import { Maybe, userNameBinding } from "./interfaces"

export default class RegistrationHandler {
	private userRegister: userNameBinding[] = []
	private static _instance: RegistrationHandler
	public constructor() {
		console.log('Setup RegistrationHandler')
	}
	public static get Instance() {
		return this._instance || (this._instance = new this())
	}

	public register(discordname: string, steamname: string): boolean {
		const binding: userNameBinding = {
			Steam: steamname,
			Discord: discordname
		}
		console.log(`Trying to register ${JSON.stringify(binding)}`)

		let alreadyPresentBinding = this.userRegister.find(x => x.Discord == binding.Discord)
		if (alreadyPresentBinding) {
			console.log(`Binding already present: ${alreadyPresentBinding}, overwriting.`)
			alreadyPresentBinding = binding
		}
		else {
			this.userRegister.push(binding)
			console.log(`Binding successfully added.`)
		}
		return true
	}
	public getAllMappings(): userNameBinding[] { return this.userRegister }
	public removeUser(discordName: string): void { this.userRegister = this.userRegister.filter(x => x.Discord !== discordName) }
	public getNameRegisteredForDiscordUser(discordUser: string): Maybe<userNameBinding> { return this.userRegister.find(x => x.Discord == discordUser) }
	public getNameRegisteredForSteamUser(steamUser: string): Maybe<userNameBinding> { return this.userRegister.find(x => x.Steam == steamUser) }
	public listRegisteredMembers(): string { return JSON.stringify(this.userRegister) }
	private printHelpText(): string { return "" }
	private buildHelpText(): string { return "" }
}