#!/usr/bin/env bash
# ==============================================================================
# NexusPBX - Script de Réparation Automatique des Permissions & Services
# ==============================================================================

set -e

if [ "$(id -u)" -ne 0 ]; then
    echo "[ERREUR] Ce script doit être exécuté en root."
    exit 1
fi

echo "-> Correction des répertoires Git et mise à jour..."
git config --global --add safe.directory /var/www/nexus-pbx 2>/dev/null || true
cd /var/www/nexus-pbx
git fetch origin main
git reset --hard origin/main

echo "-> Installation des outils de droits (ACL)..."
which setfacl >/dev/null 2>&1 || (apt-get update -y && apt-get install -y acl)

echo "-> Création des dossiers et des fichiers de journalisation..."
mkdir -p /etc/fail2ban/filter.d /etc/asterisk /var/log/asterisk /var/log/nexus-pbx /var/www/nexus-pbx/storage/backups

touch /var/log/asterisk/messages /var/log/asterisk/security.log /var/log/nexus_security.log
chown asterisk:asterisk /var/log/asterisk/messages /var/log/asterisk/security.log 2>/dev/null || true
chmod 0664 /var/log/asterisk/messages /var/log/asterisk/security.log 2>/dev/null || true
chown www-data:asterisk /var/log/nexus_security.log 2>/dev/null || true
chmod 0664 /var/log/nexus_security.log 2>/dev/null || true

echo "-> Filtres Fail2ban Asterisk & Nexus-Web..."
cat << 'EOF' > /etc/fail2ban/filter.d/asterisk.conf
[INCLUDES]
before = common.conf

[Definition]
failregex = ^(%(__prefix_line)s|\[\]\s*)*(?:NOTICE|SECURITY)\[\d+\]:? (?:\S+: )?(?:Registration from |Call from |Invalid password for |Sending fake auth challenge to |No matching endpoint found for )?'?<HOST>(?::\d+)?'?
            ^(%(__prefix_line)s|\[\]\s*)*SECURITY\[\d+\]:? (?:\S+: )?SecurityEvent="(?:FailedACL|InvalidAccountID|ChallengeResponseFailed|InvalidPassword|AuthFailed)"(?:.*?)RemoteAddress="IPV[46]/(?:UDP|TCP|TLS)/<HOST>/\d+"
ignoreregex =
EOF
chmod 0644 /etc/fail2ban/filter.d/asterisk.conf

cat << 'EOF' > /etc/fail2ban/filter.d/nexus-web.conf
[Definition]
failregex = ^.*\[NEXUS-WEB-AUTH-FAIL\]:\s*<HOST>.*$
ignoreregex =
EOF
chmod 0644 /etc/fail2ban/filter.d/nexus-web.conf

echo "-> Droits applicatifs et ACL POSIX (/etc/asterisk et /var/www/nexus-pbx)..."
usermod -aG asterisk www-data 2>/dev/null || true
usermod -aG www-data asterisk 2>/dev/null || true

chown -R www-data:asterisk /var/www/nexus-pbx
chmod 2775 /var/www/nexus-pbx/storage /var/www/nexus-pbx/storage/backups /var/www/nexus-pbx/public/avatars 2>/dev/null || true

touch /etc/asterisk/pjsip.conf \
      /etc/asterisk/pjsip.custom.conf \
      /etc/asterisk/extensions.conf \
      /etc/asterisk/extensions.custom.conf \
      /etc/asterisk/musiconhold.custom.conf \
      /etc/asterisk/voicemail.custom.conf \
      /etc/asterisk/rtp.conf \
      /etc/asterisk/features.conf 2>/dev/null || true

chown -R asterisk:asterisk /etc/asterisk /var/lib/asterisk /var/spool/asterisk /var/log/asterisk 2>/dev/null || true
chmod -R 775 /etc/asterisk
chmod 2775 /etc/asterisk
chmod 2750 /etc/asterisk/keys 2>/dev/null || true
chmod 0664 /etc/asterisk/*.conf /etc/asterisk/*.custom.conf 2>/dev/null || true

setfacl -R -m u:www-data:rwx,g:asterisk:rwx /etc/asterisk 2>/dev/null || true
setfacl -R -d -m u:www-data:rwx,g:asterisk:rwx /etc/asterisk 2>/dev/null || true

chown root:asterisk /etc/fail2ban/jail.local /etc/nginx/sites-available/nexus-pbx 2>/dev/null || true
chmod 0664 /etc/fail2ban/jail.local /etc/nginx/sites-available/nexus-pbx 2>/dev/null || true
setfacl -m u:www-data:rw /etc/fail2ban/jail.local /etc/nginx/sites-available/nexus-pbx 2>/dev/null || true

cat << 'EOF' > /etc/sudoers.d/nexus-pbx
www-data ALL=(ALL) NOPASSWD: /usr/sbin/asterisk, /usr/sbin/nginx, /usr/bin/systemctl, /usr/bin/fail2ban-client, /var/www/nexus-pbx/scripts/nexus-firewall, /usr/bin/certbot, /usr/sbin/nft, /usr/sbin/iptables
EOF
chmod 0440 /etc/sudoers.d/nexus-pbx

echo "-> Autorisation d'écriture systemd pour PHP-FPM (Debian 12/13 ProtectSystem)..."
for fpm_svc in /lib/systemd/system/php*-fpm.service /usr/lib/systemd/system/php*-fpm.service; do
    if [ -f "$fpm_svc" ]; then
        svc_name=$(basename "$fpm_svc")
        mkdir -p "/etc/systemd/system/${svc_name}.d"
        cat << 'EOF_OVERRIDE' > "/etc/systemd/system/${svc_name}.d/override.conf"
[Service]
ReadWritePaths=/etc/asterisk /etc/fail2ban /etc/nginx /var/log
EOF_OVERRIDE
    fi
done
systemctl daemon-reload

echo "-> Génération des configurations Asterisk..."
php -r '
require_once "/var/www/nexus-pbx/src/Database.php";
require_once "/var/www/nexus-pbx/src/ConfigGenerator.php";
$db = App\Database::getConnection();
$gen = new App\ConfigGenerator($db);
$gen->writeAllConfigs();
' 2>/dev/null || true

echo "-> Redémarrage des services..."
systemctl daemon-reload
systemctl restart php*-fpm 2>/dev/null || true
PHP_SVC=$(systemctl list-unit-files --type=service 2>/dev/null | grep -E "php.*-fpm" | awk '{print $1}' | head -n 1 || echo "")
if [ -n "$PHP_SVC" ]; then
    systemctl restart "$PHP_SVC" 2>/dev/null || true
fi
systemctl restart asterisk 2>/dev/null || true
systemctl restart fail2ban 2>/dev/null || true
systemctl restart nginx 2>/dev/null || true

echo ""
echo "=========================================================="
echo " [OK] Réparation terminée ! Toutes les permissions sont actives."
echo "=========================================================="
/var/www/nexus-pbx/scripts/nexus-banner.sh --force || true