<template>
  <div class="container toBuildforms">
    <div class="left-board">
      <div class="logo-wrapper">
        <div class="logo"></div>
      </div>
      <el-scrollbar class="left-scrollbar">
        <div class="components-list">
          <div class="components-title">
            输入型组件
          </div>
          <draggable class="components-draggable" :list="inputComponents" :group="{ name: 'componentsGroup', pull: 'clone', put: false }" :clone="cloneComponent" draggable=".components-item" :sort="false" @end="onEnd">
            <div v-for="(element, index) in inputComponents" :key="index" class="components-item" @click="addComponent(element)">
              <div class="components-body">
                {{ element.label }}
              </div>
            </div>
          </draggable>
          <div class="components-title">
            选择型组件
          </div>
          <draggable class="components-draggable" :list="selectComponents" :group="{ name: 'componentsGroup', pull: 'clone', put: false }" :clone="cloneComponent" draggable=".components-item" :sort="false" @end="onEnd">
            <div v-for="(element, index) in selectComponents" :key="index" class="components-item" @click="addComponent(element)">
              <div class="components-body">
                {{ element.label }}
              </div>
            </div>
          </draggable>
          <div class="components-title">
            自定义组件
          </div>
          <draggable class="components-draggable" :list="layoutComponents" :group="{ name: 'componentsGroup', pull: 'clone', put: false }" :clone="cloneComponent" draggable=".components-item" :sort="false" @end="onEnd">
            <div v-for="(element, index) in layoutComponents" :key="index" class="components-item" @click="addComponent(element)">
              <div class="components-body">
                {{ element.label }}
              </div>
            </div>
          </draggable>
          <div v-if="!fromEdit" class="components-title">
            自定义组件套
            <span class="add-btn" @click="addSuiteComponents()">
              <i class="el-icon-circle-plus-outline" />
            </span>
          </div>
          <draggable class="components-draggable" :list="suiteComponents" :group="{ name: 'componentsGroup', pull: 'clone', put: false }" :clone="cloneComponent" draggable=".components-item" :sort="false" @end="onEnd">
            <div v-for="(element, index) in suiteComponents" :key="index" class="components-item" @click="addComponent(element)">
              <div class="components-body components-body-suite" :title="element.label">
                {{ format(element.label) }}
              </div>
            </div>
          </draggable>
        </div>
      </el-scrollbar>
    </div>

    <div class="center-board">

      <div class="action-bar">
        <!-- <el-button icon="el-icon-download" type="text" @click="download">
          显示提交数据
        </el-button> -->
        <i class="el-icon-view info">表示在用户展示过程中隐藏效果的组件</i>
        <el-button class="delete-btn" icon="el-icon-delete" type="text" @click="empty">
          清空
        </el-button>
      </div>
      <el-scrollbar class="center-scrollbar">
        <el-row class="center-board-row" :gutter="formConf.gutter">
          <el-form :size="formConf.size" :model="formItem" :label-position="formConf.labelPosition" :disabled="formConf.disabled" :label-width="formConf.labelWidth + 'px'">
            <draggable class="drawing-board" :list="drawingList" :animation="340" group="componentsGroup">
              <comItem v-for="(element,index) in drawingList" :form='formItem' :key="element.formId" :config='element' :drawing-list="drawingList" :index="index" :active-id="activeId" :form-conf="formConf" @activeItem="activeFormItem" @copyItem="drawingItemCopy" @deleteItem="drawingItemDelete" />
            </draggable>
            <div v-show="!drawingList.length" class="empty-info">
              从左侧拖入或点选组件进行表单设计
            </div>
          </el-form>
        </el-row>
      </el-scrollbar>
    </div>

    <right-panel :active-data="activeData" :form-conf="formConf" :flowConfig='flowConfig' :form='form' :drawingList='drawingList' :show-field="!!drawingList.length" @tag-change="tagChange" />

    <code-type-dialog :visible.sync="dialogVisible" title="提交字段" :form='formData' :show-file-name="showFileName" @confirm="generate" />

