import { h, inject, VNode, ref, Ref, onMounted, onUnmounted } from 'vue'
import { defineVxeComponent } from '../../ui/src/comp'
import { VxeUI } from '@vxe-ui/core'
import XEUtils from 'xe-utils'
import { getCellRestHeight, hasMilestoneTask, getTaskType, hasSubviewTask } from './util'
import { getStringValue, isEnableConf, hasEnableConf } from '../../ui/src/utils'

import type { VxeComponentStyleType } from 'vxe-pc-ui'
import type { VxeTableConstructor, VxeTableMethods, VxeTablePrivateMethods } from 'vxe-table'
import type { VxeGanttViewConstructor, VxeGanttViewPrivateMethods, VxeGanttConstructor, VxeGanttPrivateMethods } from '../../../types'

const { getIcon, renderEmptyElement } = VxeUI

const sourceType = 'gantt'
const viewType = 'chart'

export default defineVxeComponent({
  name: 'VxeGanttViewChart',
  setup () {
    const $xeGantt = inject('$xeGantt', {} as (VxeGanttConstructor & VxeGanttPrivateMethods))
    const $xeGanttView = inject('$xeGanttView', {} as VxeGanttViewConstructor & VxeGanttViewPrivateMethods)

    const { props: ganttProps, context: ganttContext, reactData: ganttReactData, internalData: ganttInternalData } = $xeGantt
    const { reactData: ganttViewReactData, internalData: ganttViewInternalData } = $xeGanttView
    const { computeProgressField, computeTitleField, computeTypeField, computeTaskBarOpts, computeScaleUnit, computeTaskLinkOpts, computeTaskBarMilestoneOpts, computeTaskBarSubviewOpts } = $xeGantt.getComputeMaps()
    const { computeNowLineLeft } = $xeGanttView.getComputeMaps()

    const refElem = ref<HTMLDivElement>()
    const refTaskWrapperElem = ref() as Ref<HTMLDivElement>
    const refChartBeforeWrapperElem = ref() as Ref<HTMLDivElement>
    const refChartAfterWrapperElem = ref() as Ref<HTMLDivElement>
    const refNowLineElem = ref() as Ref<HTMLDivElement>

    const renderTaskBar = ($xeTable: VxeTableConstructor & VxeTableMethods & VxeTablePrivateMethods, row: any, rowid: string, rowIndex: number, $rowIndex: number, _rowIndex: number, rowChildren: any[], isExpandTree: boolean) => {
      const tableReactData = $xeTable.reactData
      const { resizeHeightFlag, pendingRowFlag } = tableReactData
      const tableInternalData = $xeTable.internalData
      const { fullAllDataRowIdData, pendingRowMaps } = tableInternalData
      const { computeCellOpts, computeRowOpts, computeDefaultRowHeight } = $xeTable.getComputeMaps()
      const cellOpts = computeCellOpts.value
      const rowOpts = computeRowOpts.value
      const defaultRowHeight = computeDefaultRowHeight.value
      const { computeTreeOpts } = $xeTable.getComputeMaps()
      const treeOpts = computeTreeOpts.value
      const childrenField = treeOpts.children || treeOpts.childrenField

      const ganttSlots = $xeGantt.context.slots
      const taskBarSlot = ganttSlots.taskBar || ganttSlots['task-bar']
      const taskBarOverviewSlot = ganttSlots.taskBarOverview || ganttSlots['task-bar-overview']

      const { treeConfig, taskBarMilestoneConfig, taskBarSubviewConfig } = ganttProps
      const { activeLink, activeBarRowid } = ganttReactData
      const titleField = computeTitleField.value
      const progressField = computeProgressField.value
      const typeField = computeTypeField.value
      const taskBarOpts = computeTaskBarOpts.value
      const taskBarMilestoneOpts = computeTaskBarMilestoneOpts.value
      const taskBarSubviewOpts = computeTaskBarSubviewOpts.value
      const { showOverview, barStyle: subBarStyle } = taskBarSubviewOpts
      const scaleUnit = computeScaleUnit.value
      const barParams = { $gantt: $xeGantt, row, scaleType: scaleUnit }
      const { showProgress, showContent, contentMethod, barStyle, moveable, showTooltip } = taskBarOpts
      const isBarRowStyle = XEUtils.isFunction(barStyle)
      const barStyObj = (barStyle ? (isBarRowStyle ? barStyle(barParams) || undefined : barStyle) : {}) || {}
      const { round } = barStyObj

