<?php

/*
 * Copyright © 2020 Miguel Nogueira
 *
 *   This file is part of Raspberry Staff Manager.
 *
 *     Raspberry Staff Manager is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     Raspberry Staff Manager is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with Raspberry Staff Manager.  If not, see <https://www.gnu.org/licenses/>.
 */


namespace App\Helpers;

use App\Exceptions\AccountNotLinkedException;
use App\User;
use Illuminate\Http\Client\RequestException;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Crypt;
use Illuminate\Support\Facades\Http;

// Small wrapper for the necessary sections of the Discord API; A library is overkill here
class Discord
{

    /**
     * The current working guild. Default is Home guild from app config
     * @var string
     */
    protected string $workingGuild;


    /**
     * Current user.
     *
     * @var User The user all methods will affect.
     */
    protected User $user;


    public function __construct() {
        if (!is_null($this->workingGuild)) {
            $this->setWorkingGuild(config('services.discord.home_guild'));
        }
    }


    /**
     * Sets the working guild
     *
     * @param string $workingGuild
     * @return Discord
     */
    public function setWorkingGuild(string $workingGuild): Discord
    {
        $this->workingGuild = $workingGuild;
        return $this;
    }

    /**
     * Sets the current user, upon validation
     *
     * @param User $user
     * @return Discord
     * @throws AccountNotLinkedException
     */
    public function setUser(User $user): Discord
    {
       if ($user->hasDiscordConnection()) {
           $this->user = $user;
           return $this;
       }

       throw new AccountNotLinkedException('Specified website user has not linked their Discord account yet.');
    }


    /**
     * Adds current working user to current working guild. Bot must be member of target guild, and account must be linked
     *
     * @return object|bool A GuildMember object; false if member is already in guild
     * @throws RequestException Any client and server errors
     * @see https://discord.com/developers/docs/resources/guild#guild-member-object
     */
    public function addGuildMember(): object|bool
    {
        $params = [
            'access_token' => $this->user->discord_token
        ];

        $member = Http::withBody(json_encode($params), 'application/json')
            ->withHeaders([
                'Authorization' => 'Bot ' . config('services.discord.token')
            ])->put(config('services.discord.base_url') . "/guilds/{$this->workingGuild}/members/{$this->user->discord_user_id}")
            ->throw();

        if ($member->successful() && $member->status() == 204) {
            return false;
        } else {
            return (object) $member->json();
        }
    }


    /**
     * Bans a specified user from the guild.
     * May be called from the suspension service optionally by the banning user
     *
     * @param string $reason The reason to supply Discord with
     * @return void Nothing on success
     * @throws RequestException
     * @throws AccountNotLinkedException
     */
    public function addGuildBan(string $reason): void {
        Http::withHeaders([
            'Authorization' => 'Bot ' . config('services.discord.token'),
            'X-Audit-Log-Reason' => $reason
        ])->put(config('services.discord.base_url') . "/guilds/{$this->workingGuild}/bans/{$this->user->discord_user_id}")
            ->throw();

        throw new AccountNotLinkedException('Specified website user has not linked their Discord account yet.');
    }

    /**
     * Gets (possible) ban for current user.
     *
     * @return object|bool Ban object if user is banned. Null
     * @throws RequestException
     */
    public function getGuildBan(): object|bool
    {
        $ban = Http::withHeaders([
            'Authorization' => 'Bot ' . config('services.discord.token')
        ])->get(config('services.discord.base_url') . "/guilds/{$this->workingGuild}/bans/{$this->user->discord_user_id}");

        if ($ban->status() == 404) {
            return false;
        }

        return ($ban->successful()) ? (object) $ban->json() : $ban->throwIf($ban->status() !== 404);
    }


}