import * as React from 'react'
import { ColorStyle, DashStyle, SizeStyle, TLDrawShapeType, TLDrawState } from '@tldraw/tldraw'
import { TLDraw, TLDrawDocument, TLDrawPatch } from '@tldraw/tldraw'
import { usePersistence } from '../hooks/usePersistence'

const initialDoc: TLDrawDocument = {
  id: 'doc',
  pages: {
    page1: {
      id: 'page1',
      shapes: {
        rect1: {
          id: 'rect1',
          parentId: 'page1',
          name: 'Rectangle',
          childIndex: 1,
          type: TLDrawShapeType.Rectangle,
          point: [32, 32],
          size: [100, 100],
          style: {
            dash: DashStyle.Draw,
            size: SizeStyle.Medium,
            color: ColorStyle.Blue,
          },
        },
        ellipse1: {
          id: 'ellipse1',
          parentId: 'page1',
          name: 'Ellipse',
          childIndex: 2,
          type: TLDrawShapeType.Ellipse,
          point: [132, 132],
          radius: [50, 50],
          style: {
            dash: DashStyle.Draw,
            size: SizeStyle.Medium,
            color: ColorStyle.Cyan,
          },
        },
        draw1: {
          id: 'draw1',
          parentId: 'page1',
          name: 'Draw',
          childIndex: 3,
          type: TLDrawShapeType.Draw,
          point: [232, 232],
          points: [
            [50, 0],
            [100, 100],
            [0, 100],
            [50, 0],
            [100, 100],
            [0, 100],
            [50, 0],
            [56, 5],
          ],
          style: {
            dash: DashStyle.Draw,
            size: SizeStyle.Medium,
            color: ColorStyle.Green,
          },
        },
      },
      bindings: {},
    },
  },
  pageStates: {
    page1: {
      id: 'page1',
      selectedIds: [],
      currentParentId: 'page1',
      camera: {
        point: [0, 0],
        zoom: 1,
      },
    },
  },
}

export default function Editor(): JSX.Element {
  const { value, setValue, status } = usePersistence('doc', initialDoc)

  const handleChange = React.useCallback(
    (tlstate: TLDrawState, patch: TLDrawPatch, reason: string) => {
      if (reason.startsWith('session')) {
        return
      }

      setValue(tlstate.document)
    },
    [setValue]
  )

  if (status === 'loading' || value === null) {
    return <div />
  }

  return <TLDraw document={value} onChange={handleChange} />
}