/** WorldSim —— 世界自进化引擎（game/engine/sim/WorldSim.ts） */
import { World } from '../runtime/World'
import { WorldSimState, NpcDynamics, WORLDSIM, CALAMITY_EFFECT, CALAMITY_FAMILY, CalamityName, POOL_BASE } from './worldsim-data'
import { pack } from '../../data/registry'
import { ITEMS } from '../../data/items'
import { npcById } from '../../data/npcs'
import { MAJORS, MAJOR_ORDER } from '../../data/realms'

const MARKET_IDS = ['lingcao', 'lingkuang', 'beastcore', 'pill-qiyuan', 'pill-ningyuan']

export class WorldSim {
  constructor(private w: World) {}

  private s(): WorldSimState {
    const w = this.w
    if (!w.state.worldSim) w.state.worldSim = initSim(w) as never
    const ws = w.state.worldSim as WorldSimState
    if (!ws.secretQi || Object.keys(ws.secretQi).length === 0) {
      const defs = pack().missions
      ws.secretQi = {}
      for (const m of defs) ws.secretQi[m.id] = 50
    }
    return ws
  }

  tick(): void {
    const s = this.s()
    const rng = this.w.rng
    // ---- C. 灵气潮汐（大周期） ----
    s.tideTicks++
    const phase = (s.tideTicks % WORLDSIM.tideCycle) / WORLDSIM.tideCycle
    const sine = 0.5 + 0.5 * Math.sin(phase * Math.PI * 2)
    s.tide = WORLDSIM.tideMin + sine * (WORLDSIM.tideMax - WORLDSIM.tideMin)

    // 秘境灵气（自动恢复 + 探索消耗由 missions 在探索时扣）
    for (const key of Object.keys(s.secretQi)) {
      s.secretQi[key] = clamp(s.secretQi[key] + (s.tide > 0.85 ? 5 : 2) - (s.secretQi[key] > 70 ? 2 : 0), 0, 100)
    }

    // ---- D. 灾变年签（每年首月一掷） ----
    if (this.w.state.month === 1 && rng.chance(WORLDSIM.calamityChance)) {
      const cl = rng.pick([...WORLDSIM.calamities])
      s.calamity = cl
      s.calamityYear = this.w.state.year
      applyCalamityToMarket(s, cl as CalamityName)
      this.w.log('bad', `【天下灾年】${cl}——灵植减产，市价将行。`)
      // B7 灾年落家族（一次性体感效果）
      if (cl === '疫病') {
        for (const c of this.w.aliveMembers()) {
          if (this.w.rng.chance(0.6)) {
            const dmg = 8 + this.w.rng.int(0, 14)
            c.health = Math.max(1, c.health - dmg)
            if (c.health < 20) c.state = 'wounded'
          }
        }
        this.w.log('bad', `瘟疫蔓延，族中大半病倒——灵药告急！`)
      } else if (cl === '兽潮') {
        const st = this.w.state.family.stones
        this.w.state.family.stones -= Math.round(st * 0.04)
        inv(this.w)['beastcore'] = (inv(this.w)['beastcore'] ?? 0) + 2
        this.w.log('bad', `兽潮涌至，坊市稍有折损；猎得兽核数枚。`)
      }
    } else {
      s.calamity = undefined
    }

    // ---- A. 资源循环市场（库存自然流向 + 再平衡 + 价格信号） ----
    driftMarket(s, rng.next())

    // ---- B. NPC 演化（聚合模拟） ----
    evolveNpc(this.w, s, rng.next())

    // ---- E. 天下快讯（节流） ----
    if ((this.w.state.totalTicks % WORLDSIM.newsEvery) === 0) {
      pushNews(this.w, s, MARKET_IDS)
    }

    // ---- C2. 快讯裁剪 ----
    if (s.newsFeed.length > WORLDSIM.newsKeep) s.newsFeed.splice(0, s.newsFeed.length - WORLDSIM.newsKeep)
  }

  /** 秘境探索消耗灵气（missions 调用；统一入口，默认 6 点） */
  consumeSecretQi(id: string, amount = 6): void {
    const s = this.s()
    if (s.secretQi[id] === undefined) s.secretQi[id] = 50
    s.secretQi[id] = clamp(s.secretQi[id] - amount, 0, 100)
  }

  /** 秘境灵气对探索收益的门槛（低灵气收益衰减提示） */
  secretQiOf(id: string): number {
    const s = this.s()
    return s.secretQi[id] ?? 50
  }

  /** 灵气系数（修炼/掉落市场乘子） */
  tideMult(): number {
    return this.s().tide
  }

  /** 当前市场行情（价格乘子，反馈到 Market） */
  marketMultFor(id: string): number {
    const s = this.s()
    const pool = s.marketPool[id] ?? 50
    const base = poolBase(id)
    return clamp(pool / base, WORLDSIM.priceFloor, WORLDSIM.priceCeil)
  }

