import curves from '@ohos.curves'
import { AddFormMenuItem } from '@kit.ArkUI'
import { formBindingData } from '@kit.FormKit'
import { getCount, IBestToast } from 'basic'

@Component
export struct MainView {
  @Prop displayArr: getCount[] = []
  columnsTemplate: string = '1fr 1fr'
  @BuilderParam item: () => void
  private columnsCount: number = 0
  @State private dragItemId: number = -1
  @State private scaleItemId: number = -1
  @State private offsetX: number = 0
  @State private offsetY: number = 0
  private dragRefOffsetx: number = 0
  private dragRefOffsety: number = 0
  private FIX_VP_X: number = 108
  private FIX_VP_Y: number = 120

  aboutToAppear() {
    const temArr: number[] = Array.from({ length: 11 })
    temArr.forEach((item, index) => {
      this.displayArr.push({ id: index })
    })


    this.columnsCount = this.columnsTemplate.split(' ').length

  }

  itemMove(index: number, newIndex: number): void {
    if (!this.isDraggable(newIndex)) {
      return;
    }

    // 创建临时数组
    const newNumbers = [...this.displayArr];
    const movedItem = newNumbers.splice(index, 1)[0]; // 直接获取数组第一个元素
    newNumbers.splice(newIndex, 0, movedItem);
    this.displayArr = newNumbers;
  }

  //向下滑
  down(index: number): void {
    // 指定固定GridItem不响应事件
    if (!this.isDraggable(index + this.columnsCount)) {
      return
    }
    this.offsetY -= this.FIX_VP_Y
    this.dragRefOffsety += this.FIX_VP_Y
    this.itemMove(index, index + this.columnsCount)
  }

  //向下滑(右下角为空)
  // down2(index: number): void {
  //   if (!this.isDraggable(index + this.columnsCount)) {
  //     return
  //   }
  //   this.offsetY -= this.FIX_VP_Y
  //   this.dragRefOffsety += this.FIX_VP_Y
  //   this.itemMove(index, index + this.columnsCount)
  // }

  //向上滑
  up(index: number): void {
    if (!this.isDraggable(index - this.columnsCount)) {
      return
    }
    this.offsetY += this.FIX_VP_Y
    this.dragRefOffsety -= this.FIX_VP_Y
    this.itemMove(index, index - this.columnsCount)
  }

  //向左滑
  left(index: number): void {
    if (!this.isDraggable(index - 1)) {
      return
    }
    this.offsetX += this.FIX_VP_X
    this.dragRefOffsetx -= this.FIX_VP_X
    this.itemMove(index, index - 1)
  }

  //向右滑
  right(index: number): void {
    if (!this.isDraggable(index + 1)) {
      return
    }
    this.offsetX -= this.FIX_VP_X
    this.dragRefOffsetx += this.FIX_VP_X
    this.itemMove(index, index + 1)
  }

  //向右下滑
  lowerRight(index: number): void {
    if (!this.isDraggable(index + this.columnsCount + 1)) {
      return
    }
    this.offsetX -= this.FIX_VP_X
    this.dragRefOffsetx += this.FIX_VP_X
    this.offsetY -= this.FIX_VP_Y
    this.dragRefOffsety += this.FIX_VP_Y
    this.itemMove(index, index + this.columnsCount + 1)
  }

  //向右上滑
  upperRight(index: number): void {
    if (!this.isDraggable(index - this.columnsCount + 1)) {
      return
    }
    this.offsetX -= this.FIX_VP_X
    this.dragRefOffsetx += this.FIX_VP_X
    this.offsetY += this.FIX_VP_Y
    this.dragRefOffsety -= this.FIX_VP_Y
    this.itemMove(index, index - this.columnsCount + 1)
  }

  //向左下滑
  lowerLeft(index: number): void {
    if (!this.isDraggable(index + 2)) {
      return
    }
    this.offsetX += this.FIX_VP_X
    this.dragRefOffsetx -= this.FIX_VP_X
    this.offsetY -= this.FIX_VP_Y
    this.dragRefOffsety += this.FIX_VP_Y
    this.itemMove(index, index + this.columnsCount - 1)
  }

