import type { World } from './world'
import { WorldEventBus } from './world'
import { YearlyReport, BattleLog, ChronicleEntry, SaveMeta } from '../types/domain'
import { marketPrice, buyItem, sellItem, buyTechnique } from './market'
import { sendMission, recallAll } from './systems/missions'
import { giftNpc, makePeace, marryNpcFamily } from './systems/diplomacy'
import { combatPowerOf } from './systems/combat'
import type { LogKind } from './world'
import { computeLegacy, resolveLegacy, LegacyArch } from '../core/legacy'
import { yearAxis, AxisCell } from '../core/yearaxis'
import { PACK } from '../data/registry'

export type ActName =
  | 'head.set'
  | 'member.meditate'
  | 'member.technique'
  | 'member.equip'
  | 'member.pill'
  | 'member.advance'
  | 'member.marry'
  | 'member.post'
  | 'estate.build'
  | 'estate.upgrade'
  | 'estate.rite'
  | 'estate.sutra'
  | 'market.buy'
  | 'market.sell'
  | 'market.tech'
  | 'craft.pill'
  | 'diplomacy.gift'
  | 'diplomacy.peace'
  | 'diplomacy.taunt'
  | 'diplomacy.marry'
  | 'expedition.send'
  | 'expedition.recall'
  | 'legacy.resolve'

export interface ActPayload {
  memberId?: string
  targetId?: string
  post?: string
  item?: string
  pill?: string
  tech?: string
  building?: string
  npcId?: string
  stones?: number
  mission?: string
  squad?: string[]
  count?: number
}

export const ACT_CATALOG: Record<ActName, { desc: string; fn: (w: World, p: ActPayload) => boolean }> = {
  'head.set': { desc: '册立家主', fn: (w, p) => (p.memberId ? (w.assignHead(p.memberId), true) : false) },
  'member.meditate': { desc: '闭关/出关', fn: (w, p) => (p.memberId ? (w.setMeditation(p.memberId, !!p.count), true) : false) },
  'member.technique': { desc: '传功', fn: (w, p) => (p.memberId && p.tech ? (w.giveTechnique(p.memberId, p.tech), true) : false) },
  'member.equip': { desc: '装备法宝', fn: (w, p) => (p.memberId && p.item ? (w.equip(p.memberId, p.item), true) : false) },
  'member.pill': { desc: '服丹', fn: (w, p) => (p.memberId && p.pill ? (w.takePill(p.memberId, p.pill), true) : false) },
  'member.advance': { desc: '冲关', fn: (w, p) => (p.memberId ? (w.assistedBreakthrough(p.memberId), true) : false) },
  'member.marry': { desc: '指婚', fn: (w, p) => (p.memberId && p.targetId ? w.marryTo(p.memberId, p.targetId) : false) },
  'member.post': { desc: '任职/卸任', fn: (w, p) => (p.memberId ? w.assignPost(p.memberId, p.post) : false) },
  'estate.build': { desc: '营建', fn: (w, p) => (p.building ? w.build(p.building) : false) },
  'estate.upgrade': { desc: '升级', fn: (w, p) => (p.building ? w.upgrade(p.building) : false) },
  'estate.rite': { desc: '祭祖', fn: (w) => w.ancestralRite() },
  'estate.sutra': { desc: '求经', fn: (w) => w.seekSutra() },
  'market.buy': { desc: '购货', fn: (w, p) => (p.item ? buyItem(w, p.item, p.count ?? 1) : false) },
  'market.sell': { desc: '售货', fn: (w, p) => (p.item ? sellItem(w, p.item, p.count ?? 1) : false) },
  'market.tech': { desc: '购法帖', fn: (w, p) => (p.tech ? buyTechnique(w, p.tech, p.stones ?? 0) : false) },
  'craft.pill': { desc: '炼丹', fn: (w, p) => (p.item === 'ningyuan' ? w.craftPill('ningyuan') : Boolean(p.item === 'qiyuan') && w.craftPill('qiyuan')) },
  'diplomacy.gift': { desc: '赠礼', fn: (w, p) => (p.npcId ? giftNpc(w, p.npcId, p.stones ?? 0) : false) },
  'diplomacy.peace': { desc: '议和', fn: (w, p) => (p.npcId ? makePeace(w, p.npcId) : false) },
  'diplomacy.taunt': { desc: '寻衅', fn: (w, p) => (p.npcId ? w.tauntNpc(p.npcId) : false) },
  'diplomacy.marry': { desc: '联姻', fn: (w, p) => (p.npcId ? marryNpcFamily(w, p.npcId) : false) },
  'expedition.send': { desc: '遣队出征', fn: (w, p) => (p.mission ? sendMission(w, p.mission, p.squad ?? []) : false) },
  'expedition.recall': { desc: '召回', fn: (w, p) => (p.memberId ? (recallAll(w, p.memberId), true) : false) },
  'legacy.resolve': { desc: '落印定鼎', fn: (w) => (w.resolveLegacyNow(), true) }
}

