-- JustRP — Client-side core
-- Manages NUI screens, cameras, spawning and position sync

local inSession  = false
local charLoaded = false
local camHandle  = nil
local saveTimer  = 0

-- ─── NUI helper ─────────────────────────────────────────────────────────────

local function nuiMsg(action, data)
    SendNUIMessage({ action = action, data = data or {} })
end

-- ─── On resource start (loading screen is already showing) ──────────────────

AddEventHandler("onClientMapStart", function()
    Wait(1500)  -- give the game a moment to settle
    TriggerServerEvent("justrp:clientReady")
end)

-- ─── Session start from server ───────────────────────────────────────────────

RegisterNetEvent("justrp:startSession")
AddEventHandler("justrp:startSession", function()
    -- Freeze world while auth is happening
    SetEntityVisible(PlayerPedId(), false, false)
    FreezeEntityPosition(PlayerPedId(), true)
    DisplayHud(false)
    DisplayRadar(false)

    -- Shut loading screen, then show auth UI
    Wait(800)
    ShutdownLoadingScreenNui()
    Wait(300)

    SetNuiFocus(true, true)
    nuiMsg("showAuth")
    inSession = true
end)

-- ─── Auth results ────────────────────────────────────────────────────────────

RegisterNetEvent("justrp:auth:ok")
AddEventHandler("justrp:auth:ok", function(accountId, username)
    nuiMsg("authOk", { accountId = accountId, username = username })
    TriggerServerEvent("justrp:chars:load")
end)

RegisterNetEvent("justrp:auth:fail")
AddEventHandler("justrp:auth:fail", function(err)
    nuiMsg("authFail", { error = err })
end)

-- ─── Character list from server ──────────────────────────────────────────────

RegisterNetEvent("justrp:chars:list")
AddEventHandler("justrp:chars:list", function(chars)
    nuiMsg("showChars", { characters = chars })
end)

-- ─── Character creation result ───────────────────────────────────────────────

RegisterNetEvent("justrp:char:created")
AddEventHandler("justrp:char:created", function(charId)
    -- Reload character list so the new one shows
    TriggerServerEvent("justrp:chars:load")
end)

RegisterNetEvent("justrp:char:createFail")
AddEventHandler("justrp:char:createFail", function(err)
    nuiMsg("charCreateFail", { error = err })
end)

-- ─── Character selected → load appearance ────────────────────────────────────

RegisterNetEvent("justrp:char:loaded")
AddEventHandler("justrp:char:loaded", function(ch)
    -- Apply appearance to player ped
    local ped = PlayerPedId()
    local model = ch.gender == 1 and GetHashKey("mp_f_freemode_01") or GetHashKey("mp_m_freemode_01")

    RequestModel(model)
    while not HasModelLoaded(model) do Wait(10) end
    SetPlayerModel(PlayerId(), model)
    SetModelAsNoLongerNeeded(model)

    ped = PlayerPedId()

    -- Face blend
    SetPedHeadBlendData(
        ped,
        math.floor(ch.face_blend * 45), math.floor(ch.face_blend * 45),
        0,
        math.floor(ch.face_blend * 45), math.floor(ch.face_blend * 45),
        0,
        ch.face_blend, ch.face_blend, 0.0, false
    )

    -- Skin overlay (skin tone)
    SetPedMicroblendData(ped, ch.skin_tone, ch.skin_tone, ch.skin_tone)

    -- Eyes
    SetPedEyeColor(ped, ch.eye_color)

    -- Hair
    SetPedComponentVariation(ped, 2, ch.hair_style, 0, 2)
    SetPedHairColor(ped, ch.hair_color, 0)

    -- Body shape
    SetPedFaceFeature(ped, 16, (ch.body_weight - 0.5) * 2)  -- body weight feature

    -- Outfit
    SetPedComponentVariation(ped, 11, ch.outfit_top,   0, 2)
    SetPedComponentVariation(ped, 4,  ch.outfit_pants, 0, 2)
    SetPedComponentVariation(ped, 6,  ch.outfit_shoes, 0, 2)

    -- Tell NUI to show spawn screen
    nuiMsg("showSpawn", {
        name = ch.firstname .. " " .. ch.lastname,
    })
end)

-- ─── Spawn ───────────────────────────────────────────────────────────────────

RegisterNetEvent("justrp:spawn:go")
AddEventHandler("justrp:spawn:go", function(pos)
    local ped = PlayerPedId()

    -- Teleport to position and unfreeze
    SetEntityCoords(ped, pos.x, pos.y, pos.z, false, false, false, true)
    SetEntityHeading(ped, pos.h)

    -- Cinematic camera fly-down
    local camX = pos.x + math.sin(math.rad(pos.h)) * 200
    local camY = pos.y + math.cos(math.rad(pos.h)) * 200
    camHandle = CreateCameraWithParams(
        "DEFAULT_SCRIPTED_CAMERA",
        camX, camY, pos.z + 180,
        0.0, 0.0, 0.0,
        60.0, false, 0
    )
    SetCamActive(camHandle, true)
    RenderScriptCams(true, true, 1000, true, true)

    -- Animate camera flying down to player
    local steps = 80
    Citizen.CreateThread(function()
        for i = 1, steps do
            local t = i / steps
            local ease = 1 - math.pow(1 - t, 3)  -- ease out cubic

            local cx = camX + (pos.x - camX) * ease
            local cy = camY + (pos.y - camY) * ease
            local cz = (pos.z + 180) + ((pos.z + 2) - (pos.z + 180)) * ease

            SetCamCoord(camHandle, cx, cy, cz)
            PointCamAtCoord(camHandle, pos.x, pos.y, pos.z)
            Wait(16)
        end

