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<?php
    declare(strict_types=1);
    /**
     * Composer management
     *
     * Generic support for Composer-backed packages
     *
     * @package core
     */

    namespace Module\Support\Webapps;

    use Cache_Super_Global;
    use Module\Support\Webapps;
    use Opcenter\Versioning;

    class Composer extends Webapps
    {
        const APP_NAME = "Composer";
        const DEFAULT_VERSION_LOCK = 'minor';
        const VERSION_CHECK_BASE = 'https://packagist.org/p';
        const PACKAGIST_NAME = '';

        /**
         * Check package dependency
         *
         * @param string      $hostname
         * @param string      $path
         * @param string|null $plugin
         * @return array|bool|void
         */
        public function plugin_status(string $hostname, string $path = '', string $plugin = null)
        {
            return error("not supported");
        }

        /**
         * Uninstall Composer package
         *
         * @param string $hostname
         * @param string $path
         * @param string $plugin
         * @param bool   $force
         * @return bool
         */
        public function uninstall_plugin(string $hostname, string $path = '', string $plugin, bool $force = false): bool
        {
            return error("not supported");
        }

        /**
         * Remove all packages
         *
         * Blocked because it's a Really Bad Idea(TM)
         *
         * @param string $hostname
         * @param string $path
         * @return bool
         */
        public function disable_all_plugins(string $hostname, string $path = ''): bool
        {
            return error("not supported");
        }

        /**
         * Get next Composer version
         *
         * @param string $version
         * @param string $maximalbranch
         * @return null|string
         */
        public function next_version(string $version, string $maximalbranch = '99999999.99999999.99999999'): ?string
        {
            return parent::next_version($version, $maximalbranch);
        }

        /**
         * Reconfigure a Composer instance
         *
         * @param            $field
         * @param string     $attribute
         * @param array      $new
         * @param array|null $old
         */
        public function reconfigure(string $field, string $attribute, array $new, array $old = null)
        {

            // ghost config url <newurl>
        }

        public function get_configuration($field)
        {

        }

        /**
         * Install Composer into a pre-existing location
         *
         * @param string $hostname domain or subdomain to install Laravel
         * @param string $path     optional path under hostname
         * @param array  $opts     additional install options
         * @return bool
         */
        public function install(string $hostname, string $path = '', array $opts = array()): bool
        {
            return error("not supported");
        }

        /**
         * Install and activate Composer package
         *
         * @param string $hostname domain or subdomain of wp install
         * @param string $path     optional path component of wp install
         * @param string $plugin   plugin name
         * @param string $version  optional plugin version
         * @return bool
         */
        public function install_plugin(
            string $hostname,
            string $path = '',
            string $plugin,
            string $version = 'stable'
        ): bool {
            return info("todo");
        }

        /**
         * Uninstall Composer backed package from a location
         *
         * @param        $hostname
         * @param string $path
         * @param string $delete remove all files under docroot
         * @return bool
         */
        public function uninstall(string $hostname, string $path = '', string $delete = 'all'): bool
        {
            return parent::uninstall($hostname, $path, $delete);
        }

        /**
         * Get database configuration
         *
         * @param string $hostname domain or subdomain of wp blog
         * @param string $path     optional path
         * @return bool|array
         */
        public function db_config(string $hostname, string $path = '')
        {
            return [];
        }

        /**
         * Check if version is latest or get latest version
         *
         * @param null|string $version
         * @param string|null $branchcomp
         * @return bool
         */
        public function is_current(string $version = null, string $branchcomp = null)
        {
            return parent::is_current($version, $branchcomp);
        }

        /**
         * Change Composer admin credentials
         *
         * Common fields include: password, email, name; email doubles as login
         *
         * @param string $hostname
         * @param string $path
         * @param array  $fields
         * @return bool
         */
        public function change_admin(string $hostname, string $path = '', array $fields): bool
        {
            return false;
        }

        /**
         * Get the primary admin for a WP instance
         *
         * @param string      $hostname
         * @param null|string $path
         * @return string admin or false on failure
         */
        public function get_admin(string $hostname, string $path = ''): ?string
        {
            return null;
        }

