import { Layout, Txt, makeScene2D } from "@motion-canvas/2d";
import {
  Direction,
  beginSlide,
  createRef,
  slideTransition,
} from "@motion-canvas/core";
import { theme } from "../theme";

const boolE = [
  "true = λ t . λ f . t",
  "false = λ t . λ f . f",
  "if = λ b . λ x . λ y . b x y",
  "not = λ b . b false true",
  "and = λ b . λ c . b c false",
];

export default makeScene2D(function* (view) {
  const numerals = createRef<Txt>();

  view.add(
    <Layout layout direction="column" alignItems="center">
      <Txt fontSize={40} fontFamily={theme.font} fill={theme.text.hex}>
        Boolean Encoding
      </Txt>
      <Txt
        ref={numerals}
        fontSize={30}
        fontFamily={theme.font}
        fill={theme.text.hex}
      ></Txt>
    </Layout>
  );

  yield* slideTransition(Direction.Right);
  yield* beginSlide("The Lambda Calculus - Boolean Encoding");

  for (const bool of boolE) {
    yield* numerals().text(numerals().text() + "\n\n" + bool, 1);
    yield* beginSlide("boolean - " + bool);
  }
});