      const rowRest = fullAllDataRowIdData[rowid] || {}
      const cellHeight = resizeHeightFlag ? getCellRestHeight(rowRest, cellOpts, rowOpts, defaultRowHeight) : 0

      let title = getStringValue(XEUtils.get(row, titleField))
      const progressValue = showProgress ? Math.min(100, Math.max(0, XEUtils.toNumber(XEUtils.get(row, progressField)))) : 0
      const renderTaskType = getTaskType(XEUtils.get(row, typeField))

      const vbStyle: VxeComponentStyleType = {}
      const vpStyle: VxeComponentStyleType = {
        width: `${progressValue || 0}%`
      }
      if (isBarRowStyle) {
        const { bgColor, completedBgColor } = barStyObj
        if (bgColor) {
          vbStyle.backgroundColor = bgColor
        }
        if (completedBgColor) {
          vpStyle.backgroundColor = completedBgColor
        }
      }

      const ctParams = {
        $gantt: $xeGantt,
        source: sourceType,
        type: viewType,
        scaleType: scaleUnit,
        row,
        $rowIndex,
        rowIndex,
        _rowIndex
      }

      let cbVNs: VNode[] = []
      if ($xeGantt.renderGanttTaskBarContent) {
        cbVNs = $xeGantt.renderGanttTaskBarContent(ctParams, {
          $gantt: $xeGantt,
          $table: $xeTable,
          rowid
        })
      } else {
        const isMilestone = !!(hasEnableConf(taskBarMilestoneConfig, taskBarMilestoneOpts) && hasMilestoneTask(renderTaskType))
        const isSubview = !!(hasEnableConf(taskBarSubviewConfig, taskBarSubviewOpts) && hasSubviewTask(renderTaskType))

        if (contentMethod) {
          title = getStringValue(contentMethod({ row, title, scaleType: scaleUnit }))
        }

        const ctOns: {
          onMouseover?: any
          onMouseleave?: any
        } = {}
        if (showTooltip) {
          ctOns.onMouseover = (evnt: MouseEvent) => {
            const { dragBarRow } = ganttInternalData
            const ttParams = Object.assign({ $event: evnt }, ctParams)
            if (!dragBarRow) {
              $xeGantt.triggerTaskBarTooltipEvent(evnt, ttParams)
            }
            $xeGantt.dispatchEvent('task-bar-mouseenter', ttParams, evnt)
          }
          ctOns.onMouseleave = (evnt: MouseEvent) => {
            const { dragBarRow } = ganttInternalData
            const ttParams = Object.assign({ $event: evnt }, ctParams)
            if (!dragBarRow) {
              $xeGantt.handleTaskBarTooltipLeaveEvent(evnt, ttParams)
            }
            $xeGantt.dispatchEvent('task-bar-mouseleave', ttParams, evnt)
          }
        }

        if (isSubview && treeConfig && rowChildren && rowChildren.length) {
          if (isExpandTree) {
            if (showOverview) {
              cbVNs.push(
                h('div', {
                  key: 'vcso',
                  class: 'vxe-gantt-view--chart-subview-wrapper is--overview'
                }, [
                  h('div', {
                    key: rowid,
                    rowid: rowid,
                    class: ['vxe-gantt-view--chart-subview-row', {
                      'is--progress': showProgress,
                      'is--round': round,
                      'is--move': moveable
                    }]
                  }, [
                    h('div', {
                      rowid: rowid,
                      class: [taskBarOverviewSlot ? 'vxe-gantt-view--chart-subview-custom-bar' : 'vxe-gantt-view--chart-subview-bar', `is--${renderTaskType}`]
                    }, [
                      taskBarOverviewSlot
                        ? h('div', {
                          key: 'cbc',
                          class: 'vxe-gantt-view--chart-subview-custom-bar-content-wrapper'
                        }, $xeGantt.callSlot(taskBarOverviewSlot, barParams))
                        : h('div', {
                          class: 'vxe-gantt-view--chart-subview-bar-content-wrapper'
                        }, [
                          showContent
                            ? h('div', {
                              class: 'vxe-gantt-view--chart-content'
                            }, title)
                            : renderEmptyElement($xeGantt)
                        ])
                    ])
                  ])
                ])
              )
            }
          } else {
            const cbcVNs: VNode[] = []
            XEUtils.eachTree(rowChildren, childRow => {
              const childBarParams = { $gantt: $xeGantt, row: childRow, scaleType: scaleUnit }
              const childBarStyObj = (barStyle ? (isBarRowStyle ? barStyle(childBarParams) : barStyle) : {}) || {}
              const { round } = childBarStyObj

