import {
  FrameNode,
  NodeController,
  RenderNode,
  DrawContext,
  BuilderNode,
  RenderOptions,
  Position
} from '@ohos.arkui.node';
import { UIContext } from '@ohos.arkui.UIContext';
import { Size } from '@ohos/hypium/src/main/Constant';

class CommonStyleModifier implements AttributeModifier<CommonAttribute> {
  _size: SizeOptions = { width: 0, height: 0 };
  _backgroundColor: ResourceColor = Color.Transparent;

  applyNormalAttribute(instance: CommonAttribute): void {
    instance.size(this._size);
    instance.backgroundColor(this._backgroundColor);
  }

  size(size: SizeOptions): CommonStyleModifier {
    this._size = size
    return this
  }

  backgroundColor(color: ResourceColor): CommonStyleModifier {
    this._backgroundColor = color
    return this
  }
}

class ImageStyleModifier implements AttributeModifier<ImageAttribute> {
  _imageFit: ImageFit = ImageFit.None;

  applyNormalAttribute(instance: ImageAttribute): void {
    instance.objectFit(this._imageFit);
  }

  imageFit(imageFit: ImageFit): ImageStyleModifier {
    this._imageFit = imageFit
    return this
  }
}

class BuilderParams {
}

class DivBuilderParams extends BuilderParams {
  commonModifier: CommonStyleModifier;

  constructor(commonModifier: CommonStyleModifier) {
    super()
    this.commonModifier = commonModifier;
  }
}

class ImageBuilderParams extends BuilderParams {
  commonModifier: CommonStyleModifier;
  imageModifier: ImageStyleModifier;
  src: string;

  constructor(commonModifier: CommonStyleModifier, imageModifier: ImageStyleModifier, src: string) {
    super()
    this.commonModifier = commonModifier;
    this.imageModifier = imageModifier;
    this.src = src;
  }
}

@Builder
function divBuilder(param: Object) {
  Stack() {
  }.attributeModifier((param as DivBuilderParams).commonModifier);

  // Stack() {
  // }
  // .width((param as DivBuilderParams).commonModifier._size.width)
  // .height((param as DivBuilderParams).commonModifier._size.height)
  // .backgroundColor((param as DivBuilderParams).commonModifier._backgroundColor);
}

@Builder
function imageBuilder(param: Object) {

  // Image($r((param as ImageBuilderParams).src))
  //   .attributeModifier((param as ImageBuilderParams).commonModifier)
  //   .attributeModifier((param as ImageBuilderParams).imageModifier);

  Image($r((param as ImageBuilderParams).src))
    .width((param as ImageBuilderParams).commonModifier._size.width)
    .height((param as ImageBuilderParams).commonModifier._size.height)
    .backgroundColor((param as ImageBuilderParams).commonModifier._backgroundColor)
    .objectFit((param as ImageBuilderParams).imageModifier._imageFit);
}

class CKRenderNode {
  protected _renderNode: RenderNode | null = null;
  protected _id: number = 0;
  protected _tag: string = '';
  protected _pos: Position = { x: 0, y: 0 };
  protected _size: Size = { width: 0, height: 0 };

  constructor(renderNode: RenderNode | null, pos: Position, size: Size,) {
    this._renderNode = renderNode;
    this._pos = pos;
    this._size = size;
    if (renderNode) {
      renderNode.position = pos;
      renderNode.size = size;
    }
  }

  getRenderNode(): RenderNode | null {
    return this._renderNode;
  }
}

@Builder
function DivBuilder(param: Object) {
  // TODO: @zhaojie.szj 会 crash, 已反馈给华为侧
  // Stack() {
  // }.attributeModifier((param as CKBuilderNode).getCommonStyleModifier());

  Stack() {
  }
  // size 100% 100% ? 如果用 100% 调用 update 大小会不对 ？？
  .size((param as CKBuilderNode).getCommonStyleModifier()._size)
  .backgroundColor((param as CKBuilderNode).getCommonStyleModifier()._backgroundColor);
}

@Builder
function ImageBuilder(param: Object) {
  // TODO: @zhaojie.szj 会 crash, 已反馈给华为侧
  // Image((param as CKImageBuilderNode).src)
  // .size({ width: "100%", height: "100%" })
  // .attributeModifier((param as CKImageBuilderNode).getImageStyleModifier())
  // .attributeModifier((param as CKImageBuilderNode).getCommonStyleModifier());

