/**
 * Map system verification:
 * - every map builds a valid, non-empty path & fly path
 * - path cells never collide with blocked (obstacle) cells
 * - maps differ from each other (distinct layouts)
 * - lockstep determinism holds on every map (two engines, same actions)
 * - obstacle clearing frees build tiles on every map
 * - a full 20-wave simulation is beatable/playable on every map
 */
import { GameEngine } from '../src/game/engine.ts'
import { MAPS, MAP_ORDER } from '../src/game/config.ts'
import type { MapId } from '../src/game/types.ts'

let failures = 0
function check(label: string, ok: boolean, detail = ''): void {
  if (!ok) {
    failures++
    console.error(`  ✗ ${label}${detail ? ` — ${detail}` : ''}`)
  } else {
    console.log(`  ✓ ${label}`)
  }
}

for (const mapId of MAP_ORDER) {
  const map = MAPS[mapId]
  console.log(`\n=== ${map.name} (${mapId}) ===`)

  const eng = new GameEngine()
  eng.setMap(mapId)
  eng.startGame('normal', mapId)

  // 1. path built & sane
  check('Wegpunkte vorhanden', eng.pathPx.length >= 2)
  check('Flugweg vorhanden', eng.flyPathPx.length >= 2)
  check('Pfadzellen markiert', eng.pathCells.size > 0)

  const wp = map.waypoints
  const interior = wp.slice(1, -1)
  check(
    'Innere Wegpunkte im Spielfeld',
    interior.every(([x, y]) => x >= 0 && x < 20 && y >= 0 && y < 11),
    JSON.stringify(wp),
  )
  check(
    'Start/Ende am Spielfeldrand',
    wp.every(([x, y]) => x === -1 || x === 20 || y >= 0),
  )

  // 2. no collision between path and obstacles
  const overlap = [...eng.pathCells].filter((k) => eng.blockedCells.has(k))
  check('Keine Hindernisse auf dem Weg', overlap.length === 0, overlap.join(','))

  // 3. obstacles exist and are removable
  const obstacleCells = [...eng.blockedCells]
  check('Hindernisse vorhanden', obstacleCells.length >= 8, `${obstacleCells.length} Zellen`)
  const [otx, oty] = obstacleCells[0].split(',').map(Number)
  eng.money = 999999
  eng.selectedObstacle = { tx: otx, ty: oty }
  eng.removeSelectedObstacle()
  check('Hindernis entfernbar', !eng.blockedCells.has(`${otx},${oty}`) && eng.canPlace(otx, oty))

  // 4. can place a tower next to the path
  const candidates: [number, number][] = []
  for (let tx = 0; tx < 20 && candidates.length < 1; tx++) {
    for (let ty = 0; ty < 11; ty++) {
      if (eng.canPlace(tx, ty)) {
        candidates.push([tx, ty])
        break
      }
    }
  }
  check('Freier Bauplatz gefunden', candidates.length > 0)
}

// 5. maps are distinct from each other
console.log('\n=== Karten unterscheiden sich ===')
const signatures = MAP_ORDER.map((m) => {
  const e = new GameEngine()
  e.setMap(m)
  return [m, [...e.pathCells].sort().join('|')] as const
})
for (let i = 0; i < signatures.length; i++) {
  for (let j = i + 1; j < signatures.length; j++) {
    check(
      `${signatures[i][0]} ≠ ${signatures[j][0]}`,
      signatures[i][1] !== signatures[j][1],
    )
  }
}

// 6. lockstep determinism per map (same action stream on two engines)
console.log('\n=== Lockstep-Determinismus je Karte ===')
for (const mapId of MAP_ORDER) {
  const e1 = new GameEngine()
  const e2 = new GameEngine()
  for (const e of [e1, e2]) {
    e.startGame('normal', mapId)
    e.mpGameActive = true
    e.mpMode = 'coop'
    e.coopHpMul = 1.7
  }

  const script: [number, Parameters<GameEngine['applyAction']>[0]][] = [
    [5, { type: 'build', kind: 'arrow', tx: 8, ty: 5 }],
    [10, { type: 'wave' }],
    [200, { type: 'build', kind: 'frost', tx: 4, ty: 0 }],
    [700, { type: 'wave' }],
    [900, { type: 'obstacle', tx: 19, ty: 0 }],
    [1500, { type: 'speed', s: 2 }],
  ]

  let idx = 0
  for (let tick = 1; tick <= 2400; tick++) {
    while (idx < script.length && script[idx][0] <= tick) {
      const a = script[idx][1]
      e1.applyAction(a, idx % 2)
      e2.applyAction(a, idx % 2)
      idx++
    }
    e1.update(1 / 30)
    e2.update(1 / 30)
  }

  const state = (e: GameEngine): string =>
    JSON.stringify({
      money: Math.floor(e.money * 1000),
      lives: e.lives,
      wave: e.waveNo,
      phase: e.phase,
      enemies: e.enemies.map((x) => [x.id, Math.round(x.hp * 1000), x.wp]),
      towers: e.towers.map((t) => [t.id, t.kind, t.level]),
      blocked: e.blockedCells.size,
      pathLen: e.pathPx.length,
    })
  check(`${mapId}: identischer Zustand`, state(e1) === state(e2))
}

// 7. full campaign simulation on every map (playable check)
console.log('\n=== 20-Wellen-Simulation je Karte ===')
for (const mapId of MAP_ORDER) {
  const e = new GameEngine()
  e.startGame('easy', mapId)
  // generous money + a tower on every free tile to verify the map is beatable
  e.money = 999999
  for (let tx = 0; tx < 20; tx++) {
    for (let ty = 0; ty < 11; ty++) {
      if (e.canPlace(tx, ty)) e.placeTower('laser', tx, ty)
    }
  }
  let finished = false
  for (let t = 0; t < 60000 && !finished; t++) {
    e.update(1 / 30)
    if (e.phase === 'intermission') {
      e.startWave(true)
    }
    finished = e.phase === 'victory' || e.phase === 'gameover'
  }
  check(`${mapId}: Kampagne abgeschlossen`, e.phase === 'victory', `Phase: ${e.phase}, Welle ${e.waveNo}`)
}

if (failures > 0) {
  console.error(`\n${failures} Prüfung(en) fehlgeschlagen.`)
  process.exit(1)
}
console.log('\nAlle Karten-Prüfungen bestanden. ✅')