#!/bin/bash
# =============================================================================
# gitea-backup.sh — Backup complet Gitea (DB + volumes + config)
# =============================================================================
# À placer dans /usr/local/bin/ ou ~/scripts/
# Cron recommandé : 0 2 * * * /usr/local/bin/gitea-backup.sh
#
# Ce script sauvegarde :
#   1. La base de données MySQL (dump SQL complet)
#   2. Les volumes Docker (data, mysql)
#   3. Le fichier docker-compose.yml et la config
#   4. Génère un script restore.sh autonome
#
# Paramètres configurables : voir gitea-scripts.conf
# =============================================================================

set -euo pipefail

# ─── Charger la configuration commune ─────────────────────────────────────────
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
CONFIG_FILE="${CONFIG_FILE:-$SCRIPT_DIR/gitea-scripts.conf}"

if [[ -f "$CONFIG_FILE" ]]; then
    # shellcheck source=/dev/null
    source "$CONFIG_FILE"
fi

# ─── Configuration locale (après chargement conf, permet surcharge env) ──────
BACKUP_DIR="${BACKUP_DIR:-/NFS/BACKUP/DOCKER/dev-prod/gitea}"
COMPOSE_DIR="${COMPOSE_DIR:-$HOME/dev/git/outils/docker/gitea}"
COMPOSE_FILE="${COMPOSE_FILE:-docker-compose.yml}"

# Conteneurs
DB_CONTAINER="${DB_CONTAINER:-gitea_db}"
APP_CONTAINER="${APP_CONTAINER:-gitea_server}"
DB_SERVICE="${DB_SERVICE:-gitea_db}"
APP_SERVICE="${APP_SERVICE:-gitea_server}"

# Base de données
DB_NAME="${DB_NAME:-gitea}"
DB_USER="${DB_USER:-gitea}"
DB_PASSWORD="${DB_PASSWORD:-chab30}"
DB_ROOT_PASSWORD="${DB_ROOT_PASSWORD:-gitea}"

# Volumes Docker (chemins HÔTE, pas conteneur)
VOLUME_DATA="${VOLUME_DATA:-/DOCKER_CONFIG/gitea/data}"
VOLUME_MYSQL="${VOLUME_MYSQL:-/DOCKER_CONFIG/gitea/mysql}"

# Rétention
RETENTION_DAYS="${RETENTION_DAYS:-30}"
RETENTION_WEEKLY="${RETENTION_WEEKLY:-4}"
RETENTION_MONTHLY="${RETENTION_MONTHLY:-6}"

# Options
COMPRESS="${COMPRESS:-true}"
VERIFY_BACKUP="${VERIFY_BACKUP:-true}"
STOP_CONTAINERS="${STOP_CONTAINERS:-false}"
ENABLE_NOTIFICATIONS="${ENABLE_NOTIFICATIONS:-false}"

# Log
LOG_FILE="${LOG_FILE:-/var/log/gitea-backup.log}"
LOG_DIR="$(dirname "$LOG_FILE")"

# Lock file
LOCK_DIR="${LOCK_DIR:-/tmp}"
LOCK_FILE="${LOCK_DIR}/gitea-backup.lock"

# Backup distant
REMOTE_BACKUP_ENABLED="${REMOTE_BACKUP_ENABLED:-false}"
REMOTE_BACKUP_METHOD="${REMOTE_BACKUP_METHOD:-rsync}"
REMOTE_BACKUP_HOST="${REMOTE_BACKUP_HOST:-}"
REMOTE_BACKUP_USER="${REMOTE_BACKUP_USER:-}"
REMOTE_BACKUP_PATH="${REMOTE_BACKUP_PATH:-}"
REMOTE_BACKUP_SSH_KEY="${REMOTE_BACKUP_SSH_KEY:-$HOME/.ssh/id_rsa}"

# Notifications
NOTIFY_METHOD="${NOTIFY_METHOD:-log}"
TELEGRAM_BOT_TOKEN="${TELEGRAM_BOT_TOKEN:-}"
TELEGRAM_CHAT_ID="${TELEGRAM_CHAT_ID:-}"
NTPY_TOPIC="${NTPY_TOPIC:-}"

