local UIWindow = {}
UIWindow.__index = UIWindow

--> Services
local ReplicatedStorage = game:GetService("ReplicatedStorage")

--> Variables
local FolderWindows = ReplicatedStorage:WaitForChild("UI"):WaitForChild("Windows")

local LocalPlayer = game.Players.LocalPlayer
local FolderPlayerGui = LocalPlayer:WaitForChild("PlayerGui")

--------------------------------------------------------------------------------

-- 递归查找
local function FindInDescendants(root, name)
    if root:FindFirstChild(name) then
        return root:FindFirstChild(name)
    end
    for _, child in ipairs(root:GetChildren()) do
        local found = FindInDescendants(child, name)
        if found then
            return found
        end
    end
    return nil
end

-- 非递归查找
local function FindInRoot(root, name)
    return root:FindFirstChild(name)
end

--------------------------------------------------------------------------------

function UIWindow:Init(Data: table?)
    local self = {}
    self.Data = Data
    self.Variables = {}
    self.UIRootName = nil
    self.UIParentName = nil


    self.UIRoot = nil
    self.AutoInject = false
    
    return self
end

function UIWindow:SetData(Data: table?)
    self.Data = Data
    self:OnDataChanged()
end

function UIWindow:OnOpenWindow()

    if not self.UIRoot then
        -- 创建UI根节点
        self.UIRoot = FolderWindows:FindFirstChild(self.UIRootName):Clone()
        self.UIRoot.Parent = FolderPlayerGui:FindFirstChild(self.UIParentName)
    end

    -- 自动注入
    if not self.AutoInject then
        for varName, _ in pairs(self.Variables) do
            if typeof(varName) == "string" then
                local firstChar = string.sub(varName, 1, 1)
                local secondChar = string.sub(varName, 2, 2)
                local target

                if firstChar == "_" then
                    if secondChar == "_" then
                        -- __开头，只查根目录
                        target = FindInRoot(self.UIRoot, varName)
                    else
                        -- _开头，递归查找
                        target = FindInDescendants(self.UIRoot, varName)
                    end

                    if not target then
                        error("自动注入失败：未找到UI节点 " .. varName)
                    end

                    self[varName] = target
                end
            end
        end
        self.AutoInject = true
    end
end

function UIWindow:OnCloseWindow()

end

--> 覆盖用
function UIWindow:OnDataChanged() end

function UIWindow:Refresh() end

return UIWindow