local M = {
  'nvim-tree/nvim-tree.lua',
  event = 'VeryLazy',
}

local function my_on_attach(bufnr)
  local api = require('nvim-tree.api')

  local function opts(desc)
    return { desc = 'nvim-tree: ' .. desc, buffer = bufnr, noremap = true, silent = true, nowait = true }
  end

  -- default mappings
  api.config.mappings.default_on_attach(bufnr)

  -- custom mappings
  vim.keymap.set('n', 'l', api.node.open.edit, opts('Open'))
  vim.keymap.set('n', 'o', api.node.open.edit, opts('Open'))
  vim.keymap.set('n', '<CR>', api.node.open.edit, opts('Open'))
  vim.keymap.set('n', 'v', api.node.open.vertical, opts('Open: Vertical Split'))
  vim.keymap.set('n', 'h', api.node.open.horizontal, opts('Open: Horizontal Split'))
  vim.keymap.set('n', 'h', api.node.navigate.parent_close, opts('Close Directory'))
end

function M.config()
  local wk = require('which-key')
  wk.register({
    ['<leader>e'] = { '<cmd>NvimTreeToggle<CR>', 'Explorer' },
  })

  local icons = require('utils.icons')

  require('nvim-tree').setup({
    hijack_netrw = false,
    sync_root_with_cwd = true,
    on_attach = my_on_attach,
    renderer = {
      add_trailing = false,
      group_empty = false,
      highlight_git = false,
      full_name = false,
      highlight_opened_files = 'none',
      root_folder_label = ':t',
      indent_width = 2,
      indent_markers = {
        enable = false,
        inline_arrows = true,
        icons = {
          corner = '└',
          edge = '│',
          item = '│',
          none = ' ',
        },
      },
      icons = {
        git_placement = 'before',
        padding = ' ',
        symlink_arrow = ' ➛ ',
        glyphs = {
          default = icons.ui.Text,
          symlink = icons.ui.FileSymlink,
          bookmark = icons.ui.BookMark,
          folder = {
            arrow_closed = icons.ui.ChevronRight,
            arrow_open = icons.ui.ChevronShortDown,
            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.FolderOpen,
          },
          git = {
            unstaged = icons.git.FileUnstaged,
            staged = icons.git.FileStaged,
            unmerged = icons.git.FileUnmerged,
            renamed = icons.git.FileRenamed,
            untracked = icons.git.FileUntracked,
            deleted = icons.git.FileDeleted,
            ignored = icons.git.FileIgnored,
          },
        },
      },
      special_files = { 'Cargo.toml', 'Makefile', 'README.md', 'readme.md' },
      symlink_destination = true,
    },
    update_focused_file = {
      enable = true,
      debounce_delay = 15,
      update_root = true,
      ignore_list = {},
    },

    diagnostics = {
      enable = true,
      show_on_dirs = false,
      show_on_open_dirs = true,
      debounce_delay = 50,
      severity = {
        min = vim.diagnostic.severity.HINT,
        max = vim.diagnostic.severity.ERROR,
      },
      icons = {
        hint = icons.diagnostics.BoldHint,
        info = icons.diagnostics.BoldInformation,
        warning = icons.diagnostics.BoldWarning,
        error = icons.diagnostics.BoldError,
      },
    },
  })
end

return M