-- optimizations
local vec = vec
local Wait = Citizen.Wait
local format = string.format
local RemoveBlip = RemoveBlip
local PlayerPedId = PlayerPedId
local IsHudHidden = IsHudHidden
local SetTextFont = SetTextFont
local SetTextScale = SetTextScale
local SetTextOutline = SetTextOutline
local GetEntityCoords = GetEntityCoords
local EndTextCommandDisplayText = EndTextCommandDisplayText
local BeginTextCommandDisplayText = BeginTextCommandDisplayText
local AddTextComponentSubstringPlayerName = AddTextComponentSubstringPlayerName
-- end optimizations

local nearestPostalText = ""

-- recalculate current postal
Citizen.CreateThread(function()
    -- wait for postals to load
    while postals == nil do Wait(1) end

    local delay = math.max(config.updateDelay and tonumber(config.updateDelay) or 300, 50)
    if not delay or tonumber(delay) <= 0 then
        error("Invalid render delay provided, it must be a number > 0")
    end

    local postals = postals
    local deleteDist = config.blip.distToDelete
    local formatTemplate = config.text.format
    local _total = #postals

    while true do
        local coords = GetEntityCoords(PlayerPedId())
        local _nearestIndex, _nearestD
        coords = vec(coords[1], coords[2])

        for i = 1, _total do
            local D = #(coords - postals[i][1])
            if not _nearestD or D < _nearestD then
                _nearestIndex = i
                _nearestD = D
            end
        end

        if pBlip and #(pBlip.p[1] - coords) < deleteDist then
            TriggerEvent('chat:addMessage', {
                color = { 255, 0, 0 },
                args = {
                    'Postals',
                    "You've reached your postal destination!"
                }
            })
            RemoveBlip(pBlip.hndl)
            pBlip = nil
        end

        local _code = postals[_nearestIndex].code
        nearest = { code = _code, dist = _nearestD }
        nearestPostalText = format(formatTemplate, _code, _nearestD)
        Wait(delay)
    end
end)

-- text display thread
Citizen.CreateThread(function()
    local posX = config.text.posX
    local posY = config.text.posY
    local _string = "STRING"
    local _scale = 0.42
    local _font = 4
    while true do
        if nearest and not IsHudHidden() then
            SetTextScale(_scale, _scale)
            SetTextFont(_font)
            SetTextOutline()
            BeginTextCommandDisplayText(_string)
            AddTextComponentSubstringPlayerName(nearestPostalText)
            EndTextCommandDisplayText(posX, posY)
        end
        Wait(0)
    end
end)