﻿<template>
  <el-form :model="form" :rules="rules" ref="formRef" @submit.prevent="handleRegister">
    <el-form-item prop="username">
      <el-input
        v-model="form.username"
        placeholder="请输入账号（3-20个字符）"
        clearable
      >
        <template #prefix><el-icon><User /></el-icon></template>
      </el-input>
    </el-form-item>
    <el-form-item prop="nickname">
      <el-input
        v-model="form.nickname"
        placeholder="请输入昵称"
        clearable
      >
        <template #prefix><el-icon><UserFilled /></el-icon></template>
      </el-input>
    </el-form-item>
    <el-form-item prop="password">
      <el-input
        v-model="form.password"
        type="password"
        placeholder="请输入密码"
        show-password
      >
        <template #prefix><el-icon><Lock /></el-icon></template>
      </el-input>
    </el-form-item>
    <el-form-item prop="confirmPassword">
      <el-input
        v-model="form.confirmPassword"
        type="password"
        placeholder="请确认密码"
        show-password
      >
        <template #prefix><el-icon><Lock /></el-icon></template>
      </el-input>
    </el-form-item>
    <el-form-item>
      <el-button
        type="primary"
        :loading="loading"
        native-type="submit"
        style="width: 100%"
      >
        <el-icon><Check /></el-icon>
        <span style="margin-left: 4px">注册</span>
      </el-button>
    </el-form-item>
  </el-form>
</template>

<script setup>
import { ref, reactive } from 'vue'
import { ElMessage } from 'element-plus'
import { User, UserFilled, Lock, Check } from '@element-plus/icons-vue'
import { register } from '@/api/auth'

const emit = defineEmits(['success'])

const formRef = ref(null)
const loading = ref(false)

const form = reactive({
  username: '',
  nickname: '',
  password: '',
  confirmPassword: ''
})

const validateConfirmPassword = (rule, value, callback) => {
  if (value !== form.password) {
    callback(new Error('两次输入的密码不一致'))
  } else {
    callback()
  }
}

const rules = {
  username: [
    { required: true, message: '请输入账号', trigger: 'blur' },
    { min: 3, max: 20, message: '账号长度 3-20 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 6-20 个字符', trigger: 'blur' }
  ],
  confirmPassword: [
    { required: true, message: '请确认密码', trigger: 'blur' },
    { validator: validateConfirmPassword, trigger: 'blur' }
  ]
}

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

  loading.value = true
  try {
    await register({
      username: form.username,
      password: form.password,
      nickname: form.nickname || form.username
    })
    ElMessage.success('注册成功，请登录')
    emit('success')
  } catch (e) {
    if (!e.response) {
      ElMessage.error('后端服务不可用，请稍后重试')
    } else if (e.response.status >= 500) {
      ElMessage.error('服务器异常，请稍后重试')
    } else {
      ElMessage.error(e.response.data?.message || '注册失败，请重试')
    }
  } finally {
    loading.value = false
  }
}
</script>
