{ lib, pkgs, sources, ... }:

let
  package = pkgs.callPackage ./package.nix { src = sources.metis; };

  providers = {
    klub-reseau = "nuage.beta.rz.ens.wtf";
    eleves-ens = "cloud.eleves.ens.fr";
    frama-agenda = "framagenda.org";
  };

  nginxConf = {
    enableACME = true;
    forceSSL = true;
    root = package;

    locations = lib.mapAttrs' (name: attrs:
      lib.nameValuePair "/cal/${name}/" {
        extraConfig = ''
          proxy_set_header X-Forwarded-Host $host;
          proxy_set_header X-Forwarded-Server $host;
          proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
          proxy_pass https://${
            providers.${name}
          }/remote.php/dav/public-calendars/;
        '';
      }) providers;

    extraConfig = ''
      rewrite ^/calendrier(.*)$ $1 permanent;
    '';
  };

in {
  services.nginx.virtualHosts = {
    "calendrier.eleves.ens.fr" = nginxConf;
    "calendrier.dgnum.eu" = nginxConf;
  };
}