        -- Transition back to player cam
        RenderScriptCams(false, true, 1200, true, true)
        Wait(1300)
        DestroyCam(camHandle, false)
        camHandle = nil

        -- Reveal player
        SetEntityVisible(ped, true, false)
        FreezeEntityPosition(ped, false)
        DisplayHud(true)
        DisplayRadar(true)
        SetNuiFocus(false, false)
        nuiMsg("hide")
        charLoaded = true
    end)
end)

-- ─── NUI Callbacks ───────────────────────────────────────────────────────────

-- Auth
RegisterNUICallback("authRegister", function(data, cb)
    TriggerServerEvent("justrp:auth:register", data.username, data.password)
    cb("ok")
end)

RegisterNUICallback("authLogin", function(data, cb)
    TriggerServerEvent("justrp:auth:login", data.username, data.password)
    cb("ok")
end)

-- Character management
RegisterNUICallback("charSelect", function(data, cb)
    TriggerServerEvent("justrp:char:select", tonumber(data.id))
    cb("ok")
end)

RegisterNUICallback("charCreate", function(data, cb)
    TriggerServerEvent("justrp:char:create", data)
    cb("ok")
end)

-- Spawn selection
RegisterNUICallback("spawnRequest", function(data, cb)
    TriggerServerEvent("justrp:spawn:request", data.location)
    cb("ok")
end)

-- Character creation — camera rotation control
RegisterNUICallback("rotateCam", function(data, cb)
    if camHandle then
        -- data.delta is horizontal rotation amount
        local heading = GetEntityHeading(PlayerPedId())
        SetEntityHeading(PlayerPedId(), heading - (data.delta or 0) * 0.4)
    end
    cb("ok")
end)

-- ─── Character creation preview camera ───────────────────────────────────────

local charCamActive = false
local charCamAngle  = 0.0

RegisterNUICallback("startCharCam", function(data, cb)
    if charCamActive then
        cb("ok")
        return
    end
    charCamActive = true
    local ped = PlayerPedId()
    SetEntityVisible(ped, true, false)

    camHandle = CreateCamera("DEFAULT_SCRIPTED_CAMERA", false)
    SetCamActive(camHandle, true)
    RenderScriptCams(true, false, 0, true, true)

    Citizen.CreateThread(function()
        while charCamActive do
            local pedPos = GetEntityCoords(ped)
            local angle  = charCamAngle
            local dist   = 1.6
            local cx     = pedPos.x + math.sin(math.rad(angle)) * dist
            local cy     = pedPos.y - math.cos(math.rad(angle)) * dist
            local cz     = pedPos.z + 0.7

            SetCamCoord(camHandle, cx, cy, cz)
            PointCamAtCoord(camHandle, pedPos.x, pedPos.y, pedPos.z + 0.7)
            charCamAngle = charCamAngle + 0.15  -- slow auto-orbit

            Wait(16)
        end
    end)

    cb("ok")
end)

RegisterNUICallback("stopCharCam", function(data, cb)
    charCamActive = false
    if camHandle then
        RenderScriptCams(false, true, 600, true, true)
        Wait(700)
        DestroyCam(camHandle, false)
        camHandle = nil
    end
    cb("ok")
end)

RegisterNUICallback("charCamDrag", function(data, cb)
    charCamAngle = charCamAngle + (data.delta or 0) * 0.5
    charCamActive = true  -- stop auto-orbit briefly
    cb("ok")
end)

-- Apply live appearance updates during char creation
RegisterNUICallback("applyAppearance", function(data, cb)
    local ped = PlayerPedId()

    if data.gender ~= nil then
        local model = data.gender == 1
            and GetHashKey("mp_f_freemode_01")
            or  GetHashKey("mp_m_freemode_01")
        if not HasModelLoaded(model) then
            RequestModel(model)
            while not HasModelLoaded(model) do Wait(10) end
        end
        SetPlayerModel(PlayerId(), model)
        SetModelAsNoLongerNeeded(model)
        ped = PlayerPedId()
    end

    if data.face_blend ~= nil then
        SetPedHeadBlendData(
            ped,
            math.floor(data.face_blend * 45),
            math.floor(data.face_blend * 45),
            0,
            math.floor(data.face_blend * 45),
            math.floor(data.face_blend * 45),
            0,
            data.face_blend, data.face_blend, 0.0, false
        )
    end
    if data.skin_tone ~= nil then
        SetPedMicroblendData(ped, data.skin_tone, data.skin_tone, data.skin_tone)
    end
    if data.eye_color ~= nil then
        SetPedEyeColor(ped, data.eye_color)
    end
    if data.hair_style ~= nil or data.hair_color ~= nil then
        SetPedComponentVariation(ped, 2, data.hair_style or 0, 0, 2)
        SetPedHairColor(ped, data.hair_color or 0, 0)
    end
    if data.body_weight ~= nil then
        SetPedFaceFeature(ped, 16, (data.body_weight - 0.5) * 2)
    end
    if data.outfit_top ~= nil then
        SetPedComponentVariation(ped, 11, data.outfit_top, 0, 2)
    end
    if data.outfit_pants ~= nil then
        SetPedComponentVariation(ped, 4, data.outfit_pants, 0, 2)
    end
    if data.outfit_shoes ~= nil then
        SetPedComponentVariation(ped, 6, data.outfit_shoes, 0, 2)
    end

    cb("ok")
end)

-- ─── Position auto-save ───────────────────────────────────────────────────────

Citizen.CreateThread(function()
    while true do
        Wait(60000)
        if charLoaded then
            local ped = PlayerPedId()
            local pos = GetEntityCoords(ped)
            local hdg = GetEntityHeading(ped)
            TriggerServerEvent("justrp:savePosition", pos.x, pos.y, pos.z, hdg)
        end
    end
end)

print("[JustRP] Client core loaded.")