/**
 * Evolution system test: each mechanic is verified on an isolated engine so
 * only the tower under test can kill the test enemies.
 */
import { GameEngine } from '../src/game/engine.ts'
import { TOWERS } from '../src/game/config.ts'
import type { Tower, TowerKind, Enemy } from '../src/game/types.ts'

let failures = 0
const ok = (label: string, cond: boolean): void => {
  console.log(`${cond ? '✓' : '✗ FEHLER'}: ${label}`)
  if (!cond) failures++
}

interface Rig {
  eng: GameEngine
  tower: Tower
  spawn(x: number, y: number, kind?: 'normal' | 'flyer' | 'boss'): Enemy
}

/** fresh engine with one max-level tower in the center */
function rig(kind: TowerKind, targetLevel = 9): Rig {
  const eng = new GameEngine()
  eng.startGame('easy')
  eng.money = 1_000_000
  eng.startWave(true)
  eng.placeTower(kind, 8, 5)
  const tower = eng.towerAt(8, 5)!
  while (tower.level < targetLevel) eng.upgradeTower(tower)
  const spawn = (x: number, y: number, k: 'normal' | 'flyer' | 'boss' = 'normal'): Enemy => {
    ;(eng as unknown as { spawnEnemy: (kk: 'normal' | 'flyer' | 'boss') => void }).spawnEnemy(k)
    const e = eng.enemies[eng.enemies.length - 1]
    e.x = x
    e.y = y
    e.speedBase = 0
    e.wp = 1
    return e
  }
  return { eng, tower, spawn }
}

function forceFire(r: Rig, ticks = 12): void {
  for (let i = 0; i < ticks; i++) {
    r.tower.cooldown = 0
    r.eng.update(1 / 30)
  }
}

const CX = 8 * 48 + 24
const CY = 5 * 48 + 24

// ---------- arrow: multishot + poison ----------
{
  const r = rig('arrow')
  ok('Bogenturm L9', r.tower.level === 9)
  const targets = [r.spawn(CX, CY - 30), r.spawn(CX, CY), r.spawn(CX, CY + 30), r.spawn(CX, CY + 60)]
  let arrows = 0
  for (let i = 0; i < 12; i++) {
    r.tower.cooldown = 0
    r.eng.update(1 / 30)
    arrows = Math.max(arrows, r.eng.projectiles.filter((p) => p.kind === 'arrow').length)
  }
  ok(`Multishot: mehrere Pfeile gleichzeitig (${arrows})`, arrows >= 3)
  ok('Pfeile treffen (Schaden)', targets.every((e) => e.hp < e.maxHp || e.dead))
  ok('Gift-DoT wirkt', r.eng.enemies.some((e) => e.dotDps === 28 && e.dotUntil > r.eng.time) || targets.every((e) => e.dead))
}

// ---------- frost: freeze + shatter ----------
{
  const r = rig('frost')
  ok('Eisturm L9', r.tower.level === 9)
  const e = r.spawn(CX, CY - 20, 'boss')
  for (let i = 0; i < 3; i++) {
    r.tower.cooldown = 0
    r.eng.update(1 / 30)
  }
  ok('Einfrieren nach 3 Pulsen (Faktor 0)', e.slowFactor === 0 && !e.dead)
  const hp = e.hp
  r.eng.damageEnemy(e, 100)
  ok('Zerbrechlich: +50% Schaden an Eingefrorenen', Math.abs(hp - e.hp - 150) < 1)
}

// ---------- tesla: stun + storm ----------
{
  const r = rig('tesla')
  ok('Tesla L9', r.tower.level === 9)
  const group = [r.spawn(CX - 24, CY), r.spawn(CX + 24, CY), r.spawn(CX, CY + 24)]
  r.tower.counter = 3 // nächster Schuss = Gewitter (jeder 4.)
  r.tower.cooldown = 0
  r.eng.update(1 / 30)
  const stunned = group.filter((e) => e.slowFactor === 0)
  ok(`Gewitter trifft + betäubt mehrere (${stunned.length}/3)`, stunned.length >= 2)
}

// ---------- laser: pierce ----------
{
  const r = rig('laser')
  ok('Laser L9', r.tower.level === 9)
  const line = [r.spawn(CX + 40, CY), r.spawn(CX + 75, CY), r.spawn(CX + 110, CY), r.spawn(CX + 145, CY)]
  forceFire(r)
  ok('Durchschlag trifft alle in der Linie', line.every((e) => e.hp < e.maxHp || e.dead))
}

// ---------- laser: prism (L4-6 only) ----------
{
  const r = rig('laser', 5)
  ok('Laser L5 (Prisma-Stufe)', r.tower.level === 5)
  r.spawn(CX + 40, CY)
  const b = r.spawn(CX + 60, CY + 10)
  const c = r.spawn(CX + 80, CY - 10)
  forceFire(r)
  ok('Prisma: Nebenziele nehmen Schaden', (b.hp < b.maxHp || b.dead) && (c.hp < c.maxHp || c.dead))
}

// ---------- cannon: flak + burn ----------
{
  const r = rig('cannon')
  ok('Kanone L9', r.tower.level === 9)
  ok('Flak-Upgrade aktiv (trifft Flieger)', TOWERS.cannon.flak![8] === true)
  const flyer = r.spawn(CX + 60, CY, 'flyer')
  forceFire(r)
  ok('Flak: Kanone beschädigt Flieger', flyer.hp < flyer.maxHp || flyer.dead)
  const boss = r.spawn(CX + 60, CY, 'boss')
  forceFire(r)
  ok('Brand-DoT wirkt', boss.dotDps > 0 && boss.dotColor === '#ff9c40')
}

console.log('---')
if (failures === 0) console.log('Alle Evolutions-Mechaniken funktionieren.')
else {
  console.log(`${failures} FEHLER!`)
  process.exit(1)
}