# Nginx Configuration for Weather Chatbot
# ========================================
#
# Author: RSK World (https://rskworld.in)
# Year: 2026
#
# Description: Nginx reverse proxy configuration for production deployment

upstream weather_chatbot {
    server web:5000;
}

server {
    listen 80;
    server_name your-domain.com www.your-domain.com;

    # Redirect HTTP to HTTPS
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name your-domain.com www.your-domain.com;

    # SSL Configuration
    ssl_certificate /etc/nginx/ssl/cert.pem;
    ssl_certificate_key /etc/nginx/ssl/key.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers 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 Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

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

    # Client Body Size
    client_max_body_size 10M;

    # Timeouts
    proxy_connect_timeout 60s;
    proxy_send_timeout 60s;
    proxy_read_timeout 60s;

    # Static Files
    location /static {
        alias /app/static;
        expires 30d;
        add_header Cache-Control "public, immutable";
    }

    # Media Files
    location /media {
        alias /app/static/uploads;
        expires 7d;
        add_header Cache-Control "public";
    }

    # API and Application
    location / {
        proxy_pass http://weather_chatbot;
        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 $server_name;
        proxy_redirect off;
    }

    # Health Check
    location /health {
        proxy_pass http://weather_chatbot/health;
        access_log off;
    }

    # Logging
    access_log /var/log/nginx/weather_chatbot_access.log;
    error_log /var/log/nginx/weather_chatbot_error.log;
}