<template>
  <div class="login-container">
    <div class="login-form-container">
      <!-- Logo区域 -->
      <div class="login-header">
        <img src="/logo.png" alt="Logo" class="login-logo" />
        <h1 class="login-title">Apple经销商ERP系统</h1>
        <p class="login-subtitle">欢迎登录</p>
      </div>
      
      <!-- 登录表单 -->
      <el-form
        ref="loginFormRef"
        :model="loginForm"
        :rules="loginRules"
        class="login-form"
        @keyup.enter="handleLogin"
      >
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            size="large"
            prefix-icon="User"
            clearable
          />
        </el-form-item>
        
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            placeholder="请输入密码"
            size="large"
            prefix-icon="Lock"
            show-password
            clearable
          />
        </el-form-item>
        
        <el-form-item prop="captcha" v-if="showCaptcha">
          <div class="captcha-container">
            <el-input
              v-model="loginForm.captcha"
              placeholder="请输入验证码"
              size="large"
              prefix-icon="Picture"
              clearable
            />
            <img
              :src="captchaImage"
              alt="验证码"
              class="captcha-image"
              @click="refreshCaptcha"
            />
          </div>
        </el-form-item>
        
        <el-form-item>
          <div class="login-options">
            <el-checkbox v-model="loginForm.rememberMe">
              记住我
            </el-checkbox>
            <el-link type="primary" class="forgot-password">
              忘记密码？
            </el-link>
          </div>
        </el-form-item>
        
        <el-form-item>
          <el-button
            type="primary"
            size="large"
            class="login-btn"
            :loading="loading"
            @click="handleLogin"
          >
            {{ loading ? '登录中...' : '登录' }}
          </el-button>
        </el-form-item>
      </el-form>
    </div>
    
    <!-- 背景装饰 -->
    <div class="login-bg">
      <div class="bg-circle bg-circle-1"></div>
      <div class="bg-circle bg-circle-2"></div>
      <div class="bg-circle bg-circle-3"></div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, reactive, onMounted } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { ElMessage, type FormInstance, type FormRules } from 'element-plus'
import { useUserStore } from '@/stores/modules/user'
import type { LoginForm } from '@/types'

const router = useRouter()
const route = useRoute()
const userStore = useUserStore()

// 表单引用
const loginFormRef = ref<FormInstance>()

// 加载状态
const loading = ref(false)

// 验证码相关
const showCaptcha = ref(false)
const captchaImage = ref('')

// 登录表单数据
const loginForm = reactive<LoginForm>({
  username: '',
  password: '',
  captcha: '',
  rememberMe: false
})

// 表单验证规则
const loginRules: FormRules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 2, max: 20, message: '用户名长度在 2 到 20 个字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    { min: 6, max: 20, message: '密码长度在 6 到 20 个字符', trigger: 'blur' }
  ],
  captcha: [
    { required: true, message: '请输入验证码', trigger: 'blur' }
  ]
}

// 处理登录
const handleLogin = async () => {
  if (!loginFormRef.value) return
  
  try {
    const valid = await loginFormRef.value.validate()
    if (!valid) return
    
    loading.value = true
    
    await userStore.login(loginForm)
    
    // 登录成功，跳转到目标页面或首页
    const redirect = route.query.redirect as string
    router.push(redirect || '/')
  } catch (error) {
    console.error('登录失败:', error)
    // 显示验证码
    showCaptcha.value = true
    await refreshCaptcha()
  } finally {
    loading.value = false
  }
}

// 刷新验证码
const refreshCaptcha = async () => {
  try {
    // 这里应该调用获取验证码的API
    // const response = await getCaptchaApi()
    // captchaImage.value = response.captchaImage
    captchaImage.value = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg=='
  } catch (error) {
    console.error('获取验证码失败:', error)
  }
}

// 组件挂载时初始化
onMounted(() => {
  // 如果已经登录，直接跳转到首页
  if (userStore.isLoggedIn) {
    router.push('/')
  }
})
</script>

<style lang="scss" scoped>
.login-container {
  position: relative;
  width: 100%;
  height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.login-form-container {
  position: relative;
  z-index: 2;
  width: 400px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
  
  .login-logo {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
  }
  
  .login-title {
    margin: 0 0 8px 0;
    font-size: 24px;
    font-weight: 600;
    color: var(--el-text-color-primary);
  }
  
  .login-subtitle {
    margin: 0;
    font-size: 14px;
    color: var(--el-text-color-secondary);
  }
}

.login-form {
  .captcha-container {
    display: flex;
    align-items: center;
    gap: 12px;
    
    .captcha-image {
      width: 100px;
      height: 40px;
      border-radius: 4px;
      cursor: pointer;
      border: 1px solid var(--el-border-color);
    }
  }
  
  .login-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    
    .forgot-password {
      font-size: 14px;
    }
  }
  
  .login-btn {
    width: 100%;
    height: 44px;
    font-size: 16px;
    font-weight: 500;
  }
}

.login-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  
  .bg-circle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 6s ease-in-out infinite;
    
    &.bg-circle-1 {
      width: 200px;
      height: 200px;
      top: 10%;
      left: 10%;
      animation-delay: 0s;
    }
    
    &.bg-circle-2 {
      width: 150px;
      height: 150px;
      top: 60%;
      right: 10%;
      animation-delay: 2s;
    }
    
    &.bg-circle-3 {
      width: 100px;
      height: 100px;
      bottom: 20%;
      left: 20%;
      animation-delay: 4s;
    }
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

// 响应式设计
@media (max-width: 768px) {
  .login-form-container {
    width: 90%;
    padding: 24px;
  }
  
  .login-header {
    .login-title {
      font-size: 20px;
    }
  }
}
</style>