import { Redis } from "../db.ts";
import Dictionary from "./usernames.ts";
import { Config } from "../config.ts";
import { AuthType } from "./users.ts";
import * as JsonWebToken from "@gz/jwt";

const config = Config.getConfig();

interface ProfileInitOptions {
    username: string
}
interface AccountExport {
    accountId: number,
    profileImage: string,
    isJunior: boolean,
    platforms: number,
    username: string,
    displayName: string
}
export type ProfileTokenFormat = {
    iss: string;
    sub: number;
    nbf: number;
    iat: number;
    exp: number;
    typ: AuthType;
}

class Profile {

    static async getUniqueId() {
        let id = Math.round(Math.random() * Math.pow(2, 31));
        while ((await Redis.Database.exists(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.Username))) >= 1)
            id = await this.getUniqueId();
        return id;
    }

    static async byName(name: string) {
        const id = await Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profile_Usernames, name));
        if (id == null) return null;
        else return new Profile(parseInt(id, 10));
    }

    static async getUniqueUsername() {
        let username = `${Dictionary.Adjectives[Math.floor(Math.random() * Dictionary.Adjectives.length)]}${Dictionary.Nouns[Math.floor(Math.random() * Dictionary.Nouns.length)]}${Math.round(Math.random() * 10000)}`
        while ((await Profile.byName(username)) !== null) username = await this.getUniqueUsername();
        return username;
    }

    static async init(options?: ProfileInitOptions) {

        const optionsSpecified = typeof options !== 'undefined';
        
        const newId = await this.getUniqueId();
        const newUsername = optionsSpecified ? options.username : await this.getUniqueUsername();

        await Redis.Database.set(Redis.buildKey(Redis.KeyGroups.Profile_Usernames, newUsername), newId);
        await Redis.Database.set(Redis.buildKey(Redis.KeyGroups.Profiles.Root, newId.toString(), Redis.KeyGroups.Profiles.Username), newUsername);

        return new Profile(newId);

    }

    // surely this can be written better
    static getExportAccount(id: number): Promise<AccountExport | null> {
        return new Promise((resolve, _reject) => {
            Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.Username)).then(val => {
                if (val == null) resolve(null);
                else {
                    const promises = {
                        profileImage: Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.ProfileImage)),
                        isJunior: Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.Junior)),
                        platforms: Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.Platforms)),
                        displayName: Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.DisplayName)),
                        username: Redis.Database.get(Redis.buildKey(Redis.KeyGroups.Profiles.Root, id.toString(), Redis.KeyGroups.Profiles.Username)),
                    }
    
                    Promise.all(Object.values(promises)).then((values) => {
                        resolve({
                            accountId: id,
                            profileImage: values[0] == null ? "DefaultProfileImage" : values[0],
                            isJunior: values[1] == null ? false : JSON.parse(values[1]),
                            platforms: values[2] == null ? 1 : JSON.parse(values[2]),
                            displayName: values[3] == null ? (values[4] == null ? "DATABASEERROR" : values[4]) : values[3],
                            username: values[4] == null ? "DATABASEERROR" : values[4],
                        });
                    });
                }
            });
        });
    }

    static async getExportAccountsBulk(ids: number[]) {

        const accs = await Promise.all(ids.map(val => this.getExportAccount(val)));
        return accs.filter(val => val !== null);

    }

    #id: number;

    constructor(id: number) {
        this.#id = id;
    }

    getId() { 
        return this.#id;
    }

    async export() {
        return await Profile.getExportAccount(this.#id);
    }

    async getToken() {
        const payload: ProfileTokenFormat = {
            iss: config.web.publichost,
            sub: this.#id,
            nbf: Math.round(Date.now() / 1000) - 200,
            iat: Math.round(Date.now() / 1000),
            exp: Math.round(Date.now() / 1000) + (config.auth.timeout * 60 * 60),
            typ: AuthType.Web
        };
        return await JsonWebToken.encode(payload, config.auth.secret, { algorithm: "HS512" });
    }

}

export default Profile;