<template>
  <div class="grid-4">
    <div
      v-for="student in students"
      :key="student.userId"
      class="student-card"
      :class="'status-' + student.status"
      @click="$emit('click', student)"
    >
      <div class="avatar" :class="'avatar-' + student.status">
        {{ student.name.charAt(0) }}
      </div>
      <!-- 完成态与其余状态同形：只有名字，分数在个人报告弹窗里看（spec §8） -->
      <span class="name">{{ student.name }}</span>
      <span v-if="student.status === 'completed'" class="indicator check">✓</span>
      <span v-else-if="student.status === 'reading'" class="indicator dot pulse"></span>
      <span v-else class="indicator dash">—</span>
    </div>
  </div>
</template>

<script lang="ts" setup>
import type { ArticleClassSessionSummary } from '@/types/articleReading'

defineProps<{ students: ArticleClassSessionSummary[] }>()
defineEmits<{ click: [student: ArticleClassSessionSummary] }>()
</script>

<style lang="scss" scoped>
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.student-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: box-shadow 0.15s ease;
  background: #fff;
  border: 2px solid transparent;

  &:hover { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); }

  &.status-completed { border-color: #facc15; }
  &.status-reading { border-color: #fde68a; }
  &.status-not_started {
    background: #f3f4f6;
    border: 2px dashed #9ca3af;
  }
}

.avatar {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: #d1d5db;

  &.avatar-completed { background: #f59e0b; }
  &.avatar-reading { background: #fbbf24; }
}

.name {
  flex: 1;
  min-width: 0;
  font-size: 13px;
  color: #111827;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.indicator {
  flex-shrink: 0;
  font-size: 12px;

  &.check { color: #16a34a; }
  &.dash { color: #9ca3af; }

  &.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #fbbf24;
  }

  &.pulse { animation: article-class-pulse 1.4s ease-in-out infinite; }
}

@keyframes article-class-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
</style>
