<template>
  <view class="login-wrapper">
    <!-- 1. Logo 及品牌信息 -->
    <view class="logo-section">
      <view class="logo-box">
        <!-- 优化：为了兼容微信小程序等跨端环境，原生 SVG 转换为 Base64 嵌入标准 image 标签中，确保完美渲染 -->
        <image class="logo-img" :src="logoSvgBase64" mode="aspectFit" />
      </view>
      <view class="brand-title">FitFlow 悦动健身</view>
      <view class="brand-slogan">健康极简 · 开启你的蜕变时刻</view>
    </view>

    <!-- 2. 登录方式 Tab 切换 -->
    <view class="tab-container">
      <view class="tab-item" :class="{ active: activeTab === 'sms' }" @click="switchTab('sms')">
        <u-icon
          name="phone"
          size="18"
          :color="activeTab === 'sms' ? '#0a1931' : '#7a8290'"
          class="tab-icon"
        />
        <text>免密登录</text>
      </view>
      <view
        class="tab-item"
        :class="{ active: activeTab === 'password' }"
        @click="switchTab('password')"
      >
        <u-icon
          name="lock"
          size="18"
          :color="activeTab === 'password' ? '#0a1931' : '#7a8290'"
          class="tab-icon"
        />
        <text>密码登录</text>
      </view>
    </view>

    <!-- 3. 表单区域 -->
    <view class="form-container">
      <!-- 手机号码 -->
      <view class="form-item-wrapper">
        <text class="form-label">手机号码</text>
        <view class="input-box">
          <u-icon name="phone" size="20" color="#a1a8b3" class="input-icon" />
          <input
            type="number"
            v-model="phoneNumber"
            placeholder="请输入您的手机号"
            placeholder-style="color: #a1a8b3"
            maxlength="11"
            class="native-input"
          />
        </view>
      </view>

      <!-- 验证码 / 密码（支持免密与密码登录切换） -->
      <view class="form-item-wrapper" v-if="activeTab === 'sms'">
        <text class="form-label">验证码</text>
        <view class="code-row">
          <view class="input-box flex-1">
            <u-icon name="chat" size="20" color="#a1a8b3" class="input-icon" />
            <input
              type="number"
              v-model="verifyCode"
              placeholder="6位验证码"
              placeholder-style="color: #a1a8b3"
              maxlength="6"
              class="native-input"
            />
          </view>
          <!-- 获取验证码按钮 -->
          <view
            class="code-btn"
            :class="{ disabled: countdown > 0 || isSending }"
            @click="handleGetCode"
          >
            <text>{{ countdown > 0 ? `${countdown}s 后重试` : '获取验证码' }}</text>
          </view>
        </view>
      </view>

      <!-- 密码输入框（密码登录模式时显示） -->
      <view class="form-item-wrapper" v-else>
        <text class="form-label">登录密码</text>
        <view class="input-box">
          <u-icon name="lock" size="20" color="#a1a8b3" class="input-icon" />
          <input
            type="password"
            v-model="password"
            placeholder="请输入您的密码"
            placeholder-style="color: #a1a8b3"
            class="native-input"
            :password="true"
          />
        </view>
      </view>
    </view>
    <!-- 忘记密码 -->
    <view class="forget-password" v-if="activeTab === 'password'">
      <view class="link-text" @click.stop="goToForgetPassword"> 忘记密码? </view>
    </view>
    <!-- 4. 用户协议与隐私政策 -->
    <view class="agreement-container" @click="isAgreed = !isAgreed">
      <view class="checkbox-box" :class="{ checked: isAgreed }">
        <u-icon v-if="isAgreed" name="checkbox-mark" size="12" color="#ffffff" />
      </view>
      <view class="agreement-text">
        我已阅读并同意 FitFlow
        <text class="link-text" @click.stop="goToAgreement('service')">《用户服务协议》</text>
        与
        <text class="link-text" @click.stop="goToAgreement('privacy')">《隐私政策》</text>
      </view>
    </view>

