<?php

use App\Repository\BugRepository;
use App\Repository\ObsoletePatchRepository;
use App\Repository\PatchRepository;
use App\Utils\PatchTracker;
use App\Utils\Diff;

session_start();

// Obtain common includes
require_once '../include/prepend.php';

$obsoletePatchRepository = $container->get(ObsoletePatchRepository::class);
$patchRepository = $container->get(PatchRepository::class);
$patchTracker = $container->get(PatchTracker::class);

// Authenticate
bugs_authenticate($user, $pw, $logged_in, $user_flags);

if (!isset($_GET['bug_id']) && !isset($_GET['bug'])) {
    response_header('Error :: no bug selected');
    display_bug_error('No patch selected to view');
    response_footer();
    exit;
}

$canpatch = ($logged_in == 'developer');

$revision = isset($_GET['revision']) ? $_GET['revision'] : null;
$patch_name = isset($_GET['patch'])    ? $_GET['patch'] : null;
if ($patch_name) {
    $patch_name_url = urlencode($patch_name);
}

$bug_id = !empty($_GET['bug']) ? (int) $_GET['bug'] : 0;
if (empty($bug_id)) {
    $bug_id = (int) $_GET['bug_id'];
}

$bugRepository = $container->get(BugRepository::class);

if (!($buginfo = $bugRepository->findOneById($bug_id))) {
    response_header('Error :: invalid bug selected');
    display_bug_error("Invalid bug #{$bug_id} selected");
    response_footer();
    exit;
}

if (!bugs_has_access($bug_id, $buginfo, $pw, $user_flags)) {
    response_header('Error :: No access to bug selected');
    display_bug_error("You have no access to bug #{$bug_id}");
    response_footer();
    exit;
}

if (isset($patch_name) && isset($revision)) {
    if ($revision == 'latest') {
        $revisions = $patchRepository->findRevisions($buginfo['id'], $patch_name);
        if (isset($revisions[0])) {
            $revision = $revisions[0]['revision'];
        }
    }

    $path = $patchTracker->getPatchFullpath($bug_id, $patch_name, $revision);
    if (!file_exists($path)) {
        response_header('Error :: no such patch/revision');
        display_bug_error('Invalid patch/revision specified');
        response_footer();
        exit;
    }

    if (isset($_GET['download'])) {
        header('Last-modified: ' . gmdate('l, d-M-y H:i:s \G\M\T', filemtime($path)));
        header('Content-type: application/octet-stream');
        header('Content-disposition: attachment; filename="' . $patch_name . '.patch.txt"');
        header('Content-length: '.filesize($path));
        readfile($path);
        exit;
    }

    try {
        $patchcontents = $patchRepository->getPatchContents($buginfo['id'], $patch_name, $revision);
    } catch (\Exception $e) {
        response_header('Error :: Cannot retrieve patch');
        display_bug_error('Internal error: Invalid patch/revision specified (is in database, but not in filesystem)');
        response_footer();
        exit;
    }

    $package_name = $buginfo['package_name'];
    $handle = $patchRepository->findDeveloper($bug_id, $patch_name, $revision);
    $obsoletedby = $obsoletePatchRepository->findObsoletingPatches($bug_id, $patch_name, $revision);
    $obsoletes = $obsoletePatchRepository->findObsoletePatches($bug_id, $patch_name, $revision);
    $patches = $patchRepository->findAllByBugId($bug_id);
    $revisions = $patchRepository->findRevisions($bug_id, $patch_name);

    response_header("Bug #{$bug_id} :: Patches");
    include "{$ROOT_DIR}/templates/listpatches.php";

    if (isset($_GET['diff']) && $_GET['diff'] && isset($_GET['old']) && is_numeric($_GET['old'])) {
        $old = $patchTracker->getPatchFullpath($bug_id, $patch_name, $_GET['old']);
        $new = $path;
        if (!realpath($old) || !realpath($new)) {
            response_header('Error :: Cannot retrieve patch');
            display_bug_error('Internal error: Invalid patch revision specified for diff');
            response_footer();
            exit;
        }

        assert_options(ASSERT_WARNING, 0);

        $d = new \Horde_Text_Diff('auto', [file($old), file($new)]);
        $diff = new Diff($d);

        include "{$ROOT_DIR}/templates/patchdiff.php";

        response_footer();
        exit;
    }
    include "{$ROOT_DIR}/templates/patchdisplay.php";
    response_footer();
    exit;
}

$patches = $patchTracker->listPatches($bug_id);
response_header("Bug #{$bug_id} :: Patches");
include "{$ROOT_DIR}/templates/listpatches.php";
response_footer();