events {
    worker_connections 1024;
}

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

    # Logging
    access_log /var/log/nginx/access.log;
    error_log  /var/log/nginx/error.log warn;

    # Basic settings
    sendfile        on;
    keepalive_timeout 65;
    client_max_body_size 20M;

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # Upstream backend
    upstream etsy_api {
        server etsy-finance-tracker:8080;
    }

    server {
        listen 80;
        server_name localhost;
        root /usr/share/nginx/html;
        index index.html;

        # Health check endpoint (proxied to backend)
        location /health {
            proxy_pass http://etsy_api;
            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;
        }

        # API routes - proxy to backend
        location /api/ {
            proxy_pass http://etsy_api;
            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;
        }

        # Static assets with caching
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # React app - serve index.html for all routes (SPA support)
        location / {
            try_files $uri $uri/ /index.html;
            
            # Prevent caching of index.html
            location = /index.html {
                add_header Cache-Control "no-cache, no-store, must-revalidate";
                add_header Pragma "no-cache";
                add_header Expires "0";
            }
        }

        # Error pages
        error_page 404 /index.html;
        error_page 500 502 503 504 /50x.html;
        
        location = /50x.html {
            root /usr/share/nginx/html;
        }
    }
}