local fakeFirstPerson = false
local rat = nil
local cam = nil
local lastY = 1.0
local offX = 1.0
local offY = 1.0
local YADD = 0.0

RegisterCommand(commandName, function(source, args, rawCommand)
    if not fakeFirstPerson then
        SetFollowPedCamViewMode(1)
        SetFollowVehicleCamViewMode(1)
        fakeFirstPerson = true
    else
        SetFollowPedCamViewMode(0)
        SetFollowVehicleCamViewMode(0)
        fakeFirstPerson = false
    end
end)

RegisterNetEvent('setRatInvisible')
AddEventHandler('setRatInvisible', function(netid)
    if (NetworkDoesEntityExistWithNetworkId(netid)) then
        local thisRat = NetworkGetEntityFromNetworkId(netid)
        SetEntityInvincible(thisRat, true)
        SetEntityCollision(thisRat, false, false)
        SetEntityVisible(thisRat, false, 0)
    end
end)

Citizen.CreateThread(function()
    while true do
        if fakeFirstPerson then
            local ped = GetPlayerPed(-1)
            if cam == nil then
                local hash = GetHashKey("a_c_rat")
                while not HasModelLoaded(hash) do
                    RequestModel(hash)
                    Wait(20)
                end
                rat = CreatePed("PED_TYPE_ANIMAL", hash, 0, 0, 0, 0, true, true)
                AttachEntityToEntity(rat, GetPlayerPed(-1), GetPedBoneIndex(GetPlayerPed(-1), 31086), 0.2, 0.04, 0, 0, 270.0, 60.0, true, true, false, true, 1, true)
                SetEntityInvincible(rat, true)
                SetEntityCollision(rat, false, false)
                SetEntityVisible(rat, false, 0)
                TriggerServerEvent("makeRatInvisible", NetworkGetNetworkIdFromEntity(rat))
                cam = CreateCam("DEFAULT_SCRIPTED_CAMERA", true)
                local bone = GetPedBoneIndex(ped, 12844)
                SetCamFov(cam, camFOV)
                AttachCamToEntity(cam, rat, camOffsetX, camOffsetY, camOffsetZ, true)
                RenderScriptCams(true, false, 0, 1, 0)
                SetCamNearClip(cam, 0.09)
            end
            SetEntityInvincible(rat, true)
            SetEntityCollision(rat, false, false)
            SetEntityVisible(rat, false, 0)
            CheckInputRotation()
            local bx = GetEntityRotation(rat)
            local b = GetEntityRotation(ped)
            local zAdd = (offY - lastY)
            if IsPlayerFreeAiming(PlayerId()) then
                if YADD <= (offX / 2) * -1 - 0.5 then
                    YADD = YADD + 0.5
                elseif YADD >= (offX / 2) * -1 + 0.5 then
                    YADD = YADD - 0.5
                end
            elseif IsPedSprinting(PlayerPedId()) then
                if YADD >= 12.5 then
                    YADD = YADD - 0.5
                elseif YADD <= 11.5 then
                    YADD = YADD + 0.5
                end
            elseif IsPedWalking(PlayerPedId()) then
                if YADD >= 3.5 then
                    YADD = YADD - 0.5
                elseif YADD <= 2.5 then
                    YADD = YADD + 0.5
                end
            else
                if YADD >= 0.5 then
                    YADD = YADD - 0.5
                elseif YADD <= -0.5 then
                    YADD = YADD + 0.5
                end
            end
            if GetVehiclePedIsIn(ped, false) == 0 then
                SetCamRot(cam, bx.x + offX - 180.0, bx.y - YADD - 5.0, b.z + zAdd, 2)
                SetEntityHeading(PlayerPedId(), b.z + zAdd)
                SetEntityRotation(
                        PlayerPedId(), --[[ Entity ]]
                        b.x, -- + offX --[[ number ]],
                        b.y, -- YADD - 5.0 --[[ number ]],
                        b.z + zAdd, --[[ number ]]
                        2 --[[ integer ]],
                        true --[[ boolean ]]
                )
                SetGameplayCamRelativeRotation(
                        b.x, -- + offX --[[ number ]],
                        b.y, -- YADD - 5.0 --[[ number ]],
                        b.z + zAdd --[[ number ]]
                )
            else
                if IsControlPressed(0, 26) then
                    AttachCamToEntity(cam, rat, reverseCamOffsetX, reverseCamOffsetY, reverseCamOffsetZ, true)
                    SetCamRot(cam, bx.x + offX - 180.0, bx.y - YADD - 5.0, b.z + offY + 180.0, 2)
                else
                    AttachCamToEntity(cam, rat, camOffsetX, camOffsetY, camOffsetZ, true)
                    SetCamRot(cam, bx.x + offX - 180.0, bx.y - YADD - 5.0, b.z + offY, 2)
                end
            end
            lastY = offY
        else
            if cam ~= nil then
                RenderScriptCams(false, false, 0, 1, 0)
                DestroyCam(cam, true)
                TriggerServerEvent("deleteRat", NetworkGetNetworkIdFromEntity(rat))
                DeleteEntity(rat)
                rat = nil
                cam = nil
            end
        end
        Wait(0)
    end
end)

function CheckInputRotation()
    local rightAxisX = GetDisabledControlNormal(0, 220)
    local rightAxisY = GetDisabledControlNormal(0, 221)
    offX = offX + rightAxisY * -5
    offY = offY + rightAxisX * -5
    if (offX > 70.0) then
        offX = 70.0
    elseif (offX < -70.0) then
        offX = -70.0
    end
    if (GetVehiclePedIsIn(PlayerPedId(), false) ~= 0) then
        if (offY > 60.0) then
            offY = 60.0
        elseif (offY < -60.0) then
            offY = -60.0
        end
    end
end