<template>
  <div class="exam-system">
    <!-- 头部标题 -->
    <header class="header">
      <div class="logo">
        <span class="icon">📋</span>
        <span class="title">股票知识评测系统</span>
      </div>
      <div class="subtitle">全方面评估您股票知识水平，还能个性化学习建议</div>
    </header>

    <div class="main-content">
      <!-- 左侧题目区域 -->
      <div class="left-panel">
        <!-- 题目显示区 -->
        <div class="question-area">
          <div class="question-header">
            <input type="text" v-model="searchText" placeholder="搜索题目..." class="search-input" />
          </div>
          
          <div class="question-content">
            <h3 class="question-title">{{ currentQuestion.title }}</h3>
            
            <div class="options">
              <div 
                v-for="option in currentQuestion.options" 
                :key="option.key"
                class="option-item"
                :class="{ 'selected': selectedAnswer === option.key }"
                @click="selectAnswer(option.key)"
              >
                <span class="radio-btn" :class="{ 'checked': selectedAnswer === option.key }"></span>
                <span class="option-label">{{ option.key }}. {{ option.text }}</span>
              </div>
            </div>
          </div>
        </div>

        <!-- 答题卡预览区 -->
        <div class="answer-preview">
          <div class="preview-content">
            <!-- 可以显示答题进度或其他信息 -->
          </div>
        </div>

        <!-- 底部按钮 -->
        <div class="bottom-actions">
          <button class="btn btn-secondary" @click="submitExam">提交</button>
          <button class="btn btn-primary" @click="previousQuestion">← 上一题</button>
          <button class="btn btn-primary" @click="nextQuestion">下一题 →</button>
        </div>
      </div>

      <!-- 右侧答题卡 -->
      <div class="right-panel">
        <div class="answer-card">
          <div class="card-header">
            <span class="folder-icon">📁</span>
            <span class="card-title">试题导航</span>
          </div>
          
          <div class="card-grid">
            <div 
              v-for="(item, index) in totalQuestions" 
              :key="index"
              class="grid-item"
              :class="getQuestionStatus(index)"
              @click="jumpToQuestion(index)"
            >
              {{ index + 1 }}
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { ref, computed } from 'vue'

// 搜索文本
const searchText = ref('')

// 当前题目索引
const currentQuestionIndex = ref(0)

// 用户答案记录
const userAnswers = ref({})

// 选中的答案
const selectedAnswer = ref('')

// 总题目数
const totalQuestions = ref(25)

// 题目数据（示例）
const questions = ref([
  {
    id: 1,
    title: '以下哪个不属于股票的基本特征？',
    options: [
      { key: 'A', text: '收益性' },
      { key: 'B', text: '风险性' },
      { key: 'C', text: '流动性' },
      { key: 'D', text: '确定性' }
    ]
  },
  {
    id: 2,
    title: '股票市场的主要功能是什么？',
    options: [
      { key: 'A', text: '资金融通' },
      { key: 'B', text: '价格发现' },
      { key: 'C', text: '资源配置' },
      { key: 'D', text: '以上都是' }
    ]
  }
  // 可以添加更多题目...
])

// 当前题目
const currentQuestion = computed(() => {
  return questions.value[currentQuestionIndex.value] || questions.value[0]
})

// 选择答案
const selectAnswer = (answer) => {
  selectedAnswer.value = answer
  userAnswers.value[currentQuestionIndex.value] = answer
}

// 上一题
const previousQuestion = () => {
  if (currentQuestionIndex.value > 0) {
    currentQuestionIndex.value--
    selectedAnswer.value = userAnswers.value[currentQuestionIndex.value] || ''
  }
}

// 下一题
const nextQuestion = () => {
  if (currentQuestionIndex.value < questions.value.length - 1) {
    currentQuestionIndex.value++
    selectedAnswer.value = userAnswers.value[currentQuestionIndex.value] || ''
  }
}

// 跳转到指定题目
const jumpToQuestion = (index) => {
  currentQuestionIndex.value = index
  selectedAnswer.value = userAnswers.value[index] || ''
}

