# AITBC Services Nginx Configuration
# Copy to nginx-aitbc.conf and replace YOUR_DOMAIN with your actual domain
# Adjust BACKEND_IP if running in containers (default: 127.0.0.1 for localhost)
# For Incus containers, set BACKEND_IP to the container IP address
# You can use sed to replace: sed 's/127.0.0.1/YOUR_CONTAINER_IP/g' nginx-aitbc.conf.example > nginx-aitbc.conf
#
# After deployment, run: certbot --nginx -d YOUR_DOMAIN to enable SSL

# Backend IP address - set to container IP if running in Incus/LXD
map $host $backend_ip {
    default 127.0.0.1;
    # Uncomment and set your container IP below:
    # host.example.com 10.0.0.100;
}

server {
    listen 80;
    server_name YOUR_DOMAIN;

    # Security Headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;

    # Enable gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/javascript application/xml+rss application/json;

    # Coordinator API
    location /api/ {
        proxy_pass http://$backend_ip:8000/v1/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_buffering off;

        # CORS headers for API
        add_header Access-Control-Allow-Origin "*" always;
        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Api-Key" always;

        # Handle preflight requests
        if ($request_method = 'OPTIONS') {
            add_header Access-Control-Allow-Origin "*";
            add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
            add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,X-Api-Key";
            add_header Access-Control-Max-Age 1728000;
            add_header Content-Type "text/plain; charset=utf-8";
            add_header Content-Length 0;
            return 204;
        }
    }

    # Blockchain RPC
    location /rpc/ {
        proxy_pass http://$backend_ip:8006/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_buffering off;
    }

    # Marketplace UI
    location /Marketplace {
        proxy_pass http://$backend_ip:8007/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        rewrite ^/Marketplace/(.*)$ /$1 break;
        proxy_buffering off;
    }

    # Trade Exchange
    location /Exchange {
        proxy_pass http://$backend_ip:8008/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        rewrite ^/Exchange/(.*)$ /$1 break;
        proxy_buffering off;
    }

    # Exchange API Routes
    location /api/trades/ {
        proxy_pass http://$backend_ip:8008/api/trades/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_buffering off;
    }

    location /api/orders {
        proxy_pass http://$backend_ip:8008/api/orders;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_buffering off;
    }

    # Wallet API
    location /wallet/ {
        proxy_pass http://$backend_ip:8003/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    # Health check
    location /health {
        proxy_pass http://$backend_ip:8000/v1/health;
        proxy_set_header Host $host;
    }

    # Default — serve static website
    location / {
        root /var/www/html;
        index index.html;
        try_files $uri $uri/ =404;

        # WebSocket support if needed
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # Deny access to hidden files
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    # Custom error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;

    location = /50x.html {
        root /usr/share/nginx/html;
    }

    # Static file caching
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Serve production assets
    location /assets/ {
        alias /var/www/html/assets/;
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options nosniff;
    }

    # Font serving
    location /fonts-font-awesome/ {
        alias /usr/share/fonts-font-awesome/;
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Admin endpoints
    location = /api/treasury-balance {
        proxy_pass http://$backend_ip:8085;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }

    location = /api/exchange/wallet/info {
        proxy_pass http://$backend_ip:8085;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}