# Docker Nginx конфигурация для mc.exbytestudios.com
# Внутренний nginx в Docker контейнере
# Принимает HTTP от внешнего nginx, проксирует в сервисы

# WebSocket upgrade mapping
map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

# Upstream definitions (using Docker service names)
upstream remote_access_api {
    server remote_access_api:8000;
    keepalive 32;
}

upstream guacamole_web {
    server guacamole:8080;
    keepalive 32;
}

# Main server block - слушает на порту 8443 для внешнего nginx
server {
    listen 8443;
    server_name _;  # Принимаем любой Host от внешнего nginx
    
    # Logging (внутренние логи Docker)
    access_log /var/log/nginx/docker.access.log;
    error_log /var/log/nginx/docker.error.log;
    
    # General settings
    client_max_body_size 10M;
    client_body_timeout 60s;
    client_header_timeout 60s;
    keepalive_timeout 65s;
    
    # Root location - redirect to API docs
    location = / {
        return 302 /api/docs;
    }
    
    # =========================================================================
    # API Endpoints - Все бизнес-эндпоинты с префиксом /api/
    # =========================================================================
    # FastAPI endpoints: /api/auth/*, /api/connections, /api/machines/*, 
    #                    /api/bulk/*, /api/security/*
    # CORS headers добавляются в Gateway nginx для избежания дубликатов
    location /api/ {
        proxy_pass http://remote_access_api;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # Передача Content-Type и Content-Length для POST/PUT
        proxy_set_header Content-Type $content_type;
        proxy_set_header Content-Length $content_length;
        
        # Timeouts
        proxy_connect_timeout 30s;
        proxy_send_timeout 120s;
        proxy_read_timeout 120s;
        
        # Buffering для POST body
        proxy_buffering off;
        proxy_request_buffering off;
        client_max_body_size 10M;
        
        # Cache control
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
        add_header Expires "0" always;
    }
    
    # ✅ WebSocket Notifications - специальная обработка для WebSocket
    # КРИТИЧНО: Длинные таймауты и отключение буферизации для WebSocket
    location /ws/ {
        proxy_pass http://remote_access_api;
        proxy_http_version 1.1;
        
        # ✅ WebSocket upgrade headers
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        
        # Standard proxy headers
        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_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        
        # ✅ КРИТИЧНО: Длинные таймауты для WebSocket (до 2 часов)
        proxy_connect_timeout 60s;
        proxy_send_timeout 7200s;
        proxy_read_timeout 7200s;
        
        # ✅ КРИТИЧНО: Отключаем буферизацию для WebSocket
        proxy_buffering off;
        proxy_request_buffering off;
        
        # Cache control
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
    }
    
    
    # Guacamole Web Application
    location /guacamole/ {
        proxy_pass http://guacamole_web/guacamole/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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;
        
        # WebSocket support for Guacamole
        proxy_read_timeout 7200s;
        proxy_send_timeout 7200s;
        
        # Buffer settings for WebSocket
        proxy_buffering off;
        proxy_request_buffering off;
        
        # Allow iframe embedding for Guacamole client (desktop/electron apps)
        proxy_hide_header X-Frame-Options;
        proxy_hide_header Content-Security-Policy;
        
        # Cache control
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
    }
    
    # Guacamole WebSocket tunnel
    location /guacamole/websocket-tunnel {
        proxy_pass http://guacamole_web/guacamole/websocket-tunnel;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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;
        
        # WebSocket specific settings
        proxy_read_timeout 7200s;
        proxy_send_timeout 7200s;
        proxy_buffering off;
        proxy_request_buffering off;
        
        # Allow iframe embedding and WebSocket in iframe
        proxy_hide_header X-Frame-Options;
        proxy_hide_header Content-Security-Policy;
    }
    
    # Guacamole static assets
    location ~ ^/guacamole/(.*\.(js|css|json|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot))$ {
        proxy_pass http://guacamole_web/guacamole/$1;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        
        # Cache static assets for 1 hour
        add_header Cache-Control "public, max-age=3600";
        expires 1h;
    }
    
    # Custom error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    
    location = /404.html {
        return 404 '{"error": "Not Found", "message": "The requested resource was not found"}';
        add_header Content-Type application/json always;
    }
    
    location = /50x.html {
        return 500 '{"error": "Internal Server Error", "message": "Please try again later"}';
        add_header Content-Type application/json always;
    }
}