        /**
         * Get Laravel application name
         *
         * @param string $hostname
         * @param string $path
         * @return string|null declared name
         */
        public function get_appname($hostname, $path = '')
        {
            $approot = $this->getAppRoot($hostname, $path);
            $path = $this->domain_fs_path($approot);
            $info = $path . '/composer.json';
            if (!file_exists($info)) {
                return null;
            }
            $json = json_decode(file_get_contents($info));

            return !empty($json->name) ? $json->name : null;

        }

        /**
         * Get app root for Composer
         *
         * @param string $hostname
         * @param string $path
         * @return null|string
         */
        protected function getAppRoot(string $hostname, string $path = ''): ?string
        {
            // Composer/Laravel app root resides 1 level down
            $path = $this->web_normalize_path($hostname, $path);

            return $path ? \dirname($path) : null;
        }

        /**
         * Update core, plugins, and themes atomically
         *
         * @param string $hostname subdomain or domain
         * @param string $path     optional path under hostname
         * @param string $version
         * @return bool
         */
        public function update_all(string $hostname, string $path = '', string $version = null): bool
        {
            return $this->update($hostname, $path, $version) || error("failed to update all components");
        }

        /**
         * Update Composer to latest version
         *
         * @param string $hostname domain or subdomain under which WP is installed
         * @param string $path     optional subdirectory
         * @param string $version
         * @return bool
         */
        public function update(string $hostname, string $path = '', string $version = null): bool
        {
            $approot = $this->getAppRoot($hostname, $path);
            if (!$approot) {
                return error("update failed");
            }
            if (!$version) {
                $version = Versioning::nextVersion($this->get_versions(),
                    $this->get_version($hostname, $path));
            } else if (!Versioning::valid($version)) {
                return error("invalid version number, %s", $version);
            }

            $cmd = 'composer update';
            $args['version'] = $version;
            $ret = $this->_exec($approot, $cmd, $args);
            parent::setInfo($approot, [
                'version' => $this->get_version($hostname, $path),
                'failed'  => !$ret['success']
            ]);

            return $ret['success'];
        }

        /**
         * Get all available Composer versions
         *
         * @return array
         */
        public function get_versions(): array
        {
            if (!static::PACKAGIST_NAME) {
                return $this->_getVersions();
            }

            return $this->getPackagistVersions(static::PACKAGIST_NAME);
        }

        protected function getPackagistVersions(string $package): array
        {
            $key = $package . '.verflat';
            $cache = \Cache_Global::spawn();
            if (false !== ($versions = $cache->get($key))) {
                return array_values($versions);
            }
            $versions = array_column(array_filter($this->_getVersions($package), static function ($ver) {
                return false === strpos($ver['version_normalized'], '-') && $ver['version'][0] === 'v';
            }), 'version_normalized');
            natsort($versions);
            array_walk($versions, static function (&$ver) {
                $ver = implode('.', array_slice(explode('.', $ver), 0, 3));
            });

            $cache->set($key, $versions);

            return array_values($versions);
        }

        /**
         * Get all current major versions
         *
         * @return array
         */
        protected function _getVersions(string $name = null)
        {
            $name = $name ?? static::PACKAGIST_NAME;
            if (!$name) {
                return [];
            }

            $key = $name . '.versions';
            $cache = Cache_Super_Global::spawn();
            if (false !== ($ver = $cache->get($key))) {
                return $ver;
            }
            $url = self::VERSION_CHECK_BASE . '/' . $name . '.json';
            $contents = file_get_contents($url);
            if (!$contents) {
                return array();
            }
            $versions = json_decode($contents, true);
            if (!$versions || empty($versions['packages'])) {
                return array();
            }
            $versions = $versions['packages'][$name];
            $cache->set($key, $versions, 43200);

