#!/bin/bash
# =============================================================================
# LetsBe Backup Script
# =============================================================================
# Backs up Docker volumes and databases to configured rclone remote
# Configure rclone first: rclone config
# =============================================================================

set -euo pipefail

BACKUP_DIR="/tmp/letsbe-backups"
DATE=$(date +%Y%m%d_%H%M%S)
RCLONE_REMOTE="remote"  # Configure this in rclone config

# Create backup directory
mkdir -p "$BACKUP_DIR"

echo "=== LetsBe Backup - $DATE ==="

# Function to backup a postgres database
backup_postgres() {
    local container=$1
    local db_name=$2
    local db_user=${3:-postgres}

    if docker ps --format '{{.Names}}' | grep -q "^${container}$"; then
        echo "Backing up PostgreSQL: $container ($db_name)..."
        docker exec "$container" pg_dump -U "$db_user" "$db_name" | gzip > "$BACKUP_DIR/${container}_${DATE}.sql.gz"
    fi
}

# Function to backup a mysql database
backup_mysql() {
    local container=$1
    local db_name=$2
    local db_user=${3:-root}
    local db_pass=$4

    if docker ps --format '{{.Names}}' | grep -q "^${container}$"; then
        echo "Backing up MySQL: $container ($db_name)..."
        docker exec "$container" mysqldump -u"$db_user" -p"$db_pass" "$db_name" | gzip > "$BACKUP_DIR/${container}_${DATE}.sql.gz"
    fi
}

# Function to backup docker volumes
backup_volume() {
    local volume=$1

    if docker volume ls --format '{{.Name}}' | grep -q "^${volume}$"; then
        echo "Backing up volume: $volume..."
        docker run --rm -v "${volume}:/data" -v "$BACKUP_DIR:/backup" alpine tar czf "/backup/${volume}_${DATE}.tar.gz" -C /data .
    fi
}

# =============================================================================
# BACKUP DATABASES
# =============================================================================

# Chatwoot
backup_postgres "*-chatwoot-postgres" "chatwoot_production" "chatwoot" 2>/dev/null || true

# NoCoDB
backup_postgres "*-nocodb-postgres" "nocodb" "postgres" 2>/dev/null || true

# Baserow
backup_postgres "*-baserow-db" "baserow" "baserow" 2>/dev/null || true

# n8n
backup_postgres "*-n8n-postgres" "n8n" "n8n" 2>/dev/null || true

# Nextcloud
backup_postgres "*-nextcloud-postgres" "nextcloud" "nextcloud" 2>/dev/null || true

# Typebot
backup_postgres "*-typebot-db" "typebot" "postgres" 2>/dev/null || true

# =============================================================================
# BACKUP VOLUMES (important data)
# =============================================================================

# Get all letsbe-related volumes
for vol in $(docker volume ls --format '{{.Name}}' | grep -E '(storage|data|uploads)'); do
    backup_volume "$vol" 2>/dev/null || true
done

# =============================================================================
# UPLOAD TO REMOTE
# =============================================================================

if command -v rclone &> /dev/null; then
    if rclone listremotes | grep -q "^${RCLONE_REMOTE}:"; then
        echo "Uploading backups to $RCLONE_REMOTE..."
        rclone copy "$BACKUP_DIR" "${RCLONE_REMOTE}:letsbe-backups/${DATE}/" --progress
        echo "Upload complete."
    else
        echo "WARNING: rclone remote '$RCLONE_REMOTE' not configured. Backups stored locally only."
    fi
else
    echo "WARNING: rclone not installed. Backups stored locally only."
fi

# =============================================================================
# CLEANUP OLD LOCAL BACKUPS (keep last 7 days)
# =============================================================================

find "$BACKUP_DIR" -type f -mtime +7 -delete 2>/dev/null || true

echo "=== Backup Complete ==="
echo "Local backups: $BACKUP_DIR"