// serviceManager.js - Gestion du service systemd Pilot V2

import GLib from 'gi://GLib';
import Gio from 'gi://Gio';

/**
 * Gère les interactions avec le service systemd mqtt_pilot
 */
export class ServiceManager {
    constructor() {
        this.serviceName = 'mqtt_pilot.service';
    }

    /**
     * Exécute une commande systemctl
     */
    _executeSystemctl(action) {
        try {
            const command = `systemctl --user ${action} ${this.serviceName}`;
            const [success, stdout, stderr, exitStatus] = GLib.spawn_command_line_sync(command);

            if (exitStatus !== 0) {
                const decoder = new TextDecoder('utf-8');
                const errorMsg = decoder.decode(stderr);
                console.error(`systemctl ${action} failed: ${errorMsg}`);
                return false;
            }

            return true;
        } catch (error) {
            console.error(`Error executing systemctl: ${error.message}`);
            return false;
        }
    }

    /**
     * Vérifie si le service est actif
     */
    isServiceActive() {
        try {
            const command = `systemctl --user is-active ${this.serviceName}`;
            const [success, stdout, stderr, exitStatus] = GLib.spawn_command_line_sync(command);

            // Exit status 0 = active, 3 = inactive
            return exitStatus === 0;
        } catch (error) {
            console.error(`Error checking service status: ${error.message}`);
            return false;
        }
    }

    /**
     * Vérifie si le service est enabled
     */
    isServiceEnabled() {
        try {
            const command = `systemctl --user is-enabled ${this.serviceName}`;
            const [success, stdout, stderr, exitStatus] = GLib.spawn_command_line_sync(command);

            return exitStatus === 0;
        } catch (error) {
            console.error(`Error checking service enabled status: ${error.message}`);
            return false;
        }
    }

    /**
     * Démarre le service
     */
    startService() {
        console.log('Starting Pilot service...');
        return this._executeSystemctl('start');
    }

    /**
     * Arrête le service
     */
    stopService() {
        console.log('Stopping Pilot service...');
        return this._executeSystemctl('stop');
    }

    /**
     * Redémarre le service
     */
    restartService() {
        console.log('Restarting Pilot service...');
        return this._executeSystemctl('restart');
    }

    /**
     * Active le service au démarrage
     */
    enableService() {
        console.log('Enabling Pilot service...');
        return this._executeSystemctl('enable');
    }

    /**
     * Désactive le service au démarrage
     */
    disableService() {
        console.log('Disabling Pilot service...');
        return this._executeSystemctl('disable');
    }

    /**
     * Recharge la configuration du service
     */
    reloadService() {
        console.log('Reloading Pilot service configuration...');
        // Pour Pilot V2, on redémarre le service pour recharger la config
        return this.restartService();
    }

    /**
     * Obtient le status détaillé du service
     */
    getServiceStatus() {
        try {
            const command = `systemctl --user status ${this.serviceName}`;
            const [success, stdout, stderr, exitStatus] = GLib.spawn_command_line_sync(command);

            const decoder = new TextDecoder('utf-8');
            return {
                active: exitStatus === 0,
                output: decoder.decode(stdout)
            };
        } catch (error) {
            console.error(`Error getting service status: ${error.message}`);
            return {
                active: false,
                output: error.message
            };
        }
    }

    /**
     * Obtient les derniers logs du service
     */
    getServiceLogs(lines = 20) {
        try {
            const command = `journalctl --user -u ${this.serviceName} -n ${lines} --no-pager`;
            const [success, stdout, stderr, exitStatus] = GLib.spawn_command_line_sync(command);

            const decoder = new TextDecoder('utf-8');
            return decoder.decode(stdout);
        } catch (error) {
            console.error(`Error getting service logs: ${error.message}`);
            return `Error: ${error.message}`;
        }
    }
}