<?php

namespace App\Http\Controllers;

use OwenVoke\Gitea\Client;
use Illuminate\Http\Request;
use DateTime;

class GiteaApiController extends Controller
{
    private $giteaClient;
    private $organization;

    public function __construct()
    {
        $this->organization = getenv('GITEA_ORGANIZATION');
        $this->giteaClient = new Client(null, null, getenv('GITEA_URL'));
        $this->giteaClient->authenticate(getenv('GITEA_TOKEN'), null, Client::AUTH_ACCESS_TOKEN);
    }

    private function get_repositories()
    {
        $repositories = $this->giteaClient->organizations()->repositories($this->organization, 1, 9999);
        return $repositories;
    }

    private function get_issues(string $repository, array $parameters = array())
    {
        return $issues = $this->giteaClient->repositories()->issues()->all($this->organization, $repository, $parameters);
    }

    private function get_issue_total_time(string $repository, int $id)
    {
        $times = $this->giteaClient->repositories()->issues()->times($this->organization, $repository, $id);
        $count = 0;
        foreach ($times as $time) {
            $count += (int) $time['time'];
        }

        return $count;
    }

    private function get_issue_labels(array $issue)
    {
        $labels = '';
        foreach ($issue['labels'] as $label) {
            $labels .= $label['name'] . ',';
        }
        return $labels;
    }

    private function create_columns(array $issue)
    {
        return array(
            'Progetto'  => $issue['repository']['name'],
            '#'         => $issue['number'],
            'Titolo'    => $issue['title'],
            'URL'       => $issue['html_url'],
            'Aperto_il' => $issue['created_at'],
            'Chiuso_il' => $issue['closed_at'],
            'Etichette' => $this->get_issue_labels($issue),
            'Tempo'     => gmdate('H:i:s', $this->get_issue_total_time($issue['repository']['name'], $issue['number']))
        );
    }

    private function create_csv(string $file_name, array $data)
    {
        $f = fopen('php://output', 'w'); // Configure fopen to create, open, and write data.

        fputcsv($f, array_keys($data[0])); // Add the keys as the column headers
        // Loop over the array and passing in the values only.
        foreach ($data as $row) {
            fputcsv($f, $row);
        }
        fclose($f);
        // tell the browser it's going to be a csv file
        header('Content-Type: text/csv');
        // tell the browser we want to save it instead of displaying it
        header('Content-Disposition: attachment; filename="' . $file_name . '.csv";');
        exit();
    }

    private function date_to_datetime(string $date)
    {
        $date = str_replace('/', '-', $date);
        $datetime = new DateTime($date);

        return $datetime->format('Y-m-d H:i:s');
    }

    private function export_issues(string $from_date, array $issues_params)
    {
        $data = array();
        $repositories = $this->get_repositories();
        foreach ($repositories as $repository) {
            $issues = $this->get_issues($repository['name'], $issues_params);
            foreach ($issues as $issue) {
                $from_datetime = $this->date_to_datetime($from_date);
                if (substr($issue['closed_at'], 0, 19) > $from_datetime) {
                    $data[] = $this->create_columns($issue);
                }
            }
        }

        $file_name = date('Y_F', strtotime(explode(' ', $data[0]['Chiuso_il'])[0]));
        $this->create_csv($file_name, $data);
    }

    public function export_closed_issues(Request $req)
    {
        if ($req->input('token') != getenv('GITEA_TOKEN')) {
            return redirect('/');
        }
        $date = $req->input('year') . '-' . $req->input('month') . '-01';
        $this->export_issues($date, ['state' => 'closed']);
        return view('backend', [
            'token' => getenv('GITEA_TOKEN')
        ]);
    }
}