{ lib, config, ... }:
let
  inherit (lib) types mkOption;
  cfg = config.valhalla.fileSystems;
in {
  imports = [
    ./fileSystems/disks.nix
  ];

  options = {
    valhalla = {
      fileSystems = {
        script = mkOption {
          type = types.str;
          description = "The script for preparing the system's mounts.";
        };
      };
    };
  };

  config = {
    valhalla = {
      fileSystems = {
        script = let
          devices = (builtins.attrValues cfg.diskSetup.devices);
        in ''
          #!/bin/bash
          set -o errexit
          ${cfg.diskSetup.scripts.init}
          ${lib.strings.concatLines (lib.optionals ((builtins.length devices) > 0) [
            ''echo "$(tput setaf 3)=== WARNING ====$(tput sgr0)"''
            (''echo "Continuing this script will alter the partitions of ''
              + (lib.strings.concatStringsSep ", " (builtins.map (_: "${_.deviceVariable}") (lib.lists.init devices)))
              + (if (builtins.length devices) > 1 then " and " else "") + (lib.lists.last devices).deviceVariable + ''"'')
            ''
              if ! fish ${./fileSystems/confirm.fish} "Are you sure you want to continue?" "n"; then
                exit 1
              fi
            ''
          ])}
          ${cfg.diskSetup.scripts.partition}
          ${cfg.diskSetup.scripts.mount}
        '';
      };
    };
  };
}