pfUI:RegisterModule("group", function ()
  -- do not go further on disabled UFs
  if C.unitframes.disable == "1" then return end

  -- scan for group targets
  pfUI.uf.groupscanner = CreateFrame("Frame", nil, UIParent)
  pfUI.uf.groupscanner:Hide()
  pfUI.uf.groupscanner:SetScript("OnUpdate", function()
    if ( this.limit or 1) > GetTime() then return else this.limit = GetTime() + .2 end

    for i=1, 4 do
      if (UnitExists("party" .. i) and UnitExists("party" .. i .. "target")) or (pfUI.unlock and pfUI.unlock:IsShown()) then
        pfUI.uf.group[i].target:Show()
      else
        pfUI.uf.group[i].target:Hide()
      end
    end
  end)

  -- hide blizzard group frames
  for i=1, 4 do
    if _G["PartyMemberFrame" .. i] then
      _G["PartyMemberFrame" .. i]:Hide()
      _G["PartyMemberFrame" .. i].Show = function () return end
    end
  end

  pfUI.uf.group = {}

  function pfUI.uf.group:UpdateConfig()
    local startid = C.unitframes.selfingroup == "1" and 0 or 1
    local spacing = C.unitframes.group.pspace
    local default_border = C.appearance.border.default
    if C.appearance.border.unitframes ~= "-1" then
      default_border = C.appearance.border.unitframes
    end

    for i=0, 4 do
      local active = i >= 1 or startid == 0

      if active then
        pfUI.uf.group[i] = pfUI.uf.group[i] or pfUI.uf:CreateUnitFrame("Party", i, C.unitframes.group)
        pfUI.uf.group[i]:UpdateFrameSize()
        pfUI.uf.group[i]:SetPoint("TOPLEFT", 5, -5 - ((i-startid)*75))
        pfUI.uf.group[i]:UpdateConfig()
        UpdateMovable(pfUI.uf.group[i])
      elseif pfUI.uf.group[i] then
        pfUI.uf.group[i]:UpdateConfig()
        RemoveMovable(pfUI.uf.group[i])
      end

      if C.unitframes.grouptarget.visible == "1" and active then
        pfUI.uf.group[i].target = pfUI.uf.group[i].target or pfUI.uf:CreateUnitFrame("Party" .. i .. "Target", nil, C.unitframes.grouptarget, 0.2)
        pfUI.uf.group[i].target:UpdateFrameSize()
        pfUI.uf.group[i].target:SetPoint("TOPLEFT", pfUI.uf.group[i], "TOPRIGHT", 3*default_border, 0)
        pfUI.uf.group[i].target:UpdateConfig()
        UpdateMovable(pfUI.uf.group[i].target)
        pfUI.uf.groupscanner:Show()
      elseif pfUI.uf.group[i] and pfUI.uf.group[i].target then
        pfUI.uf.groupscanner:Hide()
        pfUI.uf.group[i].target:UpdateConfig()
        RemoveMovable(pfUI.uf.group[i].target)
      end

      if C.unitframes.grouppet.visible == "1" and active then
        pfUI.uf.group[i].pet = pfUI.uf.group[i].pet or pfUI.uf:CreateUnitFrame("PartyPet", i, C.unitframes.grouppet, 0.5)
        pfUI.uf.group[i].pet:UpdateFrameSize()
        pfUI.uf.group[i].pet:SetPoint("BOTTOMLEFT", pfUI.uf.group[i], "BOTTOMRIGHT", 3*default_border, -default_border)
        pfUI.uf.group[i].pet:UpdateConfig()
        UpdateMovable(pfUI.uf.group[i].pet)
      elseif pfUI.uf.group[i] and pfUI.uf.group[i].pet then
        pfUI.uf.group[i].pet:UpdateConfig()
        RemoveMovable(pfUI.uf.group[i].pet)
      end
    end
  end

  pfUI.uf.group:UpdateConfig()
end)