<template>
  <div class="merge-coil-container">
    <!-- 顶部操作栏 -->
    <div class="header-bar">
      <div class="header-title">
        <i class="el-icon-connection"></i>
        <span>钢卷合卷</span>
      </div>
      <div class="header-actions">
        <el-button type="primary" size="small" @click="handleSave" :loading="loading">保存合卷</el-button>
        <el-button size="small" @click="handleCancel" :disabled="loading">取消</el-button>
      </div>
    </div>

    <!-- 流程图区域 -->
    <div class="flow-container">
      <!-- 左侧：源卷列表 -->
      <div class="flow-left">
        <div class="flow-section-title">
          <span>源卷列表</span>
          <el-button type="text" size="mini" @click="addSourceCoil" icon="el-icon-plus">添加钢卷</el-button>
        </div>
        
        <div class="source-list">
          <div class="source-coil-card" v-for="(item, index) in sourceCoils" :key="index">
            <div class="source-coil-header">
              <div class="source-number">{{ index + 1 }}</div>
              <div class="source-info">
                <div class="source-id">{{ item.currentCoilNo || '待选择' }}</div>
                <div class="source-weight">{{ item.weight || '—' }} t</div>
              </div>
              <el-button 
                type="text" 
                size="mini" 
                icon="el-icon-delete" 
                @click="removeSourceCoil(index)"
                class="btn-remove"
              ></el-button>
            </div>
            <div class="source-coil-body">
              <el-button type="text" size="small" @click="selectCoil(index)">
                <i class="el-icon-search"></i> 选择钢卷
              </el-button>
            </div>
          </div>
        </div>
      </div>

      <!-- 中间：流程箭头（汇聚） -->
      <div class="flow-middle">
        <div class="merge-arrow-container">
          <svg width="120" height="100%" viewBox="0 0 120 400" xmlns="http://www.w3.org/2000/svg">
            <!-- 多条线汇聚到一点 -->
            <line 
              v-for="(item, index) in sourceCoils" 
              :key="index"
              :x1="0" 
              :y1="50 + index * 80" 
              :x2="100" 
              :y2="200" 
              stroke="#0066cc" 
              stroke-width="2"
              stroke-dasharray="5,5"
            />
            <!-- 箭头 -->
            <polygon points="100,200 110,195 110,205" fill="#0066cc"/>
          </svg>
        </div>
        <div class="flow-label">
          <i class="el-icon-d-arrow-right"></i>
          <span>合并</span>
        </div>
      </div>

      <!-- 右侧：目标卷信息 -->
      <div class="flow-right">
        <div class="flow-section-title">目标卷信息</div>
        <div class="target-coil-card">
          <div class="target-coil-header">
            <i class="el-icon-s-grid"></i>
            <span>新钢卷</span>
          </div>
          <div class="target-coil-body">
            <el-form size="small" label-width="90px">
              <el-form-item label="卷号">
                <el-input v-model="targetCoil.currentCoilNo" placeholder="输入目标卷号"></el-input>
              </el-form-item>
              <el-form-item label="钢种">
                <el-input v-model="targetCoil.grade" placeholder="继承源卷"></el-input>
              </el-form-item>
              <el-form-item label="厚度(mm)">
                <el-input-number 
                  v-model="targetCoil.thickness" 
                  :min="0" 
                  :precision="2"
                  controls-position="right"
                  style="width: 100%"
                ></el-input-number>
              </el-form-item>
              <el-form-item label="宽度(mm)">
                <el-input-number 
                  v-model="targetCoil.width" 
                  :min="0" 
                  :precision="2"
                  controls-position="right"
                  style="width: 100%"
                ></el-input-number>
              </el-form-item>
              <el-form-item label="重量(t)">
                <el-input v-model="totalWeight" disabled></el-input>
              </el-form-item>
            </el-form>
          </div>
        </div>

        <!-- 合卷规则说明 -->
        <div class="rule-card">
          <div class="rule-title">
            <i class="el-icon-warning-outline"></i>
            合卷规则
          </div>
          <ul class="rule-list">
            <li>同一钢种才可合卷</li>
            <li>厚度差异不超过±0.05mm</li>
            <li>宽度必须完全一致</li>
            <li>目标卷重量为源卷总和</li>
          </ul>
        </div>
      </div>
    </div>