# ─── Prérequis : s'assurer que le dossier de log existe ──────────────────────
mkdir -p "$LOG_DIR" 2>/dev/null || true

# ─── Logging ─────────────────────────────────────────────────────────────────
log() {
    local msg="[$(date '+%Y-%m-%d %H:%M:%S')] $1"
    echo "$msg"
    echo "$msg" >> "$LOG_FILE" 2>/dev/null || true
}

# ─── Notification ────────────────────────────────────────────────────────────
notify() {
    local msg="$1"
    case "$NOTIFY_METHOD" in
        telegram)
            if [[ -n "$TELEGRAM_BOT_TOKEN" ]] && [[ -n "$TELEGRAM_CHAT_ID" ]]; then
                curl -s -X POST "https://api.telegram.org/bot${TELEGRAM_BOT_TOKEN}/sendMessage" \
                    -d "chat_id=$TELEGRAM_CHAT_ID" -d "text=$msg" > /dev/null 2>&1 || true
            fi
            ;;
        ntfy)
            if [[ -n "$NTPY_TOPIC" ]]; then
                curl -s -H "Title: Gitea Backup" -d "$msg" "https://ntfy.sh/$NTPY_TOPIC" > /dev/null 2>&1 || true
            fi
            ;;
    esac
}

# ─── Lock file ───────────────────────────────────────────────────────────────
acquire_lock() {
    if [[ -f "$LOCK_FILE" ]]; then
        local pid
        pid=$(cat "$LOCK_FILE" 2>/dev/null || echo "")
        if [[ -n "$pid" ]] && kill -0 "$pid" 2>/dev/null; then
            log "⚠️  Une autre instance (PID $pid) est déjà en cours d'exécution — arrêt"
            exit 0
        fi
        log "⚠️  Lock stale détecté (PID $pid n'existe plus), on continue"
        rm -f "$LOCK_FILE"
    fi
    echo $$ > "$LOCK_FILE"
}

release_lock() {
    rm -f "$LOCK_FILE"
}

cleanup() {
    release_lock
}
trap cleanup EXIT

# ─── Détection docker compose ────────────────────────────────────────────────
detect_compose() {
    if docker compose version &>/dev/null; then
        echo "docker compose"
    elif command -v docker-compose &>/dev/null; then
        echo "docker-compose"
    else
        echo ""
    fi
}

# ─── Vérification espace disque (robuste) ────────────────────────────────────
check_disk_space() {
    local path="$1"
    local min_kb="${2:-2097152}"  # 2 GB par défaut
    local available_kb

    # Méthode robuste : utiliser df -P (format POSIX, pas de wrapping)
    available_kb=$(df -P "$path" 2>/dev/null | tail -1 | awk '{print $4}')
    if [[ -z "$available_kb" || "$available_kb" -le 0 ]]; then
        # Fallback avec --output (GNU df)
        available_kb=$(df --output=avail "$path" 2>/dev/null | tail -1 | tr -d ' ' || echo "0")
    fi

    if [[ "$available_kb" -lt "$min_kb" ]]; then
        return 1
    fi
    echo "$available_kb"
    return 0
}

# ─── Backup distant ──────────────────────────────────────────────────────────
sync_remote() {
    local backup_path="$1"
    if [[ "$REMOTE_BACKUP_ENABLED" != "true" ]]; then
        return 0
    fi
    if [[ -z "$REMOTE_BACKUP_HOST" ]] || [[ -z "$REMOTE_BACKUP_USER" ]] || [[ -z "$REMOTE_BACKUP_PATH" ]]; then
        log "⚠️  Backup distant : configuration incomplète, ignoré"
        return 0
    fi

    log "☁️  Synchronisation distante ($REMOTE_BACKUP_METHOD) vers ${REMOTE_BACKUP_USER}@${REMOTE_BACKUP_HOST}:${REMOTE_BACKUP_PATH}..."

