local Players = game:GetService("Players")
local UserInputService = game:GetService("UserInputService")
local TextChatService = game:GetService("TextChatService")
local CoreGui = game:GetService("CoreGui")

local env = (getgenv and getgenv()) or _G
env.__ChatBlocker = env.__ChatBlocker or { enabled = false, hooked = false }
local State = env.__ChatBlocker

if State.unload then
    pcall(State.unload)
end

local function isLegacyChatRemote(inst)
    return typeof(inst) == "Instance"
        and inst.ClassName == "RemoteEvent"
        and inst.Name == "SayMessageRequest"
end

local function isTextChannel(inst)
    return typeof(inst) == "Instance" and inst.ClassName == "TextChannel"
end

if not State.hooked then
    State.hooked = true

    if hookmetamethod and getnamecallmethod then
        local oldNamecall
        oldNamecall = hookmetamethod(game, "__namecall", newcclosure(function(self, ...)
            if State.enabled then
                local method = getnamecallmethod()
                if method == "FireServer" and isLegacyChatRemote(self) then
                    return
                end
                if method == "SendAsync" and isTextChannel(self) then
                    return
                end
            end
            return oldNamecall(self, ...)
        end))
    else
        warn("[ChatBlocker] executor has no hookmetamethod, namecall hook will not be installed")
    end

    if hookfunction then
        local function hookMethod(className, methodName, check)
            pcall(function()
                local dummy = Instance.new(className)
                local orig
                orig = hookfunction(dummy[methodName], newcclosure(function(self, ...)
                    if State.enabled and check(self) then
                        return
                    end
                    return orig(self, ...)
                end))
                dummy:Destroy()
            end)
        end

        hookMethod("RemoteEvent", "FireServer", isLegacyChatRemote)
        hookMethod("TextChannel", "SendAsync", isTextChannel)
    end
end

local function setInputBar(blocked)
    pcall(function()
        local cfg = TextChatService:FindFirstChildOfClass("ChatInputBarConfiguration")
        if not cfg then
            return
        end
        if blocked then
            if State.prevBar == nil then
                State.prevBar = cfg.Enabled
            end
            cfg.Enabled = false
        elseif State.prevBar ~= nil then
            cfg.Enabled = State.prevBar
            State.prevBar = nil
        end
    end)
end

local function getGuiParent()
    if gethui then
        local ok, ui = pcall(gethui)
        if ok and ui then
            return ui
        end
    end
    if pcall(function() return CoreGui:GetChildren() end) then
        return CoreGui
    end
    return Players.LocalPlayer:WaitForChild("PlayerGui")
end

local gui = Instance.new("ScreenGui")
gui.Name = "ChatBlockerGui"
gui.ResetOnSpawn = false
gui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling
if syn and syn.protect_gui then
    pcall(syn.protect_gui, gui)
end
gui.Parent = getGuiParent()

local frame = Instance.new("Frame")
frame.Name = "Main"
frame.Size = UDim2.fromOffset(220, 112)
frame.Position = UDim2.new(0.5, -110, 0.3, 0)
frame.BackgroundColor3 = Color3.fromRGB(28, 28, 34)
frame.BorderSizePixel = 0
frame.Parent = gui
Instance.new("UICorner", frame).CornerRadius = UDim.new(0, 8)

local title = Instance.new("TextLabel")
title.Name = "Title"
title.Size = UDim2.new(1, 0, 0, 30)
title.BackgroundColor3 = Color3.fromRGB(40, 40, 50)
title.BorderSizePixel = 0
title.Text = "  Chat Blocker"
title.TextXAlignment = Enum.TextXAlignment.Left
title.TextColor3 = Color3.fromRGB(235, 235, 240)
title.Font = Enum.Font.SourceSansBold
title.TextSize = 18
title.Parent = frame
Instance.new("UICorner", title).CornerRadius = UDim.new(0, 8)

local closeBtn = Instance.new("TextButton")
closeBtn.Name = "Close"
closeBtn.Size = UDim2.fromOffset(30, 30)
closeBtn.Position = UDim2.new(1, -30, 0, 0)
closeBtn.BackgroundTransparency = 1
closeBtn.Text = "X"
closeBtn.TextColor3 = Color3.fromRGB(230, 90, 90)
closeBtn.Font = Enum.Font.SourceSansBold
closeBtn.TextSize = 18
closeBtn.Parent = title

local toggle = Instance.new("TextButton")
toggle.Name = "Toggle"
toggle.Size = UDim2.new(1, -24, 0, 40)
toggle.Position = UDim2.new(0, 12, 0, 42)
toggle.BorderSizePixel = 0
toggle.TextColor3 = Color3.fromRGB(255, 255, 255)
toggle.Font = Enum.Font.SourceSansBold
toggle.TextSize = 20
toggle.AutoButtonColor = true
toggle.Parent = frame
Instance.new("UICorner", toggle).CornerRadius = UDim.new(0, 6)

local hint = Instance.new("TextLabel")
hint.Name = "Hint"
hint.Size = UDim2.new(1, -24, 0, 18)
hint.Position = UDim2.new(0, 12, 0, 88)
hint.BackgroundTransparency = 1
hint.Text = "RShift - hide / show"
hint.TextColor3 = Color3.fromRGB(130, 130, 140)
hint.Font = Enum.Font.SourceSans
hint.TextSize = 14
hint.Parent = frame

local function refresh()
    if State.enabled then
        toggle.Text = "Chat: BLOCKED"
        toggle.BackgroundColor3 = Color3.fromRGB(46, 160, 90)
    else
        toggle.Text = "Chat: ALLOWED"
        toggle.BackgroundColor3 = Color3.fromRGB(170, 55, 55)
    end
end

local function setBlocked(value)
    State.enabled = value
    setInputBar(value)
    refresh()
end

local conns = {}
local function connect(signal, fn)
    local c = signal:Connect(fn)
    table.insert(conns, c)
    return c
end

local dragging, dragStart, startPos, dragInput

connect(title.InputBegan, function(input)
    if input.UserInputType == Enum.UserInputType.MouseButton1
        or input.UserInputType == Enum.UserInputType.Touch then
        dragging = true
        dragStart = input.Position
        startPos = frame.Position
        input.Changed:Connect(function()
            if input.UserInputState == Enum.UserInputState.End then
                dragging = false
            end
        end)
    end
end)

connect(title.InputChanged, function(input)
    if input.UserInputType == Enum.UserInputType.MouseMovement
        or input.UserInputType == Enum.UserInputType.Touch then
        dragInput = input
    end
end)

connect(UserInputService.InputChanged, function(input)
    if dragging and input == dragInput then
        local delta = input.Position - dragStart
        frame.Position = UDim2.new(
            startPos.X.Scale, startPos.X.Offset + delta.X,
            startPos.Y.Scale, startPos.Y.Offset + delta.Y
        )
    end
end)

local function unload()
    State.enabled = false
    setInputBar(false)
    for _, c in ipairs(conns) do
        pcall(function() c:Disconnect() end)
    end
    if gui then
        gui:Destroy()
    end
    State.unload = nil
end
State.unload = unload

connect(toggle.MouseButton1Click, function()
    setBlocked(not State.enabled)
end)

connect(closeBtn.MouseButton1Click, unload)

connect(UserInputService.InputBegan, function(input, gameProcessed)
    if gameProcessed then
        return
    end
    if input.KeyCode == Enum.KeyCode.RightShift then
        frame.Visible = not frame.Visible
    end
end)

refresh()