<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>
export default {
  name: 'KoleCollapse',
  props: {
    value: { type: [Array, String], 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 }
  },
  computed: {
    openList() {
      return this.accordion
        ? (this.value ? [this.value] : [])
        : Array.isArray(this.value) ? this.value : [];
    }
  },
  methods: {
    isOpen(key) { return this.openList.includes(key); },
    toggle(item) {
      if (item.disabled) return;
      let next;
      if (this.accordion) {
        next = this.isOpen(item.key) ? [] : [item.key];
      } else {
        next = this.isOpen(item.key)
          ? this.openList.filter(k => k !== item.key)
          : [...this.openList, item.key];
      }
      this.$emit('input', this.accordion ? (next[0] || '') : next);
      this.$emit('change', this.accordion ? (next[0] || '') : next);
    }
  }
};
</script>

<!-- 样式对齐 组件2.txt 规范 -->
<style>
.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>