              const childRowid = $xeTable.getRowid(childRow)
              let childTitle = getStringValue(XEUtils.get(childRow, titleField))
              const childProgressValue = showProgress ? Math.min(100, Math.max(0, XEUtils.toNumber(XEUtils.get(childRow, progressField)))) : 0
              const childRenderTaskType = getTaskType(XEUtils.get(childRow, typeField))
              const isChildSubview = !!(hasEnableConf(taskBarSubviewConfig, taskBarSubviewOpts) && hasSubviewTask(childRenderTaskType))

              if (isChildSubview) {
                return
              }

              const childVbStyle: VxeComponentStyleType = {}
              const childVpStyle: VxeComponentStyleType = {
                width: `${childProgressValue || 0}%`
              }
              if (isBarRowStyle) {
                const { bgColor, completedBgColor } = childBarStyObj
                if (bgColor) {
                  childVbStyle.backgroundColor = bgColor
                }
                if (completedBgColor) {
                  childVpStyle.backgroundColor = completedBgColor
                }
              }

              const childCtParams = XEUtils.assign({}, ctParams, {
                row: childRow,
                rowIndex: $xeTable.getRowIndex(childRow),
                $rowIndex: $xeTable.getVMRowIndex(childRow),
                _rowIndex: $xeTable.getVTRowIndex(childRow)
              })

              if (contentMethod) {
                childTitle = getStringValue(contentMethod({ row: childRow, title: childTitle, scaleType: scaleUnit }))
              }

              cbcVNs.push(
                h('div', {
                  key: childRowid,
                  rowid: childRowid,
                  class: ['vxe-gantt-view--chart-subview-row', `is--${childRenderTaskType}`, {
                    'is--progress': showProgress,
                    'is--round': round,
                    'is--move': moveable,
                    'row--pending': !!pendingRowFlag && !!pendingRowMaps[childRowid]
                  }]
                }, [
                  h('div', {
                    rowid: childRowid,
                    class: [taskBarSlot ? 'vxe-gantt-view--chart-subview-custom-bar' : 'vxe-gantt-view--chart-subview-bar', `is--${childRenderTaskType}`],
                    style: subBarStyle ? (XEUtils.isFunction(subBarStyle) ? subBarStyle(childCtParams) : subBarStyle) : undefined,
                    onClick (evnt: MouseEvent) {
                      evnt.stopPropagation()
                      $xeGantt.handleTaskBarClickEvent(evnt, childCtParams)
                    },
                    onDblclick (evnt: MouseEvent) {
                      evnt.stopPropagation()
                      $xeGantt.handleTaskBarDblclickEvent(evnt, childCtParams)
                    },
                    onMousedown (evnt: MouseEvent) {
                      evnt.stopPropagation()
                      if ($xeGantt.handleTaskBarMousedownEvent) {
                        $xeGantt.handleTaskBarMousedownEvent(evnt, childCtParams)
                      }
                    }
                  }, [
                    taskBarSlot
                      ? h('div', {
                        key: 'cbc',
                        class: 'vxe-gantt-view--chart-subview-custom-bar-content-wrapper',
                        ...ctOns
                      }, $xeGantt.callSlot(taskBarSlot, childCtParams))
                      : h('div', {
                        class: 'vxe-gantt-view--chart-subview-bar-content-wrapper',
                        ...ctOns
                      }, [
                        showProgress
                          ? h('div', {
                            class: 'vxe-gantt-view--chart-progress',
                            style: childVpStyle
                          })
                          : renderEmptyElement($xeGantt),
                        showContent
                          ? h('div', {
                            class: 'vxe-gantt-view--chart-content'
                          }, childTitle)
                          : renderEmptyElement($xeGantt)
                      ])
                  ])
                ])
              )
            }, { children: childrenField })

