/*  This file is part of FediBlock-backend.
 *  Copyright © 2020, 2021 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "cgi.hpp"
#include "config.hpp"
#include "files.hpp"
#include "fs-compat.hpp"
#include "git.hpp"
#include "gitea.hpp"
#include "json.hpp"
#include "types.hpp"

#include <git2/global.h>

#include <cstdlib>
#include <exception>
#include <iostream>

using std::cerr;
using std::cout;
using std::exception;
using std::getenv;

using namespace FediBlock;

int main()
{
    cout << "Content-Type: text/plain; charset=utf-8\r\n\r\n";

    char *env{getenv("REQUEST_METHOD")};
    if (env != nullptr && string(env) != "POST")
    {
        return 0;
    }

    git::init(true);
    gitea::init();

    try
    {
        const entry_type entry{cgi::parse_formdata()};
        if (entry.instance.empty() || entry.tags.empty()
            || entry.receipts.empty() || entry.description.empty())
        {
            // Probably spam, since the input fields are marked as required.
            cout << "One of the required fields (Instance, Tags, Receipts, "
                    "Description) was not filled.\r\n"
                 << "Please use the back button, complete the form and submit "
                    "again.\r\n";
            return 1;
        }

        git::update_cached_repo();
        git::create_branch();
        git::commit(entry);
        git::push();

        gitea::pull_request(git::get_branch_name(), entry);

        cout << "Created pull request: <https://" << config::forge_domain << "/"
             << config::forge_org << "/" << config::forge_repo_data << "/pulls/"
             << gitea::get_last_pr_number() << ">.\r\n";
        cout << "Your entry needs to be approved before it appears on the "
                "website. You can subscribe to notifications or add comments "
                "at the URL above.\r\n";

        files::remove_tmpdir();
    }
    catch (const SpamException &e)
    {
        cerr << e.what() << '\n';
        cout << e.what() << "\r\n";
    }
    catch (const exception &e)
    {
        cerr << e.what() << '\n';
        cout << "An error happened: " << e.what() << "\r\n";
        cout << "Please report it at <https://" << config::forge_domain << "/"
             << config::forge_org << "/" << config::forge_repo_backend
             << "/issues>.\r\n";
    }

    gitea::cleanup();
    git::cleanup(true);

    return 0;
}