    local ssh_opts="-o StrictHostKeyChecking=no -o ConnectTimeout=10"
    if [[ -f "$REMOTE_BACKUP_SSH_KEY" ]]; then
        ssh_opts="$ssh_opts -i $REMOTE_BACKUP_SSH_KEY"
    fi

    case "$REMOTE_BACKUP_METHOD" in
        rsync)
            if command -v rsync &>/dev/null; then
                rsync -avz -e "ssh $ssh_opts" \
                    "$backup_path" \
                    "${REMOTE_BACKUP_USER}@${REMOTE_BACKUP_HOST}:${REMOTE_BACKUP_PATH}/" 2>&1 || {
                    log "⚠️  Échec rsync distant"
                    return 1
                }
                log "   ✅ Synchronisation rsync réussie"
            else
                log "⚠️  rsync non installé, backup distant ignoré"
                return 1
            fi
            ;;
        scp)
            scp $ssh_opts -r "$backup_path" \
                "${REMOTE_BACKUP_USER}@${REMOTE_BACKUP_HOST}:${REMOTE_BACKUP_PATH}/" 2>&1 || {
                log "⚠️  Échec SCP distant"
                return 1
            }
            log "   ✅ Synchronisation SCP réussie"
            ;;
        *)
            log "⚠️  Méthode de backup distant inconnue : $REMOTE_BACKUP_METHOD"
            return 1
            ;;
    esac
    return 0
}

# ═════════════════════════════════════════════════════════════════════════════
# MAIN
# ═════════════════════════════════════════════════════════════════════════════

acquire_lock

TIMESTAMP=$(date +%Y%m%d-%H%M%S)
DATE_LABEL=$(date +%Y-%m-%d)
DAY_OF_WEEK=$(date +%u)   # 1=lundi, 7=dimanche
DAY_OF_MONTH=$(date +%d)

BACKUP_NAME="gitea-backup-${TIMESTAMP}"
BACKUP_PATH="${BACKUP_DIR}/${BACKUP_NAME}"
RESTORE_SCRIPT="${BACKUP_PATH}/restore.sh"

DOCKER_COMPOSE=$(detect_compose)

log "════════════════════════════════════════════════════════"
log "📦 Début backup Gitea → $BACKUP_PATH"

# ─── Pré-vérifications ──────────────────────────────────────────────────────
mkdir -p "$BACKUP_DIR" || { log "❌ Impossible de créer $BACKUP_DIR"; exit 1; }
cd "$COMPOSE_DIR" || { log "❌ Répertoire $COMPOSE_DIR introuvable"; exit 1; }

if [[ -z "$DOCKER_COMPOSE" ]]; then
    log "❌ Ni 'docker compose' ni 'docker-compose' n'est disponible"
    exit 1
fi

mkdir -p "$BACKUP_PATH"

# Vérifier espace disque (minimum 2 GB)
AVAILABLE_KB=$(check_disk_space "$BACKUP_DIR" 2097152) || {
    log "❌ Espace disque insuffisant (moins de 2 GB disponibles sur $BACKUP_DIR)"
    exit 1
}
log "💾 Espace disque : $((AVAILABLE_KB / 1024)) MB disponibles"

# ─── Optionnel : arrêter les conteneurs pour un backup consistant ───────────
CONTAINERS_WERE_STOPPED=false
if [[ "$STOP_CONTAINERS" == "true" ]]; then
    log "⏸️  Arrêt temporaire des conteneurs..."
    $DOCKER_COMPOSE -f "$COMPOSE_FILE" stop 2>&1 | tee -a "$LOG_FILE" || true
    CONTAINERS_WERE_STOPPED=true
fi

# ─── 1. Backup base de données MySQL ────────────────────────────────────────
log "🛢️  Dump base de données MySQL ($DB_NAME)..."

