# =========================================================
# Request ID for correlation
# =========================================================
map $http_x_request_id $req_id {
    default $http_x_request_id;
    "" $request_id;
}

# =========================================================
# Rate limiting
# =========================================================
limit_req_zone $binary_remote_addr zone=api:10m rate=30r/m;
limit_req_zone $binary_remote_addr zone=uploads:10m rate=10r/m;

# =========================================================
# Upstream backend
# =========================================================
upstream backend {
    server 127.0.0.1:{{ backend_local_port }} max_fails=3 fail_timeout=30s;
    keepalive 32;
    keepalive_requests 100;
    keepalive_timeout 60s;
}

# =========================================================
# API Server
# =========================================================
server {
    listen {{ backend_port }};
    listen [::]:{{ backend_port }};
    server_name {{ ip }};
    client_max_body_size {{ nginx_max_body_size }};

    server_tokens off;

    # =========================================================
    # Security headers
    # =========================================================
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    proxy_hide_header X-Powered-By;
    proxy_hide_header Server;

    # =========================================================
    # API proxy
    # =========================================================
    location / {
        limit_req zone=api burst=20 nodelay;

        limit_except GET POST PUT PATCH DELETE OPTIONS { deny all; }

        proxy_pass http://backend;
        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_set_header X-Request-ID $req_id;
        proxy_set_header Connection "";

        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # =========================================================
    # Uploads
    # =========================================================
    location /uploads/ {
        alias {{ uploads_dir }}/;
        limit_req zone=uploads burst=20 nodelay;
        limit_except GET HEAD { deny all; }

        # Bloquer les fichiers exécutables
        location ~* \.(php|php5|phtml|sh|py|pl|cgi|exe|asp|aspx|jsp)$ {
            deny all;
        }

        expires 30d;
        add_header Cache-Control "public, immutable";
        add_header X-Content-Type-Options "nosniff" always;
    }

    location ^~ /uploads/images/ {
        alias {{ uploads_dir }}/images/;
        limit_req zone=uploads burst=20 nodelay;
        limit_except GET HEAD OPTIONS { deny all; }

        add_header Access-Control-Allow-Origin "*" always;
        add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS" always;
        add_header X-Content-Type-Options "nosniff" always;

        expires 30d;
        add_header Cache-Control "public, immutable" always;

        types {
            image/jpeg jpg jpeg;
            image/png png;
            image/gif gif;
            image/webp webp;
            image/svg+xml svg;
        }
        default_type image/jpeg;
    }

    location ^~ /uploads/videos/ {
        alias {{ uploads_dir }}/videos/;
        limit_req zone=uploads burst=20 nodelay;
        limit_except GET HEAD OPTIONS { deny all; }

        add_header Access-Control-Allow-Origin "*" always;
        add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS" always;
        add_header X-Content-Type-Options "nosniff" always;

        expires 30d;
        add_header Cache-Control "public, immutable" always;

        types {
            video/mp4 mp4;
            video/webm webm;
            video/ogg ogv;
        }
        default_type video/mp4;
    }

    # =========================================================
    # Deny hidden files and sensitive files
    # =========================================================
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    location ~* (\.env|\.git|package\.json|package-lock\.json|yarn\.lock|Dockerfile|docker-compose\.yml)$ {
        deny all;
        access_log off;
        log_not_found off;
    }
}