import * as Ajv from "ajv";

import Keymaps, { KeymapsJSON } from "./Keymaps";
import Search, { SearchJSON } from "./Search";
import Properties, { PropertiesJSON } from "./Properties";
import Blacklist, { BlacklistJSON } from "./Blacklist";
import validate from "./validate";

export type SettingsJSON = {
  keymaps?: KeymapsJSON;
  search?: SearchJSON;
  properties?: PropertiesJSON;
  blacklist?: BlacklistJSON;
};

export default class Settings {
  public keymaps: Keymaps;

  public search: Search;

  public properties: Properties;

  public blacklist: Blacklist;

  constructor({
    keymaps,
    search,
    properties,
    blacklist,
  }: {
    keymaps: Keymaps;
    search: Search;
    properties: Properties;
    blacklist: Blacklist;
  }) {
    this.keymaps = keymaps;
    this.search = search;
    this.properties = properties;
    this.blacklist = blacklist;
  }

  static fromJSON(json: unknown): Settings {
    const valid = validate(json);
    if (!valid) {
      const message = (validate as any)
        .errors!.map((err: Ajv.ErrorObject) => {
          return `'${err.instancePath}' ${err.message}`;
        })
        .join("; ");
      throw new TypeError(message);
    }

    const obj = json as SettingsJSON;
    const settings = { ...DefaultSetting };
    if (obj.keymaps) {
      settings.keymaps = Keymaps.fromJSON(obj.keymaps);
    }
    if (obj.search) {
      settings.search = Search.fromJSON(obj.search);
    }
    if (obj.properties) {
      settings.properties = Properties.fromJSON(obj.properties);
    }
    if (obj.blacklist) {
      settings.blacklist = Blacklist.fromJSON(obj.blacklist);
    }
    return new Settings(settings);
  }

  toJSON(): SettingsJSON {
    return {
      keymaps: this.keymaps.toJSON(),
      search: this.search.toJSON(),
      properties: this.properties.toJSON(),
      blacklist: this.blacklist.toJSON(),
    };
  }
}

export const DefaultSettingJSONText = `{
  "keymaps": {
    "a": { "type": "scroll.home" },
    "x": { "type": "command.show" },
    "o": { "type": "command.show.open", "alter": false },
    "O": { "type": "command.show.open", "alter": true },
    "t": { "type": "command.show.tabopen", "alter": false },
    "T": { "type": "command.show.tabopen", "alter": true },
    "Z": { "type": "command.show.buffer" },
    "p": { "type": "scroll.vertically", "count": -1 },
    "n": { "type": "scroll.vertically", "count": 1 },
    "b": { "type": "scroll.horizonally", "count": -1 },
    "f": { "type": "scroll.horizonally", "count": 1 },
    "<C-U>": { "type": "scroll.pages", "count": -0.5 },
    "<C-D>": { "type": "scroll.pages", "count": 0.5 },
    "<A-V>": { "type": "scroll.pages", "count": -1 },
    "<C-V>": { "type": "scroll.pages", "count": 1 },
    "<": { "type": "scroll.top" },
    ">": { "type": "scroll.bottom" },
    "e": { "type": "scroll.end" },
    "k": { "type": "tabs.close" },
    "K": { "type": "tabs.close", "select": "left" },
    "/": { "type": "tabs.reopen" },
    "B": { "type": "tabs.prev" },
    "F": { "type": "tabs.next" },
    "A": { "type": "tabs.first" },
    "E": { "type": "tabs.last" },
    "<C-6>": { "type": "tabs.prevsel" },
    "g": { "type": "tabs.reload", "cache": false },
    "G": { "type": "tabs.reload", "cache": true },
    "j": { "type": "follow.start", "newTab": false },
    "J": { "type": "follow.start", "newTab": true, "background": false },
    "m": { "type": "mark.set.prefix" },
    "'": { "type": "mark.jump.prefix" },
    "l": { "type": "navigate.history.prev" },
    "r": { "type": "navigate.history.next" },
    "[[": { "type": "navigate.link.prev" },
    "]]": { "type": "navigate.link.next" },
    "u": { "type": "navigate.parent" },
    "U": { "type": "navigate.root" },
    ".": { "type": "page.source" },
    "R": { "type": "tabs.reader.toggle" },
    "w": { "type": "urls.yank" },
    "y": { "type": "urls.paste", "newTab": false },
    "Y": { "type": "urls.paste", "newTab": true },
    "<C-S>": { "type": "find.start" },
    "s": { "type": "find.next" },
    "S": { "type": "find.prev" },
    "z": { "type": "repeat.last" },
    "<S-Esc>": { "type": "addon.toggle.enabled" }
  },
  "search": {
    "default": "d",
    "engines": {
      "a": "https://wiki.archlinux.org/index.php?search={}",
      "aa": "https://aur.archlinux.org/packages?K={}",
      "ap": "https://archlinux.org/packages/?q={}",
      "d": "https://html.duckduckgo.com/html?q={}",
      "db": "https://packages.debian.org/search?keywords={}",
      "f": "https://search.f-droid.org/?q={}",
      "fs": "https://directory.fsf.org/w/index.php?search={}",
      "g": "https://github.com/search?q={}",
      "hoog": "https://hoogle.haskell.org/?hoogle={}",
      "i": "https://imdb.com/find?q={}",
      "o": "https://openlibrary.org/search?q={}",
      "p": "https://ptv.libreau.org/?q={}",
      "r": "https://reddit.com/r/all/search?q={}",
      "t": "https://twitter.com/search?q={}",
      "w": "https://en.wikipedia.org/w/index.php?search={}",
      "wt": "https://wiktionary.org/w/index.php?search={}",
      "wy": "https://wikivoyage.org/w/index.php?search={}",
      "wz": "https://zh.wikipedia.org/w/index.php?search={}",
      "y": "https://youtube.com/search?q={}"
    }
  },
  "properties": {
    "hintchars": "abcdefghijklmnopqrstuvwxyz",
    "smoothscroll": false,
    "complete": "sbh",
    "colorscheme": "system"
  },
  "blacklist": [
  ]
}`;

export const DefaultSetting: Settings = Settings.fromJSON(
  JSON.parse(DefaultSettingJSONText)
);