## Target selector: picks which enemy to aim at.

import enemy_tracker

type TargetMode* = enum
  tmClosest,   ## nearest enemy
  tmWeakest,   ## lowest energy (finisher)
  tmBestGun    ## future — alias to closest for now

proc selectTarget*(et: EnemyTracker, selfX, selfY: float,
                   mode: TargetMode = tmClosest): int =
  ## Returns enemy bot ID. Falls back to 1v1 naturally when 1 alive.
  let alive = et.allAlive()
  if alive.len == 0: return -1
  if alive.len == 1: return alive[0].id
  let chosen = case mode
    of tmWeakest: et.weakest()
    else:         et.closestTo(selfX, selfY)  # tmClosest + tmBestGun
  result = chosen.id