    <suite-component-drawer :visible.sync="suiteVisible" title="组件套管理" />
  </div>
</template>

<script>
import draggable from 'vuedraggable'
import RightPanel from './RightPanel.vue'
import {
  inputComponents,
  selectComponents,
  layoutComponents,
  formConf
} from '../utils/generator/config.js'
import { titleCase } from '../utils/index.js'
import { getList } from '../api/suite.js'
import CodeTypeDialog from './CodeTypeDialog.vue'
import DraggableItem from './DraggableItem.vue'
import ComItem from './ComItems.vue'
import SuiteComponentDrawer from './SuiteComponentDrawer.vue'

let oldActiveId
let tempActiveData

export default {
  name: "mgAsyncForm",
  components: {
    draggable,
    ComItem,
    RightPanel,
    CodeTypeDialog,
    DraggableItem,
    SuiteComponentDrawer
  },
  props: ['form', 'flowConfig', 'fromEdit'],
  data() {
    return {
      idGlobal: 100,
      formConf,
      inputComponents,
      selectComponents,
      layoutComponents,
      suiteComponents: [],
      labelWidth: 100,
      drawingList: [],
      drawingData: {},
      activeId: 0,
      drawerVisible: false,
      formData: {},
      formItem: {},
      dialogVisible: false,
      generateConf: null,
      showFileName: false,
      activeData: {},
      suiteVisible: false
    }
  },
  created() {
    // 防止 firefox 下 拖拽 会新打卡一个选项卡
    if (this.form.attributes) {
      let temp = JSON.parse(this.form.attributes)
      temp.fields = temp.fields || []
      this.formConf = temp
      this.drawingList = temp.fields
    }
    document.body.ondrop = event => {
      event.preventDefault()
      event.stopPropagation()
    }
    if (!this.fromEdit) {
      // 获取用户新增的自定义组件
      this.getSuiteComponents()
    }
  },
  watch: {
    // eslint-disable-next-line func-names
    'activeData.label': function (val, oldVal) {
      if (
        this.activeData.placeholder === undefined ||
        !this.activeData.tag ||
        oldActiveId !== this.activeId
      ) {
        return
      }
      this.activeData.placeholder =
        this.activeData.placeholder.replace(oldVal, '') + val
    },
    activeId: {
      handler(val) {
        oldActiveId = val
      },
      immediate: true
    },
    suiteVisible(bool) {
      if (!bool) {
        this.getSuiteComponents()
      }
    }
  },
  mounted() { },
  methods: {
    activeFormItem(element) {
      if (!element.btn) {
        this.$set(element, 'btn', { label: '按钮', href: '' })
      }
      this.activeData = element
      this.activeId = element.formId
    },
    onEnd(obj, a) {
      if (obj.from !== obj.to) {
        this.activeData = tempActiveData
        this.activeId = this.idGlobal
      }
    },
    addComponent(item) {
      const clone = this.cloneComponent(item)
      this.drawingList.push(clone)
      this.activeFormItem(clone)
    },
    cloneComponent(origin) {
      const clone = JSON.parse(JSON.stringify(origin))
      clone.formId = new Date().getTime()
      clone.span = formConf.span
      clone.renderKey = +new Date() // 改变renderKey后可以实现强制更新组件
      this.idGlobal = new Date().getTime()
      if (!clone.layout) clone.layout = 'colFormItem'
      if (clone.layout === 'colFormItem') {
        clone.vModel = `field${this.idGlobal}`
        clone.placeholder !== undefined && (clone.placeholder += clone.label)
        tempActiveData = clone
      } else if (clone.layout === 'rowFormItem') {
        delete clone.label
        clone.componentName = `row${this.idGlobal}`
        clone.gutter = this.formConf.gutter
        tempActiveData = clone
      }
      return tempActiveData
    },
    AssembleFormData() {
      let result = true,
        drawMap = {}
      this.drawingList.forEach(drawing => {
        if (!drawMap[drawing.vModel]) {
          drawMap[drawing.vModel] = true
        } else {
          this.$message.error(drawing.label + '字段名已存在')
          result = false
        }
        let map = {}
        if (drawing.options) {
          drawing.options.forEach(item => {
            if (!map[item.value]) {
              map[item.value] = true
            } else {
              this.$message.error(drawing.label + '选项值重复')
              result = false
            }
          })
        }
      })

