#!/bin/bash

# =============================================================================
# СОЗДАНИЕ NGINX КОНФИГУРАЦИИ ДЛЯ MY UPLOADER BOT
# =============================================================================

if [ $# -lt 2 ]; then
    echo "Usage: $0 <domain> <project_dir>"
    exit 1
fi

DOMAIN="$1"
PROJECT_DIR="$2"
NGINX_CONFIG="/etc/nginx/sites-available/my-uploader-bot"

echo "Создание Nginx конфигурации для $DOMAIN..."

cat > "$NGINX_CONFIG" << EOF
# =============================================================================
# MY UPLOADER BOT - NGINX CONFIGURATION
# =============================================================================
# Domain: $DOMAIN
# Generated: $(date)
# =============================================================================

# Rate limiting zones
limit_req_zone \$binary_remote_addr zone=api_limit:10m rate=10r/s;
limit_req_zone \$binary_remote_addr zone=upload_limit:10m rate=2r/s;
limit_req_zone \$binary_remote_addr zone=general_limit:10m rate=20r/s;

# Upstream для основного приложения
upstream my_uploader_app {
    server 127.0.0.1:15100 max_fails=3 fail_timeout=30s;
    keepalive 32;
}

# Upstream для web2-client
upstream web2_client {
    server 127.0.0.1:3000 max_fails=3 fail_timeout=30s;
    keepalive 16;
}

# Upstream для converter-module
upstream converter_module {
    server 127.0.0.1:8080 max_fails=3 fail_timeout=30s;
    keepalive 16;
}

# Redirect HTTP to HTTPS
server {
    listen 80;
    listen [::]:80;
    server_name $DOMAIN www.$DOMAIN;

    # ACME challenge для Let's Encrypt
    location /.well-known/acme-challenge/ {
        root /var/www/html;
        try_files \$uri =404;
    }

    # Redirect всех остальных запросов на HTTPS
    location / {
        return 301 https://\$server_name\$request_uri;
    }
}

# HTTPS Main Server
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name $DOMAIN www.$DOMAIN;

    # SSL Configuration
    ssl_certificate /etc/letsencrypt/live/$DOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/$DOMAIN/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/$DOMAIN/chain.pem;

    # SSL Settings
    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_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_stapling on;
    ssl_stapling_verify on;

    # 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' https://cdn.jsdelivr.net https://unpkg.com; style-src 'self' 'unsafe-inline' https://cdn.jsdelivr.net https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com https://cdn.jsdelivr.net; img-src 'self' data: https: blob:; connect-src 'self' https: wss: ws:; media-src 'self' https: blob:; object-src 'none'; base-uri 'self'; form-action 'self';" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;

    # Basic Settings
    client_max_body_size 100M;
    client_body_timeout 60s;
    client_header_timeout 60s;
    keepalive_timeout 65s;
    send_timeout 60s;

    # Gzip Compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/xml+rss
        application/json
        application/ld+json
        image/svg+xml;

    # Logging
    access_log /var/log/nginx/my-uploader-bot.access.log;
    error_log /var/log/nginx/my-uploader-bot.error.log;

    # ==========================================================================
    # ОСНОВНЫЕ МАРШРУТЫ
    # ==========================================================================

    # API routes
    location /api/ {
        limit_req zone=api_limit burst=20 nodelay;
        
        proxy_pass http://my_uploader_app;
        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_set_header X-Forwarded-Host \$host;
        proxy_set_header X-Forwarded-Port \$server_port;
        
        proxy_cache_bypass \$http_upgrade;
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        
        # Специальные настройки для upload endpoints
        location /api/upload/ {
            limit_req zone=upload_limit burst=5 nodelay;
            client_max_body_size 500M;
            proxy_read_timeout 300s;
            proxy_send_timeout 300s;
            proxy_pass http://my_uploader_app;
        }
    }

    # Health check endpoint
    location /health {
        proxy_pass http://my_uploader_app;
        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;
        
        access_log off;
    }

    # Telegram webhook endpoint
    location /webhook/ {
        limit_req zone=api_limit burst=50 nodelay;
        
        proxy_pass http://my_uploader_app;
        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;
    }

    # Static files for main app
    location /static/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files \$uri @app_static;
    }

    location @app_static {
        proxy_pass http://my_uploader_app;
        proxy_http_version 1.1;
        proxy_set_header Host \$host;
        proxy_cache_valid 200 1d;
    }

    # ==========================================================================
    # WEB2-CLIENT (фронтенд интерфейс)
    # ==========================================================================

    location /upload/ {
        limit_req zone=general_limit burst=10 nodelay;
        
        proxy_pass http://web2_client/;
        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;
    }

    location /client/ {
        limit_req zone=general_limit burst=10 nodelay;
        
        proxy_pass http://web2_client/;
        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;
    }

    # ==========================================================================
    # CONVERTER-MODULE (конвертер медиа)
    # ==========================================================================

    location /convert/ {
        limit_req zone=upload_limit burst=3 nodelay;
        client_max_body_size 500M;
        
        proxy_pass http://converter_module/;
        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 300s;
        proxy_send_timeout 300s;
        proxy_read_timeout 300s;
    }

    # ==========================================================================
    # ОСНОВНОЙ МАРШРУТ (главная страница)
    # ==========================================================================

    location / {
        limit_req zone=general_limit burst=20 nodelay;
        
        proxy_pass http://my_uploader_app;
        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_set_header X-Forwarded-Host \$host;
        proxy_set_header X-Forwarded-Port \$server_port;
        proxy_cache_bypass \$http_upgrade;
    }

    # ==========================================================================
    # СПЕЦИАЛЬНЫЕ ФАЙЛЫ
    # ==========================================================================

    # robots.txt
    location = /robots.txt {
        return 200 "User-agent: *\nDisallow: /api/\nDisallow: /webhook/\nAllow: /\n";
        add_header Content-Type text/plain;
    }

    # favicon.ico
    location = /favicon.ico {
        proxy_pass http://my_uploader_app;
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
    }

    # Защита от доступа к скрытым файлам
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    # Защита от доступа к конфигурационным файлам
    location ~* \.(env|conf|config|ini|log|bak|backup|tmp)$ {
        deny all;
        access_log off;
        log_not_found off;
    }
}

# =============================================================================
# ДОПОЛНИТЕЛЬНАЯ БЕЗОПАСНОСТЬ
# =============================================================================

# Блокировка ботов и сканеров
map \$http_user_agent \$blocked_agent {
    ~*malicious 1;
    ~*bot      0;
    ~*crawler  0;
    ~*spider   0;
    default    0;
}

# Блокировка IP по геолокации (опционально)
# geo \$blocked_country {
#     default 0;
#     CN 1;  # Китай
#     RU 0;  # Россия разрешена
# }
EOF

echo "✅ Nginx конфигурация создана: $NGINX_CONFIG"

# Создание директории для логов
mkdir -p /var/log/nginx

# Проверка синтаксиса
echo "Проверка синтаксиса Nginx..."
nginx -t -c /etc/nginx/nginx.conf

echo "✅ Nginx конфигурация готова для $DOMAIN"