import { action, computed, makeAutoObservable, ObservableMap } from "mobx";

import { mapToRecord } from "../../lib/conversion";

import {
    LegacyAppearanceOptions,
    legacyMigrateAppearance,
    legacyMigrateTheme,
    LegacyTheme,
    LegacyThemeOptions,
} from "../legacy/redux";

import { Fonts, MonospaceFonts, Overrides } from "../../context/Theme";

import { EmojiPack } from "../../components/common/Emoji";

import { MIGRATIONS } from "../State";
import Persistent from "../interfaces/Persistent";
import Store from "../interfaces/Store";
import Syncable from "../interfaces/Syncable";
import SAudio, { SoundOptions } from "./helpers/SAudio";
import SSecurity from "./helpers/SSecurity";
import STheme from "./helpers/STheme";

export interface ISettings {
    "notifications:desktop": boolean;
    "notifications:sounds": SoundOptions;

    "appearance:emoji": EmojiPack;
    "appearance:ligatures": boolean;
    "appearance:seasonal": boolean;

    "appearance:theme:base": "dark" | "light";
    "appearance:theme:overrides": Partial<Overrides>;
    "appearance:theme:light": boolean;
    "appearance:theme:font": Fonts;
    "appearance:theme:monoFont": MonospaceFonts;
    "appearance:theme:css": string;

    "security:trustedOrigins": string[];
}

/**
 * Manages user settings.
 */
export default class Settings
    implements Store, Persistent<ISettings>, Syncable
{
    private data: ObservableMap<string, unknown>;

    theme: STheme;
    sounds: SAudio;
    security: SSecurity;

    /**
     * Construct new Settings store.
     */
    constructor() {
        this.data = new ObservableMap();
        makeAutoObservable(this);

        this.theme = new STheme(this);
        this.sounds = new SAudio(this);
        this.security = new SSecurity(this);
    }

    get id() {
        return "settings";
    }

    toJSON() {
        return JSON.parse(JSON.stringify(mapToRecord(this.data)));
    }

    @action hydrate(data: ISettings) {
        Object.keys(data).forEach(
            (key) =>
                typeof (data as any)[key] !== "undefined" &&
                this.data.set(key, (data as any)[key]),
        );
    }

    /**
     * Set a settings key.
     * @param key Colon-divided key
     * @param value Value
     */
    @action set<T extends keyof ISettings>(key: T, value: ISettings[T]) {
        this.data.set(key, value);
    }

    /**
     * Get a settings key.
     * @param key Colon-divided key
     * @param defaultValue Default value if not present
     * @returns Value at key
     */
    @computed get<T extends keyof ISettings>(
        key: T,
        defaultValue?: ISettings[T],
    ) {
        return (this.data.get(key) as ISettings[T] | undefined) ?? defaultValue;
    }

    @action remove<T extends keyof ISettings>(key: T) {
        this.data.delete(key);
    }

    /**
     * Set a value in settings without type-checking.
     * @param key Colon-divided key
     * @param value Value
     */
    @action setUnchecked(key: string, value: unknown) {
        this.data.set(key, value);
    }

    /**
     * Get a settings key with unknown type.
     * @param key Colon-divided key
     * @returns Value at key
     */
    @computed getUnchecked(key: string) {
        return this.data.get(key);
    }

    @action apply(
        key: "appearance" | "theme",
        data: unknown,
        revision: number,
    ) {
        if (revision < MIGRATIONS.REDUX) {
            if (key === "appearance") {
                data = legacyMigrateAppearance(data as LegacyAppearanceOptions);
            } else {
                data = legacyMigrateTheme(data as LegacyThemeOptions);
            }
        }

        if (key === "appearance") {
            this.remove("appearance:emoji");
            this.remove("appearance:seasonal");
        } else {
            this.remove("appearance:ligatures");
            this.remove("appearance:theme:base");
            this.remove("appearance:theme:css");
            this.remove("appearance:theme:font");
            this.remove("appearance:theme:light");
            this.remove("appearance:theme:monoFont");
            this.remove("appearance:theme:overrides");
        }

        this.hydrate(data as ISettings);
    }

    @computed private pullKeys(keys: (keyof ISettings)[]) {
        const obj: Partial<ISettings> = {};
        keys.forEach((key) => {
            let value = this.get(key);
            if (!value) return;
            (obj as any)[key] = value;
        });

        return obj;
    }

    @computed toSyncable() {
        const data: Record<"appearance" | "theme", Partial<ISettings>> = {
            appearance: this.pullKeys([
                "appearance:emoji",
                "appearance:seasonal",
            ]),
            theme: this.pullKeys([
                "appearance:ligatures",
                "appearance:theme:base",
                "appearance:theme:css",
                "appearance:theme:font",
                "appearance:theme:light",
                "appearance:theme:monoFont",
                "appearance:theme:overrides",
            ]),
        };

        return data;
    }
}