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

let
  inherit (lib) mkEnableOption mkIf readFile;

  cfg = config.my.programs.nvim;
in
{
  imports = lib.my.listModulesRec ./plugins;

  options.my.programs.nvim.enable = mkEnableOption "nvim";

  config = mkIf cfg.enable {
    home-manager.users.moritz = {
      xdg.configFile."nvim/snippets" = {
        recursive = true;
        source = ./plugins/snippets;
      };

      home.packages = with pkgs; [
        xdotool # for vimtex
      ];

      #   programs.neovim = {
      #     enable = true;
      #     package = inputs.neovim-nightly-overlay.packages.${pkgs.system}.default;
      #     vimAlias = true;
      #     vimdiffAlias = true;
      #     withNodeJs = true;
      #     withPython3 = true;
      #     extraPackages = with pkgs;
      #       [
      #         alejandra
      #         checkmake
      #         codespell
      #         deadnix
      #         dotenv-linter
      #         fish
      #         jq
      #         nil
      #         nixd
      #         nixpkgs-fmt
      #         nodePackages.bash-language-server
      #         python3Packages.python-lsp-server
      #         shellcheck
      #         shfmt
      #         stable.yamlfix
      #         statix
      #         taplo
      #         yamllint
      #       ];
      #     extraLuaConfig = readFile ./options.lua;
      #     lazy.enable = true;
      #   };

      programs.nixvim = {
        enable = true;
        package = inputs.neovim-nightly-overlay.packages.${pkgs.system}.default;
        vimAlias = true;

        colorschemes.catppuccin.enable = true;
        colorschemes.catppuccin.settings.flavour = "macchiato";

        plugins.lualine.enable = true;

        plugins.cmp.autoEnableSources = true;
        plugins.cmp.enable = true;
        plugins.cmp.settings.sources = [
          { priority = 1; name = "async_path"; }
          { priority = 1; name = "buffer"; }
          { priority = 2; name = "nvim_lsp"; }
          { priority = 3; name = "nvim_lsp_signature_help"; }
          { priority = 4; name = "luasnip"; }
          { priority = 4; name = "vimtex"; }
        ];
        plugins.cmp.settings.mapping = {
          __raw = ''
            cmp.mapping.preset.insert({
                ['<C-b>'] = cmp.mapping.scroll_docs(-4),
                ['<C-f>'] = cmp.mapping.scroll_docs(4),
                ['<C-Space>'] = cmp.mapping.complete(),
                ['<C-e>'] = cmp.mapping.abort(),
                ['<CR>'] = cmp.mapping.confirm({ select = true }),
                ["<Tab>"] = cmp.mapping(function(fallback)
                  if cmp.visible() then
                    cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
                  elseif require("luasnip").locally_jumpable(1) then
                    require("luasnip").jump(1)
                  else
                    fallback()
                  end
                end, { "i", "s" }),
                ["<S-Tab>"] = cmp.mapping(function(fallback)
                  if cmp.visible() then
                    cmp.select_prev_item({ behavior = cmp.SelectBehavior.Select })
                  elseif require("luasnip").locally_jumpable(-1) then
                    require("luasnip").jump(-1)
                  else
                    fallback()
                  end
                end, { "i", "s" }),
                ["<C-n>"] = cmp.mapping(function(fallback)
                  if require("luasnip").choice_active() then
                    require("luasnip").change_choice(1)
                  elseif require("luasnip").locally_jumpable(1) then
                    require("luasnip").jump(1)
                  else
                    fallback()
                  end
                end, { "i", "s" }),
                ["<C-p>"] = cmp.mapping(function(fallback)
                  if require("luasnip").choice_active() then
                    require("luasnip").change_choice(-1)
                  elseif require("luasnip").locally_jumpable(-1) then
                    require("luasnip").jump(-1)
                  else
                    fallback()
                  end
                end, { "i", "s" }),
            })
          '';
        };

        plugins.luasnip.enable = true;
        plugins.luasnip.settings = {
          history = true;
          update_events = "TextChanged,TextChangedI";
          delete_check_events = "TextChanged";
          ext_opts.__raw = ''{
            [require("luasnip.util.types").choiceNode] = {
              active = {
                virt_text = { { "<--", "Error" } },
              },
            },
          }'';
          ft_func.__raw = ''require("luasnip.extras.filetype_functions").from_pos_or_filetype'';
        };