            cbVNs.push(
              h('div', {
                key: 'vcsc',
                class: 'vxe-gantt-view--chart-subview-wrapper is--inline'
              }, cbcVNs)
            )
          }
        } else {
          if (taskBarSlot) {
            cbVNs.push(
              h('div', {
                key: 'cbc',
                class: 'vxe-gantt-view--chart-custom-bar-content-wrapper',
                ...ctOns
              }, $xeGantt.callSlot(taskBarSlot, barParams))
            )
          } else if (isMilestone) {
            const { icon, iconStatus, iconStyle } = taskBarMilestoneOpts
            const tbmParams = { $gantt: $xeGantt, row }
            cbVNs.push(
              h('div', {
                key: 'vcm',
                class: 'vxe-gantt-view--chart-milestone-wrapper',
                ...ctOns
              }, [
                h('div', {
                  class: ['vxe-gantt-view--chart-milestone-icon', iconStatus ? `theme--${XEUtils.isFunction(iconStatus) ? iconStatus(tbmParams) : iconStatus}` : ''],
                  style: iconStyle ? Object.assign({}, XEUtils.isFunction(iconStyle) ? iconStyle(tbmParams) : iconStyle) : undefined
                }, [
                  h('i', {
                    class: (icon ? (XEUtils.isFunction(icon) ? icon(tbmParams) : icon) : '') || getIcon().GANTT_VIEW_TASK_MILESTONE
                  })
                ]),
                showContent
                  ? h('div', {
                    class: 'vxe-gantt-view--chart-milestone-content'
                  }, title)
                  : renderEmptyElement($xeGantt)
              ])
            )
          } else {
            cbVNs.push(
              h('div', {
                key: 'vbc',
                class: 'vxe-gantt-view--chart-bar-content-wrapper',
                ...ctOns
              }, [
                showProgress
                  ? h('div', {
                    class: 'vxe-gantt-view--chart-progress',
                    style: vpStyle
                  })
                  : renderEmptyElement($xeGantt),
                showContent
                  ? h('div', {
                    class: 'vxe-gantt-view--chart-content'
                  }, title)
                  : renderEmptyElement($xeGantt)
              ])
            )
          }
        }
      }

      return h('div', {
        key: rowid,
        rowid,
        class: ['vxe-gantt-view--chart-row', `is--${renderTaskType}`, {
          'is--progress': showProgress,
          'row--pending': !!pendingRowFlag && !!pendingRowMaps[rowid],
          'is--round': round,
          'is--move': moveable
        }],
        style: {
          height: `${cellHeight}px`
        },
        onDragstart (evnt) {
          if (ganttInternalData.dragBarRow) {
            evnt.preventDefault()
          }
        },
        onContextmenu (evnt) {
          $xeGantt.handleTaskBarContextmenuEvent(evnt, ctParams)
        }
      }, [
        h('div', {
          class: [taskBarSlot ? 'vxe-gantt-view--chart-custom-bar' : 'vxe-gantt-view--chart-bar', `is--${renderTaskType}`, {
            'is--active': activeBarRowid === rowid,
            'active--link': activeLink && (rowid === `${activeLink.from}` || rowid === `${activeLink.to}`)
          }],
          style: vbStyle,
          rowid,
          onClick (evnt: MouseEvent) {
            $xeGantt.handleTaskBarClickEvent(evnt, barParams)
          },
          onDblclick (evnt: MouseEvent) {
            $xeGantt.handleTaskBarDblclickEvent(evnt, barParams)
          },
          onMousedown (evnt: MouseEvent) {
            if ($xeGantt.handleTaskBarMousedownEvent) {
              $xeGantt.handleTaskBarMousedownEvent(evnt, barParams)
            }
          }
        }, cbVNs)
      ])
    }

    const renderTaskRows = ($xeTable: VxeTableConstructor & VxeTableMethods & VxeTablePrivateMethods, tableData: any[]) => {
      const tableProps = $xeTable.props
      const { treeConfig } = tableProps
      const tableReactData = $xeTable.reactData
      const { treeExpandedFlag } = tableReactData
      const tableInternalData = $xeTable.internalData
      const { fullAllDataRowIdData, treeExpandedMaps } = tableInternalData
      const { computeTreeOpts } = $xeTable.getComputeMaps()
      const treeOpts = computeTreeOpts.value
      const { transform } = treeOpts
      const childrenField = treeOpts.children || treeOpts.childrenField