      if (result) {
        this.formData = {
          fields: JSON.parse(JSON.stringify(this.drawingList)),
          ...this.formConf
        }
      } else {
        this.formData = false
      }
      return this.formData
    },
    generate(data) {
      const func = this[`exec${titleCase(this.operationType)}`]
      this.generateConf = data
      func && func(data)
    },
    empty() {
      this.$confirm('确定要清空所有组件吗？', '提示', { type: 'warning' }).then(
        () => {
          this.drawingList = []
        }
      )
    },
    drawingItemCopy(item) {
      console.log(item)
      let clone = JSON.parse(JSON.stringify(item))
      clone = this.createIdAndKey(clone)
      this.drawingList.push(clone)
      this.activeFormItem(clone)
    },
    createIdAndKey(item) {
      item.formId = ++this.idGlobal
      item.renderKey = +new Date()
      if (item.layout === 'colFormItem') {
        item.vModel = `field${this.idGlobal}`
      } else if (item.layout === 'rowFormItem') {
        item.componentName = `row${this.idGlobal}`
      }
      if (Array.isArray(item.children)) {
        item.children = item.children.map(childItem =>
          this.createIdAndKey(childItem)
        )
      }
      return item
    },
    drawingItemDelete(index) {
      this.drawingList.splice(index, 1)
    },
    download() {
      this.AssembleFormData()
      this.dialogVisible = true
      this.showFileName = true
      this.operationType = 'download'
    },
    tagChange(newTag) {
      newTag = this.cloneComponent(newTag)
      newTag.vModel = this.activeData.vModel
      newTag.formId = this.activeId
      newTag.span = this.activeData.span
      delete this.activeData.tag
      delete this.activeData.tagIcon
      delete this.activeData.document
      Object.keys(newTag).forEach(key => {
        if (
          this.activeData[key] !== undefined &&
          typeof this.activeData[key] === typeof newTag[key]
        ) {
          newTag[key] = this.activeData[key]
        }
      })
      this.activeData = newTag
      this.updateDrawingList(newTag, this.drawingList)
    },
    updateDrawingList(newTag, list) {
      const index = list.findIndex(item => item.formId === this.activeId)
      if (index > -1) {
        list.splice(index, 1, newTag)
      } else {
        list.forEach(item => {
          if (Array.isArray(item.children))
            this.updateDrawingList(newTag, item.children)
        })
      }
    },
    getSuiteComponents() {
      this.suiteComponents = []
      getList({ page: 1, page_size: 9999, pageSize: 9999, pageNum: 1 }).then(
        res => {
          const { records } = res.data
          records.map(item => {
            this.suiteComponents.push({
              label: item.name,
              tag: 's-' + item.id,
              apiList: [],
              regList: [],
              defaultValue: undefined
            })
          })
        }
      )
    },
    addSuiteComponents() {
      this.suiteVisible = true
    },
    // 截取组件套名称的长度，显示省略号
    format(str) {
      let label = str
      if (label.length > 14) {
        label = label.substring(0, 14) + '...'
      }
      return label
    }
  }
}
</script>

<style lang='less'>
.toBuildforms {
  position: relative;

  .editor-tabs {
    background: #121315;
    .el-tabs__header {
      margin: 0;
      border-bottom-color: #121315;
      .el-tabs__nav {
        border-color: #121315;
      }
    }
    .el-tabs__item {
      height: 32px;
      line-height: 32px;
      color: #888a8e;
      border-left: 1px solid #121315 !important;
      background: #363636;
      margin-right: 5px;
      user-select: none;
    }
    .el-tabs__item.is-active {
      background: #1e1e1e;
      border-bottom-color: #1e1e1e !important;
      color: #fff;
    }
    .el-icon-edit {
      color: #f1fa8c;
    }
    .el-icon-document {
      color: #a95812;
    }
  }

