<?php

if (!defined('GLPI_ROOT')) {
    die("Sorry. You can't access this file directly");
}

class PluginRedmineConfig extends CommonDBTM {
    
    /**
     * Define the tab name
     * @param int $nb
     * @return string
     */
    static function getTypeName($nb = 0) {
        return 'Redmine Integration';
    }

    /**
     * Encrypt the API key before persisting it.
     * An empty key on update means "keep the current one".
     * @param array $input
     * @return array
     */
    function prepareInputForUpdate($input) {
        if (array_key_exists('api_key', $input)) {
            if ($input['api_key'] === '' || $input['api_key'] === null) {
                unset($input['api_key']); // keep the stored key
            } else {
                $input['api_key'] = (new \GLPIKey())->encrypt((string) $input['api_key']);
            }
        }
        // The status map is posted as status_map[<glpi_status>] = <redmine_status_id>.
        if (isset($input['status_map']) && is_array($input['status_map'])) {
            $input['status_map'] = json_encode($input['status_map']);
        }
        // Default watchers come from a multiselect (array of Redmine user ids).
        if (isset($input['default_watcher_ids'])) {
            $ids = is_array($input['default_watcher_ids']) ? $input['default_watcher_ids'] : [];
            $input['default_watcher_ids'] = json_encode(array_values(array_filter(array_map('intval', $ids))));
        }
        return $input;
    }

    /**
     * Return the (single) config row.
     * @return array
     */
    public static function getConfigRow() {
        global $DB;
        $it = $DB->request(['FROM' => 'glpi_plugin_redmine_configs', 'WHERE' => ['id' => 1]]);
        return count($it) > 0 ? $it->current() : [];
    }

    /**
     * Resolve the Redmine user for a GLPI user.
     * Priority: manual override (usermap) -> e-mail auto-match against the cache.
     * @param int $glpi_users_id
     * @return array|null  Redmine user cache row [redmine_id, login, mail, name] or null
     */
    public static function resolveRedmineUser($glpi_users_id) {
        global $DB;
        $glpi_users_id = (int) $glpi_users_id;
        if ($glpi_users_id <= 0) {
            return null;
        }

        // 1) Manual override
        $ov = $DB->request([
            'FROM'  => 'glpi_plugin_redmine_usermap',
            'WHERE' => ['users_id' => $glpi_users_id]
        ]);
        if (count($ov) > 0) {
            $rid = (int) $ov->current()['redmine_user_id'];
            $ru = $DB->request(['FROM' => 'glpi_plugin_redmine_users', 'WHERE' => ['redmine_id' => $rid]]);
            if (count($ru) > 0) {
                return $ru->current();
            }
        }

        // 2) E-mail auto-match (cache local)
        $email = \UserEmail::getDefaultForUser($glpi_users_id);
        if (!empty($email)) {
            $ru = $DB->request(['FROM' => 'glpi_plugin_redmine_users', 'WHERE' => ['mail' => $email]]);
            if (count($ru) > 0) {
                return $ru->current();
            }

            // 3) Self-healing: cache pode estar vazio/desatualizado — busca ao
            // vivo no Redmine e grava no cache para as próximas resoluções.
            $live = PluginRedmineRedmineapi::findUserByEmail($email);
            if ($live && !empty($live['login'])) {
                $row = [
                    'redmine_id' => (int) $live['id'],
                    'login'      => $live['login'],
                    'mail'       => $live['mail'] ?? $email,
                    'name'       => trim(($live['firstname'] ?? '') . ' ' . ($live['lastname'] ?? '')),
                ];
                $DB->delete('glpi_plugin_redmine_users', ['redmine_id' => $row['redmine_id']]);
                $DB->insert('glpi_plugin_redmine_users', $row);
                Toolbox::logInFile('redmine', "Cache de usuários atualizado ao vivo para '{$email}' -> {$row['login']}.\n");
                return $row;
            }
        }

        return null;
    }

    /**
     * @return int default Redmine role id used for auto-membership
     */
    public static function getDefaultRoleId() {
        return (int) (self::getConfigRow()['default_role_id'] ?? 0);
    }

