#!/bin/bash

# Pre-deployment validation script
# Run this before every deployment to catch issues early

set -e

echo "🔍 Running pre-deployment checks..."

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

# Function to print status
print_status() {
    if [ $1 -eq 0 ]; then
        echo -e "${GREEN}✅ $2${NC}"
    else
        echo -e "${RED}❌ $2${NC}"
        exit 1
    fi
}

print_warning() {
    echo -e "${YELLOW}⚠️  $1${NC}"
}

# Check 1: Verify Tailwind CSS is built
echo "📦 Checking Tailwind CSS files..."
if [ -f "theme/static/css/dist/styles.css" ]; then
    print_status 0 "Tailwind CSS files exist"
else
    print_status 1 "Tailwind CSS not built. Run: cd theme/static_src && npm run build"
fi

# Check 2: Test collectstatic
echo "📁 Testing static file collection..."
if python manage.py collectstatic --noinput --dry-run > /dev/null 2>&1; then
    print_status 0 "Static files collection test passed"
else
    print_status 1 "Static files collection failed. Check STATIC_ROOT and STATICFILES_DIRS"
fi

# Check 3: Check for pending migrations
echo "🗄️  Checking for pending migrations..."
if python manage.py showmigrations --plan | grep -q "\[ \]"; then
    print_status 1 "Pending migrations found. Run: python manage.py makemigrations"
else
    print_status 0 "No pending migrations"
fi

# Check 4: Validate Django configuration
echo "⚙️  Validating Django settings..."
if python manage.py check > /dev/null 2>&1; then
    print_status 0 "Django configuration valid"
else
    print_status 1 "Django configuration issues found. Run: python manage.py check"
fi

# Check 5: Test Docker build
echo "🐳 Testing Docker build..."
if docker build --target production -t django-deploy-test . > /dev/null 2>&1; then
    print_status 0 "Docker build successful"
    docker rmi django-deploy-test > /dev/null 2>&1 || true
else
    print_status 1 "Docker build failed. Check Dockerfile"
fi

# Check 6: Verify startup script
echo "🚀 Checking startup script..."
if [ -x "startup.sh" ]; then
    print_status 0 "Startup script is executable"
else
    print_status 1 "Startup script not executable. Run: chmod +x startup.sh"
fi

# Check 7: Validate environment variables
echo "🔐 Checking environment configuration..."
if [ -f ".env.example" ]; then
    print_status 0 "Environment example file exists"
else
    print_warning "No .env.example file found. Consider creating one"
fi

# Check 8: Verify required files
required_files=("manage.py" "requirements/production.txt" "docker-compose.dokploy-simple.yml")
for file in "${required_files[@]}"; do
    if [ -f "$file" ]; then
        print_status 0 "Required file exists: $file"
    else
        print_status 1 "Missing required file: $file"
    fi
done

echo ""
echo -e "${GREEN}🎉 All pre-deployment checks passed!${NC}"
echo -e "${GREEN}✅ Ready for deployment!${NC}"
echo ""
echo "Next steps:"
echo "1. git add . && git commit -m 'Ready for deployment' && git push"
echo "2. Deploy in Dokploy"
echo "3. Test endpoints after deployment"