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

  -- 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 {
    update_open_buffers = update_open_buffers,
    open_file_indicator = open_file_indicator
  }
end

return {
  {
    "nvim-neo-tree/neo-tree.nvim",
    opts = {
      sources = { "filesystem", "buffers", "git_status" },
      open_files_do_not_replace_types = { "terminal", "Trouble", "trouble", "qf", "Outline" },
      close_if_last_window = false,
      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().open_file_indicator,
        },
      },
      window = {
        mappings = {
          ["l"] = "open",
          ["h"] = "close_node",
          ["<space>"] = "none",
          ["Y"] = {
            function(state)
              local node = state.tree:get_node()
              local path = node:get_id()
              vim.fn.setreg("+", path, "c")
            end,
            desc = "Copy Path to Clipboard",
          },
          ["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 = false } },
        },
      },
      default_component_configs = {
        indent = {
          with_expanders = true,
          expander_collapsed = "",
          expander_expanded = "",
          expander_highlight = "NeoTreeExpander",
        },
        git_status = {
          symbols = {
            unstaged = "󰄱",
            staged = "󰱒",
          },
        },
      }
    },
    branch = "v3.x",
    dependencies = {
      "nvim-lua/plenary.nvim",
      "nvim-tree/nvim-web-devicons",
      "3rd/image.nvim",
    },
    config = function(_, opts)
      local indicators = setup_open_file_indicators()
      
      -- 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()
          indicators.update_open_buffers()
          if package.loaded["neo-tree.sources.manager"] then
            require("neo-tree.sources.manager").refresh("filesystem")
          end
        end,
      })

      require("neo-tree").setup(opts)
    end,
  }
}