  Image($r((param as CKImageBuilderNode).src))
    // size 100% 100% ? 如果用 100% 调用 update 大小会不对 ？？
    .size((param as CKBuilderNode).getCommonStyleModifier()._size)
    .backgroundColor((param as CKImageBuilderNode).getCommonStyleModifier()._backgroundColor)
    .objectFit((param as CKImageBuilderNode).getImageStyleModifier()._imageFit);
}

class CKBuilderNode extends CKRenderNode {
  private _builderNode: BuilderNode<CKBuilderNode[]>;
  private _commonModifier: CommonStyleModifier = new CommonStyleModifier();
  private _styles: Record<string, Object> = {};
  private _attrs: Record<string, Object> = {};
  private _events: Record<string, Object> = {};

  constructor(builderNode: BuilderNode<CKBuilderNode[]>, pos: Position, size: Size, styles: Record<string, Object>) {
    super(builderNode?.getFrameNode()?.getRenderNode() ?? null, pos, size);
    this._builderNode = builderNode;
    this._styles = styles;
  }

  build(builder: WrappedBuilder<CKBuilderNode[]>) {
    this._builderNode.build(builder, this);
    this._renderNode = this._builderNode.getFrameNode()?.getRenderNode() ?? null;
    this._renderNode!.position = this._pos;
    this._renderNode!.size = this._size;
  }

  static makeDivNode(uiContext: UIContext, pos: Position, size: Size,
                     styles: Record<string, Object>): CKBuilderNode {
    // // 不指定 selfIdealSize RenderNode 为空??
    // let options: RenderOptions = {
    //   selfIdealSize: size
    // }
    let builderNode = new BuilderNode(uiContext);
    let divNode = new CKBuilderNode(builderNode, pos, size, styles);
    divNode.build(new WrappedBuilder(DivBuilder));
    // 要 build 后才能获取到 RenderNode
    // builderNode.build(new WrappedBuilder(DivBuilder), divNode);
    return divNode;
  }

  getCommonStyleModifier(): CommonStyleModifier {
    return new CommonStyleModifier().size(this._size)
      .backgroundColor(this._styles.backgroundColor as ResourceColor);
  }

  add(node: CKBuilderNode) {
    this.getRenderNode()!.appendChild(node.getRenderNode()!);
  }

  updateStyle(styles: Record<string, Object>) {
    this._styles = styles;
    this._builderNode.update(this);
  }
}


class CKImageBuilderNode extends CKBuilderNode {
  private _imageModifier: ImageStyleModifier = new ImageStyleModifier();
  private _src: string = '';

  constructor(builderNode: BuilderNode<CKImageBuilderNode[]>, pos: Position, size: Size,
              styles: Record<string, Object>, imageModifier: ImageStyleModifier, src: string) {
    super(builderNode, pos, size, styles);
    this._imageModifier = imageModifier;
    this._src = src;
  }

  static makeImageNode(uiContext: UIContext, pos: Position, size: Size,
                       styles: Record<string, Object>, imageModifier: ImageStyleModifier, src: string): CKBuilderNode {
    let builderNode = new BuilderNode(uiContext);
    let imageNode = new CKImageBuilderNode(builderNode, pos, size, styles, imageModifier, src);
    imageNode.build(new WrappedBuilder(ImageBuilder));
    return imageNode;
  }

  getImageStyleModifier(): ImageStyleModifier {
    return new ImageStyleModifier().imageFit(this._imageModifier._imageFit);
  }

  get src(): string {
    return this._src;
  }
}

class MyNodeController extends NodeController {
  private _width: number = 0;
  private _height: number = 0;
  private _rootNode: FrameNode | null = null;
  private _uiContext: UIContext | null = null;

  constructor(width: number, height: number) {
    super();
    this._width = width;
    this._height = height;
  }

  makeNode(uiContext: UIContext): FrameNode {
    this._uiContext = uiContext;
    this._rootNode = new FrameNode(uiContext);
    const renderNode = this._rootNode.getRenderNode();
    if (renderNode) {
      renderNode.backgroundColor = Color.White;
      renderNode.clipToFrame = true;
      renderNode.frame = { x: 0, y: 0, width: this._width, height: this._height };
    }
    return this._rootNode;
  }

  appendChild(child: RenderNode): void {
    const renderNode = this._rootNode?.getRenderNode();
    if (renderNode) {
      renderNode.appendChild(child);
    }
  }

  get rootNode(): FrameNode | null {
    return this._rootNode;
  }

  get uiContext(): UIContext | null {
    return this._uiContext;
  }
}

@Entry
@Component
struct XNodePage {
  @State message: string = 'Hello World';
  @State commonModifier: CommonStyleModifier = new CommonStyleModifier()
    .size({ width: "80%", height: 300 })
    .backgroundColor(Color.Red);
  @State commonModifier1: CommonStyleModifier = new CommonStyleModifier()
    .size({ width: "80%", height: 300 })
    .backgroundColor(Color.Yellow);
  @State imageModifier: ImageStyleModifier = new ImageStyleModifier()
    .imageFit(ImageFit.Auto);
  nodeController: MyNodeController = new MyNodeController(300, 300);
  containerNode: BuilderNode<BuilderParams[]> | null = null;

