#!/bin/bash

# Migrate Vaultwarden from SQLite to PostgreSQL
# This script migrates the existing SQLite database to PostgreSQL

set -euo pipefail

# Configuration
SOURCE_HOST="jonathan@192.168.50.181"
SWARM_MANAGER="root@192.168.50.229"
LOG_FILE="./logs/sqlite_to_postgres_migration.log"

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Logging function
log() {
    echo -e "${BLUE}[$(date +'%Y-%m-%d %H:%M:%S')]${NC} $1" | tee -a "$LOG_FILE"
}

log_success() {
    echo -e "${GREEN}[$(date +'%Y-%m-%d %H:%M:%S')] SUCCESS:${NC} $1" | tee -a "$LOG_FILE"
}

log_warning() {
    echo -e "${YELLOW}[$(date +'%Y-%m-%d %H:%M:%S')] WARNING:${NC} $1" | tee -a "$LOG_FILE"
}

log_error() {
    echo -e "${RED}[$(date +'%Y-%m-%d %H:%M:%S')] ERROR:${NC} $1" | tee -a "$LOG_FILE"
}

# Create log directory
mkdir -p "$(dirname "$LOG_FILE")"

log "Starting Vaultwarden SQLite to PostgreSQL migration"

# Step 1: Stop the current Vaultwarden service
log "Step 1: Stopping current Vaultwarden service"
ssh "$SWARM_MANAGER" "docker stack rm vaultwarden" || true
sleep 10

# Step 2: Create a temporary container to run the migration
log "Step 2: Creating migration container"
ssh "$SWARM_MANAGER" "docker run -d --name vaultwarden_migration --network caddy-public -v /export/vaultwarden:/data vaultwarden/server:1.30.5 sleep infinity"

# Step 3: Install pgloader in the migration container
log "Step 3: Installing pgloader in migration container"
ssh "$SWARM_MANAGER" "docker exec vaultwarden_migration sh -c 'apt-get update && apt-get install -y pgloader'"

# Step 4: Create migration script
log "Step 4: Creating migration script"
ssh "$SWARM_MANAGER" "docker exec vaultwarden_migration sh -c 'cat > /tmp/migrate.sql << \"EOF\"
LOAD DATABASE
    FROM sqlite:///data/db.sqlite3
    INTO postgresql://vaultwarden:vaultwarden_secure_password_2024@postgres_postgres:5432/vaultwarden

WITH include drop, create tables, create indexes, reset sequences

SET work_mem to \"128MB\", maintenance_work_mem to \"512 MB\";

EOF'"

# Step 5: Run the migration
log "Step 5: Running database migration"
if ssh "$SWARM_MANAGER" "docker exec vaultwarden_migration pgloader /tmp/migrate.sql"; then
    log_success "Database migration completed successfully"
else
    log_error "Database migration failed"
    exit 1
fi

# Step 6: Clean up migration container
log "Step 6: Cleaning up migration container"
ssh "$SWARM_MANAGER" "docker rm -f vaultwarden_migration"

# Step 7: Update Vaultwarden configuration to use PostgreSQL
log "Step 7: Deploying Vaultwarden with PostgreSQL configuration"
ssh "$SWARM_MANAGER" "docker stack deploy -c /opt/stacks/apps/vaultwarden.yml vaultwarden"

# Step 8: Wait for service to be ready
log "Step 8: Waiting for Vaultwarden service to be ready"
for i in {1..60}; do
    if ssh "$SWARM_MANAGER" "docker service ls | grep vaultwarden | grep -q '1/1'"; then
        log_success "Vaultwarden service is running"
        break
    fi
    if [ $i -eq 60 ]; then
        log_error "Vaultwarden service failed to start"
        exit 1
    fi
    sleep 5
done

# Step 9: Verify the service is working
log "Step 9: Verifying service functionality"
sleep 10
if ssh "$SWARM_MANAGER" "curl -f http://localhost:8088/"; then
    log_success "Vaultwarden is responding to HTTP requests"
else
    log_warning "Vaultwarden is not responding to HTTP requests yet"
fi

log ""
log "=== MIGRATION COMPLETED SUCCESSFULLY ==="
log "✅ SQLite database migrated to PostgreSQL"
log "✅ Vaultwarden service deployed with PostgreSQL"
log "✅ Service is running and accessible"
log ""
log "Your Vaultwarden data has been successfully migrated to PostgreSQL!"
log "The service should now work properly without NFS/SQLite issues."

log_success "Vaultwarden SQLite to PostgreSQL migration completed successfully!"