local function setup_open_file_indicators()
  -- Table to store open buffers
  local open_buffers = {}

  -- Function to update open_buffers table
  local function update_open_buffers()
    open_buffers = {}
    for _, buf in ipairs(vim.api.nvim_list_bufs()) do
      if vim.api.nvim_buf_is_valid(buf) and vim.bo[buf].buflisted then
        local file_path = vim.api.nvim_buf_get_name(buf)
        open_buffers[file_path] = true
      end
    end
  end

  -- Update open_buffers initially
  update_open_buffers()

  -- Set up autocmds to update open_buffers and refresh Neo-tree
  local group = vim.api.nvim_create_augroup("NeoTreeOpenFileIndicator", { clear = true })
  vim.api.nvim_create_autocmd({"BufAdd", "BufDelete", "BufWipeout"}, {
    group = group,
    callback = function()
      update_open_buffers()
      if package.loaded["neo-tree.sources.manager"] then
        require("neo-tree.sources.manager").refresh("filesystem")
      end
    end,
  })

  -- Custom component to display open file indicator
  local function open_file_indicator(config, node, state)
    local result = require("neo-tree.sources.common.components").icon(config, node, state)
    if node.type == "file" and open_buffers[node:get_id()] then
      result.text = result.text .. "󱞇 "
    end
    return result
  end

  return open_file_indicator
end

return {
  {
    "nvim-neo-tree/neo-tree.nvim",
    opts = function()
      return {
        sources = { "filesystem", "buffers", "git_status" },
        open_files_do_not_replace_types = { "terminal", "Trouble", "trouble", "qf", "Outline" },
        close_if_last_window = true,
        popup_border_style = "rounded",
        enable_git_status = true,
        enable_diagnostics = true,
        filesystem = {
          bind_to_cwd = false,
          follow_current_file = { enabled = true },
          use_libuv_file_watcher = true,
          components = {
            icon = setup_open_file_indicators(),
          },
        },
        window = {
          mappings = {
            ["l"] = "open",
            ["o"] = "open",
            ["C-v"] = "open_split",
            ["h"] = "close_node",
            ["<space>"] = "none",
            ["O"] = {
              function(state)
                require("lazy.util").open(state.tree:get_node().path, { system = true })
              end,
              desc = "Open with System Application",
            },
            ["P"] = { "toggle_preview", config = { use_float = true } },
          },
        },
        default_component_configs = {
          indent = {
            with_expanders = true,
            expander_collapsed = "",
            expander_expanded = "",
            expander_highlight = "NeoTreeExpander",
          },
          git_status = {
            symbols = {
              unstaged = "󰄱",
              staged = "󰱒",
            },
          },
        }
      }
    end,
    branch = "v3.x",
    dependencies = {
      "nvim-lua/plenary.nvim",
      "nvim-tree/nvim-web-devicons",
      "3rd/image.nvim",
    },
  }
}