if docker ps --format '{{.Names}}' | grep -q "^${DB_CONTAINER}$"; then
    docker exec "$DB_CONTAINER" mysqldump \
        -u root -p"$DB_ROOT_PASSWORD" \
        --single-transaction \
        --routines \
        --triggers \
        --events \
        --hex-blob \
        --default-character-set=utf8mb4 \
        "$DB_NAME" > "${BACKUP_PATH}/gitea-db.sql" 2>"${BACKUP_PATH}/mysqldump.err" || {
            log "❌ Échec du dump MySQL"
            cat "${BACKUP_PATH}/mysqldump.err" >> "$LOG_FILE" 2>/dev/null || true
            [[ "$CONTAINERS_WERE_STOPPED" == "true" ]] && $DOCKER_COMPOSE -f "$COMPOSE_FILE" start 2>&1 | tee -a "$LOG_FILE" || true
            exit 1
        }
    rm -f "${BACKUP_PATH}/mysqldump.err"
    DB_SIZE=$(wc -c < "${BACKUP_PATH}/gitea-db.sql" 2>/dev/null || echo "0")
    log "   ✅ Dump MySQL OK (${DB_SIZE} bytes)"
else
    log "❌ Conteneur $DB_CONTAINER non trouvé (pas en cours d'exécution)"
    [[ "$CONTAINERS_WERE_STOPPED" == "true" ]] && $DOCKER_COMPOSE -f "$COMPOSE_FILE" start 2>&1 | tee -a "$LOG_FILE" || true
    exit 1
fi

# Compresser le dump si demandé
if [[ "$COMPRESS" == "true" ]]; then
    gzip -f "${BACKUP_PATH}/gitea-db.sql"
    log "   📦 Compressé : $(ls -lh "${BACKUP_PATH}/gitea-db.sql.gz" 2>/dev/null | awk '{print $5}')"
fi

# ─── 2. Backup volumes Docker ───────────────────────────────────────────────
log "📁 Backup volume data ($VOLUME_DATA)..."

tar -czf "${BACKUP_PATH}/gitea-data.tar.gz" \
    -C "$(dirname "$VOLUME_DATA")" \
    --exclude='*.log' \
    --exclude='log/*' \
    --exclude='tmp/*' \
    --exclude='cache/*' \
    "$(basename "$VOLUME_DATA")" 2>&1 || {
        log "❌ Échec tar du volume data"
        [[ "$CONTAINERS_WERE_STOPPED" == "true" ]] && $DOCKER_COMPOSE -f "$COMPOSE_FILE" start 2>&1 | tee -a "$LOG_FILE" || true
        exit 1
    }
DATA_SIZE=$(ls -lh "${BACKUP_PATH}/gitea-data.tar.gz" 2>/dev/null | awk '{print $5}')
log "   ✅ Volume data sauvegardé ($DATA_SIZE)"

log "📁 Backup volume MySQL ($VOLUME_MYSQL)..."
tar -czf "${BACKUP_PATH}/gitea-mysql.tar.gz" \
    -C "$(dirname "$VOLUME_MYSQL")" \
    "$(basename "$VOLUME_MYSQL")" 2>&1 || {
        log "❌ Échec tar du volume MySQL"
        [[ "$CONTAINERS_WERE_STOPPED" == "true" ]] && $DOCKER_COMPOSE -f "$COMPOSE_FILE" start 2>&1 | tee -a "$LOG_FILE" || true
        exit 1
    }
MYSQL_SIZE=$(ls -lh "${BACKUP_PATH}/gitea-mysql.tar.gz" 2>/dev/null | awk '{print $5}')
log "   ✅ Volume MySQL sauvegardé ($MYSQL_SIZE)"

# ─── 3. Sauvegarde docker-compose + config ──────────────────────────────────
log "📋 Sauvegarde docker-compose et configuration..."
cp "$COMPOSE_DIR/$COMPOSE_FILE" "${BACKUP_PATH}/docker-compose.yml"

# Sauvegarder aussi le app.ini si présent
if [[ -f "${VOLUME_DATA}/gitea/conf/app.ini" ]]; then
    cp "${VOLUME_DATA}/gitea/conf/app.ini" "${BACKUP_PATH}/app.ini"
    log "   ✅ app.ini sauvegardé"
else
    log "   ⚠️  app.ini non trouvé dans ${VOLUME_DATA}/gitea/conf/"
fi