  //向左上滑
  upperLeft(index: number): void {
    if (!this.isDraggable(index - this.columnsCount - 1)) {
      return
    }
    this.offsetX += this.FIX_VP_X
    this.dragRefOffsetx -= this.FIX_VP_X
    this.offsetY += this.FIX_VP_Y
    this.dragRefOffsety -= this.FIX_VP_Y
    this.itemMove(index, index - this.columnsCount - 1)
  }

  isDraggable(index: number): boolean {
    return index >= 0 && index < this.displayArr.length
  }

  build() {
    Column() {
      Grid() {
        ForEach(this.displayArr, (item: getCount, index) => {
          GridItem() {
            Text(item + '')
              .fontSize(16)
              .width('100%')
              .height('100%')
              .bindContextMenu(
                this.menu_4,
                ResponseType.LongPress, {
                placement: Placement.TopLeft,
              })
              .textAlign(TextAlign.Center)
              .borderRadius(10)
              .backgroundColor(0xF9CF93)
              .shadow(this.scaleItemId == item.id ? {
                radius: 70,
                color: '#15000000',
                offsetX: 0,
                offsetY: 0
              } :
                {
                  radius: 0,
                  color: '#15000000',
                  offsetX: 0,
                  offsetY: 0
                })
              .animation({ curve: Curve.Sharp, duration: 300 })
            // this.item()
          }
          .aspectRatio(1)
          // 指定固定GridItem不响应事件
          .hitTestBehavior(this.isDraggable(this.displayArr.indexOf(item)) ? HitTestMode.Default : HitTestMode.None)
          .scale({ x: this.scaleItemId == item.id ? 1.05 : 1, y: this.scaleItemId == item.id ? 1.05 : 1 })
          .zIndex(this.dragItemId === item.id ? 1 : 0)
          .translate(this.dragItemId === item.id ? { x: this.offsetX, y: this.offsetY } : { x: 0, y: 0 })
          .onAreaChange((_, newArea) => {
            if (index == 0) {
              this.FIX_VP_X = newArea.width as number
              this.FIX_VP_Y = newArea.height as number
            }
          })
          .gesture(
            // 以下组合手势为顺序识别，当长按手势事件未正常触发时则不会触发拖动手势事件
            GestureGroup(GestureMode.Sequence,
              LongPressGesture({ repeat: true })
                .onAction((event?: GestureEvent) => {
                  animateTo({ curve: Curve.Friction, duration: 300 }, () => {
                    this.scaleItemId = item.id
                  })
                })
                .onActionEnd(() => {
                  animateTo({ curve: Curve.Friction, duration: 300 }, () => {
                    this.scaleItemId = -1
                  })
                }),
              PanGesture({ fingers: 1, direction: null, distance: 0 })
                .onActionStart(() => {
                  this.dragItemId = item.id
                  this.dragRefOffsetx = 0
                  this.dragRefOffsety = 0
                })
                .onActionUpdate((event: GestureEvent) => {
                  this.offsetY = event.offsetY - this.dragRefOffsety
                  this.offsetX = event.offsetX - this.dragRefOffsetx