    <!-- 5. 立即登录按钮 -->
    <view class="submit-btn" :class="{ 'disabled-btn': isSubmitting }" @click="handleLogin">
      <text>{{ isSubmitting ? '登录中...' : '立即登录' }}</text>
    </view>
  </view>
</template>

<script setup>
  import { ref, onUnmounted } from 'vue';
  import sheep from '@/sheep';
  import AuthUtil from '@/sheep/api/member/auth';
  import { onHide } from '@dcloudio/uni-app';

  // 用于跨端兼容渲染的 Base64 编码火焰 SVG (绿渐变)
  const logoSvgBase64 =
    'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><defs><linearGradient id="g" x1="0%" y1="0%" x2="100%" y2="100%"><stop offset="0%" stop-color="%238fc31f" /><stop offset="100%" stop-color="%2300b074" /></linearGradient></defs><path d="M12 2C12 2 6 7.5 6 13C6 16.8 9.1 20 12 20C14.9 20 18 16.8 18 13C18 7.5 12 2 12 2ZM12 16C10.3 16 9 14.7 9 13C9 10.5 12 7.5 12 7.5C12 7.5 15 10.5 15 13C15 14.7 13.7 16 12 16Z" fill="url(%23g)" /></svg>';

  const activeTab = ref('sms'); // sms: 免密, password: 密码
  const phoneNumber = ref('');
  const verifyCode = ref('');
  const password = ref('');
  const isAgreed = ref(false);

  // 防抖及加载动画状态变量
  const isSending = ref(false);
  const isSubmitting = ref(false);

  // 验证码倒计时逻辑
  const countdown = ref(0);
  let timer = null;

  // 验证手机号码格式
  const validatePhone = (phone) => {
    return /^1[3-9]\d{9}$/.test(phone);
  };

  // 切换Tab，同时清理另一个 Tab 的输入
  const switchTab = (type) => {
    activeTab.value = type;
    verifyCode.value = '';
    password.value = '';
  };

  // 发送验证码
  const handleGetCode = async () => {
    if (countdown.value > 0 || isSending.value) return;

    // 前置逻辑校验
    if (!phoneNumber.value) {
      uni.showToast({ title: '请输入手机号码', icon: 'none' });
      return;
    }
    if (!validatePhone(phoneNumber.value)) {
      uni.showToast({ title: '请输入正确的11位手机号码', icon: 'none' });
      return;
    }

    isSending.value = true;
    try {
      // 成功发送验证码请求
      const res = await AuthUtil.sendSmsCode({ phone: phoneNumber.value });

      uni.showToast({ title: '验证码已发送', icon: 'success' });
      countdown.value = 60;
      timer = setInterval(() => {
        countdown.value--;
        if (countdown.value <= 0) {
          clearInterval(timer);
          timer = null;
        }
      }, 1000);
    } catch (err) {
      console.error('发送验证码失败异常:', err);
    } finally {
      isSending.value = false;
    }
  };

  // 登录按钮提交逻辑
  const handleLogin = async () => {
    if (isSubmitting.value) return;

    // 1. 用户协议验证
    if (!isAgreed.value) {
      uni.showToast({ title: '请先阅读并同意用户协议及隐私政策', icon: 'none' });
      return;
    }

    // 2. 基础手机号格式验证
    if (!phoneNumber.value) {
      uni.showToast({ title: '请输入手机号码', icon: 'none' });
      return;
    }
    if (!validatePhone(phoneNumber.value)) {
      uni.showToast({ title: '请输入正确的手机号码', icon: 'none' });
      return;
    }

