# ==========================================
# CoopCredits Nginx Configuration
# Production - coop.hobokenchicken.com
# ==========================================

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Logging format
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for" '
                    'rt=$request_time uct="$upstream_connect_time" '
                    'uht="$upstream_header_time" urt="$upstream_response_time"';

    access_log /var/log/nginx/access.log main;

    # Performance
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 50M;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript 
               application/rss+xml application/atom+xml image/svg+xml;

    # Rate limiting zones
    limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=webhooks:10m rate=100r/s;
    limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;
    limit_conn_zone $binary_remote_addr zone=addr:10m;

    # Upstream servers
    upstream frontend {
        server frontend:3000 max_fails=3 fail_timeout=30s;
    }

    upstream backend {
        server backend:3001 max_fails=3 fail_timeout=30s;
    }

    # ==========================================
    # HTTP Server - Redirect to HTTPS
    # ==========================================
    server {
        listen 80;
        server_name coop.hobokenchicken.com;
        
        # Let's Encrypt challenge
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }
        
        # Redirect all HTTP to HTTPS
        location / {
            return 301 https://$server_name$request_uri;
        }
    }

    # ==========================================
    # HTTPS Server - Main Application
    # ==========================================
    server {
        listen 443 ssl http2;
        server_name coop.hobokenchicken.com;

        # SSL Certificates
        ssl_certificate /etc/nginx/ssl/cert.pem;
        ssl_certificate_key /etc/nginx/ssl/key.pem;
        
        # Alternative: Let's Encrypt certificates
        # ssl_certificate /etc/letsencrypt/live/coop.hobokenchicken.com/fullchain.pem;
        # ssl_certificate_key /etc/letsencrypt/live/coop.hobokenchicken.com/privkey.pem;

        # SSL Configuration
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers off;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;
        ssl_session_tickets off;

        # Security Headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self'; connect-src 'self' https://api.devnet.solana.com wss:;" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;

        # ==========================================
        # Frontend - Next.js App
        # ==========================================
        location / {
            proxy_pass http://frontend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            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_cache_bypass $http_upgrade;
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # ==========================================
        # API Endpoints
        # ==========================================
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            limit_conn addr 10;
            
            proxy_pass http://backend/api/;
            proxy_http_version 1.1;
            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_connect_timeout 30s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # ==========================================
        # Webhooks (higher rate limit)
        # ==========================================
        location /webhooks/ {
            limit_req zone=webhooks burst=50 nodelay;
            
            proxy_pass http://backend/webhooks/;
            proxy_http_version 1.1;
            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_connect_timeout 30s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # ==========================================
        # WebSocket Support (Socket.io)
        # ==========================================
        location /socket.io/ {
            proxy_pass http://backend/socket.io/;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            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_connect_timeout 7d;
            proxy_send_timeout 7d;
            proxy_read_timeout 7d;
        }

        # ==========================================
        # Static Assets (cache optimization)
        # ==========================================
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            proxy_pass http://frontend;
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # ==========================================
        # Health Check Endpoint
        # ==========================================
        location /health {
            proxy_pass http://backend/health;
            access_log off;
        }

        # ==========================================
        # Error Pages
        # ==========================================
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root /usr/share/nginx/html;
            internal;
        }
    }
}