# Minimal nginx configuration for AppFlowy-Cloud
# Self Hosted AppFlowy Cloud user should alter this file to suit their needs

events {
    worker_connections 1024;
}

http {
    # docker dns resolver
    resolver 127.0.0.11 valid=10s;

    map $http_upgrade $connection_upgrade {
       default upgrade;
       ''      close;
    }

    server {
        listen 8080;

        # https://github.com/nginxinc/nginx-prometheus-exporter
        location = /stub_status {
            stub_status;
        }
    }


    server {
        ssl_certificate /etc/nginx/ssl/certificate.crt;
        ssl_certificate_key /etc/nginx/ssl/private_key.key;

        listen 80;
        listen 443 ssl;
        client_max_body_size 10M;

        underscores_in_headers on;
        set $appflowy_web_origin "http://localhost:3000";
        set $appflowy_cloud_backend "http://appflowy_cloud:8000";
        set $gotrue_backend "http://gotrue:9999";
        set $admin_frontend_backend "http://admin_frontend:3000";
        set $appflowy_ai_backend "http://ai:5001";
        set $minio_backend "http://minio:9001";
        set $portainer_backend "http://portainer:9000";
        set $pgadmin_backend "http://pgadmin:80";

        # GoTrue
        location /gotrue/ {
            proxy_pass $gotrue_backend;

            rewrite ^/gotrue(/.*)$ $1 break;

            # Allow headers like redirect_to to be handed over to the gotrue
            # for correct redirecting
            proxy_set_header Host $http_host;
            proxy_pass_request_headers on;
        }

        # WebSocket
        location /ws {
            proxy_pass $appflowy_cloud_backend;

            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "Upgrade";
            proxy_set_header Host $host;
            proxy_read_timeout 86400;
        }

        # AppFlowy-Cloud
        # created a separate location block for handling CORS preflight (OPTIONS) requests specifically for the /api endpoint.
        location = /api/options {
            if ($http_origin ~* ($appflowy_web_origin)) {
                add_header 'Access-Control-Allow-Origin' $http_origin;
            }
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT, DELETE, PATCH';
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, Accept, Client-Version';
            add_header 'Access-Control-Max-Age' 3600;
            add_header 'Content-Type' 'text/plain; charset=utf-8';
            add_header 'Content-Length' 0;
            return 204;
        }

        location /api/chat {
            proxy_pass $appflowy_cloud_backend;

            proxy_http_version 1.1;
            proxy_set_header Connection "";
            chunked_transfer_encoding on;
            proxy_buffering off;
            proxy_cache off;

            proxy_read_timeout 600s;
            proxy_connect_timeout 600s;
            proxy_send_timeout 600s;
        }

        location /api/import {
            proxy_pass $appflowy_cloud_backend;

            # Set headers
            proxy_set_header X-Request-Id $request_id;
            proxy_set_header Host $http_host;

            # Handle CORS
            if ($http_origin ~* ($appflowy_web_origin)) {
                add_header 'Access-Control-Allow-Origin' $http_origin always;
            }
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, PATCH, OPTIONS' always;
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, Accept' always;
            add_header 'Access-Control-Max-Age' 3600 always;

            # Timeouts
            proxy_read_timeout 600s;
            proxy_connect_timeout 600s;
            proxy_send_timeout 600s;

            # Disable buffering for large file uploads
            proxy_request_buffering off;
            proxy_buffering off;
            proxy_cache off;
            client_max_body_size 2G;
        }

        location /api {
            proxy_pass $appflowy_cloud_backend;

            proxy_set_header X-Request-Id $request_id;
            proxy_set_header Host $http_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;

            # Set CORS headers for other requests
            if ($http_origin ~* ($appflowy_web_origin)) {
                add_header 'Access-Control-Allow-Origin' $http_origin always;
            }
            add_header 'Access-Control-Allow-Methods' 'GET, POST, PUT, DELETE, PATCH' always;
            add_header 'Access-Control-Allow-Headers' 'Content-Type, Authorization, Accept, Client-Version' always;
            add_header 'Access-Control-Max-Age' 3600 always;

            location ~* ^/api/workspace/([a-zA-Z0-9_-]+)/publish$ {
                proxy_pass $appflowy_cloud_backend;
                proxy_request_buffering off;
                client_max_body_size 256M;
            }
        }

        # AppFlowy AI
        location /ai {
            proxy_pass $appflowy_ai_backend;
            proxy_set_header Host $host;
            proxy_pass_request_headers on;
        }

        # Minio Web UI
        # Derive from: https://min.io/docs/minio/linux/integrations/setup-nginx-proxy-with-minio.html
        # Optional Module, comment this section if you are did not deploy minio in docker-compose.yml
        location /minio/ {
            proxy_pass $minio_backend;

            rewrite ^/minio/(.*) /$1 break;
            proxy_set_header Host $http_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-NginX-Proxy true;

            ## This is necessary to pass the correct IP to be hashed
            real_ip_header X-Real-IP;

            proxy_connect_timeout 300;

            ## To support websockets in MinIO versions released after January 2023
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            # Some environments may encounter CORS errors (Kubernetes + Nginx Ingress)
            # Uncomment the following line to set the Origin request to an empty string
            # proxy_set_header Origin '';

            chunked_transfer_encoding off;
        }

        # PgAdmin
        # Optional Module, comment this section if you are did not deploy pgadmin in docker-compose.yml
        location /pgadmin/ {
            set $pgadmin pgadmin;
            proxy_pass $pgadmin_backend;

            proxy_set_header X-Script-Name /pgadmin;
            proxy_set_header X-Scheme $scheme;
            proxy_set_header Host $host;
            proxy_redirect off;
        }

        # Portainer
        # Optional Module, comment this section if you are did not deploy portainer in docker-compose.yml
        location /portainer/ {
            proxy_pass $portainer_backend;
            rewrite ^/portainer/(.*) /$1 break;
        }

        # Admin Frontend
        # Optional Module, comment this section if you are did not deploy admin_frontend in docker-compose.yml
        location / {
            proxy_pass $admin_frontend_backend;

            proxy_set_header X-Scheme $scheme;
            proxy_set_header Host $host;
        }
    }

}