: 0;
  color: #1477ff;
}

.assist-row a {
  flex-shrink: 0;
  color: #22252b;
  text-decoration: none;
}

.assist-row b {
  color: #05070a;
  font-weight: 900;
}

.agreement-row {
  display: flex;
  align-items: center;
  margin: 0 0 20px;
}

.agreement-row :deep(.van-checkbox__label) {
  margin-left: 8px;
  color: #252b36;
  font-size: 12px;
  line-height: 1.4;
}

.agreement-row :deep(.van-checkbox__label b) {
  color: #1477ff;
  font-weight: 700;
}

.primary-button {
  height: 48px;
  border: none !important;
  border-radius: 10px !important;
  background: #1477ff !important;
  box-shadow: 0 12px 24px rgba(20, 119, 255, 0.18);
  font-size: 17px;
  font-weight: 900;
}

.secondary-entry {
  display: grid;
  min-height: 46px;
  margin-top: 12px;
  place-items: center;
  border: 1px solid #e4e8ee;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.82);
  color: #1477ff;
  font-size: 15px;
  font-weight: 900;
  text-align: center;
  text-decoration: none;
}

@media (max-height: 700px) {
  .auth-body {
    justify-content: flex-start;
    padding-top: 52px;
  }

  .brand-lockup {
    margin-bottom: 26px;
  }

  .form-section h1 {
    margin-bottom: 18px;
  }

  .assist-row {
    margin-bottom: 18px;
  }
}
</style>
