-- local imports
local ReAction = ReAction
local L = ReAction.L
local _G = _G

-- module declaration
local moduleID = "ButtonFacade"
local module = ReAction:NewModule( moduleID )

-- handlers
function module:OnInitialize()
  self.db = ReAction.db:RegisterNamespace( moduleID,
    {
      profile = {
        -- default profile goes here
      }
    }
  )

  local LBF = LibStub("LibButtonFacade",true)

  if not LBF then -- no more initialization
    return
  end

  self.LBF = LBF
  self.groups = { }

  -- override a method of ReAction.Bar
  -- note that 'self' in this context refers to the bar
  function ReAction.Bar:SkinButton( button, data )
    module:GetGroup(self:GetName()):AddButton(button:GetFrame(), data)
  end

  -- register some common events
  ReAction.RegisterCallback(self, "OnCreateBar")
  ReAction.RegisterCallback(self, "OnDestroyBar")
  ReAction.RegisterCallback(self, "OnRefreshBar")
  ReAction.RegisterCallback(self, "OnEraseBar")
  ReAction.RegisterCallback(self, "OnRenameBar")

  self.LBF:RegisterSkinCallback("ReAction", self.OnSkinChanged, self)
end

function module:OnEnable()

end

function module:OnDisable()

end

function module:OnCreateBar(event, bar, name)
  local c = self.db.profile[name]
  if not c then
     c = { 
      skinID = "Blizzard",
      backdrop = true,
      gloss = 0,
      colors = {},
    }
    self.db.profile[name] = c
  end

  local g = self:GetGroup(name)
  g.SkinID   = c.skinID or "Blizzard"
  g.Backdrop = c.backdrop
  g.Gloss    = c.gloss
  g.Colors   = c.colors
end

function module:OnDestroyBar(event, bar, name)
  if self.groups[name] then
    self.groups[name]:Delete()
    self.groups[name] = nil
  end
end

function module:OnRefreshBar(event, bar, name)
  local c = self.db.profile[name]
  local g = self.groups[name]
  if c and g then
    g:Skin(c.skinID, c.gloss, c.backdrop, c.colors)
  end
end

function module:OnEraseBar(event, bar, name)
  self:OnDestroyBar(event, bar, name)
  self.db.profile[name] = nil
end

function module:OnRenameBar(event, bar, oldName, newName)
  if self.groups[name] then
    self.groups[name]:Delete(true)
    self.db.profile[oldName], self.db.profile[newName] = nil, self.db.profile[oldName]
    self:OnCreateBar(event, bar, newName)
  end
end

function module:OnSkinChanged( skinID, gloss, backdrop, group, button, colors )
  local c = self.db.profile[group]
  if c then
    c.skinID   = skinID
    c.gloss    = gloss
    c.backdrop = backdrop
    c.colors   = colors
  end  
end

function module:GetGroup( name )
  if not self.groups[name] then
    self.groups[name] = self.LBF:Group("ReAction", name)
  end
  return self.groups[name]
end