    // 3. Tab特定表单验证并请求
    if (activeTab.value === 'sms') {
      if (!verifyCode.value) {
        uni.showToast({ title: '请输入验证码', icon: 'none' });
        return;
      }
      if (verifyCode.value.length < 4) {
        uni.showToast({ title: '请输入完整的验证码', icon: 'none' });
        return;
      }
      await performLogin('sms');
    } else {
      if (!password.value) {
        uni.showToast({ title: '请输入密码', icon: 'none' });
        return;
      }
      await performLogin('password');
    }
  };

  // 执行最终请求与状态写入
  const performLogin = async (type) => {
    isSubmitting.value = true;
    uni.showLoading({ title: '正在登录...', mask: true });

    try {
      let res = null;
      if (type === 'sms') {
        // 修复：原代码使用的 AuthApi 变更为导入的 AuthUtil 服务
        res = await AuthUtil.loginBySms({
          phone: phoneNumber.value,
          code: verifyCode.value,
        });
      } else {
        res = await AuthUtil.loginByPhonePassword({
          phone: phoneNumber.value,
          password: password.value,
        });
      }

      const authData = res.data || {};

      if (authData && authData.accessToken) {
        // 1. 取得芋道商城 Pinia 内置的 user Store
        const userStore = sheep.$store('user');

        // 2. 写入 Token 到 Pinia 及持久态 LocalStorage
        userStore.setToken(authData.accessToken, authData.refreshToken || '');

        // 3. 登录成功后，主动拉取一次用户信息同步至本地状态
         await userStore.getInfo();

        uni.showToast({
          title: '登录成功',
          icon: 'success',
        });

        // 4. 跳转至目标页面
        setTimeout(() => {
          uni.switchTab({
            url: '/pages/xunji/xunji',
          });
        }, 100);
      } else {
        uni.showToast({
          title: res.msg || '登录失败，未获取到有效凭证',
          icon: 'none',
        });
      }
    } catch (err) {
      console.error('登录逻辑异常:', err);
    } finally {
      isSubmitting.value = false;
      uni.hideLoading();
    }
  };

  // 忘记密码跳转
  const goToForgetPassword = () => {
    uni.navigateTo({
      url: '/pages7/pages/index/reset-password',
    });
  };

  // 协议详情跳转
  const goToAgreement = (type) => {
    const url =
      type === 'service'
        ? '/pages/public/richtext?id=service'
        : '/pages/public/richtext?id=privacy';
    uni.navigateTo({
      url,
      fail: () => {
        uni.showToast({
          title: `跳转至${type === 'service' ? '用户协议' : '隐私政策'}`,
          icon: 'none',
        });
      },
    });
  };

  // 页面卸载生命周期：清除定时器，规避潜在的内存泄露
  onHide(() => {
    if (timer) {
      clearInterval(timer);
      timer = null;
    }
  });
</script>

<style lang="scss" scoped>
  .login-wrapper {
    height: 100vh;
    // #ifdef H5
    height: calc(100vh - 44px);
    // #endif
    background-color: #ffffff;
    padding: 80rpx 50rpx;
    box-sizing: border-box;

    // 1. Logo
    .logo-section {
      display: flex;
      flex-direction: column;
      align-items: center;
      margin-bottom: 70rpx;
      margin-top: 40rpx;

      .logo-box {
        width: 140rpx;
        height: 140rpx;
        border-radius: 40rpx;
        background: #ffffff;
        border: 3rpx solid #d2ee9e;
        box-shadow: 0 16rpx 40rpx rgba(111, 214, 32, 0.12);
        display: flex;
        justify-content: center;
        align-items: center;
        margin-bottom: 30rpx;

        .logo-img {
          width: 76rpx;
          height: 76rpx;
        }
      }

      .brand-title {
        font-size: 46rpx;
        font-weight: bold;
        color: #0a1931;
        letter-spacing: 2rpx;
      }

      .brand-slogan {
        font-size: 26rpx;
        color: #9097a3;
        margin-top: 12rpx;
      }
    }

