ABarr Single Phase Warning

function()
    local Mana=UnitPower("player",SPELL_POWER_MANA)
    local ManaMax=UnitPowerMax("player",SPELL_POWER_MANA)
    local ManaPercent=Mana/ManaMax

    local ArcaneCharges=UnitPower("player", SPELL_POWER_ARCANE_CHARGES)

    local EvocCD=0
    local start,duration,enable=GetSpellCooldown(12051)
    if start~=0 then EvocCD=duration-GetTime()+start end

    local HasBuff=function(BuffName)
        return UnitBuff("player",BuffName)~=nil
    end

    return (ArcaneCharges == 4
        and (Mana / ManaMax) < (1.25 * EvocCD / 90)
        and (Mana / ManaMax) < 0.75
        and HasBuff("Arcane Power") == false
        and HasBuff("Rune of Power") == false)
end