# Local Docker usage should work over plain HTTP on the mapped port.
server {
    listen 80;
    listen [::]:80;
    server_name _;

    # Docker embedded DNS — defer resolving "backend" until request time (avoids
    # startup race: nginx loads config before the backend container is registered).
    resolver 127.0.0.11 ipv6=off valid=10s;

    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript image/svg+xml;
    gzip_min_length 256;

    # SPA client-side routing: serve index.html for all non-file routes
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy REST API to backend
    location /api/ {
        set $backend_host backend;
        proxy_pass http://$backend_host:8080;
        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 WebSocket to backend
    location /ws {
        set $backend_host backend;
        proxy_pass http://$backend_host:8080;
        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_read_timeout 86400;
    }

    # Cache static assets aggressively
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Security headers
    add_header Content-Security-Policy "frame-ancestors 'self' https://web.telegram.org https://*.telegram.org;" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name _;

    ssl_certificate /etc/nginx/ssl/fullchain.pem;
    ssl_certificate_key /etc/nginx/ssl/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;

    resolver 127.0.0.11 ipv6=off valid=10s;

    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript image/svg+xml;
    gzip_min_length 256;

    # SPA client-side routing: serve index.html for all non-file routes
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Proxy REST API to backend
    location /api/ {
        set $backend_host backend;
        proxy_pass http://$backend_host:8080;
        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 WebSocket to backend
    location /ws {
        set $backend_host backend;
        proxy_pass http://$backend_host:8080;
        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_read_timeout 86400;
    }

    # Cache static assets aggressively
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Security headers
    add_header Content-Security-Policy "frame-ancestors 'self' https://web.telegram.org https://*.telegram.org;" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
}