# Copyright 2026 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

user nginx;
worker_processes auto;
worker_rlimit_nofile 65535;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 4096;
    multi_accept on;
    use epoll;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # High-performance event I/O settings
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    server_tokens off;

    # Client payload size (allows large artifact, image, APK uploads)
    client_max_body_size 100M;
    client_body_buffer_size 128k;

    # Enhanced JSON-structured access logging for easy parsing & cloud monitoring
    log_format artemis_json escape=json '{'
        '"time_local":"$time_local",'
        '"remote_addr":"$remote_addr",'
        '"request_method":"$request_method",'
        '"request_uri":"$request_uri",'
        '"status":$status,'
        '"body_bytes_sent":$body_bytes_sent,'
        '"request_time":$request_time,'
        '"upstream_response_time":"$upstream_response_time",'
        '"upstream_addr":"$upstream_addr",'
        '"upstream_status":"$upstream_status",'
        '"http_referrer":"$http_referer",'
        '"http_user_agent":"$http_user_agent"'
    '}';

    access_log /var/log/nginx/access.log artemis_json;

    # Global proxy defaults
    proxy_http_version 1.1;
    proxy_connect_timeout 10s;
    proxy_send_timeout 3600s;
    proxy_read_timeout 3600s;

    # Gzip compression for static assets and API payloads
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/x-javascript
        application/xml
        application/xml+rss
        image/svg+xml;

    # WebSocket Upgrade Header Mapping
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    # Load modular server configurations
    include /etc/nginx/conf.d/*.conf;
}