<template>
  <div class="paper-selector" :class="{ 'horizontal-mode': horizontalMode }">
    <!-- 垂直模式的标题 -->
    <div v-if="!horizontalMode" class="selector-header">
      <h4>纸张设置</h4>
      <el-tooltip content="选择合适的纸张尺寸以获得最佳设计效果" placement="top">
        <i class="el-icon-info"></i>
      </el-tooltip>
    </div>

    <!-- 纸张类型选择 -->
    <div class="paper-type-select">
      <el-select
        :value="normalizedSelectedPaper"
        @change="handlePaperChange"
        placeholder="选择纸张类型"
        size="small"
        :loading="loading"
        :style="horizontalMode ? 'width: 120px;' : 'width: 100%;'"
        filterable
      >
        <el-option
          v-for="option in paperOptions"
          :key="option.value"
          :label="option.label"
          :value="option.value"
        >
          <span style="float: left">{{ option.label }}</span>
          <span v-if="!horizontalMode" style="float: right; color: #8492a6; font-size: 12px">
            {{ option.description }}
          </span>
        </el-option>
      </el-select>
    </div>
  </div>
</template>

<script>
import { getPaperOptions, getCanvasSize, PAPER_SIZES } from '@/utils/paperConfig.js'
import dynamicPaperConfig from '@/utils/paperConfigDynamic.js'

export default {
  name: 'PaperSelector',
  props: {
    selectedPaper: {
      type: [String, Number], // 支持字符串(旧格式)和数字(新的纸张ID)
      default: null
    },
    orientation: {
      type: String,
      default: 'portrait'
    },
    customSize: {
      type: Object,
      default: () => ({ width: 600, height: 400 })
    },
    horizontalMode: {
      type: Boolean,
      default: false
    }
  },
  emits: ['paper-change', 'custom-size-change'],
  data() {
    return {
      dynamicPapers: [], // 动态纸张列表
      loading: false,
      defaultPaperId: null // 默认纸张ID
    }
  },
  async created() {
    await this.loadPapers()
  },
  watch: {
    orientation: {
      handler(newVal, oldVal) {
        if (newVal !== oldVal) {
          // 方向改变时，给用户一个视觉反馈
          this.$nextTick(() => {
            const orientationText = newVal === 'portrait' ? '纵向' : '横向'
            console.log(`打印方向已切换为: ${orientationText}`, {
              orientation: newVal,
              currentSize: this.currentSize
            })
          })
        }
      },
      immediate: false
    }
  },
  computed: {
    paperOptions() {
      return this.dynamicPapers.map(paper => ({
        value: paper.id,
        label: paper.name,
        description: `${paper.widthMm}×${paper.heightMm}mm`,
        paper: paper
      }))
    },
    // 确保选中的纸张ID是正确的类型
    normalizedSelectedPaper() {
      if (this.selectedPaper === null || this.selectedPaper === undefined) {
        return null
      }
      // 如果是字符串类型的数字，转换为数字
      if (typeof this.selectedPaper === 'string' && /^\d+$/.test(this.selectedPaper)) {
        return parseInt(this.selectedPaper, 10)
      }
      return this.selectedPaper
    },

    orientationText() {
      return this.orientation === 'portrait' ? '纵向' : '横向'
    },
    quickSizes() {
      // 从动态纸张中选择常用尺寸
      return this.dynamicPapers.slice(0, 8).map(paper => ({
        value: paper.id,
        label: paper.name.replace('英寸', '').replace('×', '×')
      }))
    },
    // 方向图标
    orientationIcon() {
      return this.orientation === 'portrait' ? 'el-icon-mobile-phone' : 'el-icon-monitor'
    },
  },
  methods: {
    // 加载纸张数据
    async loadPapers() {
      try {
        this.loading = true
        await dynamicPaperConfig.loadPapers()
        this.dynamicPapers = dynamicPaperConfig.getActivePapers()

