local textures = {}

textures['Claw'] = 'Ability_Druid_Rake'
textures['Rip'] = 'Ability_GhoulFrenzy'
textures['Ferocious Bite'] = 'Ability_Druid_FerociousBite'
textures['Tiger\'s Fury'] = 'Ability_Mount_JungleTiger'
textures['Faerie Fire (Feral)'] = 'Spell_Nature_FaerieFire'
textures['Rake'] = 'Ability_Druid_Disembowel'
textures['Enrage'] = 'Ability_Druid_Enrage'
textures['Maul'] = 'Ability_Druid_Maul'
textures['Savage Bite'] = 'Ability_Racial_Cannibalize'
textures['Demoralizing Roar'] = 'Ability_Druid_DemoralizingRoar'
textures['Shred'] = 'Spell_Shadow_VampiricAura'
textures['Reshift'] = 'spell_reshift_2'
textures['Swipe'] = 'INV_Misc_MonsterClaw_03'

local function getTexture(spellName)
  if textures[spellName] ~= nil then
    return textures[spellName]
  end
  return false
end

local function getSlot(spellTexture)
  for i = 1, 120, 1 do
    if GetActionTexture(i) ~= nil then
      -- print(GetActionTexture(i))
      if (strfind(GetActionTexture(i), spellTexture)) then
        return i
      end
    end
  end
  return 0
end

local function isUsable(spellName)
  local spellTexture = getTexture(spellName)
  if spellTexture then
    local slot = getSlot(spellTexture)
    local usable, _ = IsUsableAction(slot)
    return usable
  else
    return false
  end
end

local function buffIndex(spellTexture)
  for i = 1, 40 do
    local texturePath = UnitBuff('player', i)
    if texturePath ~= nil and strfind(texturePath, spellTexture) then
      return i
    end
  end
  return 0
end

local function debuffIndex(spellTexture)
  for i = 1, 40 do
    local texturePath = UnitDebuff('target', i)
    if texturePath ~= nil and strfind(texturePath, spellTexture) then
      return i
    end
  end
  return 0
end

local function getBuffTimeLeft(buffName)
  local buffTexture = getTexture(buffName)
  if buffTexture then
    local name, _, _, _, _, duration, expirationTime = UnitBuff('player', buffIndex(buffTexture))
    return GetPlayerBuffTimeLeft(buffIndex(buffTexture))
  else
    return false
  end
end

local function debuffStacks(spellName)
  local spellTexture = getTexture(spellName)
  if spellTexture then
    local _, stacks = UnitDebuff('target', debuffIndex(spellTexture))
    if stacks == nill then
      return 0
    else
      return stacks
    end
  else
    return false
  end
end

function onCooldown(spellName)
  local spellID = 1
  local name, _ = GetSpellName(spellID, 'BOOKTYPE_SPELL')
  while (name) do
    if spellName == name then
      if GetSpellCooldown(spellID, 'BOOKTYPE_SPELL') == 0 then
        return false
      else
        return true
      end
    end
    spellID = spellID + 1
    name, _ = GetSpellName(spellID, 'BOOKTYPE_SPELL')
  end
end

local function comboPoints()
  return GetComboPoints('player', 'target')
end

local function cast(spellName)
  CastSpellByName(spellName)
end

local function gt(percent, value, max)
  if value / max > percent / 100 then
    return true
  end
  return false
end

local function target()
  if GetUnitName('target') == nil then
    TargetNearestEnemy()
    return
  else
    if UnitCanAttack('player', 'target') == nil then
      ClearTarget()
      return
    elseif UnitIsDead('target') == 1 then
      ClearTarget()
      return
    end
  end
end

local function reshift(lt)
  if isUsable('Reshift') and UnitMana('player') <= lt then
    cast('Reshift')
  end
end

local function dps(cp)
  local mana = UnitMana('player')
  local health = UnitHealth('player')

  if (not PlayerFrame.inCombat) then
    AttackTarget()
  else
    if comboPoints() < cp then
      if isUsable('Faerie Fire (Feral)') and not buffed('Faerie Fire (Feral)', 'target') and
        not onCooldown('Faerie Fire (Feral)') then
        cast('Faerie Fire (Feral)()')
      elseif isUsable('Tiger\'s Fury') and not buffed('Tiger\'s Fury', 'player') then
        cast('Tiger\'s Fury')
      elseif isUsable('Rake') and not buffed('Rake', 'target') then
        cast('Rake')
      elseif isUsable('Rip') and comboPoints() > 0 and not buffed('Rip', 'target') then
        cast('Rip')
      elseif isUsable('Claw') then
        cast('Claw')
      end
    elseif comboPoints() >= cp then
      if isUsable('Ferocious Bite') then
        cast('Ferocious Bite')
      end
    end
  end
end

local function tank()
  local mana = UnitMana('player')
  local health = UnitHealth('player')

  if (not PlayerFrame.inCombat) then
    AttackTarget()
  else
    if mana < 10 then
      if isUsable('Reshift') and mana <= 10 then
        cast('Reshift')
      elseif isUsable('Enrage') and not buffed('Enrage', 'player') and not onCooldown('Enrage') then
        cast('Enrage')
      end
    end
    if mana > 60 then
      if isUsable('Faerie Fire (Feral)') and not buffed('Faerie Fire (Feral)', 'target') and
        not onCooldown('Faerie Fire (Feral)') then
        cast('Faerie Fire (Feral)()')
      elseif isUsable('Demoralizing Roar') and not buffed('Demoralizing Roar', 'target') then
        cast('Demoralizing Roar')
      end
    end
    if isUsable('Maul') then
      cast('Maul')
    end
  end
end

local function dps_st()
  target()
  if buffed('Clearcasting', 'player') then reshift(40) end
  if getBuffTimeLeft('Tiger\'s Fury') < 5 then reshift(40) end
  dps(5)
end
local function dps_trash()
  target()
  if buffed('Clearcasting', 'player') then reshift(40) end
  if getBuffTimeLeft('Tiger\'s Fury') < 5 then reshift(40) end
  dps(3)
end

local function tank_st()
  target()
  tank()
  if isUsable('Savage Bite') and not onCooldown('Savage Bite') then
    cast('Savage Bite')
  end
end

local function tank_aoe()
  target()
  tank()
  if isUsable('Swipe') then
    cast('Swipe')
  end
end

function obd_onLoad()
  SlashCmdList['DPS_ST'] = dps_st
  SlashCmdList['DPS_TRASH'] = dps_trash
  SlashCmdList['TANK_ST'] = tank_st
  SlashCmdList['TANK_AOE'] = tank_aoe
  SLASH_DPS_ST1 = '/dps_st'
  SLASH_DPS_TRASH1 = '/dps_trash'
  SLASH_TANK_ST1 = '/tank_st'
  SLASH_TANK_AOE1 = '/tank_aoe'
end