<?php
namespace Misuzu;

use DateTimeInterface;
use RuntimeException;
use Index\DateTime;
use Misuzu\AuditLog;
use Misuzu\Changelog\Changelog;
use Misuzu\Users\User;
use Misuzu\Users\UserNotFoundException;

require_once '../../../misuzu.php';

if(!User::hasCurrent() || !perms_check_user(MSZ_PERMS_CHANGELOG, User::getCurrent()->getId(), MSZ_PERM_CHANGELOG_MANAGE_CHANGES)) {
    echo render_error(403);
    return;
}

$changeActions = [];
foreach(Changelog::ACTIONS as $action)
    $changeActions[$action] = Changelog::actionText($action);

$changelog = $msz->getChangelog();
$changeId = (string)filter_input(INPUT_GET, 'c', FILTER_SANITIZE_NUMBER_INT);
$loadChangeInfo = fn() => $changelog->getChangeById($changeId, withTags: true);
$changeTags = $changelog->getAllTags();

if(empty($changeId))
    $isNew = true;
else
    try {
        $isNew = false;
        $changeInfo = $loadChangeInfo();
    } catch(RuntimeException $ex) {
        echo render_error(404);
        return;
    }

if($_SERVER['REQUEST_METHOD'] === 'GET' && !empty($_GET['delete'])) {
    if(CSRF::validateRequest()) {
        $changelog->deleteChange($changeInfo);
        AuditLog::create(AuditLog::CHANGELOG_ENTRY_DELETE, [$changeInfo->getId()]);
        url_redirect('manage-changelog-changes');
    } else render_error(403);
    return;
}

// make errors not echos lol
while($_SERVER['REQUEST_METHOD'] === 'POST' && CSRF::validateRequest()) {
    $action = trim((string)filter_input(INPUT_POST, 'cl_action'));
    $summary = trim((string)filter_input(INPUT_POST, 'cl_summary'));
    $body = trim((string)filter_input(INPUT_POST, 'cl_body'));
    $userId = (int)filter_input(INPUT_POST, 'cl_user', FILTER_SANITIZE_NUMBER_INT);
    $createdAt = trim((string)filter_input(INPUT_POST, 'cl_created'));
    $tags = filter_input(INPUT_POST, 'cl_tags', FILTER_DEFAULT, FILTER_REQUIRE_ARRAY);

    if($userId < 1) $userId = null;
    else $userId = (string)$userId;

    if(empty($createdAt))
        $createdAt = null;
    else {
        $createdAt = DateTime::createFromFormat(DateTimeInterface::ATOM, $createdAt . ':00Z');
        if($createdAt->getUnixTimeSeconds() < 0)
            $createdAt = null;
    }

    if($isNew) {
        $changeInfo = $changelog->createChange($action, $summary, $body, $userId, $createdAt);
    } else {
        if($action === $changeInfo->getAction())
            $action = null;
        if($summary === $changeInfo->getSummary())
            $summary = null;
        if($body === $changeInfo->getBody())
            $body = null;
        if($createdAt !== null && $createdAt->equals($changeInfo->getCreatedAt()))
            $createdAt = null;
        $updateUserInfo = $userId !== $changeInfo->getUserId();

        if($action !== null || $summary !== null || $body !== null || $createdAt !== null || $updateUserInfo)
            $changelog->updateChange($changeInfo, $action, $summary, $body, $updateUserInfo, $userId, $createdAt);
    }

    if(!empty($tags)) {
        $tCurrent = $changeInfo->getTagIds();
        $tApply = $tags;
        $tRemove = [];

        foreach($tCurrent as $tag)
            if(!in_array($tag, $tApply)) {
                $tRemove[] = $tag;
                $changelog->removeTagFromChange($changeInfo, $tag);
            }

        $tCurrent = array_diff($tCurrent, $tRemove);

        foreach($tApply as $tag)
            if(!in_array($tag, $tCurrent)) {
                $changelog->addTagToChange($changeInfo, $tag);
                $tCurrent[] = $tag;
            }
    }

    AuditLog::create(
        $isNew ? AuditLog::CHANGELOG_ENTRY_CREATE : AuditLog::CHANGELOG_ENTRY_EDIT,
        [$changeInfo->getId()]
    );

    if($isNew) {
        url_redirect('manage-changelog-change', ['change' => $changeInfo->getId()]);
        return;
    } else $changeInfo = $loadChangeInfo();
    break;
}

Template::render('manage.changelog.change', [
    'change_new' => $isNew,
    'change_info' => $changeInfo ?? null,
    'change_tags' => $changeTags,
    'change_actions' => $changeActions,
]);