import { IMAGES, SPRITE_SPECS, SpriteSpec, Sprites } from "../config";
import { Entity, EntityNames } from ".";
import {
  BoundingBox,
  ComponentNames,
  Grid,
  Highlight,
  Interactable,
  LambdaTerm,
  Modal,
  Pushable,
  Sprite,
} from "../components";
import { Coord2D } from "../interfaces";

export class FunctionBox extends Entity {
  private static spriteSpec: SpriteSpec = SPRITE_SPECS.get(
    Sprites.FUNCTION_BOX
  ) as SpriteSpec;

  constructor(
    gridPosition: Coord2D,
    private readonly code: string
  ) {
    super(EntityNames.FunctionBox);

    this.addComponent(
      new BoundingBox(
        {
          x: 0,
          y: 0,
        },
        {
          width: FunctionBox.spriteSpec.width,
          height: FunctionBox.spriteSpec.height,
        },
        0
      )
    );

    this.addComponent(new Pushable());

    this.addComponent(new Grid(gridPosition));

    this.addComponent(
      new Sprite(
        IMAGES.get(FunctionBox.spriteSpec.sheet)!,
        { x: 0, y: 0 },
        {
          width: FunctionBox.spriteSpec.width,
          height: FunctionBox.spriteSpec.height,
        },
        FunctionBox.spriteSpec.msPerFrame,
        FunctionBox.spriteSpec.frames
      )
    );

    this.addComponent(new LambdaTerm(code));

    this.addComponent(
      new Highlight(this.onHighlight.bind(this), this.onUnhighlight.bind(this))
    );
  }

  private interaction() {
    const codeConsumer = (_code: string) => {
      this.removeComponent(ComponentNames.Modal);
      return { consumed: true };
    };
    const { last } = this.getComponent<LambdaTerm>(ComponentNames.LambdaTerm);
    this.addComponent(
      new Modal({
        type: "CODE_EDITOR",
        codeInit: {
          code: this.code,
          codeConsumer,
          readonly: true,
          result: {
            error: last?.error && `Error: ${last.error.message}`,
          },
        },
      })
    );
  }

  public onHighlight() {
    this.addComponent(new Interactable(this.interaction.bind(this)));
  }

  public onUnhighlight() {
    this.removeComponent(ComponentNames.Interactable);
  }
}