    // 2. Tab
    .tab-container {
      height: 96rpx;
      background-color: #f1f3f7;
      border-radius: 20rpx;
      display: flex;
      padding: 8rpx;
      box-sizing: border-box;
      margin-bottom: 50rpx;

      .tab-item {
        flex: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 28rpx;
        color: #7a8290;
        font-weight: 500;
        transition: all 0.2s ease;
        border-radius: 16rpx;

        .tab-icon {
          margin-right: 12rpx;
        }

        &.active {
          background-color: #ffffff;
          color: #0a1931;
          font-weight: bold;
          box-shadow: 0 4rpx 16rpx rgba(10, 25, 49, 0.05);
        }
      }
    }

    // 3. Form
    .form-container {
      .form-item-wrapper {
        margin-bottom: 36rpx;

        .form-label {
          font-size: 26rpx;
          color: #0a1931;
          font-weight: bold;
          display: block;
          margin-bottom: 16rpx;
        }

        .input-box {
          height: 104rpx;
          background-color: #f4f6fa;
          border: 2rpx solid #e1e6eb;
          border-radius: 24rpx;
          display: flex;
          align-items: center;
          padding: 0 30rpx;
          box-sizing: border-box;

          .input-icon {
            margin-right: 16rpx;
          }

          .native-input {
            flex: 1;
            height: 100%;
            font-size: 28rpx;
            color: #0a1931;
          }
        }

        // 验证码一栏的双列布局
        .code-row {
          display: flex;
          align-items: center;

          .flex-1 {
            flex: 1;
          }

          .code-btn {
            width: 220rpx;
            height: 104rpx;
            border-radius: 24rpx;
            background-color: #f9fdf2;
            border: 2rpx solid #d0ee9c;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-left: 20rpx;
            font-size: 26rpx;
            color: #8fc31f;
            font-weight: bold;
            transition: all 0.2s ease;

            &:active {
              opacity: 0.8;
            }

            &.disabled {
              color: #b0b8c4;
              background-color: #f4f6fa;
              border-color: #e1e6eb;
              pointer-events: none; // 禁用点击以避免多余的触发
            }
          }
        }
      }
    }

    .forget-password {
      text-align: right;
      margin-top: 20rpx;
      font-size: 24rpx;
      color: rgb(220, 54, 46);
    }

    // 4. Agreement
    .agreement-container {
      display: flex;
      align-items: flex-start;
      margin-top: 40rpx;
      margin-bottom: 50rpx;
      padding: 0 6rpx;

      .checkbox-box {
        width: 32rpx;
        height: 32rpx;
        border: 2rpx solid #c2c9d3;
        border-radius: 8rpx;
        margin-right: 16rpx;
        margin-top: 4rpx;
        display: flex;
        justify-content: center;
        align-items: center;
        transition: all 0.15s ease;
        box-sizing: border-box;

        &.checked {
          border-color: #00b074;
          background-color: #00b074;
        }
      }

      .agreement-text {
        flex: 1;
        font-size: 24rpx;
        color: #7a8290;
        line-height: 1.5;

        .link-text {
          color: #8fc31f;
          font-weight: 500;
        }
      }
    }

    // 5. Submit Button
    .submit-btn {
      height: 104rpx;
      border-radius: 24rpx;
      background: linear-gradient(135deg, #79d621 0%, #00b074 100%);
      box-shadow: 0 16rpx 40rpx rgba(0, 176, 116, 0.25);
      display: flex;
      justify-content: center;
      align-items: center;
      color: #ffffff;
      font-size: 32rpx;
      font-weight: bold;
      letter-spacing: 2rpx;
      transition: all 0.2s ease;

      &:active {
        transform: scale(0.98);
        opacity: 0.9;
      }

      &.disabled-btn {
        opacity: 0.75;
        pointer-events: none; // 阻止后续的多余点击
      }

      .btn-arrow {
        margin-left: 10rpx;
      }
    }
  }
</style>