-- TargetFrame.lua
local _;
local unpack, pairs = unpack, pairs;
local format = string.format;
local GameTooltip = GameTooltip;
local GameTooltip_SetDefaultAnchor = GameTooltip_SetDefaultAnchor;

local registerUnitEvents = OmaUFEvents.RegisterUnitEvents;
local registerCastEvents = OmaUFCastBar.RegisterCastEvents;
local unregisterCastEvents = OmaUFCastBar.UnregisterCastEvents;
local unitEvent = OmaUFEvents.UnitEvent;
local createAuraFrame = OmaUFAuras.CreateAuraFrame;

local Settings = OmaUFSettings;
local baseColor = Settings.BaseColor;
local bgColor = Settings.BgColor;
local healthColor = Settings.HealthColor;
local shieldColor = Settings.ShieldColor;
local shieldhlColor = Settings.ShieldhlColor;
local healpredColor = Settings.HealpredColor;
local healabsorbColor = Settings.HealabsorbColor;
local width, height = Settings.Target.Width, Settings.Target.Height;
local anchorX, anchorY = Settings.Target.AnchorX, Settings.Target.AnchorY;
-- placeholders with visible values when error happens
local attributes = {};

local inheritedFrames = "SecureUnitButtonTemplate,SecureHandlerStateTemplate";
local barTexture = "Interface\\AddOns\\OmaRF\\images\\minimalist";

local function frameShow(frame)
    frame:RegisterEvent("GROUP_ROSTER_UPDATE");
    frame:RegisterEvent("PLAYER_ENTERING_WORLD");
    frame:RegisterEvent("PLAYER_TARGET_CHANGED");
    frame:RegisterEvent("PARTY_LEADER_CHANGED");
    frame:RegisterUnitEvent("UNIT_LEVEL", frame.unit);
    registerUnitEvents(frame);
    registerCastEvents(frame.castbar);
    unitEvent(frame, "UPDATE_ALL_BARS");
end

local function frameHide(frame)
    frame:UnregisterAllEvents();
    unregisterCastEvents(frame.castbar);
end

local function showTooltip(secure)
    GameTooltip_SetDefaultAnchor(GameTooltip, secure);
    GameTooltip:SetUnit(secure:GetAttribute("unit"));
end

local function hideTooltip(secure)
    GameTooltip:FadeOut();
end

function OmaUnitFrames.UpdateTargetTooltips()
    GameTooltip = _G["GameTooltip"];
    GameTooltip_SetDefaultAnchor = _G["GameTooltip_SetDefaultAnchor"];
end

function OmaUnitFrames.InitializeTarget(parent)
    attributes = Settings.Character.Clickheal;

