import { Collection } from "https://deno.land/x/mongo@v0.31.2/mod.ts";
import HttpError from "../server/HttpError.ts";
import User from "../models/User.ts";
import { rest } from "../server/Router.ts";
import { body, schema } from "../server/decorators.ts";
import AppRouter from "./AppRouter.ts";
import * as bcrypt from "https://deno.land/x/bcrypt@v0.4.1/mod.ts";

interface SignupRequest {
    username: string;
    password: string;
}

export default class UserRouter extends AppRouter {
    @rest('GET', '/')
    async get(@schema('string') username: string) {
        const res = await this.users.findOne({ username });

        if (res === undefined) throw new HttpError('User not found.');

        return { username: res.username };
    }
    @rest('POST', '/signup')
    async signup(
        @schema({
            username: 'string', password: 'string',
        }) @body() body: SignupRequest
    ) {
        if (await this.users.countDocuments({ username: body.username }) > 0) {
            throw new HttpError('User with the same username already exists.');
        }

        const password = await bcrypt.hash(body.password, this.salt);

        await this.users.insertOne({
            username: body.username,
            password: password,
        });

        return {};
    }

    public constructor(private salt: string, private users: Collection<User>) {
        super();
        users.createIndexes({ indexes: [ { key: { username: 1 }, name: 'Username Index' } ] });
    }
}