#!/bin/bash
SCRIPT_ABS_LOCATION=$(realpath "$(dirname "${0}")")

source $SCRIPT_ABS_LOCATION/immich-backup.env
source $SCRIPT_ABS_LOCATION/../logger.sh

# Container Names 
APP_CONTAINER="immich_server"          
DB_CONTAINER="immich_postgres"          
BACKUP_CONTAINER="duplicati"   

# Database Settings
DB_USER="postgres"

SOURCE_DIR="/mnt/data/immich"
BACKUP_DESTINATION="$BACKUP_DESTINATION"
BACKUP_ENCR_PASSPHRASE="$BACKUP_ENCR_PASSPHRASE"

# Cloud Storage Authentication
SFTP_USERNAME="$SFTP_USERNAME"
SFTP_PASSWORD="$SFTP_PASSWORD"
SFTP_FINGERPRINT="$SFTP_FINGERPRINT"

# Log file
LOG_FILE="$SCRIPT_ABS_LOCATION/immich-backup.log"

# Dump Database          
log "Dumping immich postgresql database..."
DB_TMP_BAK_NAME="postgres_$(date +"%Y%m%d").bak"
docker exec -t $DB_CONTAINER pg_dumpall \
  --clean \
  --if-exists \
  --username=postgres \
  --file=/var/lib/postgresql/data/$DB_TMP_BAK_NAME || { log "Error: Failed to dump the immich database."; exit 1; }

# Backup all files to target destination
log "Backing up immich files and database..."
docker exec $BACKUP_CONTAINER duplicati-cli backup ssh://$BACKUP_DESTINATION \
  $SOURCE_DIR/data/library \
  $SOURCE_DIR/data/upload \
  $SOURCE_DIR/data/profile \
  $SOURCE_DIR/postgres/$DB_TMP_BAK_NAME \
  --backup-name="immich backup" \
  --keep-versions=7 \
  --auth-username=$SFTP_USERNAME \
  --auth-password=$SFTP_PASSWORD \
  --passphrase="$BACKUP_ENCR_PASSPHRASE" \
  --ssh-fingerprint="$SFTP_FINGERPRINT" \
  --prefix="immich" || { log "Error: Failed to backup immich files and database."; exit 1; }

# Delete temporary backup files
log "Deleting temporary backup files..."
docker exec $DB_CONTAINER rm /var/lib/postgresql/data/$DB_TMP_BAK_NAME || { log "Error: Failed to delete temporary backup files."; exit 1; }

log "immich backup completed successfully."