#!/bin/bash

# Inventory Management System Docker Build Script
# This script builds and deploys the complete inventory solution

set -e

echo "🚀 Building Inventory Management System..."

# Load environment variables from .env file
if [ -f .env ]; then
    echo "📝 Loading environment variables from .env..."
    export $(cat .env | grep -v '^#' | xargs)
else
    echo "❌ .env file not found. Please copy .env.example to .env and configure it."
    exit 1
fi

# Check if Docker is installed
if ! command -v docker &> /dev/null; then
    echo "❌ Docker is not installed. Please install Docker first."
    exit 1
fi

# Check if Docker Compose is installed
if ! command -v docker-compose &> /dev/null; then
    echo "❌ Docker Compose is not installed. Please install Docker Compose first."
    exit 1
fi

# Validate required environment variables
if [ -z "$DB_HOST" ] || [ "$DB_HOST" = "your-external-db-host" ]; then
    echo "❌ DB_HOST is not configured in .env. Please set your external database host."
    exit 1
fi

if [ -z "$DB_USER" ] || [ "$DB_USER" = "your-db-username" ]; then
    echo "❌ DB_USER is not configured in .env. Please set your database username."
    exit 1
fi

if [ -z "$DB_PASS" ] || [ "$DB_PASS" = "your-db-password" ]; then
    echo "❌ DB_PASS is not configured in .env. Please set your database password."
    exit 1
fi

# Create uploads directory if it doesn't exist
if [ ! -d uploads ]; then
    echo "📁 Creating uploads directory..."
    mkdir -p uploads
    chmod 755 uploads
fi

# Display configuration summary
echo "📋 Configuration Summary:"
echo "   🌐 Frontend Port: ${FRONTEND_PORT:-80}"
echo "   🗄️  Database Host: $DB_HOST"
echo "   🗄️  Database Port: ${DB_PORT:-3306}"
echo "   🗄️  Database Name: ${DB_NAME:-inventory_db}"
echo "   🗄️  Database User: $DB_USER"
echo "   🔴 Redis Port: ${REDIS_PORT:-6379}"
echo ""

# Test environment variables and database connectivity
echo "🔍 Testing environment variables and database connectivity..."
if ! docker-compose run --rm inventory-app php test-env.php; then
    echo "❌ Environment variables or database connection test failed."
    echo "💡 Make sure:"
    echo "   - Environment variables are properly set in .env"
    echo "   - Database server is running and accessible"
    echo "   - Database '$DB_NAME' exists"
    echo "   - User '$DB_USER' has proper permissions"
    echo "   - Network allows connection from Docker container"
    echo ""
    echo "🔍 Debug: Check container logs for detailed error information"
    docker-compose logs inventory-app | tail -20
    exit 1
fi

# Build and start the application
echo "🔨 Building Docker containers..."
docker-compose build

echo "🚀 Starting application..."
docker-compose up -d

# Wait a moment for services to start
echo "⏳ Waiting for services to start..."
sleep 10

# Check if containers are running
echo "🔍 Checking container status..."
docker-compose ps

# Show logs
echo "📋 Showing application logs..."
docker-compose logs inventory-app

echo "✅ Build complete!"
echo ""
echo "🌐 Application is available at: http://localhost:${FRONTEND_PORT:-80}"
echo "🔧 API endpoints are available at: http://localhost:${FRONTEND_PORT:-80}/api"
echo "🗄️  Connected to database: $DB_HOST:${DB_PORT:-3306}/$DB_NAME"
echo ""
echo "📝 Management Commands:"
echo "   � Stop application: docker-compose down"
echo "   � View logs: docker-compose logs -f"
echo "   � Rebuild: docker-compose build --no-cache"
echo "   🐚 Access container: docker-compose exec inventory-app bash"