<template>
  <div class="login-page">
    <!-- Logo -->
    <div class="logo">
      <img src="/images/backgrounds/logo.svg?v=2" alt="Logo" />
    </div>
    
    <!-- 修改密码卡片 -->
    <div class="login-card">
      <!-- 标题 -->
      <div class="page-title">{{ $t('changePassword.title') }}</div>

      <!-- 表单 -->
      <div class="password-form">
        <!-- 当前密码（可选） -->
        <div class="input-group">
          <a-input
            v-model="form.currentPassword"
            :placeholder="$t('changePassword.currentPasswordPlaceholder')"
            class="password-input"
            show-password
            @keyup.enter="handleSubmit"
          />
          <div class="input-error" v-if="errors.currentPassword">{{ errors.currentPassword }}</div>
        </div>

        <!-- 新密码 -->
        <div class="input-group">
          <a-input
            v-model="form.newPassword"
            :placeholder="$t('changePassword.newPasswordPlaceholder')"
            class="password-input"
            show-password
            @keyup.enter="handleSubmit"
          />
          <div class="input-error" v-if="errors.newPassword">{{ errors.newPassword }}</div>
        </div>

        <!-- 确认新密码 -->
        <div class="input-group">
          <a-input
            v-model="form.confirmPassword"
            :placeholder="$t('changePassword.confirmPasswordPlaceholder')"
            class="password-input"
            show-password
            @keyup.enter="handleSubmit"
          />
          <div class="input-error" v-if="errors.confirmPassword">{{ errors.confirmPassword }}</div>
        </div>
        
        <!-- 确定修改按钮 -->
        <a-button
          type="primary"
          class="submit-button"
          :loading="loading"
          @click="handleSubmit"
        >
          {{ loading ? $t('changePassword.submitting') : $t('changePassword.confirm') }}
        </a-button>
        
        <!-- 返回按钮 -->
        <div class="back-button-wrapper">
          <a-button
            class="back-button"
            @click="handleBack"
          >
            {{ $t('common.back') }}
          </a-button>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, reactive, computed, onMounted } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { useUserStore } from '@/stores/user'
import { message } from 'ant-design-vue'
import request from '@/api/request'
import { useI18n } from 'vue-i18n'

const { t } = useI18n()
const router = useRouter()
const route = useRoute()
const userStore = useUserStore()

const loading = ref(false)

// 判断是否首次设置密码
const isFirstTimeSetup = computed(() => {
  return localStorage.getItem('needSetPassword') === '1'
})

const form = reactive({
  currentPassword: '',
  newPassword: '',
  confirmPassword: ''
})

const errors = reactive({
  currentPassword: '',
  newPassword: '',
  confirmPassword: ''
})

// 验证表单
const validateForm = () => {
  let valid = true
  errors.currentPassword = ''
  errors.newPassword = ''
  errors.confirmPassword = ''

  // 当前密码为可选，不强制必填

  // 新密码必填，且必须包含英文字母和数字，不少于8位
  if (!form.newPassword) {
    errors.newPassword = t('changePassword.enterNewPassword')
    valid = false
  } else if (form.newPassword.length < 8) {
    errors.newPassword = t('changePassword.passwordMinLength')
    valid = false
  } else if (!/[a-zA-Z]/.test(form.newPassword)) {
    errors.newPassword = t('changePassword.passwordNeedLetter')
    valid = false
  } else if (!/[0-9]/.test(form.newPassword)) {
    errors.newPassword = t('changePassword.passwordNeedNumber')
    valid = false
  }

  // 确认密码必填且必须与新密码一致
  if (!form.confirmPassword) {
    errors.confirmPassword = t('changePassword.confirmPasswordRequired')
    valid = false
  } else if (form.newPassword !== form.confirmPassword) {
    errors.confirmPassword = t('changePassword.passwordMismatch')
    valid = false
  }

  return valid
}

// 提交修改
const handleSubmit = async () => {
  if (!validateForm()) return

  loading.value = true

  try {
    const response = await request({
      url: '/auth/change-password',
      method: 'post',
      data: {
        oldPassword: form.currentPassword || null,
        newPassword: form.newPassword
      }
    })

    console.log('修改密码响应:', response)
    