    <!-- 钢卷选择器 -->
    <coil-selector
      :visible.sync="coilSelectorVisible"
      @select="handleCoilSelect"
    />
  </div>
</template>

<script>
import { getMaterialCoil, mergeMaterialCoil } from '@/api/wms/coil';
import CoilSelector from '@/components/CoilSelector';

export default {
  name: 'MergeCoil',
  components: {
    CoilSelector
  },
  data() {
    return {
      // 源卷列表
      sourceCoils: [],
      // 目标卷信息
      targetCoil: {
        currentCoilNo: '',
        grade: '',
        thickness: null,
        width: null,
        warehouseId: null,
        team: null,
        itemType: null,
        itemId: null
      },
      loading: false,
      // 钢卷选择器可见性
      coilSelectorVisible: false,
      // 当前选择的源卷索引
      currentSelectIndex: -1
    };
  },
  computed: {
    // 源卷总重量
    totalWeight() {
      return this.sourceCoils.reduce((sum, item) => sum + (Number(item.weight) || 0), 0).toFixed(2);
    }
  },
  created() {
    // 初始化至少2个源卷
    this.sourceCoils = [
      { coilId: null, currentCoilNo: '', grade: '', weight: 0, thickness: null, width: null },
      { coilId: null, currentCoilNo: '', grade: '', weight: 0, thickness: null, width: null }
    ];
  },
  methods: {
    // 添加源卷
    addSourceCoil() {
      this.sourceCoils.push({
        coilId: null,
        currentCoilNo: '',
        grade: '',
        weight: 0,
        thickness: null,
        width: null,
        warehouseId: null,
        team: null,
        itemType: null,
        itemId: null
      });
    },
    
    // 删除源卷
    removeSourceCoil(index) {
      if (this.sourceCoils.length > 2) {
        this.sourceCoils.splice(index, 1);
      } else {
        this.$message.warning('至少需要2个源卷才能合卷');
      }
    },
    
    // 选择钢卷
    selectCoil(index) {
      this.currentSelectIndex = index;
      this.coilSelectorVisible = true;
    },

    // 钢卷选择回调
    handleCoilSelect(coil) {
      const index = this.currentSelectIndex;
      this.$set(this.sourceCoils, index, {
        coilId: coil.coilId,
        currentCoilNo: coil.currentCoilNo || '',
        grade: coil.grade || '',
        weight: coil.weight || 0,
        thickness: coil.thickness,
        width: coil.width,
        warehouseId: coil.warehouseId,
        team: coil.team,
        itemType: coil.itemType,
        itemId: coil.itemId
      });

      // 如果是第一个源卷，自动填充目标卷信息
      if (index === 0) {
        this.targetCoil.grade = coil.grade;
        this.targetCoil.thickness = coil.thickness;
        this.targetCoil.width = coil.width;
        this.targetCoil.warehouseId = coil.warehouseId;
        this.targetCoil.team = coil.team;
        this.targetCoil.itemType = coil.itemType;
        this.targetCoil.itemId = coil.itemId;
      }

      this.$message.success('钢卷选择成功');
    },
    
    // 保存合卷
    async handleSave() {
      // 验证源卷数量
      if (this.sourceCoils.length < 2) {
        this.$message.error('至少需要2个源卷才能合卷');
        return;
      }

      // 验证源卷信息
      for (let i = 0; i < this.sourceCoils.length; i++) {
        const item = this.sourceCoils[i];
        if (!item.coilId) {
          this.$message.error(`第${i + 1}个源卷未选择`);
          return;
        }
      }

      // 验证目标卷卷号
      if (!this.targetCoil.currentCoilNo || this.targetCoil.currentCoilNo.trim() === '') {
        this.$message.error('请输入目标卷卷号');
        return;
      }

      // 验证源卷规格一致性
      const firstCoil = this.sourceCoils[0];
      for (let i = 1; i < this.sourceCoils.length; i++) {
        const coil = this.sourceCoils[i];
        if (coil.grade !== firstCoil.grade) {
          this.$message.error('源卷钢种不一致，无法合卷');
          return;
        }
        if (Math.abs(coil.thickness - firstCoil.thickness) > 0.05) {
          this.$message.error('源卷厚度差异超过±0.05mm，无法合卷');
          return;
        }
        if (coil.width !== firstCoil.width) {
          this.$message.error('源卷宽度不一致，无法合卷');
          return;
        }
      }

      try {
        this.loading = true;

