# Midnight Commander: TUI file manager. Its config (ini, panels, F2 user menu,
# mc.ext.ini file associations) is opinionated but generic, so it lives in the
# public baseline alongside the other desktop tooling. The only personal value
# is the right-panel start dir, exposed as an option defaulting to the
# consumer's own home. mc.ext.ini keeps archive browsing but routes every other
# type to xdg-open, so the app choices live in xdg.mimeApps (baseline: mime.nix).
#
# ouch backs the F2 pack/unpack entries (one tool, archive format inferred from
# the extension), so it ships with mc to keep the menu self-contained.
#
# mc honours XDG natively: config in $XDG_CONFIG_HOME/mc (the files below),
# mutable runtime state (history, cursor positions) in $XDG_DATA_HOME/mc — no
# env vars needed. `ini` sets auto_save_setup=false so mc never rewrites these
# read-only store symlinks on exit.
#
# The F2 menu is a `types.lines` option, not a baked source file, so consumers
# can extend or replace it. The shipped menu is a `mkBefore` definition (stays
# first, ahead of appended entries), NOT a `default` — a `default` is dropped
# the moment a consumer adds a definition, which would lose the base. As a real
# definition it merges: `local.mc.menu = "…";` appends after the base entries;
# `lib.mkForce "…"` replaces it wholesale.

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

{
  options.local.mc = {
    otherDir = lib.mkOption {
      type = lib.types.str;
      default = config.home.homeDirectory;
      defaultText = lib.literalExpression "config.home.homeDirectory";
      description = "Startup directory for mc's other (right) panel.";
    };

    menu = lib.mkOption {
      type = lib.types.lines;
      description = ''
        Contents of mc's F2 user menu. The shipped baseline is a mkBefore
        definition, so a plain assignment appends entries after it; use
        lib.mkForce to replace it entirely.
      '';
    };

    extIni = lib.mkOption {
      type = lib.types.lines;
      description = ''
        Contents of mc's mc.ext.ini (file-type associations driving Enter/F3/F4).
        The shipped baseline keeps mc's archive browsing and delegates every
        other type to xdg-open, so the actual app is the XDG mimeapps default.
        Like `menu`, it is a mkBefore definition: append a same-named section to
        override one key (mc merges same-named sections, last key wins), or use
        lib.mkForce to replace it entirely.
      '';
    };
  };

  config = {
    home.packages = [ pkgs.mc pkgs.ouch ];

    local.mc.menu = lib.mkBefore (builtins.readFile ./assets/mc/menu);
    local.mc.extIni = lib.mkBefore (builtins.readFile ./assets/mc/mc.ext.ini);

    xdg.configFile = {
      "mc/ini".source = ./assets/mc/ini;
      "mc/menu".text = config.local.mc.menu;
      "mc/mc.ext.ini".text = config.local.mc.extIni;

      # Generated (not a static asset) so other_dir tracks the option instead of
      # baking in a personal path.
      "mc/panels.ini".text = ''
        [New Left Panel]
        display=listing
        reverse=false
        case_sensitive=true
        exec_first=false
        sort_order=name
        list_mode=full
        brief_cols=2
        user_format=half type name | size | perm | mtime
        user_status0=half type name | size | perm
        user_status1=half type name | size | perm
        user_status2=half type name | size | perm
        user_status3=half type name | owner | group | ctime
        user_mini_status=true
        list_format=user

        [New Right Panel]
        display=listing
        reverse=false
        case_sensitive=true
        exec_first=false
        sort_order=name
        list_mode=full
        brief_cols=2
        user_format=half type name | size | perm | mtime
        user_status0=half type name | size | perm
        user_status1=half type name | size | perm
        user_status2=half type name | size | perm
        user_status3=half type name | owner | group | ctime
        user_mini_status=true
        list_format=user

        [Dirs]
        current_is_left=true
        other_dir=${config.local.mc.otherDir}
      '';
    };
  };
}