        plugins.lsp.enable = true;
        plugins.lsp.inlayHints = true;
        plugins.lsp.servers.nil-ls.enable = true;
        plugins.lsp.servers.nixd.enable = true;
        plugins.lsp.servers.nixd.extraOptions.settings.nixd = {
          nixpkgs = {
            expr = "import <nixpkgs> { }";
          };
          options = {
            nixos = {
              expr = ''(builtins.getFlake ("git+file://" + toString ./.)).nixosConfigurations.nixos-desktop.options'';
            };
            "flake-parts" = {
              expr = ''(builtins.getFlake ("git+file://" + toString ./.)).debug.options'';
            };
            "flake-parts2" = {
              expr = ''(builtins.getFlake ("git+file://" + toString ./.)).currentSystem.options'';
            };
          };
        };
        plugins.lspsaga = {
          enable = true;
          codeAction.keys.quit = "<esc>";
          lightbulb.virtualText = false;
        };
        keymapsOnEvents = {
          LspAttach = [
            {
              key = "<leader>cc";
              action = "<cmd>Lspsaga code_action<cr>";
              options.desc = "Code Action";
              options.buffer = true;
            }
            {
              key = "gd";
              action = "<cmd>Lspsaga goto_definition<cr>";
              options.desc = "Goto Definition";
              options.buffer = true;
            }
            {
              key = "<leader>cr";
              action = "<cmd>Lspsaga rename<cr>";
              options.desc = "Rename";
              options.buffer = true;
            }
            {
              key = "K";
              action = "<cmd>Lspsaga hover_doc<cr>";
              options.desc = "Hover";
              options.buffer = true;
            }
          ];
        };

        plugins.nvim-ufo.enable = true;

        plugins.treesitter = {
          enable = true;
          folding = true;
          nixvimInjections = true;
          settings.indent.enable = true;
          settings.highlight.enable = true;
        };

        plugins.which-key.enable = true;
        plugins.lastplace.enable = true;
        plugins.comment.enable = true;
        plugins.ts-context-commentstring.enable = true;

        plugins.vimtex = {
          enable = true;
          settings.view_method = "zathura";
        };

        plugins.todo-comments.enable = true;
        plugins.todo-comments.keymaps.todoTelescope.key = "<leader>fc";

        plugins.conform-nvim.enable = true;
        plugins.conform-nvim.settings.formatters_by_ft = {
          "*" = [ "codespell" "trim_whitespace" ];
          elixir = [ "mix" ];
          gleam = [ "gleam" ];
          go = [ "gofmt" ];
          json = [ "jq" ];
          lua = [ "stylua" ];
          nix = [ [ "nixpkgs_fmt" "alejandra" ] ];
          python = [ [ "ruff_fix" "isort" ] [ "ruff_format" "black" ] ];
          rust = [ "rustfmt" ];
          sh = [ "shfmt" ];
          tex = [ "latexindent" ];
          toml = [ "taplo" ];
          yaml = [ "yamlfix" ];
        };

        keymaps = [
          { key = "<esc>"; action = "<cmd>noh<cr><esc>"; options.desc = "Escape and clear hlsearch"; mode = [ "i" "n" ]; }
        ];
        opts.formatexpr = "v:lua.require'conform'.formatexpr()";

        extraConfigLua = ''
          vim.api.nvim_create_user_command("Format", function(opts)
            require("conform").format({ formatters = opts.fargs })
          end, {
            nargs = "+",
            complete = function()
              local names = formatters_by_ft[vim.bo.filetype] or formatters_by_ft["_"] or {}
              names = vim.list_extend(names, formatters_by_ft["*"] or {})
              names = vim.tbl_flatten(names)
              local formatters = vim.tbl_map(require("conform").get_formatter_info, names)
              formatters = vim.tbl_filter(function(formatter)
                return formatter.available
              end, formatters)
              return vim.tbl_map(function(formatter_info)
                return formatter_info.name
              end, formatters)
            end,
          })
        '';

        plugins.oil.enable = true;

        plugins.telescope.enable = true;
        plugins.telescope.extensions.fzf-native.enable = true;
        plugins.telescope.keymaps = {
          "<leader>ff" = {
            action = "find_files";
            options.desc = "Find files";
          };
          "<leader>fb" = {
            action = "buffers";
            options.desc = "Find buffers";
          };
          "<leader>fl" = {
            action = "current_buffer_fuzzy_find";
            options.desc = "Search lines";
          };
          "<leader>fg" = {
            action = "live_grep";
            options.desc = "Live grep";
          };
          "<leader>fh" = {
            action = "help_tags";
            options.desc = "Help tags";
          };
          "<leader>fr" = {
            action = "oldfiles";
            options.desc = "Recent files";
          };
        };

        plugins.nvim-autopairs.enable = true;

        plugins.surround.enable = true;

        extraConfigLuaPre = readFile ./options.lua;
        performance = {
          byteCompileLua = {
            enable = true;
            configs = true;
            initLua = true;
            nvimRuntime = true;
            plugins = true;
          };
          combinePlugins.enable = true;
          combinePlugins.standalonePlugins = [
            "nvim-treesitter"
            "conform.nvim"
          ];
        };
      };
    };
  };
}