<script setup lang="ts">
import { ref, reactive } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { useUserStore } from '@/stores/user'
import { User, Lock } from '@element-plus/icons-vue'
import type { FormInstance, FormRules } from 'element-plus'

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

const formRef = ref<FormInstance>()
const loading = ref(false)
const errorMsg = ref('')

const form = reactive({
  username: '',
  password: '',
  remember: false
})

const rules: FormRules = {
  username: [{ required: true, message: '请输入用户名', trigger: 'blur' }],
  password: [{ required: true, message: '请输入密码', trigger: 'blur' }]
}

async function handleLogin() {
  const valid = await formRef.value?.validate().catch(() => false)
  if (!valid) return

  loading.value = true
  errorMsg.value = ''

  try {
    const nextPath = await userStore.login(form.username, form.password, form.remember)
    const redirect = (route.query.next as string) || nextPath || '/'
    router.push(redirect)
  } catch (err: any) {
    errorMsg.value = err.message || '登录失败'
  } finally {
    loading.value = false
  }
}
</script>

<template>
  <div class="login-page">
    <div class="login-card">
      <div class="login-header">
        <h1>问题排查助手</h1>
        <p>请登录以继续访问系统</p>
      </div>
      <div class="login-body">
        <el-form ref="formRef" :model="form" :rules="rules" @submit.prevent="handleLogin">
          <el-form-item prop="username">
            <el-input
              v-model="form.username"
              placeholder="请输入用户名"
              :prefix-icon="User"
              size="large"
            />
          </el-form-item>
          <el-form-item prop="password">
            <el-input
              v-model="form.password"
              type="password"
              placeholder="请输入密码"
              :prefix-icon="Lock"
              size="large"
              show-password
            />
          </el-form-item>
          <el-form-item>
            <el-checkbox v-model="form.remember">记住登录状态</el-checkbox>
          </el-form-item>
          <el-button
            type="primary"
            native-type="submit"
            :loading="loading"
            size="large"
            class="btn-login"
          >
            登 录
          </el-button>
        </el-form>
        <el-alert
          v-if="errorMsg"
          :title="errorMsg"
          type="error"
          show-icon
          :closable="false"
          class="error-alert"
        />
      </div>
      <div class="login-footer">
        <p>如有账号问题，请联系管理员</p>
      </div>
    </div>
  </div>
</template>

<style scoped lang="scss">
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 20px;
}

.login-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  width: 100%;
  max-width: 400px;
  overflow: hidden;
}

.login-header {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
  color: white;
  padding: 32px;
  text-align: center;

  h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  p {
    opacity: 0.8;
    font-size: 14px;
  }
}

.login-body {
  padding: 32px;
}

.btn-login {
  width: 100%;
  margin-top: 8px;
}

.error-alert {
  margin-top: 16px;
}

.login-footer {
  text-align: center;
  padding: 16px 32px 24px;
  color: $gray-500;
  font-size: 12px;
  border-top: 1px solid $gray-100;
}
</style>