<?php

declare(strict_types=1);

namespace Shimmie2;

class ET extends Extension
{
    /** @var ETTheme */
    protected ?Themelet $theme;

    public function onPageRequest(PageRequestEvent $event)
    {
        global $user;
        if ($event->page_matches("system_info")) {
            if ($user->can(Permissions::VIEW_SYSINTO)) {
                $this->theme->display_info_page($this->to_yaml($this->get_info()));
            }
        }
    }

    public function onPageSubNavBuilding(PageSubNavBuildingEvent $event)
    {
        global $user;
        if ($event->parent==="system") {
            if ($user->can(Permissions::VIEW_SYSINTO)) {
                $event->add_nav_link("system_info", new Link('system_info'), "System Info", null, 10);
            }
        }
    }

    public function onUserBlockBuilding(UserBlockBuildingEvent $event)
    {
        global $user;
        if ($user->can(Permissions::VIEW_SYSINTO)) {
            $event->add_link("System Info", make_link("system_info"), 99);
        }
    }

    public function onCommand(CommandEvent $event)
    {
        if ($event->cmd == "help") {
            print "\tinfo\n";
            print "\t\tList a bunch of info\n\n";
        }
        if ($event->cmd == "info") {
            print($this->to_yaml($this->get_info()));
        }
    }

    /**
     * Collect the information and return it in a keyed array.
     */
    private function get_info(): array
    {
        global $config, $database;

        $core_exts = ExtensionInfo::get_core_extensions();
        $extra_exts = [];
        foreach (ExtensionInfo::get_all() as $info) {
            if ($info->is_enabled() && !in_array($info->key, $core_exts)) {
                $extra_exts[] = $info->key;
            }
        }

        $info = [
            "about" => [
                'title' => $config->get_string(SetupConfig::TITLE),
                'theme' => $config->get_string(SetupConfig::THEME),
                'url'   => make_http(make_link("/")),
            ],
            "versions" => [
                'shimmie' => VERSION,
                'schema'  => $config->get_int("db_version"),
                'php'     => phpversion(),
                'db'      => $database->get_driver_id()->value . " " . $database->get_version(),
                'os'      => php_uname(),
                'server'  =>  $_SERVER["SERVER_SOFTWARE"] ?? 'unknown',
            ],
            "extensions" => [
                "core" => $core_exts,
                "extra" => $extra_exts,
                "handled_mimes" => DataHandlerExtension::get_all_supported_mimes(),
            ],
            "stats" => [
                'images'   => (int)$database->get_one("SELECT COUNT(*) FROM images"),
                'comments' => (int)$database->get_one("SELECT COUNT(*) FROM comments"),
                'users'    => (int)$database->get_one("SELECT COUNT(*) FROM users"),
            ],
            "media" => [
                "memory_limit" => to_shorthand_int($config->get_int(MediaConfig::MEM_LIMIT)),
                "disk_use" => to_shorthand_int((int)disk_total_space("./") - (int)disk_free_space("./")),
                "disk_total" => to_shorthand_int((int)disk_total_space("./")),
            ],
            "thumbnails" => [
                "engine" => $config->get_string(ImageConfig::THUMB_ENGINE),
                "quality" => $config->get_int(ImageConfig::THUMB_QUALITY),
                "width" => $config->get_int(ImageConfig::THUMB_WIDTH),
                "height" => $config->get_int(ImageConfig::THUMB_HEIGHT),
                "scaling" => $config->get_int(ImageConfig::THUMB_SCALING),
                "mime" => $config->get_string(ImageConfig::THUMB_MIME),
            ],
        ];

        if (file_exists(".git")) {
            try {
                $commitHash = trim(exec('git log --pretty="%h" -n1 HEAD'));
                $commitBranch= trim(exec('git rev-parse --abbrev-ref HEAD'));
                $commitOrigin= trim(exec('git config --get remote.origin.url'));
                $commitOrigin= preg_replace("#//.*@#", "//xxx@", $commitOrigin);
                $info['git'] = [
                    'commit' => $commitHash,
                    'branch' => $commitBranch,
                    'origin' => $commitOrigin,
                ];
            } catch (\Exception $e) {
                // If we can't get git data, just skip it
            }
        }

        return $info;
    }

    private function to_yaml(array $info): string
    {
        $data = "";
        foreach ($info as $title => $section) {
            $data .= "$title:\n";
            foreach ($section as $k => $v) {
                $data .= "  $k: " . json_encode($v, JSON_UNESCAPED_SLASHES) . "\n";
            }
            $data .= "\n";
        }
        return $data;
    }
}