                  let index = this.displayArr.findIndex(item => item.id == this.dragItemId)
                  if (this.offsetY >= this.FIX_VP_Y / 2 && (this.offsetX <= 44 && this.offsetX >= -44) &&
                    !this.isLastRow(index)) {
                    //向下滑
                    this.down(index)
                  } else if (this.offsetY <= -this.FIX_VP_Y / 2 && (this.offsetX <= 44 && this.offsetX >= -44) &&
                    !this.isFirstRow(index)) {
                    //向上滑
                    this.up(index)
                  } else if (this.offsetX >= this.FIX_VP_X / 2 && (this.offsetY <= 50 && this.offsetY >= -50) &&
                    !this.isLastColumn(index)) {
                    //向右滑
                    this.right(index)
                  } else if (this.offsetX <= -this.FIX_VP_X / 2 && (this.offsetY <= 50 && this.offsetY >= -50) &&
                    !this.isFirstColumn(index)) {
                    //向左滑
                    this.left(index)
                  } else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2 &&
                    !this.isLastRow(index) && !this.isLastColumn(index)) {
                    //向右下滑
                    this.lowerRight(index)
                  } else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY <= -this.FIX_VP_Y / 2 &&
                    !this.isFirstRow(index) && !this.isLastColumn(index)) {
                    //向右上滑
                    this.upperRight(index)
                  } else if (this.offsetX <= -this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2 &&
                    !this.isLastRow(index) && !this.isFirstColumn(index)) {
                    //向左下滑
                    this.lowerLeft(index)
                  } else if (this.offsetX <= -this.FIX_VP_X / 2 && this.offsetY <= -this.FIX_VP_Y / 2 &&
                    !this.isFirstRow(index) && !this.isFirstColumn(index)) {
                    //向左上滑
                    this.upperLeft(index)
                  } else if (this.offsetX >= this.FIX_VP_X / 2 && this.offsetY >= this.FIX_VP_Y / 2 &&
                  this.isLastRow(index) && this.isFirstColumn(index)) {
                    //右下角为空的情况
                    this.down(index)
                  }

                })
                .onActionEnd(() => {
                  animateTo({ curve: Curve.Linear, duration: 150 }, () => { // 缩短时间并简化曲线
                    this.dragItemId = -1;
                  });
                })
            )
              .onCancel(() => {
                animateTo({ curve: curves.interpolatingSpring(0, 1, 400, 38) }, () => {
                  this.dragItemId = -1;
                })
                animateTo({
                  curve: curves.interpolatingSpring(14, 1, 170, 17)
                }, () => {
                  this.scaleItemId = -1
                })
              })
          )
        })
      }
      .width('100%')
      .editMode(true)
      .columnsGap(20)
      .rowsGap(20)
      .scrollBar(BarState.Off)
      .columnsTemplate(this.columnsTemplate)
    }.width('100%').height('100%').backgroundColor('#0D182431').padding({ top: 5 })
  }

  @Builder
  menu_4() {
    this.basicMenu('card_4', 4, 'fuWidget')
  }

  @Builder
  basicMenu(compId: string, form_dimension: number, form_name: string) {
    Menu() {
      AddFormMenuItem(
        {
          bundleName: 'com.ytpm.xjlrl', // 包名
          abilityName: 'EntryFormAbility', // 模块ability名称
          parameters: {
            'ohos.extra.param.key.form_dimension': form_dimension, // 卡片尺寸，1代表1*2卡片，2代表2*2卡片，3代表2*4卡片，4代表4*4卡片，7代表6*4卡片，6代表1*1卡片
            'ohos.extra.param.key.form_name': form_name, // 卡片名称
            'ohos.extra.param.key.module_name': 'entry' // 卡片所属的模块名称
          },
        },
        compId,
        {
          formBindingData: formBindingData.createFormBindingData({ data: 'share' }),
          // formBindingData: formBindingData.createFormBindingData({ data: 'share' }),
          callback: (error, formId) => {
            if (!error) {
              IBestToast.show("添加成功")
            }

          },
          style: {
            options: {
              // startIcon: $r("app.media.icon"), // 菜单图标,可以自己提供。系统默认采用"sys.media.ic_public_add"
              content: "添加到桌面", // 菜单内容，可以自己提供。默认使用"sys.string.ohos_add_form_to_desktop"
              // endIcon: $r("app.media.icon") // 菜单图标，可以自己提供
            }
          }
        }
      )
    }
  }

  // 新增辅助方法：检查当前项是否在最后一行
  private isLastRow(index: number): boolean {
    const rowIndex = Math.floor(index / this.columnsCount);
    const totalRows = Math.ceil(this.displayArr.length / this.columnsCount);
    return rowIndex === totalRows - 1;
  }

  // 检查是否在第一行
  private isFirstRow(index: number): boolean {
    return Math.floor(index / this.columnsCount) === 0;
  }

  // 检查是否在最后一列
  private isLastColumn(index: number): boolean {
    return index % this.columnsCount === this.columnsCount - 1;
  }

  // 检查是否在第一列
  private isFirstColumn(index: number): boolean {
    return index % this.columnsCount === 0;
  }
}