import { Battle } from "../../core/Battle";
import { BaseView } from "../BaseView";
import { MultiBattle } from "../battle/MultiBattle";
import { UIButton } from "../common/UIButton";
import { UIDialog } from "../common/UIDialog";

function hasMulti<T extends BaseView>(view: T): view is T & { multi: MultiBattle, actual_battle: Battle } {
  return ((view as any).multi instanceof MultiBattle) && ((view as any).actual_battle instanceof Battle);
}

/**
 * Dialog to display game options
 */
export class OptionsDialog extends UIDialog {
  constructor(parent: BaseView, credits = false) {
    super(parent);

    if (credits) {
      this.pageCredits();
    } else {
      this.pageMenu();
    }

    this.addCloseButton();
  }

  pageCommon() {
    let options = this.view.options;

    this.content.clear();

    this.content.image("options-logo", 473, 71);
    this.content.image("options-buttons-background", 244, 357);

    this.addToggleButton(415, 381, "options-option-sound", "Toggle all sound",
      toggled => options.setNumberValue("mainvolume", toggled ? 1 : 0),
      options.getNumberValue("mainvolume") > 0
    );

    this.addToggleButton(this.width / 2, 381, "options-option-music", "Toggle music",
      toggled => options.setNumberValue("musicvolume", toggled ? 1 : 0),
      options.getNumberValue("musicvolume") > 0
    );

    this.addToggleButton(this.width - 415, 381, "options-option-fullscreen", "Toggle fullscreen",
      toggled => options.setBooleanValue("fullscreen", toggled),
      options.getBooleanValue("fullscreen")
    );
  }

  /**
   * Add a toggle button
   */
  addToggleButton(x: number, y: number, key: string, tooltip: string, callback: (state: boolean) => boolean, initial: boolean): UIButton {
    let button = this.content.button("options-toggle", x, y, undefined, tooltip, state => {
      if (callback(state)) {
        return state;
      } else {
        return !state;
      }
    }, { center: true });
    this.content.in(button).image(key, 0, 0, true);
    button.toggle(initial);
    return button;
  }

  /**
   * Show the options menu
   */
  pageMenu() {
    this.pageCommon();

    if (this.view.session.primary) {
      this.content.button("options-button", this.width / 2, 600, () => this.pageInvite(), "Invite a friend to join this game as spectator", undefined, {
        center: true,
        text: "Invite a friend",
        text_style: {
          color: "#9fc4d6",
          size: 36,
        }
      });
    }

    this.content.button("options-button", this.width / 2, 800, () => this.view.gameui.quitGame(), "End the current game and go back to main menu", undefined, {
      center: true,
      text: "Quit to menu",
      text_style: {
        color: "#9fc4d6",
        size: 36,
      }
    });
  }

  /**
   * Show the credits info
   */
  pageCredits() {
    this.pageCommon();

    this.content.text("Credits", this.width / 2, 566, { center: true, size: 48, color: "#dbeff9", shadow: true });
    let credits = "Michaël Lemaire - Code and graphics\n\
Viktor Hahn - Ship models\n\
KenneyNL - Sound effects\n\
Matthieu Desprez - Beta testing and ideas\n\
Néstor Delgado - Font\n\
Nicolas Forgo - Ship models\n\
Kevin MacLeod - Musics";
    this.content.text(credits, this.width / 2, 754, { center: true, size: 24, color: "#9fc4d6", shadow: true });
  }

  /**
   * Show the invite page
   */
  async pageInvite() {
    this.pageCommon();

    let conn = this.view.getConnection();
    try {
      let token = await conn.publish(this.view.session, "Multiplayer invitation");
      this.displayMultiplayerToken(token);

      if (hasMulti(this.view)) {
        await this.view.multi.setup(this.view, this.view.actual_battle, token, true);
      } else {
        // TODO
        this.displayConnectionError();
      }

      this.close();
    } catch (err) {
      this.displayConnectionError();
    }
  }

  /**
   * Display a multiplayer token page
   */
  private displayMultiplayerToken(token: string) {
    this.pageCommon();

    this.content.styled({ size: 36 }, content => {
      content.text("Give this invite code to your friend:", this.width / 2, 540, { color: "#dbeff9" });
      content.text(token, this.width / 2, 620, { color: "#9FC4D6" });
      content.text("Waiting for a connection...", this.width / 2, 700, { color: "#BF9757" });
    });

    this.content.button("options-button", this.width / 2, 840, () => this.pageMenu(), "Cancel waiting for the other person to connect", undefined, {
      center: true,
      text: "Cancel",
      text_style: {
        color: "#9fc4d6",
        size: 36,
      }
    });
  }

  /**
   * Display a connection error
   */
  private displayConnectionError() {
    this.pageCommon();

    this.content.text("Could not establish connection to server", this.width / 2, 620, {
      color: "#b35b56",
      size: 36,
      bold: true
    });

    this.content.button("options-button", this.width / 2, 840, () => this.pageMenu(), "Cancel the connection", undefined, {
      center: true,
      text: "Cancel",
      text_style: {
        color: "#9fc4d6",
        size: 36,
      }
    });
  }
}