#!/bin/sh

# Configure nginx.conf based on APP_SUBFOLDER environment variable
# This script generates the appropriate nginx configuration for SPA deployments

TEMPLATE_FILE="/tmp/nginx.conf.template"
OUTPUT_FILE="/etc/nginx/nginx.conf"

if [ -n "$APP_SUBFOLDER" ]; then
    echo "Configuring nginx for subfolder deployment: /$APP_SUBFOLDER/"
    
    # Generate location block for subfolder with proper static assets handling
    SUBFOLDER_CONFIG="        # Subfolder-specific configuration for /$APP_SUBFOLDER/
        location /$APP_SUBFOLDER/ {
            # Handle static assets in subfolder
            location ~* /$APP_SUBFOLDER/.*\.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|json)$ {
                expires 1y;
                add_header Cache-Control \"public, immutable\";
                try_files \$uri =404;
            }
            
            # SPA routing for subfolder
            try_files \$uri \$uri/ /$APP_SUBFOLDER/index.html;
        }"
    
    # Replace placeholder with subfolder configuration
    sed "s|        # SUBFOLDER_PLACEHOLDER|$SUBFOLDER_CONFIG|g" "$TEMPLATE_FILE" > "$OUTPUT_FILE"
else
    echo "Configuring nginx for root deployment"
    # Remove placeholder for root deployment
    sed "s|        # SUBFOLDER_PLACEHOLDER||g" "$TEMPLATE_FILE" > "$OUTPUT_FILE"
fi

echo "Nginx configuration generated successfully"