# ─── Redémarrer les conteneurs si on les avait arrêtés ──────────────────────
if [[ "$CONTAINERS_WERE_STOPPED" == "true" ]]; then
    log "▶️  Redémarrage des conteneurs..."
    $DOCKER_COMPOSE -f "$COMPOSE_FILE" start 2>&1 | tee -a "$LOG_FILE" || true

    # Attendre que Gitea réponde
    for i in $(seq 1 30); do
        if curl -s -o /dev/null -w "%{http_code}" "http://localhost:3000" 2>/dev/null | grep -qE "200|302|303"; then
            log "✅ Gitea répond après ${i}s"
            break
        fi
        sleep 1
    done
fi

# ─── 4. Générer le script de restore ────────────────────────────────────────
log "📝 Génération du script de restore..."

DB_DUMP_FILE="gitea-db.sql"
[[ "$COMPRESS" == "true" ]] && DB_DUMP_FILE="gitea-db.sql.gz"

cat > "$RESTORE_SCRIPT" << RESTORE_EOF
#!/bin/bash
# =============================================================================
# RESTORE SCRIPT — Gitea Backup $TIMESTAMP
# Généré le $(date)
# =============================================================================
# Usage : bash restore.sh [OPTIONS]
#
# Options :
#   --dry-run    Affiche ce qui serait fait sans exécuter
#   --force      Ne pas demander confirmation
#   --help       Cette aide
# =============================================================================

set -euo pipefail

# ─── Configuration cible ────────────────────────────────────────────────────
TARGET_COMPOSE_DIR="\${TARGET_COMPOSE_DIR:-\$HOME/dev/git/outils/docker/gitea}"
TARGET_VOLUME_DATA="\${TARGET_VOLUME_DATA:-/DOCKER_CONFIG/gitea/data}"
TARGET_VOLUME_MYSQL="\${TARGET_VOLUME_MYSQL:-/DOCKER_CONFIG/gitea/mysql}"
DB_ROOT_PASSWORD="\${DB_ROOT_PASSWORD:-gitea}"
DB_NAME="\${DB_NAME:-gitea}"
DB_USER="\${DB_USER:-gitea}"
DB_PASSWORD="\${DB_PASSWORD:-chab30}"

DRY_RUN=false
FORCE=false

for arg in "\$@"; do
    case "\$arg" in
        --dry-run) DRY_RUN=true ;;
        --force)   FORCE=true ;;
        --help|-h) head -50 "\$0"; exit 0 ;;
    esac
done

SCRIPT_DIR="\$(cd "\$(dirname "\$0")" && pwd)"
BACKUP_DIR="\$SCRIPT_DIR"

echo "════════════════════════════════════════════════════════"
echo "🔄 RESTAURATION GITEA"
echo "   Source     : \$BACKUP_DIR"
echo "   Date       : $TIMESTAMP"
echo "   Cible      : \$TARGET_COMPOSE_DIR"
echo "════════════════════════════════════════════════════════"

if [[ "\$DRY_RUN" == "true" ]]; then
    echo ""
    echo "🔍 DRY RUN — aucune action ne sera effectuée"
    echo ""
    echo "Actions qui seraient exécutées :"
    echo "  1. mkdir -p \$TARGET_VOLUME_DATA \$TARGET_VOLUME_MYSQL"
    echo "  2. Extraire gitea-mysql.tar.gz  → \$TARGET_VOLUME_MYSQL"
    echo "  3. Extraire gitea-data.tar.gz   → \$TARGET_VOLUME_DATA"
    echo "  4. Copier docker-compose.yml    → \$TARGET_COMPOSE_DIR/"
    echo "  5. docker compose up -d"
    echo "  6. Attendre MySQL prêt"
    echo "  7. docker exec gitea_db mysql ... < $DB_DUMP_FILE"
    echo "  8. docker compose restart"
    echo ""
    exit 0
fi

if [[ "\$FORCE" != "true" ]]; then
    echo ""
    echo "⚠️  ATTENTION : Ceci va ÉCRASER les données Gitea existantes !"
    echo "   Toute donnée non sauvegardée sera PERDUE."
    echo ""
    read -p "Confirmer la restauration ? (taper 'RESTORE' en majuscules) : " CONFIRM
    if [[ "\$CONFIRM" != "RESTORE" ]]; then
        echo "❌ Restauration annulée."
        exit 0
    fi
fi

