--all gray text like this are comments and do not run as code
--build the settings and basic functions for the hook

function (self, unitId, unitFrame, envTable)

    --declare setting variables:
    local textColor = "white";
    local textSize = 12;

    local showInRaid = true;
    local showInDungeon = true;
    local showInArena = false;
    local showInBattleground = false;
    local showInOpenWorld = true;

    envTable.UpdateInterval = 2; --each 2 updates in the nameplate it'll update the amount of targets

    local anchor = {
        side = 6, --1 = topleft 2 = left 3 = bottomleft 4 = bottom 5 = bottom right 6 = right 7 = topright 8 = top
        x = -20, --x offset
        y = 12, --y offset
    };


    ---------------------------------------------------------------------------------------------------------------------------------------------


    --frames:

    --create the text that will show the amount of people targeting the unit
    if (not  unitFrame.healthBar.TargetAmount) then
        envTable.TargetAmount = Plater:CreateLabel (unitFrame.healthBar, "", textSize, textColor);
        Plater.SetAnchor (envTable.TargetAmount, anchor);
        unitFrame.healthBar.TargetAmount = envTable.TargetAmount
    end

    --in case Plater wipes the envTable
    envTable.TargetAmount = unitFrame.healthBar.TargetAmount

    ---------------------------------------------------------------------------------------------------------------------------------------------
    --private variables (they will be used in the other scripts within this hook)
    envTable.CanShow = false;
    envTable.UpdateCooldown = 0;
    envTable.InRaid = false;
    envTable.InParty = false;

    ---------------------------------------------------------------------------------------------------------------------------------------------
    --functions

    --update the InRaid or InParty proprieties
    function envTable.UpdateGroupType()
        if (IsInRaid()) then
            envTable.InRaid = true;
            envTable.InParty = false;

        elseif (IsInGroup()) then
            envTable.InRaid = false;
            envTable.InParty = true;

        else
            envTable.InRaid = false;
            envTable.InParty = false;
        end
    end

    --this function controls if the amount of targets can show following the settings in the top of this script
    function envTable.CanShowTargetAmount()

        local _, instanceType, difficultyID, _, _, _, _, instanceMapID, instanceGroupSize = GetInstanceInfo()

        if (showInRaid and instanceType == "raid") then
            envTable.UpdateGroupType()
            return true
        end

        if (showInDungeon and instanceType == "party") then
            envTable.UpdateGroupType()
            return true
        end

        if (showInArena and instanceType == "arena") then
            envTable.UpdateGroupType()
            return true
        end

        if (showInBattleground and instanceType == "pvp") then
            envTable.UpdateGroupType()
            return true
        end

        if (showInOpenWorld and instanceType == "none") then
            envTable.UpdateGroupType()
            if (envTable.InRaid or envTable.InParty) then
                return true
            end
        end

        return false
    end

    --get the amount of player targetting the unit in raid or party
    function envTable.NumTargetsInRaid (unitFrame)
        local amount = 0
        for i = 1, GetNumGroupMembers() do
            local unit = "raid" .. i .. "target"
            if (UnitGUID (unit) == unitFrame.namePlateUnitGUID) then
                amount = amount + 1
            end
        end

        return amount
    end

    function envTable.NumTargetsInParty()
        local amount = 0
        for i = 1, GetNumGroupMembers() - 1 do
            local unit = "party" .. i .. "target"
            if (UnitGUID (unit) == unitFrame.namePlateUnitGUID) then
                amount = amount + 1
            end
        end

        local unit = "playertarget"
        if (UnitGUID (unit) == unitFrame.namePlateUnitGUID) then
            amount = amount + 1
        end

        return amount
    end

end