pfUI.autoshift = CreateFrame("Frame")
pfUI.autoshift:RegisterEvent("UI_ERROR_MESSAGE")

pfUI.autoshift.LastErr = ""
Hook_CastSpell = CastSpell
Hook_CastSpellByName = CastSpellByName
Hook_UseAction = UseAction

-- deDE
pfUI.autoshift.wantBattleStance = "Muss in Kampfhaltung sein."
pfUI.autoshift.wantBattleDefStance = "Muss in Kampfhaltung, Verteidigungshaltung sein."
pfUI.autoshift.BattleStance = "Kampfhaltung"
pfUI.autoshift.BattleStance = "Kampfhaltung"
pfUI.autoshift.wantBerserkerStance = "Muss in Berserkerhaltung sein."
pfUI.autoshift.BerserkerStance = "Berserkerhaltung"
pfUI.autoshift.wantDefensiveStance = "Muss in Verteidigungshaltung sein."
pfUI.autoshift.DefensiveStance = "Verteidigungshaltung"

function CastSpell(spellId, spellbookTabNum)
  if pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleDefStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBerserkerStance then
    Hook_CastSpellByName(pfUI.autoshift.BerserkerStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantDefensiveStance then
    Hook_CastSpellByName(pfUI.autoshift.DefensiveStance)
  end
  pfUI.autoshift.LastErr = ""

  Hook_CastSpell(spellId, spellbookTabNum)
end

function CastSpellByName(spellName, onSelf)
  if pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleDefStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBerserkerStance then
    Hook_CastSpellByName(pfUI.autoshift.BerserkerStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantDefensiveStance then
    Hook_CastSpellByName(pfUI.autoshift.DefensiveStance)
  end
  pfUI.autoshift.LastErr = ""

  Hook_CastSpellByName(spellName, onSelf)
end

function UseAction(slot, checkCursor, onSelf)
  if pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBattleDefStance then
    Hook_CastSpellByName(pfUI.autoshift.BattleStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantBerserkerStance then
    Hook_CastSpellByName(pfUI.autoshift.BerserkerStance)
  elseif pfUI.autoshift.LastErr == pfUI.autoshift.wantDefensiveStance then
    Hook_CastSpellByName(pfUI.autoshift.DefensiveStance)
  end
  pfUI.autoshift.LastErr = ""

  Hook_UseAction(slot, checkCursor, onSelf)
end

pfUI.autoshift.Buffs = { "spell_nature_swiftness", "_mount_", "_qirajicrystal_",
  "ability_racial_bearform", "ability_druid_catform", "ability_druid_travelform",
  "spell_nature_forceofnature", "ability_druid_aquaticform", "spell_shadow_shadowform",
  "spell_nature_spiritwolf" }

pfUI.autoshift.Errors = { SPELL_FAILED_NOT_MOUNTED, ERR_ATTACK_MOUNTED, ERR_TAXIPLAYERALREADYMOUNTED,
  SPELL_FAILED_NOT_SHAPESHIFT, SPELL_FAILED_NO_ITEMS_WHILE_SHAPESHIFTED, SPELL_NOT_SHAPESHIFTED,
  SPELL_NOT_SHAPESHIFTED_NOSPACE, ERR_CANT_INTERACT_SHAPESHIFTED, ERR_NOT_WHILE_SHAPESHIFTED,
  ERR_NO_ITEMS_WHILE_SHAPESHIFTED, ERR_TAXIPLAYERSHAPESHIFTED,ERR_MOUNT_SHAPESHIFTED,
  ERR_EMBLEMERROR_NOTABARDGEOSET }

pfUI.autoshift:SetScript("OnEvent", function()
    pfUI.autoshift.LastErr = arg1

    for id, errorstring in pairs(pfUI.autoshift.Errors) do
      if arg1 == errorstring then
        for i=0,15,1 do
          currBuffTex = GetPlayerBuffTexture(i);
          if (currBuffTex) then
            for id, bufftype in pairs(pfUI.autoshift.Buffs) do
              if string.find(string.lower(currBuffTex), bufftype) then
                CancelPlayerBuff(i);
              end
            end
          end
        end
      end
    end
  end)