<template>
  <div class="kole-formmodal-mask" v-if="visible" @click.self="$emit('cancel')">
    <div class="kole-formmodal">
      <div class="kole-formmodal-head">
        <span>{{ title }}</span>
        <button class="kole-formmodal-close" @click="$emit('cancel')">×</button>
      </div>
      <div class="kole-formmodal-body">
        <div class="kole-form-row" v-for="f in fields" :key="f.key">
          <label class="kole-form-label"><span class="req" v-if="f.required">*</span>{{ f.label }}</label>
          <input
            class="kole-form-input"
            :class="{ 'is-error': errors[f.key] }"
            :value="form[f.key]"
            :placeholder="f.placeholder"
            @input="onInput(f.key, $event)"
          />
          <div class="kole-form-err" v-if="errors[f.key]">{{ errors[f.key] }}</div>
        </div>
      </div>
      <div class="kole-formmodal-foot">
        <button class="kole-btn" @click="$emit('cancel')">取消</button>
        <button class="kole-btn kole-btn--primary" @click="submit">提交</button>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, watch } from 'vue';

const props = defineProps({
  visible: { type: Boolean, default: false },
  title: { type: String, default: '表单' },
  fields: {
    type: Array,
    default: () => [
      { key: 'name', label: '姓名', required: true, placeholder: '请输入姓名' },
      { key: 'email', label: '邮箱', required: true, placeholder: 'name@example.com' },
      { key: 'role', label: '角色', placeholder: '如：管理员' }
    ]
  },
  value: { type: Object, default: () => ({}) }
});
const emit = defineEmits(['cancel', 'submit']);

const form = ref({ ...props.value });
const errors = ref({});
watch(
  () => props.visible,
  (v) => { if (v) { form.value = { ...props.value }; errors.value = {}; } }
);

function onInput(key, e) {
  form.value[key] = e.target.value;
  if (errors.value[key]) delete errors.value[key];
}
function submit() {
  const errs = {};
  props.fields.forEach((f) => {
    const v = (form.value[f.key] || '').trim();
    if (f.required && !v) errs[f.key] = f.label + '不能为空';
    if (f.key === 'email' && v && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(v)) errs[f.key] = '邮箱格式不正确';
  });
  if (Object.keys(errs).length) { errors.value = errs; return; }
  emit('submit', { ...form.value });
  emit('cancel');
}
</script>

<style src="./FormModal.css"></style>
