user nginx;
worker_processes auto;

error_log /var/log/nginx/error.log notice;
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
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    access_log /var/log/nginx/access.log main;

    # Basic Settings
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 50M;
    server_tokens off;

    # Gzip Settings
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 1000;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    # Rate Limiting
    limit_req_zone $binary_remote_addr zone=api:10m rate=30r/s;
    limit_req_zone $binary_remote_addr zone=auth:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=ws:10m rate=5r/s;

    # Upstream Backend
    upstream backend {
        server backend:8000;
        keepalive 32;
    }

    # Upstream Frontend
    upstream frontend {
        server frontend:80;
        keepalive 32;
    }

    # Production HTTPS Server
    server {
        listen 443 ssl;
        http2 on;
        server_name test.byte-mate.xyz;

        # SSL Configuration
        ssl_certificate /etc/letsencrypt/live/test.byte-mate.xyz/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/test.byte-mate.xyz/privkey.pem;

        # Modern SSL configuration
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384;
        ssl_prefer_server_ciphers off;
        ssl_session_timeout 10m;
        ssl_session_cache shared:SSL:10m;
        ssl_session_tickets off;

        # Security Headers - ИСПРАВЛЕНО для CSP с портами
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "no-referrer-when-downgrade" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.tailwindcss.com; style-src 'self' 'unsafe-inline' https://cdn.tailwindcss.com; connect-src 'self' https: ws: wss:; media-src 'self' blob:; img-src 'self' data: blob:;" always;

        # WebSocket support for video calls
        location /ws/ {
            limit_req zone=ws burst=10 nodelay;

            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            # ВАЖНЫЕ заголовки для предотвращения редиректов
            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 https;
            proxy_set_header X-Forwarded-Host $server_name;
            proxy_set_header X-Forwarded-Port 443;

            # WebSocket specific timeouts
            proxy_read_timeout 86400s;
            proxy_send_timeout 86400s;
            proxy_connect_timeout 60s;

            # Disable buffering for WebSocket
            proxy_buffering off;
        }

        # Static Files (Django)
        location /static/ {
            alias /staticfiles/;
            expires 1y;
            add_header Cache-Control "public, immutable";
            add_header Access-Control-Allow-Origin *;

            try_files $uri $uri/ =404;
            access_log off;

            # Compression for static files
            location ~* \.(js|css)$ {
                gzip_static on;
                expires 1y;
                add_header Cache-Control "public, immutable";
            }

            # Font files
            location ~* \.(woff|woff2|ttf|eot)$ {
                expires 1y;
                add_header Cache-Control "public, immutable";
                add_header Access-Control-Allow-Origin *;
            }

            # Images
            location ~* \.(jpg|jpeg|png|gif|ico|svg)$ {
                expires 1M;
                add_header Cache-Control "public";
            }
        }

        # Media Files (Django)
        location /media/ {
            alias /app/media/;
            expires 1M;
            add_header Cache-Control "public";
            add_header Access-Control-Allow-Origin *;

            try_files $uri $uri/ =404;
        }

        # API Routes
        location /api/ {
            limit_req zone=api burst=50 nodelay;

            proxy_pass http://backend;

            # ВАЖНЫЕ заголовки для предотвращения редиректов
            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 https;
            proxy_set_header X-Forwarded-Host $server_name;
            proxy_set_header X-Forwarded-Port 443;

            # API specific timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;

            # Buffering
            proxy_buffering on;
            proxy_buffer_size 128k;
            proxy_buffers 4 256k;
            proxy_busy_buffers_size 256k;
        }

        # Admin Routes - ВАЖНО для исправления редиректов
        location /admin/ {
            limit_req zone=auth burst=5 nodelay;

            proxy_pass http://backend;

            # КРИТИЧЕСКИ ВАЖНЫЕ заголовки для админки
            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 https;
            proxy_set_header X-Forwarded-Host $server_name;
            proxy_set_header X-Forwarded-Port 443;

            # Отключаем редиректы от nginx
            proxy_redirect off;

            proxy_buffer_size 128k;
            proxy_buffers 4 256k;
            proxy_busy_buffers_size 256k;
        }

        # Frontend Application (Vue.js SPA)
        location / {
            proxy_pass http://frontend;

            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 https;
            proxy_set_header X-Forwarded-Host $server_name;
            proxy_set_header X-Forwarded-Port 443;

            # Handle SPA routing
            proxy_intercept_errors on;
            error_page 404 = @fallback;
        }

        # SPA Fallback
        location @fallback {
            proxy_pass http://frontend;
            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 https;
        }

        # Health Check
        location /health/ {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # Robots.txt
        location /robots.txt {
            alias /staticfiles/robots.txt;
            try_files $uri =404;
        }

        # Favicon
        location /favicon.ico {
            alias /staticfiles/favicon.ico;
            try_files $uri =404;
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
    }

    # HTTP to HTTPS redirect
    server {
        listen 80;
        server_name test.byte-mate.xyz;

        # Allow Let's Encrypt challenges
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        # Redirect all other traffic to HTTPS
        location / {
            return 301 https://$server_name$request_uri;
        }
    }

    # Блокировка запросов по IP и техническим доменам
    server {
        listen 80 default_server;
        listen 443 ssl default_server;
        server_name _;

        # Минимальная SSL конфигурация для блокировки HTTPS запросов
        ssl_certificate /etc/letsencrypt/live/test.byte-mate.xyz/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/test.byte-mate.xyz/privkey.pem;
        ssl_reject_handshake on;

        # Возвращаем 444 (connection closed without response) для всех запросов
        return 444;
    }
}