<template>
  <div class="kole-dropdown" ref="root">
    <div class="kole-dropdown-trigger" @click="open = !open">
      <slot>操作</slot>
    </div>
    <div v-show="open" class="kole-dropdown-panel">
      <template v-for="(item, i) in items" :key="item.key || 'd' + i">
        <div v-if="item.divider" class="kole-dropdown-divider"></div>
        <div
          v-else
          class="kole-dropdown-item"
          :class="{ 'is-danger': item.danger, 'is-disabled': item.disabled }"
          @click="onClick(item)"
        >
          <span v-if="item.icon" class="ico">{{ item.icon }}</span>
          {{ item.label }}
        </div>
      </template>
    </div>
  </div>
</template>

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

defineProps({
  items: { type: Array, default: () => [] }   // [{ key, label, danger, disabled, divider, icon }]
});
const emit = defineEmits(['select']);

const open = ref(false);
const root = ref(null);

function onClick(item) {
  if (item.disabled || item.divider) return;
  emit('select', item.key != null ? item.key : item.label);
  open.value = false;
}
function onDocClick(e) {
  if (root.value && !root.value.contains(e.target)) open.value = false;
}
onMounted(() => document.addEventListener('click', onDocClick));
onBeforeUnmount(() => document.removeEventListener('click', onDocClick));
</script>

<!-- 样式对齐 组件2.txt Dropdown 规范 -->
<style scoped>
.kole-dropdown { position: relative; display: inline-block; }
.kole-dropdown-trigger {
  border: 1px solid #E8ECF1; background: #fff; border-radius: 4px; height: 32px; padding: 0 12px;
  cursor: pointer; font-size: 14px; color: #262626; display: inline-flex; align-items: center; gap: 4px;
}
.kole-dropdown-trigger:hover { border-color: #2F54EB; }
.kole-dropdown-panel {
  position: absolute; z-index: 20; top: calc(100% + 4px); left: 0; min-width: 120px;
  background: #fff; border-radius: 6px; box-shadow: 0 4px 12px rgba(0,0,0,0.08); padding: 4px 0;
}
.kole-dropdown-item {
  display: flex; align-items: center; gap: 8px; height: 32px; padding: 0 12px; cursor: pointer;
  font-size: 14px; color: #262626; white-space: nowrap;
}
.kole-dropdown-item:hover { background: #F5F7FA; }
.kole-dropdown-item.is-danger { color: #CF1322; }
.kole-dropdown-item.is-disabled { color: #BFBFBF; cursor: not-allowed; }
.kole-dropdown-item.is-disabled:hover { background: transparent; }
.kole-dropdown-divider { height: 1px; background: #F0F0F0; margin: 4px 0; }
</style>
