import { DrawPile } from "./drawpile.ts";
import { CheckData, CheckDataOption, ChoiceOption } from "./newmap.ts";
import { getPartLocation, withCamera } from "./layout.ts";
import { AlignX, AlignY, Point, Rect, Size } from "./engine/datatypes.ts";
import { D } from "./engine/public.ts";
import { addButton } from "./button.ts";
import { getSkills } from "./skills.ts";
import { getPlayerProgress } from "./playerprogress.ts";
import { C } from "./colors.ts";

export class CheckModal {
  #drawpile: DrawPile;
  #activeCheck: CheckData | null;
  #callback: (() => void) | null;
  #success: string | null;

  constructor() {
    this.#drawpile = new DrawPile();
    this.#activeCheck = null;
    this.#callback = null;
    this.#success = null;
  }

  get isShown() {
    return this.#activeCheck != null;
  }

  get #size(): Size {
    return getPartLocation("BottomModal").size;
  }

  update() {
    withCamera("BottomModal", () => this.#update());
    this.#drawpile.executeOnClick();
  }

  draw() {
    withCamera("BottomModal", () => this.#draw());
  }

  show(checkData: CheckData | null, callback: (() => void) | null) {
    this.#activeCheck = checkData;
    this.#callback = callback;
    this.#success = null;
  }

  #update() {
    this.#drawpile.clear();

    let check = this.#activeCheck;
    if (!check) {
      return;
    }

    let size = this.#size;
    this.#drawpile.add(0, () => {
      D.fillRect(new Point(-4, -4), size.add(new Size(8, 8)), C.BG_UI);
    });

    let success = this.#success;
    if (success) {
      this.#drawpile.add(0, () => {
        D.drawText(
          success,
          new Point(size.w / 2, (size.h - 64) / 2),
          C.FG_BOLD,
          {
            forceWidth: size.w,
            alignX: AlignX.Center,
            alignY: AlignY.Middle,
          },
        );
      });
      addButton(
        this.#drawpile,
        "OK!",
        new Rect(new Point(0, size.h - 64), new Size(size.w, 64)),
        true,
        () => {
          this.show(null, null);
        },
      );
      return;
    }

    let labelText = check.label;
    this.#drawpile.add(0, () => {
      D.drawText(
        labelText,
        new Point(size.w / 2, (size.h - 64) / 2),
        C.FG_BOLD,
        {
          forceWidth: size.w,
          alignX: AlignX.Center,
          alignY: AlignY.Middle,
        },
      );
    });

    let options = check.options;

    let addOptionButton = (
      option: CheckDataOption | ChoiceOption,
      rect: Rect,
    ) => {
      let accomplished: boolean;
      let optionLabel: string;
      let resultMessage: string | null;
      let endorse = false;
      if ((option as ChoiceOption).isChoice) {
        // TODO: Use OOP here
        option = option as ChoiceOption;
        accomplished = option.countsAsSuccess;
        optionLabel = option.unlockable;
        resultMessage = option.success;
      } else {
        option = option as CheckDataOption;
        let skill = option.skill();
        let skillName = getSkills().get(skill).profile.name;
        let hasSkill = getPlayerProgress().hasLearned(skill);
        // hasSkill ||= true;
        if (hasSkill) {
          optionLabel = `[${skillName}] ${option.unlockable}`;
          endorse = true;
        } else {
          optionLabel = `[Needs ${skillName}] ${option.locked}`;
        }
        resultMessage = hasSkill ? option.success : option.failure;
        accomplished = hasSkill;
      }
      addButton(
        this.#drawpile,
        optionLabel,
        rect,
        true,
        () => {
          this.#success = resultMessage;

          if (accomplished) {
            let cb = this.#callback;
            if (cb) {
              cb();
            }
          }

          if (resultMessage == null) {
            this.show(null, null);
          }
        },
        { endorse },
      );
    };

    if (options.length == 0) {
      addButton(
        this.#drawpile,
        "OK!",
        new Rect(new Point(0, size.h - 64), new Size(size.w, 64)),
        true,
        () => {
          this.show(null, null);
        },
      );
    } else if (options.length == 1) {
      addOptionButton(
        options[0],
        new Rect(new Point(0, size.h - 64), new Size(size.w, 64)),
      );
    } else if (options.length == 2) {
      addOptionButton(
        options[0],
        new Rect(new Point(0, size.h - 64), new Size(size.w, 32)),
      );
      addOptionButton(
        options[1],
        new Rect(new Point(0, size.h - 32), new Size(size.w, 32)),
      );
    } else {
      throw new Error(`unexpected number of options ${options.length}`);
    }
  }

  #draw() {
    this.#drawpile.draw();
  }
}

let active: CheckModal = new CheckModal();
export function getCheckModal() {
  return active;
}