{ pkgs, ... }:
let
  hx-zellij-open = pkgs.writeShellScriptBin "hx-zellij-open" ''
    set -eu
    if [ -z "''${ZELLIJ:-}" ]; then
      exec "''${EDITOR:-hx}" "$@"
    fi
    zellij="${pkgs.zellij}/bin/zellij"
    "$zellij" action move-focus right
    "$zellij" action write 27
    for f in "$@"; do
      "$zellij" action write-chars ":open \"$f\""
      "$zellij" action write 13
    done
  '';

  helixOpener = [
    {
      run = ''hx-zellij-open "$@"'';
      desc = "Open in Helix pane";
      block = false;
      for = "unix";
    }
  ];

  tomlFormat = pkgs.formats.toml { };

  ideYaziToml = tomlFormat.generate "yazi.toml" {
    mgr = {
      ratio = [
        0
        1
        0
      ];
      linemode = "none";
    };
    opener.edit = helixOpener;
  };

  ideKeymapToml = tomlFormat.generate "keymap.toml" {
    mgr.prepend_keymap = [
      {
        on = "h";
        run = "plugin bounded-leave";
        desc = "Parent dir (stop at project root)";
      }
      {
        on = "<Left>";
        run = "plugin bounded-leave";
        desc = "Parent dir (stop at project root)";
      }
    ];
  };

  boundedLeave = ''
    --- @sync entry
    local function entry()
    	local cwd = tostring(cx.active.current.cwd)
    	local root = os.getenv("YAZI_ROOT")
    	if root and root ~= "" and cwd == root then
    		-- At the project root: refuse to go higher.
    		return
    	end
    	ya.emit("leave", {})
    end

    return { entry = entry }
  '';

  yazi-ide = pkgs.writeShellScriptBin "yazi-ide" ''
    set -eu
    export YAZI_CONFIG_HOME="$HOME/.config/yazi-ide"
    root="$(${pkgs.git}/bin/git rev-parse --show-toplevel 2>/dev/null || true)"
    export YAZI_ROOT="''${root:-$PWD}"
    exec ${pkgs.yazi}/bin/yazi "$@"
  '';

  ideThemeToml = tomlFormat.generate "theme.toml" {
    status = {
      overall = {
        fg = "#abb2bf";
        bg = "#21252b";
      }; # readable text on a dark bar
      progress_label = {
        fg = "#abb2bf";
        bold = true;
      };
      progress_normal = {
        fg = "#98c379";
        bg = "#21252b";
      };
      progress_error = {
        fg = "#e06c75";
        bg = "#21252b";
      };
    };
    mode = {
      normal_main = {
        fg = "#21252b";
        bg = "#61afef";
        bold = true;
      };
      normal_alt = {
        fg = "#61afef";
        bg = "#21252b";
      };
      select_main = {
        fg = "#21252b";
        bg = "#98c379";
        bold = true;
      };
      select_alt = {
        fg = "#98c379";
        bg = "#21252b";
      };
      unset_main = {
        fg = "#21252b";
        bg = "#e06c75";
        bold = true;
      };
      unset_alt = {
        fg = "#e06c75";
        bg = "#21252b";
      };
    };
  };
in
{
  home.packages = [
    hx-zellij-open
    yazi-ide
  ];

  programs.yazi = {
    enable = true;
    enableZshIntegration = true;
    shellWrapperName = "y";
    settings.opener.edit = helixOpener;
  };

  xdg.configFile = {
    "yazi-ide/yazi.toml".source = ideYaziToml;
    "yazi-ide/theme.toml".source = ideThemeToml;
    "yazi-ide/keymap.toml".source = ideKeymapToml;
    "yazi-ide/plugins/bounded-leave.yazi/main.lua".text = boundedLeave;

    "yazi-ide/init.lua".text = ''
      -- Render the header path relative to YAZI_ROOT (the project root you
      -- launched the layout in), anchored on the project's directory name.
      -- Outside that root, fall back to Yazi's default ~/-style path.
      function Header:cwd()
      	local max = self._area.w - self._right_width
      	if max <= 0 then
      		return ""
      	end

      	local cwd  = tostring(self._current.cwd)
      	local root = os.getenv("YAZI_ROOT") or ""
      	local s
      	if root ~= "" and (cwd == root or cwd:sub(1, #root + 1) == root .. "/") then
      		local base = root:match("([^/]+)/?$") or root  -- project dir name
      		s = base .. cwd:sub(#root + 1)                  -- e.g. "myrepo/src/lib"
      	else
      		s = ya.readable_path(cwd)
      	end

      	s = s .. self:flags()
      	return ui.Span(ui.truncate(s, { max = max, rtl = true })):style(th.mgr.cwd)
      end
    '';
  };
}