        // 构造合卷数据
        const mergeData = {
          currentCoilNo: this.targetCoil.currentCoilNo,
          grade: this.targetCoil.grade,
          thickness: this.targetCoil.thickness,
          width: this.targetCoil.width,
          weight: Number(this.totalWeight),
          warehouseId: this.targetCoil.warehouseId,
          team: this.targetCoil.team,
          itemType: this.targetCoil.itemType,
          itemId: this.targetCoil.itemId,
          hasMergeSplit: 2, // 2表示合卷
          newCoils: this.sourceCoils.map(item => ({
            coilId: item.coilId,
            currentCoilNo: item.currentCoilNo,
            grade: item.grade,
            thickness: item.thickness,
            width: item.width,
            weight: item.weight
          }))
        };

        const response = await mergeMaterialCoil(mergeData);
        if (response.code === 200) {
          this.$message.success('合卷保存成功');
          // 延迟返回，让用户看到成功提示
          setTimeout(() => {
            this.$router.back();
          }, 1000);
        } else {
          this.$message.error(response.msg || '合卷保存失败');
        }
      } catch (error) {
        this.$message.error('合卷保存失败');
        console.error(error);
      } finally {
        this.loading = false;
      }
    },
    
    // 取消操作
    handleCancel() {
      this.$router.back();
    }
  }
};
</script>

<style scoped lang="scss">
.merge-coil-container {
  padding: 20px;
  background: #f5f7fa;
  min-height: calc(100vh - 84px);
}

/* 顶部操作栏 */
.header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  padding: 16px 20px;
  margin-bottom: 20px;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-title {
  font-size: 18px;
  font-weight: 500;
  color: #303133;
  display: flex;
  align-items: center;
  gap: 8px;
  
  i {
    color: #0066cc;
    font-size: 20px;
  }
}

/* 流程图容器 */
.flow-container {
  display: flex;
  gap: 40px;
  background: #fff;
  padding: 30px;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  min-height: 600px;
}

.flow-left {
  flex: 1;
  max-width: 350px;
}

.flow-middle {
  flex: 0 0 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.flow-right {
  flex: 1;
  max-width: 400px;
}

.flow-section-title {
  font-size: 16px;
  font-weight: 500;
  color: #303133;
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 4px solid #0066cc;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* 源卷列表 */
.source-list {
  max-height: 500px;
  overflow-y: auto;
  padding-right: 10px;
  margin-bottom: 20px;
  
  &::-webkit-scrollbar {
    width: 6px;
  }
  
  &::-webkit-scrollbar-thumb {
    background: #dcdfe6;
    border-radius: 3px;
  }
}

.source-coil-card {
  background: #fff;
  border: 1px solid #e4e7ed;
  border-radius: 8px;
  margin-bottom: 12px;
  transition: all 0.3s;
  
  &:hover {
    border-color: #0066cc;
    box-shadow: 0 2px 8px rgba(0, 102, 204, 0.15);
  }
}

.source-coil-header {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #f5f7fa;
}

.source-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #0066cc;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}

.source-info {
  flex: 1;
  min-width: 0;
}

.source-id {
  font-size: 14px;
  font-weight: 500;
  color: #303133;
  margin-bottom: 4px;
}

.source-weight {
  font-size: 13px;
  color: #909399;
}

.source-coil-body {
  padding: 12px 16px;
  text-align: center;
}

.btn-remove {
  color: #f56c6c;
  padding: 0;
  
  &:hover {
    color: #f56c6c;
  }
}

/* 流程箭头 */
.merge-arrow-container {
  width: 100%;
  height: 100%;
}

.flow-label {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: #ecf5ff;
  color: #0066cc;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid #d9ecff;
}

/* 目标卷卡片 */
.target-coil-card {
  background: #fff;
  border: 2px solid #0066cc;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
  margin-bottom: 20px;
}

.target-coil-header {
  background: #0066cc;
  color: #fff;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
}

.target-coil-body {
  padding: 20px;
}

/* 规则说明卡片 */
.rule-card {
  background: #fff9f0;
  border: 1px solid #ffe9c2;
  border-radius: 8px;
  padding: 16px;
}

.rule-title {
  font-size: 14px;
  font-weight: 500;
  color: #e6a23c;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.rule-list {
  padding-left: 20px;
  margin: 0;
  
  li {
    color: #606266;
    font-size: 13px;
    line-height: 24px;
  }
}
</style>