            return $versions;
        }


        /**
         * Restrict version semantically
         *
         * @param string $lockType
         * @param string $version
         * @return string
         */
        protected function parseLock(string $lockType, string $version): string
        {
            switch ($lockType) {
                case 'major':
                    return '~' . Versioning::asMinor($version);
                case 'minor':
                    return Versioning::asMinor($version) . '.*';
                case 'patch':
                    return $version;
                case '':
                    return '>' . $version;
                default:
                    warn("unknown lock type `%s' - restricting to `%s'", $lockType, $version);

                    return $version;
            }
        }

        /**
         * Get installed version
         *
         * @param string $hostname
         * @param string $path
         * @return string version number
         */
        public function get_version(string $hostname, string $path = ''): ?string
        {
            if (!$this->valid($hostname, $path)) {
                return null;
            }
            $approot = $this->getAppRoot($hostname, $path);
            if (!static::PACKAGIST_NAME) {
                // no package name defined for module, pull from "version" attribute in root
                $path = $this->domain_fs_path() . $approot . '/composer.json';
                if (!file_exists($path)) {
                    warn("missing composer.json from project root - cannot detect version");

                    return null;
                }

                return json_decode(file_get_contents($path))->version ?? null;
            }
            $path = $this->domain_fs_path($approot . '/vendor/composer/installed.json');

            if (!file_exists($path) || !($json = json_decode(file_get_contents($path), true))) {
                return null;
            }
            foreach ($json as $pkg) {
                if ($pkg['name'] === static::PACKAGIST_NAME) {
                    return Versioning::asPatch($pkg['version_normalized']);
                }
            }

            return null;
        }

        /**
         * Location is a valid WP install
         *
         * @param string $hostname or $docroot
         * @param string $path
         * @return bool
         */
        public function valid(string $hostname, string $path = ''): bool
        {
            if ($hostname[0] == '/') {
                $approot = \dirname($hostname);
            } else {
                $approot = $this->getAppRoot($hostname, $path);
                if (!$approot) {
                    return false;
                }
            }

            return file_exists($this->domain_fs_path() . $approot . '/composer.json');
        }

        /**
         * Update plugins
         *
         * @param string $hostname domain or subdomain
         * @param string $path     optional path within host
         * @param array  $plugins
         * @return bool
         */
        public function update_plugins(string $hostname, string $path = '', array $plugins = array()): bool
        {
            return error("not implemented");
        }

        /**
         * Update Laravel themes
         *
         * @param string $hostname subdomain or domain
         * @param string $path     optional path under hostname
         * @param array  $themes
         * @return bool
         */
        public function update_themes(string $hostname, string $path = '', array $themes = array()): bool
        {
            return error("not implemented");
        }

        /**
         * Web application supports fortification
         *
         * @param string|null $mode optional mode (min, max)
         * @return bool
         */
        public function has_fortification(string $mode = null): bool
        {
            return parent::has_fortification($mode);
        }

        /**
         * Restrict write-access by the app
         *
         * @param string $hostname
         * @param string $path
         * @param string $mode
         * @return bool
         */
        public function fortify(string $hostname, string $path = '', string $mode = 'max'): bool
        {
            if (isset($this->_aclList)) {
                return parent::fortify($hostname, $path, $mode);
            }

            return error("not implemented");
        }

        /**
         * Relax permissions to allow write-access
         *
         * @param string $hostname
         * @param string $path
         * @return bool
         * @internal param string $mode
         */
        public function unfortify(string $hostname, string $path = ''): bool
        {
            if (isset($this->_aclList)) {
                return parent::fortify($hostname, $path);
            }

            return error("not implemented");
        }

        /**
         * Laravel housekeeping
         *
         * @return bool
         */
        public function _housekeeping()
        {
            // nothing to do as Symfony is managed separately by
            // a the PHP module
            return true;
        }

        public function theme_status(string $hostname, string $path = '', string $theme = null)
        {
            return parent::theme_status($hostname, $path, $theme); // TODO: Change the autogenerated stub
        }

        public function install_theme(string $hostname, string $path = '', string $theme, string $version = null): bool
        {
            return parent::install_theme($hostname, $path, $theme, $version);
        }
    }