echo ""
echo "📦 Étape 1/6 : Création des répertoires..."
mkdir -p "\$TARGET_VOLUME_DATA" "\$TARGET_VOLUME_MYSQL" "\$TARGET_COMPOSE_DIR"

echo "📦 Étape 2/6 : Restauration volume MySQL..."
rm -rf "\${TARGET_VOLUME_MYSQL:?}"/*
tar -xzf "\$BACKUP_DIR/gitea-mysql.tar.gz" -C "\$(dirname "\$TARGET_VOLUME_MYSQL")"

echo "📦 Étape 3/6 : Restauration volume Gitea..."
rm -rf "\${TARGET_VOLUME_DATA:?}"/*
tar -xzf "\$BACKUP_DIR/gitea-data.tar.gz" -C "\$(dirname "\$TARGET_VOLUME_DATA")"

echo "📦 Étape 4/6 : Copie docker-compose..."
cp "\$BACKUP_DIR/docker-compose.yml" "\$TARGET_COMPOSE_DIR/"

# Restaurer app.ini si présent
if [[ -f "\$BACKUP_DIR/app.ini" ]]; then
    mkdir -p "\${TARGET_VOLUME_DATA}/gitea/conf"
    cp "\$BACKUP_DIR/app.ini" "\${TARGET_VOLUME_DATA}/gitea/conf/app.ini"
    echo "   ✅ app.ini restauré"
fi

# Détecter docker compose ou docker-compose
if docker compose version &>/dev/null; then
    DC="docker compose"
elif command -v docker-compose &>/dev/null; then
    DC="docker-compose"
else
    echo "❌ Ni 'docker compose' ni 'docker-compose' n'est disponible"
    exit 1
fi

echo "📦 Étape 5/6 : Démarrage des conteneurs..."
cd "\$TARGET_COMPOSE_DIR"
\$DC up -d

echo "   ⏳ Attente démarrage MySQL (30s)..."
sleep 10
MYSQL_READY=false
for i in \$(seq 1 20); do
    if docker exec gitea_db mysqladmin ping -u root -p"\$DB_ROOT_PASSWORD" --silent 2>/dev/null; then
        echo "   ✅ MySQL prêt après \$((10 + i))s"
        MYSQL_READY=true
        break
    fi
    sleep 1
done

if [[ "\$MYSQL_READY" != "true" ]]; then
    echo "⚠️  MySQL n'a pas répondu dans le temps imparti, tentative de restore DB quand même..."
fi

echo "📦 Étape 6/6 : Restauration base de données..."
DB_DUMP="\$BACKUP_DIR/$DB_DUMP_FILE"
if [[ -f "\${DB_DUMP}.gz" ]]; then
    gunzip -c "\${DB_DUMP}.gz" | docker exec -i gitea_db mysql -u root -p"\$DB_ROOT_PASSWORD" "\$DB_NAME"
elif [[ -f "\$DB_DUMP" ]]; then
    docker exec -i gitea_db mysql -u root -p"\$DB_ROOT_PASSWORD" "\$DB_NAME" < "\$DB_DUMP"
else
    echo "❌ Fichier dump introuvable : \$DB_DUMP"
    exit 1
fi

echo ""
echo "🔄 Redémarrage final des conteneurs..."
\$DC restart

echo ""
echo "════════════════════════════════════════════════════════"
echo "✅ RESTAURATION TERMINÉE !"
echo ""
echo "   Gitea : http://localhost:3000"
echo "   Vérifiez les logs : \$DC logs -f"
echo "════════════════════════════════════════════════════════"
RESTORE_EOF

chmod +x "$RESTORE_SCRIPT"
log "   ✅ Script restore créé : restore.sh"

# ─── 5. Vérification intégrité ──────────────────────────────────────────────
if [[ "$VERIFY_BACKUP" == "true" ]]; then
    log "🔍 Vérification intégrité des archives..."
    ERRORS=0

