<template>
  <div class="grid-4">
    <div
      v-for="s in students"
      :key="s.userId"
      class="student-card"
      :class="['status-' + s.status]"
      @click="$emit('click', s)"
    >
      <div class="avatar" :class="'avatar-' + s.status">
        {{ s.name.charAt(0) }}
      </div>
      <span class="name">{{ s.name }}</span>
      <span v-if="s.status === 'submitted'" class="indicator check">✓</span>
      <span v-else-if="s.status === 'unsubmitted'" class="indicator dot pulse" />
      <span v-else class="indicator dash">—</span>
    </div>
  </div>
</template>

<script lang="ts" setup>
import type { ClassStudentSummary } from './types'

defineProps<{ students: ClassStudentSummary[] }>()
defineEmits<{ click: [student: ClassStudentSummary] }>()
</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 .15s ease;
  background: #fff;
  border: 2px solid transparent;

  &:hover { box-shadow: 0 2px 8px rgba(0,0,0,.08); }

  &.status-submitted   { border-color: #facc15; }
  &.status-unsubmitted { 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: 12px;
  font-weight: 600;
}
.avatar-submitted   { background: #facc15; color: #111827; }
.avatar-unsubmitted { background: #fef3c7; color: #92400e; }
.avatar-not_started { background: #e5e7eb; color: #6b7280; }

.name {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  color: #111827;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.status-not_started .name { color: #9ca3af; }

.indicator {
  flex-shrink: 0;
  font-size: 12px;
}
.indicator.check { color: #ca8a04; font-weight: 600; }
.indicator.dash  { color: #9ca3af; }

.indicator.dot.pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #fbbf24;
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .4; }
}
</style>