    local secure = CreateFrame("Button", "OmaTargetSecure", parent, inheritedFrames);
    local frame = CreateFrame("Frame", "OmaTarget", parent);
    local unit = "target";
    secure:SetPoint("CENTER", parent, "CENTER", anchorX, anchorY);
    secure:SetAttribute("unit", unit);
    frame:SetPoint("CENTER", parent, "CENTER", anchorX, anchorY);
    frame:SetAttribute("unit", unit);
    frame.unit = unit;
    frame.displayed = unit;
    -- hide frame to get initial frameShow call
    frame:Hide();
    -- create visuals
    secure:SetWidth(width+2);
    secure:SetHeight(height+2);
    frame:SetWidth(width+2);
    frame:SetHeight(height+2);
    frame.width = width;
    frame.base = frame:CreateTexture(nil, "BACKGROUND");
    frame.base:SetAllPoints();
    frame.base:SetColorTexture(1, 1, 1);
    frame.base:SetVertexColor(unpack(baseColor));
    frame.healthback = frame:CreateTexture(nil, "BACKGROUND", nil, 1);
    frame.healthback:SetPoint("TOPLEFT", frame, "TOPLEFT", 1, -1);
    frame.healthback:SetPoint("BOTTOMRIGHT", frame, "RIGHT", -1, -5);
    frame.healthback:SetTexture(barTexture);
    frame.healthback:SetVertexColor(unpack(bgColor));
    frame.health = frame:CreateTexture(nil, "BORDER");
    frame.health:SetPoint("TOPLEFT", frame.healthback, "TOPLEFT");
    frame.health:SetPoint("BOTTOMLEFT", frame.healthback, "BOTTOMLEFT");
    frame.health:SetTexture(barTexture);
    frame.health:SetVertexColor(unpack(healthColor));
    frame.healthText = frame:CreateFontString(nil, "ARTWORK", "GameFontHighlightLarge");
    frame.healthText:SetPoint("RIGHT", frame.healthback, "RIGHT", -2, 1);
    frame.manaback = frame:CreateTexture(nil, "BACKGROUND", nil, 1);
    frame.manaback:SetPoint("TOPLEFT", frame, "LEFT", 1, -5);
    frame.manaback:SetPoint("BOTTOMRIGHT", frame, "BOTTOMRIGHT", -1, 1);
    frame.manaback:SetTexture(barTexture);
    frame.manaback:SetVertexColor(unpack(bgColor));
    frame.mana = frame:CreateTexture(nil, "BORDER");
    frame.mana:SetPoint("TOPLEFT", frame.manaback, "TOPLEFT");
    frame.mana:SetPoint("BOTTOMLEFT", frame.manaback, "BOTTOMLEFT");
    frame.mana:SetTexture(barTexture);
    frame.manaText = frame:CreateFontString(nil, "ARTWORK", "GameFontHighlight");
    frame.manaText:SetPoint("RIGHT", frame.manaback, "RIGHT", -2, 1);
    frame.manaText:Hide();
    frame.shield = frame:CreateTexture(nil, "BORDER");
    frame.shield:SetPoint("TOPLEFT", frame.health, "TOPRIGHT");
    frame.shield:SetPoint("BOTTOMLEFT", frame.health, "BOTTOMRIGHT");
    frame.shield:SetTexture(barTexture);
    frame.shield:SetVertexColor(unpack(shieldColor));
    frame.shield:Hide();
    frame.shieldhl = frame:CreateTexture(nil, "ARTWORK");
    frame.shieldhl:SetPoint("TOPLEFT", frame.healthback, "TOPRIGHT", -1, 0);
    frame.shieldhl:SetPoint("BOTTOMRIGHT", frame.healthback, "BOTTOMRIGHT", 1, 0);
    frame.shieldhl:SetColorTexture(unpack(shieldhlColor));
    frame.shieldhl:Hide();
    frame.healpred = frame:CreateTexture(nil, "ARTWORK");
    frame.healpred:SetPoint("TOPLEFT", frame.health, "TOPRIGHT");
    frame.healpred:SetPoint("BOTTOMLEFT", frame.health, "BOTTOMRIGHT");
    frame.healpred:SetColorTexture(unpack(healpredColor));
    frame.healpred:Hide();
    frame.healabsorb = frame:CreateTexture(nil, "ARTWORK");
    frame.healabsorb:SetPoint("TOPRIGHT", frame.health, "TOPRIGHT");
    frame.healabsorb:SetPoint("BOTTOMRIGHT", frame.health, "BOTTOMRIGHT");
    frame.healabsorb:SetColorTexture(unpack(healabsorbColor));
    frame.healabsorb:Hide();
    frame.status = frame:CreateTexture(nil, "OVERLAY");
    frame.status:SetPoint("TOPLEFT", frame.manaback, "BOTTOMLEFT", -8, 8);
    frame.status:SetPoint("BOTTOMRIGHT", frame.manaback, "BOTTOMLEFT", 8, -8);
    frame.status:SetTexture("Interface\\CHARACTERFRAME\\UI-StateIcon");
    frame.status:Hide();
    frame.pvp = frame:CreateTexture(nil, "OVERLAY");
    frame.pvp:SetPoint("TOPLEFT", frame.manaback, "BOTTOMLEFT", 8, 6);
    frame.pvp:SetPoint("BOTTOMRIGHT", frame.manaback, "BOTTOMLEFT", 32, -18);
    frame.pvp:SetTexture("Interface\\TARGETINGFRAME\\UI-PVP-Horde");
    frame.pvp:Hide();
    frame.leader = frame:CreateTexture(nil, "OVERLAY");
    frame.leader:SetPoint("TOPLEFT", frame.healthback, "TOPLEFT", -6, 6);
    frame.leader:SetPoint("BOTTOMRIGHT", frame.healthback, "TOPLEFT", 6, -6);
    frame.leader:Hide();
    frame.name = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlightLarge");
    frame.name:SetPoint("LEFT", frame.healthback, "LEFT", 2, 1);
    frame.name.count = 9;
    frame.level = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlight");
    frame.level:SetPoint("LEFT", frame.manaback, "LEFT", 2, 1);
    frame.targeticon = frame:CreateTexture(nil, "OVERLAY");
    frame.targeticon:SetPoint("CENTER", frame.healthback, "TOP");
    frame.targeticon:SetWidth(18);
    frame.targeticon:SetHeight(18);
    frame.targeticon:SetTexture("Interface\\TARGETINGFRAME\\UI-RaidTargetingIcons");
    frame.targeticon:Hide();
    frame.castbar = OmaUFCastBar.CreateCastBar(frame, unit, 8);
    createAuraFrame(frame, unit);
    -- set scripts
    frame:SetScript("OnShow", frameShow);
    frame:SetScript("OnHide", frameHide);
    frame:SetScript("OnEvent", unitEvent);
    secure:SetScript("OnEnter", showTooltip);
    secure:SetScript("OnLeave", hideTooltip);
    -- set attributes
    secure:RegisterForClicks("AnyDown");
    for attr, val in pairs(attributes) do
        secure:SetAttribute(attr, val);
    end
    -- rest give target and menu
    secure:SetAttribute("*type1", "target");
    secure:SetAttribute("*type2", "togglemenu");
    secure:SetAttribute("toggleForVehicle", false);
    RegisterUnitWatch(frame);
    RegisterUnitWatch(secure);
    return frame;
end