    # Vérifier chaque archive .tar.gz (avec gestion du glob vide)
    shopt -s nullglob
    for ARCHIVE in "$BACKUP_PATH"/*.tar.gz; do
        if ! tar -tzf "$ARCHIVE" > /dev/null 2>&1; then
            log "   ❌ Archive corrompue : $(basename "$ARCHIVE")"
            ERRORS=$((ERRORS + 1))
        fi
    done
    shopt -u nullglob

    if [[ "$COMPRESS" == "true" ]]; then
        if ! gunzip -t "${BACKUP_PATH}/gitea-db.sql.gz" 2>/dev/null; then
            log "   ❌ Dump SQL corrompu"
            ERRORS=$((ERRORS + 1))
        fi
    fi

    if [[ $ERRORS -gt 0 ]]; then
        log "❌ $ERRORS erreur(s) d'intégrité détectée(s)"
        exit 1
    fi
    log "   ✅ Toutes les archives sont valides"
fi

# ─── 6. Métadonnées du backup ───────────────────────────────────────────────
GITEA_VERSION="inconnue"
if docker ps --format '{{.Names}}' | grep -q "^${APP_CONTAINER}$"; then
    GITEA_VERSION=$(docker exec "$APP_CONTAINER" gitea --version 2>/dev/null || echo "inconnue")
fi

DB_DISPLAY_SIZE=$(ls -lh "${BACKUP_PATH}"/gitea-db.sql* 2>/dev/null | awk '{print $5}' | head -1)

cat > "${BACKUP_PATH}/backup-info.txt" << INFO
Date           : $(date)
Hôte           : $(hostname)
Gitea version  : $GITEA_VERSION
DB type        : MySQL 8
DB name        : $DB_NAME
Compression    : $COMPRESS
Containers stopped : $CONTAINERS_WERE_STOPPED
Taille DB      : ${DB_DISPLAY_SIZE:-N/A}
Taille data    : ${DATA_SIZE:-N/A}
Taille mysql   : ${MYSQL_SIZE:-N/A}
INFO

# ─── 7. Nettoyage des vieux backups ─────────────────────────────────────────
log "🧹 Nettoyage backups (rétention: ${RETENTION_DAYS}j, ${RETENTION_WEEKLY} hebdo, ${RETENTION_MONTHLY} mensuels)..."

# Pour chaque backup, déterminer s'il doit être gardé
find "$BACKUP_DIR" -maxdepth 1 -type d -name "gitea-backup-*" -printf '%f\n' 2>/dev/null | sort -r | while read -r backup_name; do
    backup_path="$BACKUP_DIR/$backup_name"

    # Déterminer le jour du mois et le jour de la semaine à partir du nom
    # Format: gitea-backup-YYYYMMDD-HHMMSS
    local_date=$(echo "$backup_name" | grep -oE '[0-9]{8}' | head -1)
    if [[ -z "$local_date" ]]; then
        continue
    fi

    local_day=${local_date:6:2}   # Jour du mois (DD)
    local_month=${local_date:4:2}
    local_year=${local_date:0:4}

    # Déterminer le jour de la semaine (1=lundi, 7=dimanche)
    local_dow=$(date -d "${local_year}-${local_month}-${local_day}" +%u 2>/dev/null || echo "0")

    # Âge en jours
    backup_ts=$(date -d "${local_year}-${local_month}-${local_day}" +%s 2>/dev/null || echo "0")
    now_ts=$(date +%s)
    age_days=$(( (now_ts - backup_ts) / 86400 ))

    # Décisions de rétention
    KEEP=false
    REASON=""

    # Toujours garder : backups récents
    if [[ "$age_days" -le "$RETENTION_DAYS" ]]; then
        KEEP=true
        REASON="récent (${age_days}j <= ${RETENTION_DAYS}j)"
    fi

