#!/bin/bash

# Configuration
BACKUP_DIR="/volume1/backups/nas-tools"
DATE=$(date +%Y%m%d_%H%M%S)
RETENTION_DAYS=7

# Ensure backup directory exists
mkdir -p "$BACKUP_DIR"

log() {
    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1"
}

log "Starting backup..."

# 1. Database Dumps
log "Dumping databases..."

# Gitea DB
docker exec gitea-db pg_dump -U gitea gitea > "$BACKUP_DIR/gitea_db_$DATE.sql"
if [ $? -eq 0 ]; then
    log "Gitea DB dumped successfully."
else
    log "Error dumping Gitea DB!"
fi

# Immich DB
docker exec immich-db pg_dump -U postgres immich > "$BACKUP_DIR/immich_db_$DATE.sql"
if [ $? -eq 0 ]; then
    log "Immich DB dumped successfully."
else
    log "Error dumping Immich DB!"
fi

# 2. File Backups (Configs & Data)
# Exclude heavy media files if handled separately, but for now backing up key configs
log "Compressing configuration files..."

# Dashboard & Gitea & Immich configs
# Assuming /volume1/docker structure
tar -czf "$BACKUP_DIR/configs_$DATE.tar.gz" \
    -C /volume1/docker \
    nas-dashboard/backend/config.py \
    nas-dashboard/.env \
    gitea/conf \
    immich/.env \
    --exclude='gitea/data' \
    --exclude='immich/upload' \
    --exclude='immich/thumbs'

if [ $? -eq 0 ]; then
    log "Configs compressed successfully."
else
    log "Error compressing configs!"
fi

# 3. Cleanup Old Backups
log "Cleaning up backups older than $RETENTION_DAYS days..."
find "$BACKUP_DIR" -type f -name "*_db_*.sql" -mtime +$RETENTION_DAYS -delete
find "$BACKUP_DIR" -type f -name "configs_*.tar.gz" -mtime +$RETENTION_DAYS -delete

log "Backup completed."