  createBuilderNode(uiContext: UIContext, w: number, h: number,
                    builder: WrappedBuilder<BuilderParams[]>,
                    arg: BuilderParams): BuilderNode<BuilderParams[]> {
    let options: RenderOptions = {
      selfIdealSize: { width: w, height: h }
    }
    let builderNode = new BuilderNode(uiContext, options);
    builderNode.build(builder, arg);
    return builderNode;
  }

  build() {
    Column() {
      NodeContainer(this.nodeController)
        .width('100%')
        .height('50%')
        .backgroundColor(Color.Black)
      Blank()
        .height(50)
      Row() {
        Button('Init').onClick(() => {
          let uiContext = this.nodeController.uiContext;
          if (!uiContext) {
            return;
          }

          // let divNode = CKBuilderNode.makeDivNode(uiContext, { x: 0, y: 0 }, { width: 100, height: 100 },
          //   { "backgroundColor": Color.Red });
          // this.nodeController.appendChild(divNode.getRenderNode()!);
          //
          // let imgNode = CKImageBuilderNode.makeImageNode(uiContext, { x: 0, y: 0 }, { width: 50, height: 50 },
          //   { "backgroundColor": Color.Blue }, new ImageStyleModifier().imageFit(ImageFit.Auto), 'app.media.icon');
          // divNode.add(imgNode);
          //
          // setTimeout(() => {
          //   divNode.updateStyle({ "backgroundColor": Color.Green });
          // }, 5000);

          this.containerNode = this.createBuilderNode(uiContext, 100, 100, new WrappedBuilder(divBuilder), new DivBuilderParams(
            new CommonStyleModifier()
              .size({
                width: 100,
                height: 100
              })
              .backgroundColor(Color.Red)));
          this.containerNode.getFrameNode()!.getRenderNode()!.position = { x: 0, y: 0 };
          this.containerNode.getFrameNode()!.getRenderNode()!.clipToFrame = true;
          this.nodeController.appendChild(this.containerNode.getFrameNode()!.getRenderNode()!);

          let img = this.createBuilderNode(uiContext, 50, 50, new WrappedBuilder(imageBuilder), new ImageBuilderParams(
            new CommonStyleModifier()
              .size({
                width: 50,
                height: 50
              })
              .backgroundColor(Color.Blue),
            new ImageStyleModifier()
              .imageFit(ImageFit.Auto),
            'app.media.icon'));
          img.getFrameNode()!.getRenderNode()!.position = { x: 0, y: 0 };
          this.containerNode.getFrameNode()!.getRenderNode()!.appendChild(img.getFrameNode()!.getRenderNode()!);
          // this.nodeController.appendChild(img.getFrameNode()!.getRenderNode()!);

        })

        Button('Add').onClick(() => {
          let div = this.createBuilderNode(this.nodeController.uiContext!, 200, 30, new WrappedBuilder(divBuilder), new DivBuilderParams(
            new CommonStyleModifier()
              .size({
                width: 200,
                height: 30
              })
              .backgroundColor(Color.Yellow)));
          div.getFrameNode()!.getRenderNode()!.position = { x: 0, y: 0 };
          this.containerNode!.getFrameNode()!.getRenderNode()!.insertChildAfter(div.getFrameNode()!.getRenderNode()!, null);
          // div.getFrameNode()!.getRenderNode()!.invalidate();
        })

        Button('Remove').onClick(() => {
          this.containerNode!.getFrameNode()!.getRenderNode()!.removeChild(this.containerNode!.getFrameNode()!.getRenderNode()!.getFirstChild()!);
        })

        Button('Update').onClick(() => {
          this.containerNode!.update(new DivBuilderParams(
            new CommonStyleModifier()
              .size({
                width: 150,
                height: 100
              })
              .backgroundColor(Color.Green)));
          this.containerNode!.getFrameNode()!.getRenderNode()!.position = { x: 100, y: 100 };
          this.containerNode!.getFrameNode()!.getRenderNode()!.clipToFrame = false;
        })
      }
      .width('100%')
      .justifyContent(FlexAlign.SpaceBetween)
    }
  }

  // build() {
  //   Row() {
  //     Column() {
  //       Image($r('app.media.icon'))
  //         .attributeModifier(this.imageModifier)
  //         .attributeModifier(this.commonModifier)
  //         .onClick(() => {
  //           this.commonModifier.backgroundColor(Color.Yellow)
  //         })
  //
  //       Stack() {
  //       }.attributeModifier(this.commonModifier1)
  //     }
  //     .width('100%')
  //   }
  //   .height('100%')
  // }
}