// act-gameplay.js — acts.html 上「玩法确实存在」的断言（M6 / issue #21）
//
// 这是 map-save-load.js 退役后，唯一还需要真浏览器的那部分：证明真地图场景里
// 怪物被生成进了世界、能被打死、掉落能被捡起、K/L 存读档走的是引擎的 tick 路径。
// 纯逻辑部分已经在 tests/engine-save-load.test.ts 与 tests/iso-terrain.test.ts 覆盖。
//
//   CHROME=/usr/bin/google-chrome
//   node scripts/browser/inspect-page.mjs "$CHROME" \
//     "http://127.0.0.1:5173/acts.html?act=1" scripts/browser/checks/act-gameplay.js
(async () => {
  const sleep = (ms) => new Promise((r) => setTimeout(r, ms))
  const press = (code, down) =>
    window.dispatchEvent(new KeyboardEvent(down ? 'keydown' : 'keyup', { code, bubbles: true }))
  const tap = async (code, ms) => { press(code, true); await sleep(ms); press(code, false); await sleep(60) }

  const deadline = Date.now() + 120000
  while (Date.now() < deadline) {
    const s = window.__d2webAct
    if (s && (s.ready || s.error)) break
    await sleep(200)
  }
  const s = window.__d2webAct
  if (s === undefined) return { error: 'no scene state' }
  if (s.error) return { error: s.error }

  await sleep(2000)
  const spawned = {
    monstersSpawned: s.monstersSpawned ?? null,
    monstersAlive: s.monstersAlive ?? null,
    npcs: s.npcs ?? null,
    walkable: s.walkable,
  }

  // 追着打：四个方向各走一段并连续挥砍，直到有击杀或超时。
  const dirs = ['ArrowRight', 'ArrowDown', 'ArrowLeft', 'ArrowUp']
  const fightUntil = Date.now() + 40000
  let round = 0
  while (Date.now() < fightUntil && (window.__d2webAct?.kills ?? 0) === 0) {
    const dir = dirs[round % dirs.length]
    press(dir, true)
    for (let i = 0; i < 6; i += 1) await tap('Space', 180)
    press(dir, false)
    await sleep(120)
    round += 1
  }
  await sleep(400)
  for (let i = 0; i < 8; i += 1) await tap('KeyE', 120)
  await sleep(300)

  const fought = {
    kills: window.__d2webAct?.kills ?? null,
    playerHits: window.__d2webAct?.playerHits ?? null,
    dropsRolled: window.__d2webAct?.dropsRolled ?? null,
    groundItems: window.__d2webAct?.groundItems ?? null,
    pickups: window.__d2webAct?.pickups ?? null,
    gold: window.__d2webAct?.gold ?? null,
    bagItems: window.__d2webAct?.bagItems ?? null,
    playerXp: window.__d2webAct?.playerXp ?? null,
    playerHp: window.__d2webAct?.playerHp ?? null,
  }

  await tap('KeyK', 200)
  await sleep(400)
  const savedAt = { x: Math.round(window.__d2webAct?.x ?? 0), y: Math.round(window.__d2webAct?.y ?? 0), kills: window.__d2webAct?.kills ?? null }

  press('ArrowRight', true); await sleep(2000); press('ArrowRight', false)
  await sleep(400)
  const drifted = { x: Math.round(window.__d2webAct?.x ?? 0), y: Math.round(window.__d2webAct?.y ?? 0) }

  await tap('KeyL', 200)
  await sleep(600)
  const after = { x: Math.round(window.__d2webAct?.x ?? 0), y: Math.round(window.__d2webAct?.y ?? 0), kills: window.__d2webAct?.kills ?? null }

  const gl = document.querySelector('#view')?.getContext('webgl2')
  return {
    source: s.source,
    level: s.level,
    spawned,
    fought,
    savedAt,
    drifted,
    after,
    restored: after.x === savedAt.x && after.y === savedAt.y,
    saves: window.__d2webAct?.saves ?? null,
    loads: window.__d2webAct?.loads ?? null,
    saveError: window.__d2webAct?.saveError ?? null,
    tick: window.__d2webAct?.tick ?? null,
    glError: gl ? gl.getError() : null,
  }
})()