include("../scripts/ai/include/basic.lua")
include("../scripts/ai/include/attack.lua")

--[[
--  Variables to adjust AI.
--
--  These variables can be used to adjust the generic AI to suit other roles.
--]]

armour_run      = 0     -- At which damage to run at.
armour_return   = 0     -- At which armour to return to combat.
shield_run      = 0     -- At which shield to run.
shield_return   = 0     -- At which shield to return to combat.
aggressive      = false -- Should pilot actively attack enemies?
safe_distance   = 300   -- Safe distance from enemies to jump.
land_planet     = true  -- Should land on planets?

control_rate = 2

function control()
  task = ai.taskname()
  enemy = ai.getenemy()

  -- Get new task.
  if task == "none" then
    idle()

  -- Think for attacking.
  elseif task == "attack" then
    -- Runaway if needed.
    if(shield_run > 0 and ai.pshield() < shield_run) or
        (armour_run > 0 and ai.parmour() < armour_run) then
      ai.pushtask(0, "runaway", ai.target())

    -- Think like normal.
    else
      attack_think()
    end

  -- Pilot is running away.
  elseif task == "runaway" then
    dist = ai.dist(ai.pos(ai.target()))

    if aggressive and((shield_return > 0 and ai.pshield() >= shield_return) or
        (armour_return > 0 and ai.parmour() >= armour_return)) then
      ai.poptask() -- "attack" should be above "runaway"

    -- Try to jump now.
    elseif dist > safe_distance then
      ai.hyperspace()
    end

  -- Enemy sighted, handled after running away.
  elseif enemy ~= nil and aggressive then
    taunt(enemy, true)
    ai.pushtask(0, "attack", enemy)

  -- Enter hyperspace if possible.
  elseif task == "hyperspace" then
    ai.hyperspace() -- Try to hyperspace.
  end
end

function attacked(attacker)
  task = ai.taskname()
  if task ~= "attack" and task ~= "runaway" then
    -- Some taunting
    taunt(attacker, false)

    -- Now pilot fights back.
    ai.pushtask(0, "attack", attacker)

  elseif task == "attack" then
    if ai.target() ~= attacker then
      ai.pushtask(0, "attack", attacker)
    end
  end
end

-- Default task to run when idle.
function idle()
  planet = ai.landplanet()
  -- Planet must exist.
  if planet == nil or land_planet == false then
    ai.pushtask(0, "hyperspace")
  else
    mem.land = planet
    ai.pushtask(0, "hyperspace")
    ai.pushtask(0, "land")
  end
end

function create()
  attack_choose()
end

function taunt(target, offensive)
  -- Empty stub.
end