import { useRecoilValue } from 'recoil'
import { canvasState, dotLineGridSettingState } from '@/store/canvasAtom'
import { useEffect } from 'react'
import { gridColorState } from '@/store/gridAtom'
import { gridDisplaySelector } from '@/store/settingAtom'
const GRID_PADDING = 5
export function useGrid() {
  const canvas = useRecoilValue(canvasState)

  const dotLineGridSetting = useRecoilValue(dotLineGridSettingState)
  const gridColor = useRecoilValue(gridColorState)
  const isGridDisplay = useRecoilValue(gridDisplaySelector)

  useEffect(() => {
    if (!canvas) {
      return
    }
    const patternData = {
      dotGridDisplay: dotLineGridSetting.DOT,
      lineGridDisplay: dotLineGridSetting.LINE,
      gridType: dotLineGridSetting.INTERVAL.type,
      gridHorizon: dotLineGridSetting.INTERVAL.horizontalInterval / 10,
      gridVertical: dotLineGridSetting.INTERVAL.verticalInterval / 10,
      gridRatio: dotLineGridSetting.INTERVAL.ratioInterval / 10,
      gridDimen: dotLineGridSetting.INTERVAL.dimension,
    }

    // 1. 점.선 그리드 설정으로 만들어진 기존 오브젝트 제거
    canvas
      ?.getObjects()
      .filter((obj) => obj.name === 'lineGrid')
      .forEach((obj) => canvas?.remove(obj))
    canvas
      ?.getObjects()
      .filter((obj) => obj.name === 'dotGrid')
      .forEach((obj) => canvas?.remove(obj))

    //const horizontalInterval = interval.horizontalInterval
    //const verticalInterval = interval.verticalInterval

    if (patternData.dotGridDisplay) {
      const circle = new fabric.Circle({
        radius: 2,
        fill: 'red',
        strokeWidth: 0.7,
        originX: 'center',
        originY: 'center',
        selectable: false,
        lockMovementX: true,
        lockMovementY: true,
        lockRotation: true,
        lockScalingX: true,
        lockScalingY: true,
      })

      const patternSourceCanvas = new fabric.StaticCanvas(null, {
        width: patternData.gridHorizon,
        height: patternData.gridVertical,
      })

      patternSourceCanvas.add(circle)

      circle.set({
        left: patternSourceCanvas.width / 2,
        top: patternSourceCanvas.height / 2,
      })

      patternSourceCanvas.renderAll()

      const pattern = new fabric.Pattern({
        source: patternSourceCanvas.getElement(),
        repeat: 'repeat',
      })

      const backgroundPolygon = new fabric.Polygon(
        [
          { x: 0, y: 0 },
          { x: canvas.width, y: 0 },
          { x: canvas.width, y: canvas.height },
          { x: 0, y: canvas.height },
        ],
        {
          fill: pattern,
          selectable: false,
          name: 'dotGrid',
          visible: isGridDisplay,
        },
      )

      canvas.add(backgroundPolygon)
      backgroundPolygon.sendToBack()
      canvas.renderAll()
    }

    if (patternData.lineGridDisplay) {
      for (let i = 0; i < canvas.height / patternData.gridVertical + 1; i++) {
        const horizontalLine = new fabric.Line(
          [0, i * patternData.gridVertical - patternData.gridVertical / 2, canvas.width, i * patternData.gridVertical - patternData.gridVertical / 2],
          {
            stroke: gridColor,
            strokeWidth: 1,
            selectable: true,
            lockMovementX: true,
            lockMovementY: true,
            lockRotation: true,
            lockScalingX: true,
            lockScalingY: true,
            name: 'lineGrid',
            strokeDashArray: [5, 2],
            opacity: 0.3,
            padding: GRID_PADDING,
            direction: 'horizontal',
            visible: isGridDisplay,
          },
        )
        canvas.add(horizontalLine)
      }

      for (let i = 0; i < canvas.width / patternData.gridHorizon + 1; i++) {
        const verticalLine = new fabric.Line(
          [i * patternData.gridHorizon - patternData.gridHorizon / 2, 0, i * patternData.gridHorizon - patternData.gridHorizon / 2, canvas.height],
          {
            stroke: gridColor,
            strokeWidth: 1,
            selectable: true,
            lockMovementX: true,
            lockMovementY: true,
            lockRotation: true,
            lockScalingX: true,
            lockScalingY: true,
            name: 'lineGrid',
            strokeDashArray: [5, 2],
            opacity: 0.3,
            padding: GRID_PADDING,
            direction: 'vertical',
            visible: isGridDisplay,
          },
        )
        canvas.add(verticalLine)
      }
    }

    canvas.renderAll()
  }, [dotLineGridSetting])

  const move = (object, x, y) => {
    object.set({
      ...object,
      x1: object.direction === 'vertical' ? object.x1 + x : 0,
      x2: object.direction === 'vertical' ? object.x1 + x : canvas.width,
      y1: object.direction === 'vertical' ? 0 : object.y1 + y,
      y2: object.direction === 'vertical' ? canvas.height : object.y1 + y,
    })
  }

  const copy = (object, length) => {
    const lineStartX = object.direction === 'vertical' ? object.x1 + length : 0
    const lineEndX = object.direction === 'vertical' ? object.x2 + length : canvas.width
    const lineStartY = object.direction === 'vertical' ? 0 : object.y1 + length
    const lineEndY = object.direction === 'vertical' ? canvas.width : object.y1 + length

    const line = new fabric.Line([lineStartX, lineStartY, lineEndX, lineEndY], {
      stroke: gridColor,
      strokeWidth: 1,
      selectable: true,
      lockMovementX: true,
      lockMovementY: true,
      lockRotation: true,
      lockScalingX: true,
      lockScalingY: true,
      strokeDashArray: [5, 2],
      opacity: 0.3,
      padding: GRID_PADDING,
      direction: object.direction,
      visible: isGridDisplay,
      name: object.name,
    })

    canvas.add(line)
    canvas.setActiveObject(line)
    canvas.renderAll()
  }

  return {
    move,
    copy,
  }
}