local watch = require("nvim-tree.explorer.watch")

local BaseNode = require("nvim-tree.node")

---@class (exact) DirectoryNode: BaseNode
---@field has_children boolean
---@field group_next Node? -- If node is grouped, this points to the next child dir/link node
---@field nodes Node[]
---@field open boolean
---@field hidden_stats table? -- Each field of this table is a key for source and value for count
local DirectoryNode = BaseNode:new()

---Static factory method
---@param explorer Explorer
---@param parent Node?
---@param absolute_path string
---@param name string
---@param fs_stat uv.fs_stat.result|nil
---@return DirectoryNode
function DirectoryNode:create(explorer, parent, absolute_path, name, fs_stat)
  local handle = vim.loop.fs_scandir(absolute_path)
  local has_children = handle and vim.loop.fs_scandir_next(handle) ~= nil or false

  ---@type DirectoryNode
  local o = {
    type = "directory",
    explorer = explorer,
    absolute_path = absolute_path,
    executable = false,
    fs_stat = fs_stat,
    git_status = nil,
    hidden = false,
    is_dot = false,
    name = name,
    parent = parent,
    watcher = nil,
    diag_status = nil,

    has_children = has_children,
    group_next = nil,
    nodes = {},
    open = false,
    hidden_stats = nil,
  }
  o = self:new(o) --[[@as DirectoryNode]]

  o.watcher = watch.create_watcher(o)

  return o
end

function DirectoryNode:destroy()
  BaseNode.destroy(self)
  if self.nodes then
    for _, node in pairs(self.nodes) do
      node:destroy()
    end
  end
end

---Create a sanitized partial copy of a node, populating children recursively.
---@return DirectoryNode cloned
function DirectoryNode:clone()
  local clone = BaseNode.clone(self) --[[@as DirectoryNode]]

  clone.has_children = self.has_children
  clone.group_next = nil
  clone.nodes = {}
  clone.open = self.open
  clone.hidden_stats = nil

  for _, child in ipairs(self.nodes) do
    table.insert(clone.nodes, child:clone())
  end

  return clone
end

return DirectoryNode