      const { scrollYLoad } = ganttViewReactData

      const trVNs: VNode[] = []
      tableData.forEach((row, $rowIndex) => {
        const rowid = $xeTable.getRowid(row)
        const rowRest = fullAllDataRowIdData[rowid] || {}
        let rowIndex = $rowIndex
        let _rowIndex = -1
        if (rowRest) {
          rowIndex = rowRest.index
          _rowIndex = rowRest._index
        }
        let isExpandTree = false
        let rowChildren: any[] = []

        if (treeConfig) {
          rowChildren = row[childrenField]
          isExpandTree = !!treeExpandedFlag && rowChildren && rowChildren.length > 0 && !!treeExpandedMaps[rowid]
        }

        trVNs.push(renderTaskBar($xeTable, row, rowid, rowIndex, $rowIndex, _rowIndex, rowChildren, isExpandTree))

        // 如果是树形表格
        if (treeConfig && isExpandTree && !scrollYLoad && !transform) {
          trVNs.push(...renderTaskRows($xeTable, rowChildren))
        }
      })
      return trVNs
    }

    const renderVN = () => {
      const $xeTable = ganttViewInternalData.xeTable

      const { slots: ganttSlots } = ganttContext

      const { dragLinkFromStore } = ganttReactData
      const { tableData } = ganttViewReactData
      const taskLinkOpts = computeTaskLinkOpts.value
      const taskBarOpts = computeTaskBarOpts.value
      const nowLineLeft = computeNowLineLeft.value
      const { isCurrent, isHover } = taskLinkOpts
      const { linkCreatable } = taskBarOpts
      const taskNowLineSlot = ganttSlots.taskNowLine || ganttSlots['task-now-line']

      return h('div', {
        ref: refElem,
        class: ['vxe-gantt-view--chart-wrapper', {
          'is--cl-drag': dragLinkFromStore.rowid
        }]
      }, [
        nowLineLeft > 0
          ? h('div', {
            ref: refNowLineElem,
            class: 'vxe-gantt-view--chart-now-line',
            style: {
              left: nowLineLeft + 'px'
            }
          }, taskNowLineSlot ? taskNowLineSlot({}) : [])
          : renderEmptyElement($xeGantt),
        $xeGantt.renderGanttTaskChartBefores
          ? h('div', {
            ref: refChartBeforeWrapperElem,
            class: ['vxe-gantt-view--chart-before-wrapper', {
              'link--current': isCurrent,
              'link--hover': isHover
            }]
          }, $xeTable && isEnableConf(taskLinkOpts) ? $xeGantt.renderGanttTaskChartBefores() : [])
          : renderEmptyElement($xeGantt),
        h('div', {
          ref: refTaskWrapperElem,
          class: ['vxe-gantt-view--chart-task-wrapper', {
            'link--current': isCurrent,
            'link--create': linkCreatable
          }]
        }, $xeTable ? renderTaskRows($xeTable, tableData) : []),
        $xeGantt.renderGanttTaskChartAfters
          ? h('div', {
            ref: refChartAfterWrapperElem,
            class: 'vxe-gantt-view--chart-after-wrapper'
          }, $xeTable && isEnableConf(taskLinkOpts) ? $xeGantt.renderGanttTaskChartAfters() : [])
          : renderEmptyElement($xeGantt)
      ])
    }

    onMounted(() => {
      const { elemStore } = ganttViewInternalData
      const prefix = 'main-chart-'
      elemStore[`${prefix}now-line`] = refNowLineElem
      elemStore[`${prefix}task-wrapper`] = refTaskWrapperElem
      elemStore[`${prefix}before-wrapper`] = refChartBeforeWrapperElem
      elemStore[`${prefix}after-wrapper`] = refChartAfterWrapperElem
    })

    onUnmounted(() => {
      const { elemStore } = ganttViewInternalData
      const prefix = 'main-chart-'
      elemStore[`${prefix}now-line`] = null
      elemStore[`${prefix}task-wrapper`] = null
      elemStore[`${prefix}before-wrapper`] = null
      elemStore[`${prefix}after-wrapper`] = null
    })

    return renderVN
  }
})