# Forgejo
{ config, pkgs, lib, ... }:

let
  inherit (lib) mkOption mkDefault;
in
{
  options = {
    nixin.forgejo = {
      http-port = mkOption { type = lib.types.int; };
      domain = mkOption { type = lib.types.str; };
      smtp-addr = mkOption { type = lib.types.str; };
      smtp-user = mkOption { type = lib.types.str; };
      smtp-from = mkOption { type = lib.types.str; };
      #smtp-pwd = mkOption { type = lib.types.str; };
      smtp-pwd-file = mkOption { type = lib.types.str; };
      admin-email = mkOption { type = lib.types.str; };
      admin-user = mkOption { type = lib.types.str; };
      admin-pwd = mkOption { type = lib.types.str; };
    };
  };

  config = {
    services.forgejo = {
      enable = true;
      database.type = "postgres";
      # Enable support for Git Large File Storage
      lfs.enable = true;
      settings = {
        server = {
          DOMAIN = "${config.nixin.forgejo.domain}";
          # You need to specify this to remove the port from URLs in the web UI.
          ROOT_URL = "https://${config.nixin.forgejo.domain}/";
          HTTP_PORT = config.nixin.forgejo.http-port;
        };
        # You can temporarily allow registration to create an admin user.
        service.DISABLE_REGISTRATION = true;
        # Add support for actions, based on act: https://github.com/nektos/act
        actions = {
          ENABLED = true;
          DEFAULT_ACTIONS_URL = "github";
        };
        # Sending emails is completely optional
        # You can send a test email from the web UI at:
        # Profile Picture > Site Administration > Configuration > Mailer Configuration
        mailer = {
          ENABLED = true;
          PROTOCOL = "smtp+starttls";
          SMTP_ADDR = "${config.nixin.forgejo.smtp-addr}";
          FROM = "${config.nixin.forgejo.smtp-from}";
          USER = "${config.nixin.forgejo.smtp-user}";
          #PASSWD = "${config.nixin.forgejo.smtp-pwd}";
        };
      };
      secrets.mailer.PASSWD = "${config.nixin.forgejo.smtp-pwd-file}";
    };

    environment.systemPackages = let
      cfg = config.services.forgejo;
      forgejo-cli = pkgs.writeScriptBin "forgejo" ''
        #!${pkgs.runtimeShell}
        cd ${cfg.stateDir}
        sudo=exec
        if [[ "$USER" != forgejo ]]; then
          sudo='exec /run/wrappers/bin/sudo -u ${cfg.user} -g ${cfg.group} --preserve-env=GITEA_WORK_DIR --preserve-env=GITEA_CUSTOM'
        fi
        # Note that these variable names will change
        export GITEA_WORK_DIR=${cfg.stateDir}
        export GITEA_CUSTOM=${cfg.customDir}
        $sudo ${lib.getExe cfg.package} "$@"
      ''; 
    in [
      forgejo-cli
    ];

    networking.hosts = {
      "127.0.0.1" = ["${config.nixin.forgejo.domain}"];
    };

    systemd.services.forgejo.preStart = let 
      adminCmd = "${lib.getExe config.services.forgejo.package} admin user";
    in ''
      env >/tmp/debug
      ${adminCmd} create --admin --email "${config.nixin.forgejo.admin-email}" --username "${config.nixin.forgejo.admin-user}" --password "${config.nixin.forgejo.admin-pwd}" || true
      ## uncomment this line to change an admin user which was already created
      # ${adminCmd} change-password --username ${config.nixin.forgejo.admin-user} --password "${config.nixin.forgejo.admin-pwd}" || true
    '';


    services.traefik.dynamicConfigOptions.http.services."service-forgejo" = {
      loadBalancer.servers = [
        { url = "http://localhost:${toString config.nixin.forgejo.http-port}"; }
      ];
    };
    services.traefik.dynamicConfigOptions.http.routers."router-forgejo" = {
      rule = "Host(`${config.nixin.forgejo.domain}`)";
      service = "service-forgejo";
    };
  };
}