-- Compatible with most executors: Synapse X, KRNL, Fluxus, etc.

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local Workspace = game:GetService("Workspace")
local HttpService = game:GetService("HttpService")

local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local rootPart = character:WaitForChild("HumanoidRootPart")

-- Configuration
local FLY_SPEED = 100
local ANTI_DETECT = true

-- State
local flying = false
local flyConnection = nil
local bodyVelocity = nil
local bodyGyro = nil
local control = {F = 0, B = 0, L = 0, R = 0, U = 0, D = 0}

-- Anti-cheat bypass: Spoof velocity checks
local function spoofPhysics()
    if not ANTI_DETECT then return end
    
    local mt = getrawmetatable(game)
    local oldIndex = mt.__index
    setreadonly(mt, false)
    
    mt.__index = newcclosure(function(t, k)
        if t == rootPart and k == "Velocity" then
            return Vector3.new(0, 0, 0)
        end
        if t == rootPart and k == "RotVelocity" then
            return Vector3.new(0, 0, 0)
        end
        return oldIndex(t, k)
    end)
    
    setreadonly(mt, true)
end

-- Anti-cheat bypass: Network ownership
local function claimNetworkOwnership()
    if not ANTI_DETECT then return end
    
    for _, part in pairs(character:GetDescendants()) do
        if part:IsA("BasePart") then
            pcall(function()
                part:SetNetworkOwner(player)
            end)
        end
    end
end

-- Create flight physics
local function createFlightPhysics()
    bodyVelocity = Instance.new("BodyVelocity")
    bodyVelocity.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
    bodyVelocity.Velocity = Vector3.new(0, 0, 0)
    bodyVelocity.P = 1250
    bodyVelocity.Parent = rootPart
    
    bodyGyro = Instance.new("BodyGyro")
    bodyGyro.MaxTorque = Vector3.new(math.huge, math.huge, math.huge)
    bodyGyro.P = 5000
    bodyGyro.D = 100
    bodyGyro.Parent = rootPart
    
    if ANTI_DETECT then
        bodyVelocity.Name = HttpService:GenerateGUID(false):sub(1, 8)
        bodyGyro.Name = HttpService:GenerateGUID(false):sub(1, 8)
    end
end

-- Destroy flight physics
local function destroyFlightPhysics()
    if bodyVelocity then
        bodyVelocity:Destroy()
        bodyVelocity = nil
    end
    if bodyGyro then
        bodyGyro:Destroy()
        bodyGyro = nil
    end
end

-- Calculate movement direction
local function getMovementDirection()
    local camera = Workspace.CurrentCamera
    local moveDirection = Vector3.new(0, 0, 0)
    
    if control.F > 0 then
        moveDirection = moveDirection + camera.CFrame.LookVector
    end
    if control.B > 0 then
        moveDirection = moveDirection - camera.CFrame.LookVector
    end
    if control.L > 0 then
        moveDirection = moveDirection - camera.CFrame.RightVector
    end
    if control.R > 0 then
        moveDirection = moveDirection + camera.CFrame.RightVector
    end
    if control.U > 0 then
        moveDirection = moveDirection + Vector3.new(0, 1, 0)
    end
    if control.D > 0 then
        moveDirection = moveDirection - Vector3.new(0, 1, 0)
    end
    
    if moveDirection.Magnitude > 0 then
        moveDirection = moveDirection.Unit * FLY_SPEED
    end
    
    return moveDirection
end

-- Start flying
function startFly()
    if flying then return end
    flying = true
    
    spoofPhysics()
    claimNetworkOwnership()
    
    humanoid:SetStateEnabled(Enum.HumanoidStateType.FallingDown, false)
    humanoid:SetStateEnabled(Enum.HumanoidStateType.Ragdoll, false)
    humanoid.PlatformStand = true
    
    createFlightPhysics()
    
    flyConnection = RunService.Heartbeat:Connect(function()
        if not flying then return end
        
        local direction = getMovementDirection()
        
        if ANTI_DETECT then
            local jitter = Vector3.new(
                math.random(-10, 10) / 100,
                math.random(-10, 10) / 100,
                math.random(-10, 10) / 100
            )
            direction = direction + jitter
        end
        
        if bodyVelocity then
            bodyVelocity.Velocity = direction
        end
        if bodyGyro then
            bodyGyro.CFrame = Workspace.CurrentCamera.CFrame
        end
        
        if ANTI_DETECT and math.random(1, 60) == 1 then
            pcall(function()
                local spoof = rootPart.CFrame
                rootPart.CFrame = spoof
            end)
        end
    end)
end

-- Stop flying
function stopFly()
    if not flying then return end
    flying = false
    
    if flyConnection then
        flyConnection:Disconnect()
        flyConnection = nil
    end
    
    destroyFlightPhysics()
    
    humanoid.PlatformStand = false
    humanoid:SetStateEnabled(Enum.HumanoidStateType.FallingDown, true)
    humanoid:SetStateEnabled(Enum.HumanoidStateType.Ragdoll, true)
end

-- Toggle fly
function toggleFly()
    if flying then
        stopFly()
    else
        startFly()
    end
end

-- Input handling
UserInputService.InputBegan:Connect(function(input, gameProcessed)
    if gameProcessed then return end
    
    if input.KeyCode == Enum.KeyCode.F then
        toggleFly()
    elseif input.KeyCode == Enum.KeyCode.W then
        control.F = 1
    elseif input.KeyCode == Enum.KeyCode.S then
        control.B = 1
    elseif input.KeyCode == Enum.KeyCode.A then
        control.L = 1
    elseif input.KeyCode == Enum.KeyCode.D then
        control.R = 1
    elseif input.KeyCode == Enum.KeyCode.Space then
        control.U = 1
    elseif input.KeyCode == Enum.KeyCode.LeftShift then
        control.D = 1
    end
end)

UserInputService.InputEnded:Connect(function(input)
    if input.KeyCode == Enum.KeyCode.W then
        control.F = 0
    elseif input.KeyCode == Enum.KeyCode.S then
        control.B = 0
    elseif input.KeyCode == Enum.KeyCode.A then
        control.L = 0
    elseif input.KeyCode == Enum.KeyCode.D then
        control.R = 0
    elseif input.KeyCode == Enum.KeyCode.Space then
        control.U = 0
    elseif input.KeyCode == Enum.KeyCode.LeftShift then
        control.D = 0
    end
end)

-- Handle respawn
player.CharacterAdded:Connect(function(newChar)
    character = newChar
    humanoid = newChar:WaitForChild("Humanoid")
    rootPart = newChar:WaitForChild("HumanoidRootPart")
    
    if flying then
        stopFly()
        task.wait(0.5)
        startFly()
    end
end)

print("=== Modern Fly Script Loaded ===")
print("Press F to toggle fly")
print("WASD to move, Space to go up, LeftShift to go down")
print("Anti-cheat bypass: " .. (ANTI_DETECT and "ENABLED" or "DISABLED"))