  // home
  .right-scrollbar {
    .el-scrollbar__view {
      padding: 12px 18px 15px 15px;
    }
  }
  .left-scrollbar .el-scrollbar__wrap {
    box-sizing: border-box;
    overflow-x: hidden !important;
    margin-bottom: 0 !important;
  }
  .center-tabs {
    .el-tabs__header {
      margin-bottom: 0 !important;
    }
    .el-tabs__item {
      width: 50%;
      text-align: center;
    }
    .el-tabs__nav {
      width: 100%;
    }
  }
  .reg-item {
    padding: 12px 6px;
    background: #f8f8f8;
    position: relative;
    border-radius: 4px;
    .close-btn {
      position: absolute;
      right: -6px;
      top: -6px;
      display: block;
      width: 16px;
      height: 16px;
      line-height: 16px;
      background: rgba(0, 0, 0, 0.2);
      border-radius: 50%;
      color: #fff;
      text-align: center;
      z-index: 1;
      cursor: pointer;
      font-size: 12px;
      &:hover {
        background: rgba(210, 23, 23, 0.5);
      }
    }
    & + .reg-item {
      margin-top: 18px;
    }
  }
  .action-bar {
    & .el-button + .el-button {
      margin-left: 15px;
    }
    & i {
      font-size: 20px;
      vertical-align: middle;
      position: relative;
      top: -1px;
    }
    .info {
      font-size: 12px;
      float: left;
      margin-top: 15px;
    }
  }

  .custom-tree-node {
    width: 100%;
    font-size: 14px;
    .node-operation {
      float: right;
    }
    i[class*='el-icon'] + i[class*='el-icon'] {
      margin-left: 6px;
    }
    .el-icon-plus {
      color: #409eff;
    }
    .el-icon-delete {
      color: #157a0c;
    }
  }

  .left-scrollbar .el-scrollbar__view {
    overflow-x: hidden;
  }

  .el-rate {
    display: inline-block;
    vertical-align: text-top;
  }
  .el-upload__tip {
    line-height: 1.2;
  }

  @selectedColor: #f6f7ff;
  @lighterBlue: #409eff;

  .container {
    position: relative;
    width: 100%;
    height: 100%;
  }

  .components-list {
    padding: 8px;
    box-sizing: border-box;
    height: 100%;
    background-color: #f8f8f8;
    .components-item {
      display: inline-block;
      width: 48%;
      margin: 1%;
      transition: transform 0ms !important;
    }
  }
  .components-draggable {
    padding-bottom: 20px;
  }
  .components-title {
    font-size: 14px;
    color: #222;
    margin: 6px 2px;
  }

  .components-body {
    padding: 8px 10px;
    font-size: 12px;
    cursor: move;
    background-color: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 3px;
    &:hover {
      border: 1px dashed #787be8;
      color: #787be8;
    }
  }

  .components-body-suite {
    height: 46px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .left-board {
    width: 260px;
    position: absolute;
    left: 0;
    top: 0;
    height: 100vh;
  }
  .left-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
  }
  .center-scrollbar {
    height: calc(100vh - 42px);
    overflow: hidden;
    border-left: 1px solid #e8e8e8;
    border-right: 1px solid #e8e8e8;
    box-sizing: border-box;
  }
  .center-board {
    height: 100vh;
    width: auto;
    margin: 0 350px 0 260px;
    box-sizing: border-box;
  }
  .empty-info {
    position: absolute;
    top: 46%;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 18px;
    color: #ccb1ea;
    letter-spacing: 4px;
  }
  .action-bar {
    position: relative;
    height: 42px;
    text-align: right;
    padding: 0 15px;
    box-sizing: border-box;
    border: 1px solid #e8e8e8;
    border-top: none;
    border-left: none;
    .delete-btn {
      color: #f56c6c;
    }
  }
  .logo-wrapper {
    position: relative;
    height: 42px;
    background: #fff;
    border-bottom: 1px solid #e8e8e8;
    box-sizing: border-box;
  }
  .logo {
    position: absolute;
    left: 12px;
    top: 6px;
    line-height: 30px;
    color: #00afff;
    font-weight: 600;
    font-size: 17px;
    white-space: nowrap;
    > img {
      width: 30px;
      height: 30px;
      vertical-align: top;
    }
    .github {
      display: inline-block;
      vertical-align: sub;
      margin-left: 15px;
      > img {
        height: 22px;
      }
    }
  }

