local on_attach = function(buffer)
  local api = require("nvim-tree.api")

  -- Give me the default mappings except <c-x>, which I replace with <c-s>.
  api.config.mappings.default_on_attach(buffer)
  vim.keymap.del("n", "<c-x>", { buffer = buffer })

  local map = vim.keymap.set
  local opts = function(desc)
    return {
      desc = "󰙅 nvim-tree: " .. desc,
      buffer = buffer,
      silent = true,
    }
  end

  -- stylua: ignore start
  map("n", "l",     api.node.open.edit,             opts("Open"))
  map("n", "<cr>",  api.node.open.edit,             opts("Open"))
  map("n", "<c-s>", api.node.open.horizontal,       opts("Open: Horizontal Split"))
  map("n", "h",     api.node.navigate.parent_close, opts("Close directory"))
  -- stylua: ignore end
end

local icons = require("util.icons")

return {
  "nvim-tree/nvim-tree.lua",

  dependencies = "nvim-tree/nvim-web-devicons",

  keys = {
    -- stylua: ignore start
    { "<leader>tt", "<cmd>NvimTreeToggle<cr>",   desc = icons.ui.FileTree.." [t]oggle [t]ree" },
    { "<leader>tf", "<cmd>NvimTreeFindFile<cr>", desc = icons.ui.FileTree.." Open [t]ree to current [f]ile " },
    -- stylua: ignore end
  },

  opts = {
    disable_netrw = true, -- replace netrw with nvim-tree
    hijack_cursor = true, -- keep the cursor on begin of the filename
    sync_root_with_cwd = true, -- watch for `DirChanged` and refresh the tree
    on_attach = on_attach,
    git = {
      ignore = false, -- don't hide files from .gitignore
      show_on_open_dirs = false, -- don't show indication if dir is open
    },
    view = {
      adaptive_size = true, -- resize the window based on the longest line
      cursorline = false, -- don't enable 'cursorline' in the tree
      width = 35, -- a little wider than the default 30
    },
    filters = {
      dotfiles = false, -- show files starting with a .
      custom = { "^\\.git" }, -- don't show .git directory
    },
    renderer = {
      add_trailing = true, -- add trailing / to folders
      highlight_git = true, -- enable highlight based on git attributes
      icons = {
        webdev_colors = false, -- highlight icons with NvimTreeFileIcon
        git_placement = "signcolumn",
        -- stylua: ignore start
        glyphs = {
          default        = icons.ui.File,
          symlink        = icons.ui.FileSymlink,
          modified       = icons.ui.Circle,
          folder = {
            arrow_closed = icons.ui.ChevronSmallRight,
            arrow_open   = icons.ui.ChevronSmallDown,
            default      = icons.ui.Folder,
            open         = icons.ui.FolderOpen,
            empty        = icons.ui.EmptyFolder,
            empty_open   = icons.ui.EmptyFolderOpen,
            symlink      = icons.ui.FolderSymlink,
            symlink_open = icons.ui.FolderSymlink,
          },
          git = {
            untracked    = icons.git.file.Untracked,
            unstaged     = icons.git.file.Unstaged,
            staged       = icons.git.file.Staged,
            deleted      = icons.git.file.Deleted,
            unmerged     = icons.git.file.Unmerged,
            renamed      = icons.git.file.Renamed,
            ignored      = icons.git.file.Ignored,
          },
        },
        -- stylua: ignore end
      },
    },
  },
}