  news(): WorldSimState['newsFeed'] {
    return this.s().newsFeed
  }

  secretLis(): Record<string, number> {
    return this.s().secretQi
  }

  npcDyn(): Record<string, NpcDynamics> {
    return this.s().npcDyn
  }
}

function initSim(w: World): WorldSimState {
  const s = { ...empty() }
  for (const id of Object.keys(w.state.npcFamilies)) {
    s.npcDyn[id] = {
      leaderName: '新任宗主',
      leaderRealmIdx: MAJOR_ORDER.indexOf(npcById(id).leaderRealm),
      leaderAge: 40 + w.rng.int(0, 29),
      lastEvent: '',
      lastEventYear: -99,
      relationsWithOthers: {}
    }
  }
  s.secretQi = {}
  return s
}

function empty(): WorldSimState {
  return {
    marketPool: { lingcao: 600, lingkuang: 300, beastcore: 80, 'pill-qiyuan': 90, 'pill-ningyuan': 40 },
    npcDyn: {},
    secretQi: {},
    tide: 0.5,
    tideDir: 1,
    tideTicks: 0,
    calamityYear: -99,
    newsFeed: [],
    lastNewsMonth: -99,
    npcSuccessions: 0
  }
}

function driftMarket(s: WorldSimState, noise: number): void {
  let n = noise
  for (const id of MARKET_IDS) {
    const per = n; n += 0.13
    const base = poolBase(id)
    const cur = s.marketPool[id] ?? base
    // 向基准再平衡 + 噪声漂移（价格弹性）
    const rebalance = (base - cur) * WORLDSIM.marketRebalance
    const drift = ((per % 1) - 0.5) * WORLDSIM.marketDriftRate * base

    s.marketPool[id] = Math.max(base * 0.3, cur + rebalance + drift)
  }
}

function inv(w: World): Record<string, number> {
  return w.state.family.inventory
}

function applyCalamityToMarket(s: WorldSimState, cl: CalamityName): void {
  const eff = CALAMITY_EFFECT[cl]
  for (const [id, pct] of Object.entries(eff) as [string, number][]) {
    s.marketPool[id] = Math.max(10, (s.marketPool[id] ?? 50) * (1 + pct))
  }
}

function poolBase(id: string): number {
  return POOL_BASE[id] ?? 100
}

function evolveNpc(w: World, s: WorldSimState, noise: number): void {
  void noise
  const year = w.state.year
  for (const [id, npc] of Object.entries(w.state.npcFamilies)) {
    const dyn = s.npcDyn[id] ?? initDynFor(id)
    s.npcDyn[id] = dyn
    const def = npcById(id)
    const curRealm = MAJOR_ORDER[dyn.leaderRealmIdx] ?? def.leaderRealm
    const lifespan = MAJORS[curRealm].lifespan
    if (w.state.month === 1) {
      dyn.leaderAge++
      // 换代评估：寿终阈值 或 年首小概率（退隐/遇害）——约 50 年一代
      const chanceNow = dyn.leaderAge > lifespan * 0.9 ? 0.5 : 0.02
      if (w.rng.chance(chanceNow) && !w.rng.chance(0.25)) {
        dyn.leaderAge = 30 + w.rng.int(0, 25)
        dyn.leaderRealmIdx = Math.min(dyn.leaderRealmIdx + 1, 5)
        dyn.leaderName = `${def.name.replace('氏', '')}氏新主`
        npc.power = Math.round(Math.max(40, npc.power + 15))
        dyn.lastEvent = '宗祧更替'
        dyn.lastEventYear = year
        s.npcSuccessions++
        pushNews(w, s, [id])
        w.log('info', `【天下】${def.name} 更易宗主，气象一新。`)
      }
    }
    void npc
  }
}

function initDynFor(id: string): NpcDynamics {
  const def = npcById(id)
  return {
    leaderName: `${def.name.replace('氏', '')}氏宗主`,
    leaderRealmIdx: MAJOR_ORDER.indexOf(def.leaderRealm),
    leaderAge: 45,
    lastEvent: '',
    lastEventYear: -99,
    relationsWithOthers: {}
  }
}

function pushNews(w: World, s: WorldSimState, about: string[]): void {
  const rng = w.rng
  const idx = rng.int(0, about.length - 1)
  const id = about[idx]
  const tide = s.tide > 1.0 ? '灵潮上涨' : s.tide < 0.75 ? '灵潮回落' : '汐平'
  let row: { year: number; month: number; src: string; text: string }
  if (id.startsWith('n-')) {
    const def = npcById(id)
    const dyn = s.npcDyn[id]
    row = {
      year: w.state.year,
      month: w.state.month,
      src: def.name,
      text: dyn ? `灵潮气象：${dyn.leaderName} 宗主更替，势力重排。` : `${def.name} 世务新张。`
    }
  } else {
    const pool = clamp(s.marketPool[id] ?? poolBase(id), POOL_BASE[id] * 0.5, POOL_BASE[id] * 1.8)
    const base = poolBase(id)
    const pct = Math.round(((pool - base) / base) * 100)
    const itemName = ITEMS[id]?.name ?? id
    row = {
      year: w.state.year,
      month: w.state.month,
      src: `世界·${itemName}`,
      text: pct !== 0 ? `${itemName}行情${pct > 0 ? '升' : '降'}${Math.abs(pct)}% (${tide})` : `${itemName}行情平稳 (${tide})`
    }
  }
  s.newsFeed.push(row)
  s.lastNewsMonth = w.state.month
}

function clamp(v: number, lo: number, hi: number): number {
  return Math.max(lo, Math.min(hi, v))
}