#!/bin/bash
# =============================================================================
# MOPC Platform - First-Time Deployment Script
# =============================================================================
# Usage: ./scripts/deploy.sh
# Run this once on the Linux VPS to set up the platform.
# The Docker image is built by Gitea CI and pulled from the registry.

set -e

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
DOCKER_DIR="$PROJECT_DIR/docker"

echo "============================================"
echo "  MOPC Platform - Deployment"
echo "============================================"
echo ""

# 1. Check Docker is available
if ! command -v docker &> /dev/null; then
    echo "ERROR: Docker is not installed."
    exit 1
fi

if ! docker compose version &> /dev/null; then
    echo "ERROR: Docker Compose v2 is not available."
    exit 1
fi

# 2. Check environment file
if [ ! -f "$DOCKER_DIR/.env" ]; then
    echo "No .env file found in docker/."
    echo "Copying template..."
    cp "$DOCKER_DIR/.env.production" "$DOCKER_DIR/.env"
    echo ""
    echo "IMPORTANT: Edit docker/.env with your production values before continuing."
    echo "  nano $DOCKER_DIR/.env"
    echo ""
    exit 1
fi

# 3. Load registry URL from env
source "$DOCKER_DIR/.env"
if [ -z "$REGISTRY_URL" ] || [ "$REGISTRY_URL" = "CHANGE_ME" ]; then
    echo "ERROR: REGISTRY_URL is not set in docker/.env"
    echo "Set it to your Gitea registry URL (e.g. gitea.example.com/your-org)"
    exit 1
fi

# 4. Log in to container registry
echo "==> Logging in to container registry ($REGISTRY_URL)..."
docker login "$REGISTRY_URL"

# 5. Create data directories
echo "==> Creating data directories..."
sudo mkdir -p /data/mopc/postgres
sudo chown -R 1000:1000 /data/mopc

# 6. Pull and start
echo "==> Pulling latest images..."
cd "$DOCKER_DIR"
docker compose pull app

echo "==> Starting services..."
docker compose up -d

# 7. Wait for health check
echo "==> Waiting for application to start..."
MAX_WAIT=120
WAITED=0
while [ $WAITED -lt $MAX_WAIT ]; do
    if curl -sf http://localhost:7600/api/health > /dev/null 2>&1; then
        echo ""
        echo "============================================"
        echo "  Application is running!"
        echo "============================================"
        echo ""
        echo "  URL:     http://localhost:7600"
        echo "  Health:  http://localhost:7600/api/health"
        echo ""
        echo "  NEXT STEPS:"
        echo "  1. Run the one-time database seed:"
        echo "     ./scripts/seed.sh"
        echo ""
        echo "  2. Set up Nginx reverse proxy:"
        echo "     sudo ln -s $DOCKER_DIR/nginx/mopc-platform.conf /etc/nginx/sites-enabled/"
        echo "     sudo nginx -t && sudo systemctl reload nginx"
        echo ""
        echo "  3. Set up SSL:"
        echo "     sudo certbot --nginx -d portal.monaco-opc.com"
        echo ""
        exit 0
    fi
    sleep 2
    WAITED=$((WAITED + 2))
    printf "."
done

echo ""
echo "WARNING: Application did not become healthy within ${MAX_WAIT}s."
echo "Check logs: cd $DOCKER_DIR && docker compose logs -f app"
exit 1