        // 设置默认纸张ID
        if (this.dynamicPapers.length > 0 && !this.defaultPaperId) {
          // 优先选择4×2英寸作为默认纸张
          const defaultPaper = this.dynamicPapers.find(p => p.name.includes('4×2')) || this.dynamicPapers[0]
          this.defaultPaperId = defaultPaper.id
        }

        console.log('纸张选择器加载完成:', this.dynamicPapers.length, '个纸张')
      } catch (error) {
        console.error('加载纸张数据失败:', error)
        this.$message.error('加载纸张数据失败')
      } finally {
        this.loading = false
      }
    },

    handlePaperChange(paperId) {
      localStorage.setItem('paperId',paperId);
      this.$emit('paper-change', paperId)
    },

    handleOrientationChange(orientation) {
      // 通过父组件处理方向变化
      this.$emit('orientation-change', orientation)
    },

    // 刷新纸张数据
    async refreshPapers() {
      await this.loadPapers()
    },

    // 获取当前选择的纸张对象
    getCurrentPaper() {
      const paperId = this.normalizedSelectedPaper
      if (typeof paperId === 'number') {
        return this.dynamicPapers.find(p => p.id === paperId)
      }
      return null
    }
  }
}
</script>

<style scoped>
.paper-selector {
  padding: 12px;
  background: white;
  border-radius: 4px;
  border: 1px solid #e8e8e8;
  margin-bottom: 12px;
}

.selector-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.selector-header h4 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  color: #333;
}

.selector-header i {
  color: #909399;
  cursor: help;
  font-size: 12px;
}

.paper-type-select {
  margin-bottom: 10px;
}

.custom-size {
  margin-bottom: 10px;
  padding: 8px;
  background: #f8f9fa;
  border-radius: 3px;
}

.size-inputs {
  display: flex;
  gap: 8px;
}

.input-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.input-group label {
  font-size: 11px;
  color: #666;
  font-weight: 500;
}

.canvas-info {
  margin-bottom: 10px;
  padding: 8px;
  background: #f0f9ff;
  border-radius: 3px;
  border-left: 2px solid #409eff;
}

.info-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 3px;
  font-size: 11px;
}

.info-item:last-child {
  margin-bottom: 0;
}

.info-item .label {
  color: #666;
  font-weight: 500;
}

.info-item .value {
  color: #333;
  font-weight: 600;
}

.info-item.description .value {
  color: #909399;
  font-weight: normal;
  font-style: italic;
}

.quick-sizes {
  border-top: 1px solid #e8e8e8;
  padding-top: 8px;
}

.quick-title {
  font-size: 11px;
  color: #666;
  margin-bottom: 6px;
  font-weight: 500;
}

.quick-buttons {
  display: flex;
  flex-wrap: wrap;
}

.quick-buttons .el-button {
  flex: 1;
  min-width: 0;
  font-size: 8px;
  padding: 4px 1px;
  height: 24px;
  line-height: 1;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.quick-buttons .el-button--mini {
  height: 24px;
  padding: 4px 1px;
}

.paper-preview {
  margin-bottom: 10px;
  padding: 8px;
  background: #f8f9fa;
  border-radius: 3px;
  text-align: center;
}

.preview-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 60px;
}

.preview-paper {
  border: 2px solid #409eff;
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.preview-paper.landscape {
  border-color: #67c23a;
}

.preview-label {
  font-size: 9px;
  color: #333;
  font-weight: 600;
  text-align: center;
  line-height: 1.2;
  padding: 2px;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 2px;
}

/* 水平模式样式 */
.paper-selector.horizontal-mode {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 0;
  background: transparent;
  border: none;
  margin-bottom: 0;
}

.horizontal-mode .paper-type-select {
  margin-bottom: 0;
}

.horizontal-mode .orientation-select.horizontal-inline {
  margin-bottom: 0;
}

.horizontal-mode .custom-size,
.horizontal-mode .canvas-info,
.horizontal-mode .quick-sizes,
.horizontal-mode .paper-preview {
  display: none; /* 水平模式下隐藏这些详细信息 */
}
</style>
