local isOpen = false
local cam = nil
local authDone = false

-- A slow drift over the city gives the glass something to sit on.
local CAM_POS   = vector3(-1030.0, -2730.0, 320.0)
local CAM_LOOK  = vector3(-75.0, -815.0, 220.0)
local SPAWN_POS = vector3(195.17, -889.36, 30.69)
local SPAWN_HDG = 145.0

local function startCamera()
  cam = CreateCamWithParams('DEFAULT_SCRIPTED_CAMERA',
    CAM_POS.x, CAM_POS.y, CAM_POS.z, 0.0, 0.0, 0.0, 55.0, false, 0)
  PointCamAtCoord(cam, CAM_LOOK.x, CAM_LOOK.y, CAM_LOOK.z)
  SetCamActive(cam, true)
  RenderScriptCams(true, false, 0, true, true)

  -- Drift the camera so the backdrop is never a frozen still.
  CreateThread(function()
    local angle = 0.0
    while cam and DoesCamExist(cam) and not authDone do
      angle = angle + 0.02
      local radius = 260.0
      SetCamCoord(cam,
        CAM_POS.x + math.cos(math.rad(angle)) * radius,
        CAM_POS.y + math.sin(math.rad(angle)) * radius,
        CAM_POS.z)
      PointCamAtCoord(cam, CAM_LOOK.x, CAM_LOOK.y, CAM_LOOK.z)
      Wait(20)
    end
  end)
end

local function stopCamera()
  if cam and DoesCamExist(cam) then
    RenderScriptCams(false, true, 900, true, true)
    DestroyCam(cam, false)
    cam = nil
  end
end

local function openAuth()
  isOpen = true
  SetNuiFocus(true, true)
  SendNUIMessage({ action = 'open' })
  DoScreenFadeIn(600)
end

local function closeAuth()
  isOpen = false
  SetNuiFocus(false, false)
  SendNUIMessage({ action = 'close' })
end

-- Keep the unauthenticated player parked and invisible behind the glass.
CreateThread(function()
  while not authDone do
    local ped = PlayerPedId()
    SetEntityVisible(ped, false, false)
    SetEntityCollision(ped, false, false)
    FreezeEntityPosition(ped, true)
    SetPlayerInvincible(PlayerId(), true)
    DisableAllControlActions(0)
    Wait(0)
  end
end)

-- Any map resource can re-enable auto spawn when it starts, so hold the gate
-- shut every time that happens until the player actually has an identity.
AddEventHandler('onClientMapStart', function()
  if not authDone then
    exports.spawnmanager:setAutoSpawn(false)
  end
end)

CreateThread(function()
  -- Take spawning away from spawnmanager until the player has an identity.
  exports.spawnmanager:setAutoSpawn(false)

  DoScreenFadeOut(0)
  while not NetworkIsSessionStarted() do Wait(100) end
  Wait(500)

  startCamera()
  openAuth()
end)

-- The account is known; fiverp-characters owns everything from here — the
-- slot screen, the appearance creator and the spawn itself. Auth only has to
-- fade out, release its camera and step aside.
local function enterCity()
  authDone = true
  closeAuth()
  DoScreenFadeOut(500)
  Wait(600)
  stopCamera()
  exports.spawnmanager:setAutoSpawn(false)
  TriggerEvent('fiverp-chars:begin')
end

-- ------------------------------------------------------------- NUI callbacks
RegisterNUICallback('registerAccount', function(data, cb)
  TriggerServerEvent('fiverp-auth:register:account', data)
  cb({})
end)

RegisterNUICallback('registerIdentity', function(data, cb)
  TriggerServerEvent('fiverp-auth:register:identity', data)
  cb({})
end)

RegisterNUICallback('resumeIdentity', function(data, cb)
  TriggerServerEvent('fiverp-auth:resume:identity', data)
  cb({})
end)

RegisterNUICallback('login', function(data, cb)
  TriggerServerEvent('fiverp-auth:login', data)
  cb({})
end)

-- --------------------------------------------------------------- server said
RegisterNetEvent('fiverp-auth:register:accountResult', function(result)
  SendNUIMessage({ action = 'accountResult', payload = result })
end)

RegisterNetEvent('fiverp-auth:register:identityResult', function(result)
  SendNUIMessage({ action = 'identityResult', payload = result })
  if result.ok then
    CreateThread(function()
      Wait(1600) -- let the permit finish stamping before the fade
      enterCity(result.firstName, result.lastName)
    end)
  end
end)

RegisterNetEvent('fiverp-auth:loginResult', function(result)
  SendNUIMessage({ action = 'loginResult', payload = result })
  if result.ok and not result.needsIdentity then
    CreateThread(function()
      Wait(1200)
      enterCity(result.firstName, result.lastName)
    end)
  end
end)