    /**
     * @return int[] configured default watcher Redmine user ids
     */
    public static function getDefaultWatcherIds() {
        $raw = self::getConfigRow()['default_watcher_ids'] ?? '';
        if (empty($raw)) {
            return [];
        }
        $ids = json_decode($raw, true);
        return is_array($ids) ? array_values(array_map('intval', $ids)) : [];
    }

    /**
     * Map a GLPI ticket status to the configured Redmine status id.
     * @param int $glpi_status
     * @return int|null
     */
    public static function mapTicketStatus($glpi_status) {
        $row = self::getConfigRow();
        if (empty($row['status_map'])) {
            return null;
        }
        $map = json_decode($row['status_map'], true);
        if (!is_array($map) || empty($map[$glpi_status])) {
            return null;
        }
        return (int) $map[$glpi_status];
    }

    /**
     * Build a {id: name} options map from a Redmine metadata list.
     * @param array $list
     * @return array
     */
    private static function toOptions($list) {
        $opt = [];
        foreach (($list ?? []) as $el) {
            if (isset($el['id'], $el['name'])) {
                $opt[$el['id']] = $el['name'];
            }
        }
        return $opt;
    }

    /**
     * Show config form
     * @param int $ID
     * @param array $options
     * @return boolean
     */
    function showForm($ID, array $options = []) {
        global $DB;

        // Fetch config
        $config = [];
        $iterator = $DB->request([
            'FROM' => 'glpi_plugin_redmine_configs',
            'WHERE' => ['id' => 1]
        ]);
        if (count($iterator) > 0) {
            $config = $iterator->current();
        }

        $metadata = !empty($config['metadata_cache']) ? json_decode($config['metadata_cache'], true) : [];
        $status_map = !empty($config['status_map']) ? json_decode($config['status_map'], true) : [];
        $watcher_ids = self::getDefaultWatcherIds();

        // Redmine users (from cache) -> "Nome (login)" options
        $redmine_user_options = [];
        foreach ($DB->request(['FROM' => 'glpi_plugin_redmine_users', 'ORDER' => 'name']) as $u) {
            $redmine_user_options[$u['redmine_id']] = trim($u['name']) . ' (' . $u['login'] . ')';
        }

        // Existing manual overrides (GLPI user -> Redmine user) with display names
        $usermap = [];
        foreach ($DB->request(['FROM' => 'glpi_plugin_redmine_usermap']) as $row) {
            $usermap[] = [
                'id'           => $row['id'],
                'users_id'     => $row['users_id'],
                'glpi_name'    => getUserName($row['users_id']),
                'redmine_name' => $redmine_user_options[$row['redmine_user_id']] ?? ('#' . $row['redmine_user_id']),
            ];
        }

        \Glpi\Application\View\TemplateRenderer::getInstance()->display('@redmine/config_form.html.twig', [
            'action_url'           => Toolbox::getItemTypeFormURL(__CLASS__),
            'csrf_token_value'     => Session::getNewCSRFToken(),
            'redmine_url'          => $config['redmine_url'] ?? '',
            'has_key'              => !empty($config['api_key']),
            'has_metadata'         => !empty($metadata['trackers']) || !empty($metadata['statuses']),
            'tracker_options'      => self::toOptions($metadata['trackers'] ?? []),
            'priority_options'     => self::toOptions($metadata['priorities'] ?? []),
            'activity_options'     => self::toOptions($metadata['activities'] ?? []),
            'status_options'       => self::toOptions($metadata['statuses'] ?? []),
            'role_options'         => self::toOptions($metadata['roles'] ?? []),
            'redmine_user_options' => $redmine_user_options,
            'default_tracker_id'   => (int) ($config['default_tracker_id'] ?? 0),
            'default_priority_id'  => (int) ($config['default_priority_id'] ?? 0),
            'default_activity_id'  => (int) ($config['default_activity_id'] ?? 0),
            'default_role_id'      => (int) ($config['default_role_id'] ?? 0),
            'default_watcher_ids'  => $watcher_ids,
            'status_map'           => is_array($status_map) ? $status_map : [],
            'glpi_ticket_statuses' => \Ticket::getAllStatusArray(),
            'usermap'              => $usermap,
            'user_cache_count'     => count($redmine_user_options),
        ]);

        return true;
    }
}