    // response.data 是后端返回的数据
    const result = response.data
    if (result && result.success) {
      message.success(t('common.passwordSetSuccess'))
      
      // 清除首次设置标记
      localStorage.removeItem('needSetPassword')
      
      // 跳转到首页或之前的页面
      const redirect = route.query.redirect || '/profile'
      router.replace(redirect)
    } else {
      message.error(result?.message || t('common.updateFailed'))
    }
  } catch (error) {
    console.error('修改密码失败:', error)
    const errorMsg = error.response?.data?.message || error.message || t('common.updateFailed')
    message.error(errorMsg)
  } finally {
    loading.value = false
  }
}

// 返回
const handleBack = () => {
  if (isFirstTimeSetup.value) {
    // 首次设置时返回到首页
    router.replace('/')
  } else {
    // 非首次设置时返回上一页
    router.back()
  }
}

onMounted(() => {
  // 检查用户是否已登录
  if (!userStore.isAuthenticated) {
    router.replace('/login')
  }
})
</script>

<style scoped>
.login-page {
  min-height: 100vh;
  width: 100vw;
  height: 100vh;
  background: var(--bg-root) url('/images/backgrounds/login_bg.png') center/cover no-repeat;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  font-family: var(--font-sans);
  margin: 0;
  padding: 0;
  z-index: var(--z-base);
}

/* 左上角Logo */
.logo {
  position: absolute;
  top: 30px;
  left: 30px;
  z-index: 10;
}

.logo img {
  height: 40px;
  width: auto;
}

/* 卡片 */
.login-card {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 550px;
  max-width: 90vw;
  background: var(--bg-glass);
  backdrop-filter: blur(50px);
  -webkit-backdrop-filter: blur(50px);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-default);
  padding: 60px 80px;
  z-index: 10;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

/* 页面标题 */
.page-title {
  text-align: center;
  font-size: var(--text-4xl);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: 50px;
}

/* 表单 */
.password-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* 输入组 */
.input-group {
  margin-bottom: 5px;
}

.password-input {
  width: 100%;
}

.password-input :deep(.ant-input) {
  background: var(--bg-glass);
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: none;
  height: 60px;
  transition: all var(--duration-slow) var(--ease-default);
}

.password-input :deep(.ant-input:hover) {
  background: var(--bg-glass-hover);
}

.password-input :deep(.ant-input:focus) {
  background: var(--bg-active);
  box-shadow: none;
}

.password-input :deep(.ant-input) {
  color: var(--text-primary);
  background: transparent;
  font-size: var(--text-base);
}

.password-input :deep(.ant-input::placeholder) {
  color: var(--text-tertiary);
}

.input-error {
  color: var(--error-400);
  font-size: var(--text-xs);
  margin-top: var(--space-1);
  text-align: left;
}

/* 确定修改按钮 */
.submit-button {
  width: 100%;
  height: 60px;
  background: var(--primary-500);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  margin-top: var(--space-5);
  transition: all var(--duration-slow) var(--ease-default);
}

.submit-button:hover {
  background: var(--primary-400);
  transform: translateY(-1px);
}

.submit-button:active {
  transform: translateY(0);
}

/* 返回按钮 */
.back-button {
  width: 100%;
  height: 60px;
  background: var(--bg-glass);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: var(--font-medium);
  transition: all var(--duration-slow) var(--ease-default);
}

.back-button:hover {
  background: var(--bg-glass-hover);
}

.back-button-wrapper {
  width: 100%;
}

.back-button-wrapper .back-button {
  width: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .login-card {
    width: 90%;
    padding: var(--space-10) var(--space-8);
  }
  
  .page-title {
    font-size: var(--text-3xl);
  }
}

@media (max-width: 480px) {
  .login-card {
    padding: var(--space-8) var(--space-5);
  }
  
  .page-title {
    font-size: var(--text-2xl);
  }
}
</style>
