import type { WebContents } from 'electron';

export const hostname = 'nhentai.net';
export const url = `https://${hostname}/`;

export const paths = {
  books: 'g/',
  login: 'login/',
  favorites: 'favorites/',
};

export const downloadLinkId = 'download';

export const nextFavoritePageSelector = 'a.next';
export const coverLinkSelector = 'a.cover';
export const preTitleSelector = 'h1.title .before';
export const mainTitleSelector = 'h1.title .pretty';
export const postTitleSelector = 'h1.title .after';
export const labeledTagContainerSelector = '.tag-container.field-name';
export const tagSelector = '.tag';
export const tagNameSelector = 'span.name';
export const timeSelector = 'time';

export const tagLabelParodies = 'Parodies';
export const tagLabelCharacters = 'Characters';
export const tagLabelTags = 'Tags';
export const tagLabelArtists = 'Artists';
export const tagLabelGroups = 'Groups';
export const tagLabelLanguages = 'Languages';

export const languageToLangCode = {
  japanese: LangCode.JAPANESE,
  english: LangCode.ENGLISH,
  chinese: LangCode.CHINESE,
};
export type NhentaiRealLanguage = keyof typeof languageToLangCode;
export type NhentaiLanguage = NhentaiRealLanguage | 'translated';

export function isNhentaiLanguage(language: string): language is NhentaiLanguage {
  return isNhentaiRealLanguage(language) || language === 'translated';
}

export function isNhentaiRealLanguage(language: string): language is NhentaiRealLanguage {
  return Object.keys(languageToLangCode).includes(language);
}

export function pageIsReady(webContents: WebContents): Promise<boolean> {
  return webContents.executeJavaScript(`!!document.getElementById('content')`) as Promise<boolean>;
}

export function galleryPageIsReady(webContents: WebContents): Promise<boolean> {
  return webContents.executeJavaScript(`!!document.getElementById('${downloadLinkId}')`) as Promise<boolean>;
}

export function favoritePageIsReady(webContents: WebContents): Promise<boolean> {
  return webContents.executeJavaScript(`!!document.getElementById('favorites-random-button')`) as Promise<boolean>;
}

export function loginPageIsReady(webContents: WebContents): Promise<boolean> {
  return webContents.executeJavaScript(`!!document.getElementById('id_username_or_email')`) as Promise<boolean>;
}

export function getFavoritePageUrl(page?: number): string {
  return `${url + paths.favorites}${page ? `?page=${page}` : ''}`;
}

export function getBookUrl(galleryId: string): string {
  return `${url}g/${galleryId}/`;
}

export function getGalleryId(bookUrl: string): string {
  const regExpExecArray = /https:\/\/nhentai\.net\/g\/(\d+)/.exec(bookUrl);
  if (regExpExecArray && regExpExecArray[1]) {
    return regExpExecArray[1];
  } else {
    throw new TypeError(`could not get nhentai gallery if from the book url ${bookUrl}`);
  }
}