<?php
require_once '../misuzu.php';

$changelogOffset = max((int)($_GET['o'] ?? 0), 0);
$changelogRange = 30;

$changelogChange = (int)($_GET['c'] ?? 0);
$changelogDate = $_GET['d'] ?? '';
$changelogUser = (int)($_GET['u'] ?? 0);
$changelogTags = $_GET['t'] ?? '';

$commentPerms = comments_get_perms(user_session_current('user_id', 0));

tpl_vars([
    'changelog_offset' => $changelogOffset,
    'changelog_take' => $changelogRange,
    'comments_perms' => $commentPerms,
]);

if ($changelogChange > 0) {
    $getChange = db_prepare('
        SELECT
            c.`change_id`, c.`change_created`, c.`change_log`, c.`change_text`,
            a.`action_name`, a.`action_colour`, a.`action_class`,
            u.`user_id`, u.`username`,
            DATE(`change_created`) as `change_date`,
            COALESCE(u.`user_title`, r.`role_title`) as `user_title`,
            COALESCE(u.`user_colour`, r.`role_colour`) as `user_colour`
        FROM `msz_changelog_changes` as c
        LEFT JOIN `msz_users` as u
        ON u.`user_id` = c.`user_id`
        LEFT JOIN `msz_roles` as r
        ON r.`role_id` = u.`display_role`
        LEFT JOIN `msz_changelog_actions` as a
        ON a.`action_id` = c.`action_id`
        WHERE `change_id` = :change_id
    ');
    $getChange->bindValue('change_id', $changelogChange);
    $change = $getChange->execute() ? $getChange->fetch(PDO::FETCH_ASSOC) : [];

    if (!$change) {
        http_response_code(404);
    } else {
        $getTags = db_prepare('
            SELECT
                t.`tag_id`, t.`tag_name`, t.`tag_description`
            FROM `msz_changelog_tags` as t
            LEFT JOIN `msz_changelog_change_tags` as ct
            ON ct.`tag_id` = t.`tag_id`
            WHERE ct.`change_id` = :change_id
        ');
        $getTags->bindValue('change_id', $change['change_id']);
        $tags = $getTags->execute() ? $getTags->fetchAll(PDO::FETCH_ASSOC) : [];
        tpl_var('tags', $tags);
    }

    echo tpl_render('changelog.change', [
        'change' => $change,
        'comments_category' => $commentsCategory = comments_category_info(
            "changelog-date-{$change['change_date']}",
            true
        ),
        'comments' => comments_category_get($commentsCategory['category_id'], user_session_current('user_id', 0)),
    ]);
    return;
}

if (!empty($changelogDate)) {
    $dateParts = explode('-', $changelogDate, 3);

    if (count($dateParts) !== 3
        || !array_test($dateParts, 'is_user_int')
        || !checkdate($dateParts[1], $dateParts[2], $dateParts[0])) {
        echo render_error(404);
        return;
    }
}

$changesCount = !empty($changelogDate) ? -1 : changelog_count_changes($changelogDate, $changelogUser);
$changes = changelog_get_changes($changelogDate, $changelogUser, $changelogOffset, $changelogRange);

if (!$changes) {
    http_response_code(404);
}

if (!empty($changelogDate) && count($changes) > 0) {
    tpl_vars([
        'comments_category' => $commentsCategory = comments_category_info("changelog-date-{$changelogDate}", true),
        'comments' => comments_category_get($commentsCategory['category_id'], user_session_current('user_id', 0)),
    ]);
}

echo tpl_render('changelog.index', [
    'changes' => $changes,
    'changelog_count' => $changesCount,
    'changelog_date' => $changelogDate,
    'changelog_user' => $changelogUser,
]);