-- Bres.lua
local _;
local min, ceil = math.min, math.ceil;
local GetSpellCharges = GetSpellCharges;
local GetTime = GetTime;
local CTimerAfter = C_Timer.After;

local frame = CreateFrame("Frame", "OmaBres", UIParent);

local function tick()
    local charges, maxCharges, start, duration = GetSpellCharges(20484); -- Rebirth
    if charges then
        frame:Show();
        local remain = duration - (GetTime() - start);
        frame.charge:SetText(charges);
        frame.cd:SetCooldown(start, duration);
        CTimerAfter(min(ceil(remain), 5), tick);
    else
        frame:Hide();
        CTimerAfter(5, tick);
    end
end

local function bres()
    frame:SetPoint("BOTTOMLEFT", UIParent, "BOTTOMLEFT", 580, 0);
    frame:SetWidth(48);
    frame:SetHeight(48);
    frame.base = frame:CreateTexture(nil, "BACKGROUND");
    frame.base:SetAllPoints();
    frame.base:SetColorTexture(0, 0, 0, 0.5);
    frame.icon = frame:CreateTexture(nil, "BORDER");
    frame.icon:SetPoint("TOPLEFT", frame.base, "TOPLEFT", 1, -1);
    frame.icon:SetPoint("BOTTOMRIGHT", frame.base, "BOTTOMRIGHT", -1, 1);
    frame.icon:SetTexCoord(0.07, 0.93, 0.07, 0.93);
    frame.icon:SetTexture(136080); -- Rebirth
    frame.charge = frame:CreateFontString(nil, "OVERLAY", "NumberFontNormalLarge");
    frame.charge:SetPoint("BOTTOMRIGHT");
    frame.cd = CreateFrame("Cooldown", "OmaBresCD", frame, "CooldownFrameTemplate");
    frame.cd:SetAllPoints();
    frame:UnregisterAllEvents();
    tick();
end

frame:SetScript("OnEvent", function(self, event)
    return bres();
end);
frame:RegisterEvent("PLAYER_LOGIN");