  .center-board-row {
    padding: 12px 12px 15px 12px;
    box-sizing: border-box;
    & > .el-form {
      // 69 = 12+15+42
      height: calc(100vh - 69px);
    }
  }
  .drawing-board {
    height: 100%;
    position: relative;
    .components-body {
      padding: 0;
      margin: 0;
      font-size: 0;
    }
    .sortable-ghost {
      position: relative;
      display: block;
      overflow: hidden;
      &::before {
        content: ' ';
        position: absolute;
        left: 0;
        right: 0;
        top: 0;
        height: 3px;
        background: rgb(89, 89, 223);
        z-index: 2;
      }
    }
    .components-item.sortable-ghost {
      width: 100%;
      height: 60px;
      background-color: @selectedColor;
    }
    .active-from-item {
      & > .el-form-item {
        background: @selectedColor;
        border-radius: 6px;
      }
      & > .drawing-item-copy,
      & > .drawing-item-delete {
        display: initial;
      }
      & > .component-name {
        color: @lighterBlue;
      }
    }
    .el-form-item {
      margin-bottom: 15px;
    }
  }
  .drawing-item {
    position: relative;
    cursor: move;
    &.unfocus-bordered:not(.activeFromItem) > div:first-child {
      border: 1px dashed #ccc;
    }
    .el-form-item {
      padding: 12px 10px;
    }
  }
  .drawing-row-item {
    position: relative;
    cursor: move;
    box-sizing: border-box;
    border: 1px dashed #ccc;
    border-radius: 3px;
    padding: 0 2px;
    margin-bottom: 15px;
    .drawing-row-item {
      margin-bottom: 2px;
    }
    .el-col {
      margin-top: 22px;
    }
    .el-form-item {
      margin-bottom: 0;
    }
    .drag-wrapper {
      min-height: 80px;
    }
    &.active-from-item {
      border: 1px dashed @lighterBlue;
    }
    .component-name {
      position: absolute;
      top: 0;
      left: 0;
      font-size: 12px;
      color: #bbb;
      display: inline-block;
      padding: 0 6px;
    }
  }
  .drawing-item,
  .drawing-row-item {
    &:hover {
      & > .el-form-item {
        background: @selectedColor;
        border-radius: 6px;
      }
      & > .drawing-item-copy,
      & > .drawing-item-delete {
        display: initial;
      }
    }
    & > .drawing-item-copy,
    & > .drawing-item-delete {
      display: none;
      position: absolute;
      top: -10px;
      width: 22px;
      height: 22px;
      line-height: 22px;
      text-align: center;
      border-radius: 50%;
      font-size: 12px;
      border: 1px solid;
      cursor: pointer;
      z-index: 1;
    }
    & > .drawing-item-copy {
      right: 56px;
      border-color: @lighterBlue;
      color: @lighterBlue;
      background: #fff;
      &:hover {
        background: @lighterBlue;
        color: #fff;
      }
    }
    & > .drawing-item-delete {
      right: 24px;
      border-color: #f56c6c;
      color: #f56c6c;
      background: #fff;
      &:hover {
        background: #f56c6c;
        color: #fff;
      }
    }
  }
  .add-btn {
    cursor: pointer;
    color: @lighterBlue;
  }
}
</style>