    # Toujours garder : backups du dimanche (hebdomadaire) dans la limite RETENTION_WEEKLY
    if [[ "$local_dow" == "7" ]]; then
        # Compter combien de backups du dimanche on garde déjà
        weekly_count=$(find "$BACKUP_DIR" -maxdepth 1 -type d -name "gitea-backup-*" -printf '%f\n' 2>/dev/null | grep -oE '^gitea-backup-[0-9]{8}' | while read -r wb; do
            wb_date=$(echo "$wb" | grep -oE '[0-9]{8}')
            wb_dow=$(date -d "${wb_date:0:4}-${wb_date:4:2}-${wb_date:6:2}" +%u 2>/dev/null || echo "0")
            if [[ "$wb_dow" == "7" ]]; then
                echo "$wb"
            fi
        done | sort -r | head -n "$RETENTION_WEEKLY" | wc -l)

        # Si ce backup fait partie des N derniers dimanches, on garde
        weekly_list=$(find "$BACKUP_DIR" -maxdepth 1 -type d -name "gitea-backup-*" -printf '%f\n' 2>/dev/null | grep -oE '^gitea-backup-[0-9]{8}' | while read -r wb; do
            wb_date=$(echo "$wb" | grep -oE '[0-9]{8}')
            wb_dow=$(date -d "${wb_date:0:4}-${wb_date:4:2}-${wb_date:6:2}" +%u 2>/dev/null || echo "0")
            if [[ "$wb_dow" == "7" ]]; then
                echo "$wb"
            fi
        done | sort -r | head -n "$RETENTION_WEEKLY")

        if echo "$weekly_list" | grep -qF "$backup_name"; then
            KEEP=true
            REASON="hebdomadaire (dimanche, dans les ${RETENTION_WEEKLY} derniers)"
        fi
    fi

    # Toujours garder : backups du 1er du mois (mensuel) dans la limite RETENTION_MONTHLY
    if [[ "$local_day" == "01" ]]; then
        monthly_list=$(find "$BACKUP_DIR" -maxdepth 1 -type d -name "gitea-backup-*" -printf '%f\n' 2>/dev/null | grep -oE '^gitea-backup-[0-9]{8}' | while read -r mb; do
            mb_date=$(echo "$mb" | grep -oE '[0-9]{8}')
            mb_day=${mb_date:6:2}
            if [[ "$mb_day" == "01" ]]; then
                echo "$mb"
            fi
        done | sort -r | head -n "$RETENTION_MONTHLY")

        if echo "$monthly_list" | grep -qF "$backup_name"; then
            KEEP=true
            REASON="mensuel (1er du mois, dans les ${RETENTION_MONTHLY} derniers)"
        fi
    fi

    if [[ "$KEEP" == "true" ]]; then
        log "   💾 Gardé : $backup_name ($REASON)"
    else
        log "   🗑️  Suppression : $backup_name"
        rm -rf "$backup_path"
    fi
done

# ─── 8. Backup distant ──────────────────────────────────────────────────────
sync_remote "$BACKUP_PATH" || true

# ─── 9. Rapport final ───────────────────────────────────────────────────────
TOTAL_SIZE=$(du -sh "$BACKUP_PATH" 2>/dev/null | cut -f1)
BACKUP_COUNT=$(find "$BACKUP_DIR" -maxdepth 1 -type d -name "gitea-backup-*" 2>/dev/null | wc -l)

log "✅ Backup terminé !"
log "📊 Total      : ${TOTAL_SIZE:-N/A}"
log "📋 Backups conservés : $BACKUP_COUNT"
log "📂 Destination : $BACKUP_PATH"
log "═══ Fin ───────────────────────────────────────────"

echo ""
echo "📂 $BACKUP_PATH"
echo "   ├── gitea-db.sql.gz       ← Dump MySQL"
echo "   ├── gitea-data.tar.gz     ← Volume /data"
echo "   ├── gitea-mysql.tar.gz    ← Volume MySQL"
echo "   ├── docker-compose.yml    ← Stack Docker"
echo "   ├── app.ini               ← Configuration Gitea"
echo "   ├── restore.sh            ← Script de restore"
echo "   └── backup-info.txt       ← Métadonnées"

notify "✅ Backup Gitea terminé sur $(hostname) — $TOTAL_SIZE — $BACKUP_PATH"

exit 0