-- Nameplates.lua
local _;
local next = next;
local GetNamePlateForUnit = C_NamePlate.GetNamePlateForUnit;
local UnitExists = UnitExists;
local UnitAura = UnitAura;

local main = CreateFrame("Frame", "OmaNameplateAuras");
main:Hide();

local frames = {};
local unique = 1;
local function createNameplate(parent)
    local name = format("OmaPlate%i", unique);
    local frame = CreateFrame("Frame", name, parent);
    frames[parent] = frame;
    unique = unique + 1;
    frame:SetPoint("BOTTOM", parent, "TOP", 0, 14);
    frame:SetWidth(32);
    frame:SetHeight(32);
    frame:Hide();
    frame.base = frame:CreateTexture(nil, "BACKGROUND");
    frame.base:SetAllPoints();
    frame.base:SetColorTexture(0, 0, 0, 0.6);
    frame.icon = frame:CreateTexture(nil, "ARTWORK");
    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.cd = CreateFrame("Cooldown", format("%sCD", name), frame, "CooldownFrameTemplate");
    frame.cd:SetReverse(true);
    frame.cd:SetHideCountdownNumbers(true);
    frame.cd:SetAllPoints();
    return frame;
end

local function setNameplate(unit)
    local frame = frames[GetNamePlateForUnit(unit)];
    -- TODO register interesting events to track on nameplates
end

local function unsetNameplate(unit)
    local frame = frames[GetNamePlateForUnit(unit)];
    frame:UnregisterAllEvents();
    frame:Hide();
end

local events = {
    ["NAME_PLATE_CREATED"] = createNameplate,
    ["NAME_PLATE_UNIT_ADDED"] = setNameplate,
    ["NAME_PLATE_UNIT_REMOVED"] = unsetNameplate,
};
main:SetScript("OnEvent", function(self, event)
    main:UnregisterAllEvents();
    main:SetScript("OnEvent", function(self, event, arg1)
        events[event](arg1);
    end);
    main:RegisterEvent("NAME_PLATE_CREATED");
    main:RegisterEvent("NAME_PLATE_UNIT_ADDED");
    main:RegisterEvent("NAME_PLATE_UNIT_REMOVED");
end);
main:RegisterEvent("PLAYER_LOGIN");