// 获取题目状态
const getQuestionStatus = (index) => {
  if (index === currentQuestionIndex.value) {
    return 'current'
  }
  if (userAnswers.value[index]) {
    return 'answered'
  }
  return ''
}

// 提交考试
const submitExam = () => {
  const answeredCount = Object.keys(userAnswers.value).length
  if (answeredCount < questions.value.length) {
    if (confirm(`您还有 ${questions.value.length - answeredCount} 道题未作答，确定要提交吗？`)) {
      // 提交逻辑
      console.log('提交答案：', userAnswers.value)
    }
  } else {
    // 提交逻辑
    console.log('提交答案：', userAnswers.value)
  }
}
</script>

<style scoped>
.exam-system {
  min-height: 100vh;
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: #fff;
  font-family: 'Microsoft YaHei', Arial, sans-serif;
}

.header {
  padding: 20px 40px;
  background: rgba(0, 0, 0, 0.2);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 8px;
}

.icon {
  font-size: 28px;
}

.subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin-left: 38px;
}

.main-content {
  display: flex;
  gap: 20px;
  padding: 20px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.left-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.question-area {
  background: rgba(20, 40, 80, 0.6);
  border: 1px solid rgba(100, 150, 200, 0.3);
  border-radius: 8px;
  padding: 20px;
}

.question-header {
  margin-bottom: 20px;
}

.search-input {
  width: 100%;
  padding: 10px 15px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(100, 150, 200, 0.3);
  border-radius: 4px;
  color: #fff;
  font-size: 14px;
}

.search-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.question-content {
  padding: 20px 0;
}

.question-title {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  margin-bottom: 20px;
  font-weight: normal;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.option-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 15px;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(100, 150, 200, 0.3);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
}

.option-item:hover {
  background: rgba(100, 150, 200, 0.2);
  border-color: rgba(100, 150, 200, 0.5);
}

.option-item.selected {
  background: rgba(220, 80, 80, 0.3);
  border-color: rgba(220, 80, 80, 0.6);
}

.radio-btn {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  display: inline-block;
  position: relative;
  flex-shrink: 0;
}

.radio-btn.checked {
  border-color: #e74c3c;
  background: #e74c3c;
}

.radio-btn.checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
}

.option-label {
  font-size: 15px;
}

.answer-preview {
  background: rgba(20, 40, 80, 0.6);
  border: 1px solid rgba(100, 150, 200, 0.3);
  border-radius: 8px;
  padding: 20px;
  min-height: 150px;
}

.bottom-actions {
  display: flex;
  gap: 15px;
  justify-content: flex-start;
}

.btn {
  padding: 12px 30px;
  border: none;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
  font-weight: 500;
}

.btn-primary {
  background: rgba(60, 120, 180, 0.8);
  color: #fff;
}

.btn-primary:hover {
  background: rgba(60, 120, 180, 1);
}

.btn-secondary {
  background: rgba(60, 120, 180, 0.8);
  color: #fff;
}

.btn-secondary:hover {
  background: rgba(70, 130, 190, 1);
}

.right-panel {
  width: 280px;
  flex-shrink: 0;
}

.answer-card {
  background: rgba(20, 40, 80, 0.6);
  border: 1px solid rgba(100, 150, 200, 0.3);
  border-radius: 8px;
  padding: 20px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid rgba(100, 150, 200, 0.2);
}

.folder-icon {
  font-size: 20px;
}

.card-title {
  color: #6db3f2;
  font-size: 16px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.grid-item {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(60, 120, 180, 0.6);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 14px;
}

.grid-item:hover {
  background: rgba(60, 120, 180, 0.8);
  transform: scale(1.05);
}

.grid-item.current {
  background: #3498db;
  box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

.grid-item.answered {
  background: rgba(60, 120, 180, 0.8);
}

.grid-item:nth-child(1) {
  background: #e74c3c;
}

.grid-item:nth-child(2) {
  background: #27ae60;
}
</style>
