local f = OmaRF.frames;
local majorFrames = OmaRF.majorFrames;
local positions = OmaRF.positions;
local pad = 2;
local paddings = {
    TOPLEFT = {pad, -pad},
    TOPRIGHT = {-pad, -pad},
    CENTER = {0, 0},
    BOTTOMLEFT = {pad, pad},
    BOTTOMRIGHT = {-pad, pad}
};
local watchedAuras;
local majorAuras;
local majorMax;
local auraFilters = {"HELPFUL", "HARMFUL"};
local DEFAULT_ICON = "Interface\\AddOns\\OmaRF\\images\\rhomb";
local _;

-- global functions used every update
local C_TimerAfter = C_Timer.After;
local GetTime = GetTime;
local UnitAura = UnitAura;
local UnitIsPlayer = UnitIsPlayer;
local UnitIsConnected = UnitIsConnected;
local UnitIsDeadOrGhost = UnitIsDeadOrGhost;
local CompactRaidFrameContainer_ApplyToFrames = CompactRaidFrameContainer_ApplyToFrames;
local format = string.format;
local unpack = unpack;
local floor = floor;
local ceil = ceil;

local function configureIndicators(frame, name)
    local frameName = name or frame:GetName();
    if not f[frameName] then return end

    local config = OmaRF.db.profile.indicators;
    for pos, ind in pairs(f[frameName]) do
        ind.text:SetFont(STANDARD_TEXT_FONT, config[pos]["textSize"]);
        ind.text:SetTextColor(unpack(config[pos]["textColor"]));
        ind.icon:SetWidth(config[pos]["iconSize"]);
        ind.icon:SetHeight(config[pos]["iconSize"]);
        ind.icon:SetTexture(DEFAULT_ICON);
        ind.icon:SetVertexColor(unpack(config[pos]["iconColor"]));
    end

    config = OmaRF.db.profile.majorAuras;
    for i, ind in ipairs(majorFrames[frameName]) do
        if i == 1 then
            ind.icon:ClearAllPoints();
            ind.icon:SetPoint("CENTER", frame, "CENTER", -config.iconSize, 0);
        end
        ind.icon:SetWidth(config.iconSize);
        ind.icon:SetHeight(config.iconSize);
        ind.expire:SetFont(STANDARD_TEXT_FONT, config["textSize"], "OUTLINE");
        ind.stack:SetFont(STANDARD_TEXT_FONT, config["textSize"], "OUTLINE");
    end
end

-- Create the FontStrings used for indicators
local function setupCompactUnitFrame(frame, name)
    f[name] = {};
    for _, pos in ipairs(positions) do
        f[name][pos] = {};
        f[name][pos].text = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlightSmall");
        f[name][pos].text:SetPoint(pos, frame, pos, paddings[pos][1], paddings[pos][2]);
        f[name][pos].icon = frame:CreateTexture(nil, "OVERLAY");
        f[name][pos].icon:SetPoint(pos, frame, pos, paddings[pos][1], paddings[pos][2]);
    end

    local config = OmaRF.db.profile.majorAuras;
    majorFrames[name] = {};
    for i = 1, config.max do
        majorFrames[name][i] = {};
        majorFrames[name][i].icon = frame:CreateTexture(nil, "OVERLAY");
        if i > 1 then
            majorFrames[name][i].icon:SetPoint("TOPLEFT", majorFrames[name][i-1].icon, "TOPRIGHT");
        end
        majorFrames[name][i].expire = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlightSmall");
        majorFrames[name][i].expire:SetPoint("BOTTOMRIGHT", majorFrames[name][i].icon, "BOTTOMRIGHT");
        majorFrames[name][i].stack = frame:CreateFontString(nil, "OVERLAY", "GameFontHighlightSmall");
        majorFrames[name][i].stack:SetPoint("TOPLEFT", majorFrames[name][i].icon, "TOPLEFT");
    end

    configureIndicators(frame, name);
end

local function remaining(expires, current)
    local remain = expires - current;
    if remain > 60 then
        return format("%dm", ceil(remain/60));
    end
    return floor(remain+0.5);
end

-- Check the indicators on a frame and update the times on them
local function updateIndicators(frame)
    local frameName = frame:GetName();
    local unit = frame.unit;
    if not unit then return end -- possible if the frame is just being hidden

    -- Create indicators if needed
    if not f[frameName] then setupCompactUnitFrame(frame, frameName) end
    -- Reset current
    for _, ind in pairs(f[frameName]) do
        ind.text:Hide();
        ind.icon:Hide();
    end
    for _, ind in ipairs(majorFrames[frameName]) do
        ind.icon:Hide();
        ind.expire:Hide();
        ind.stack:Hide();
    end
    -- Hide if unit is dead/disconnected
    if (not UnitIsConnected(unit)) or UnitIsDeadOrGhost(frame.displayedUnit) then
        return;
    end

    local name, icon, count, expires, caster, id;
    local current = GetTime();
    local majorI = 1;
    for _, filter in ipairs(auraFilters) do
        local i = 1;
        while true do
            name, _, icon, count, _, _, expires, caster, _, _, id = UnitAura(unit, i, filter);
            if not id then break end
            local pos = watchedAuras[id] or watchedAuras[name];
            if pos then
                local ind = f[frameName][pos];
                local config = OmaRF.db.profile.indicators[pos];
                if not config.mine or UnitIsPlayer(caster) then
                    if config.showIcon then
                        -- show icon
                        if config.useDefaultIcon then
                            ind.icon:SetTexture(DEFAULT_ICON);
                        else
                            ind.icon:SetTexture(icon);
                        end
                        ind.icon:Show()
                    end
                    if config.showText then
                        -- show text
                        ind.text:SetText(remaining(expires, current));
                        ind.text:Show();
                    end
                end
            end

            if (majorAuras[id] or majorAuras[name]) and majorI <= majorMax then
                local ind = majorFrames[frameName][majorI];
                ind.icon:SetTexture(icon);
                ind.icon:Show();
                ind.expire:SetText(remaining(expires, current));
                ind.expire:Show();
                if count > 1 then
                    ind.stack:SetText(count);
                    ind.stack:Show();
                end
                majorI = majorI + 1;
            end
            i = i + 1;
        end
    end
end

-- Update all indicators
function OmaRF:UpdateAllIndicators()
    CompactRaidFrameContainer_ApplyToFrames(CompactRaidFrameContainer, "normal", updateIndicators);
    if OmaRF.running then
        C_TimerAfter(0.15, OmaRF.UpdateAllIndicators);
    end
end

-- Used to update everything that is affected by the configuration
function OmaRF:RefreshConfig()
    self:OnDisable(); -- clear everything
    if self.db.profile.enabled then
        CompactRaidFrameContainer_ApplyToFrames(CompactRaidFrameContainer, "normal", configureIndicators);
        watchedAuras = {};
        for _, pos in ipairs(positions) do
            for _, aura in ipairs(self.db.profile.indicators[pos]["auras"]) do
                watchedAuras[aura] = pos; -- TODO single aura only in one position
            end
        end
        majorAuras = {};
        for _, aura in ipairs(self.db.profile.majorAuras["auras"]) do
            majorAuras[aura] = true;
        end
        majorMax = OmaRF.db.profile.majorAuras["max"];

        if next(watchedAuras) ~= nil or next(majorAuras) ~= nil then
            self.running = true;
            C_TimerAfter(0.15, self.UpdateAllIndicators);
        end
    end
end