worker_processes auto;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
  worker_connections 1024;
}

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

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

  sendfile on;
  keepalive_timeout 65;

  server {
    server_name uechi.io;
    listen 80;

    root /var/www/html;
    error_page 404 /404.html;

    # Matix/Synapse
    # https://matrix-org.github.io/synapse/develop/reverse_proxy.html
    # https://matrix-org.github.io/synapse/latest/setup/installation.html#client-well-known-uri
    location ~ ^(/_matrix|/_synapse/client) {
      # note: do not add a path (even a single /) after the port in `proxy_pass`,
      # otherwise nginx will canonicalise the URI and cause signature verification
      # errors.

      # https://stackoverflow.com/a/54719226/2276646
      resolver 127.0.0.11 valid=30s;
      set $upstream_synapse synapse;
      proxy_pass http://$upstream_synapse:8008;

      proxy_set_header X-Forwarded-For $remote_addr;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header Host $host;

      # Nginx by default only allows file uploads up to 1M in size
      # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
      client_max_body_size 50M;
    }
    location /.well-known/matrix/client {
      return 200 '{"m.homeserver": {"base_url": "https://matrix.uechi.io"}}';
      default_type application/json;
      add_header Access-Control-Allow-Origin *;
    }
    location /.well-known/matrix/server {
      return 200 '{"m.server": "matrix.uechi.io:443"}';
      default_type application/json;
      add_header Access-Control-Allow-Origin *;
    }

    location /404.html {
      internal;
    }

    location = /robots.txt {
      allow all;
      log_not_found off;
      access_log off;
    }

    location / {
      index index.html;
      try_files $uri $uri.html $uri/index.html @fallback;
    }

    location = / {
      if ($http_user_agent ~ curl) {
        rewrite / /TERMINAL last;
      }
    }
    
    location @fallback {
      root /var/www/html/_;
      try_files $uri $uri.html $uri/index.html =404;
    }
  }

  server {
    listen 80;
    server_name www.uechi.io;
    return 301 $scheme://uechi.io$request_uri;
  }
}