<template>
  <div class="kole-collapse">
    <div
      v-for="item in items" :key="item.key"
      class="kole-collapse-item"
      :class="{ 'is-open': isOpen(item.key), 'is-disabled': item.disabled }"
    >
      <div class="kole-collapse-header" @click="toggle(item)">
        <span class="kole-collapse-arrow">▶</span>
        <span class="kole-collapse-title">{{ item.title }}</span>
      </div>
      <div v-show="isOpen(item.key)" class="kole-collapse-content">
        <slot :name="item.key"><slot /></slot>
      </div>
    </div>
  </div>
</template>

<script setup>
import { computed } from 'vue';

const props = defineProps({
  modelValue: { type: [Array, String, null], default: () => [] },  // 展开 key 列表（手风琴时为单个 key）
  items: { type: Array, required: true },                          // [{ key, title, disabled? }]
  accordion: { type: Boolean, default: false }
});
const emit = defineEmits(['update:modelValue', 'change']);

const openList = computed(() =>
  props.accordion
    ? (props.modelValue ? [props.modelValue] : [])
    : Array.isArray(props.modelValue) ? props.modelValue : []
);
function isOpen(key) { return openList.value.includes(key); }

function toggle(item) {
  if (item.disabled) return;
  let next;
  if (props.accordion) {
    next = isOpen(item.key) ? [] : [item.key];
  } else {
    next = isOpen(item.key)
      ? openList.value.filter(k => k !== item.key)
      : [...openList.value, item.key];
  }
  emit('update:modelValue', props.accordion ? (next[0] ?? '') : next);
  emit('change', props.accordion ? (next[0] ?? '') : next);
}
</script>

<!-- 样式对齐 组件2.txt 规范 -->
<style scoped>
.kole-collapse { border: 1px solid #E8ECF1; border-radius: 6px; overflow: hidden; font-family: var(--font-family, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif); color: #262626; background: #fff; }
.kole-collapse-item + .kole-collapse-item { border-top: 1px solid #E8ECF1; }
.kole-collapse-header { display: flex; align-items: center; gap: 8px; height: 40px; padding: 0 16px; cursor: pointer;
  font-size: 14px; color: #262626; background: #fff; transition: background .15s; user-select: none; }
.kole-collapse-header:hover { background: #F5F7FA; }
.kole-collapse-item.is-disabled .kole-collapse-header { color: #BFBFBF; cursor: not-allowed; background: #fff; }
.kole-collapse-arrow { display: inline-flex; align-items: center; justify-content: center; width: 16px; height: 16px;
  color: #6E6E6E; font-size: 12px; transition: transform .2s ease; transform: rotate(0deg); }
.kole-collapse-item.is-open .kole-collapse-arrow { transform: rotate(90deg); }
.kole-collapse-title { flex: 1; }
.kole-collapse-content { padding: 16px; font-size: 14px; line-height: 1.6; color: #595959; border-top: 1px solid #E8ECF1; background: #fff; }
.kole-collapse-item.is-disabled .kole-collapse-content { color: #BFBFBF; }
</style>