export interface QueryResult {
  [k: string]: unknown
}

export class GameFacade {
  constructor(
    public readonly world: World,
    public readonly slot: number,
    private bus?: WorldEventBus
  ) {}

  act(name: ActName, payload: ActPayload = {}): boolean {
    const c = ACT_CATALOG[name]
    if (!c) return false
    return c.fn(this.world, payload)
  }

  query(ref: string): QueryResult {
    const w = this.world
    switch (ref) {
      case 'family':
        return { name: w.state.family.name, estate: w.state.family.estate, year: w.state.year, month: w.state.month, reputation: w.state.family.reputation, generation: w.state.family.generation }
      case 'members':
        return { list: w.aliveMembers().map((c) => ({ id: c.id, name: c.name, realm: `${c.realm.major}/${c.realm.minor}`, post: c.post ?? '', state: c.state, power: Math.round(combatPowerOf(w, c)) })) }
      case 'legacy':
        return resolveLegacy(w.state) as unknown as QueryResult
      case 'yearAxis':
        return { cells: yearAxis(w.state) as unknown as AxisCell[] }
      case 'systems':
        return { list: w.systemList() }
      case 'finance':
        return { stones: w.state.family.stones, accum: w.state.finance.accum, yearStats: w.state.yearStats }
      case 'plugins':
        return { list: w.pluginList() }
      default:
        return {}
    }
  }

  subscribe(on: (e: FacadeEvent) => void): () => void {
    const bus: WorldEventBus = {
      onLog: (kind: LogKind, text: string) => on({ type: 'log', kind, text, year: this.world.state.year, month: this.world.state.month }),
      onChronicle: (entry: ChronicleEntry, important: boolean) => on({ type: 'chronicle', entry, important }),
      onBattle: (log: BattleLog) => on({ type: 'battle', log }),
      onPendingEvent: (id: string) => on({ type: 'pending', id }),
      onGameOver: (reason: string) => on({ type: 'gameover', reason }),
      onYearPaper: (report: YearlyReport) => on({ type: 'paper', report }),
      onSystemChange: (id: string, enabled: boolean) => on({ type: 'sysChanged', id, enabled }),
      onPluginChange: (id: string, action: string) => on({ type: 'plugin', id, action })
    }
    this.world.out.push(bus)
    return () => {
      const i = this.world.out.indexOf(bus)
      if (i >= 0) this.world.out.splice(i, 1)
    }
  }

  about(): { title: string; version: string; modules: number; systems: number; plugins: number; packFingerprint: string } {
    return {
      title: '仙途家族志',
      version: '0.1.8',
      modules: this.world.systemList().length,
      systems: this.world.systemList().filter((s) => s.enabled).length,
      plugins: this.world.pluginList().length,
      packFingerprint: PACK.fingerprint()
    }
  }
}

export type FacadeEvent =
  | { type: 'log'; kind: LogKind; text: string; year: number; month: number }
  | { type: 'chronicle'; entry: ChronicleEntry; important: boolean }
  | { type: 'battle'; log: BattleLog }
  | { type: 'pending'; id: string }
  | { type: 'gameover'; reason: string }
  | { type: 'paper'; report: YearlyReport }
  | { type: 'sysChanged'; id: string; enabled: boolean }
  | { type: 'plugin'; id: string; action: string }

export { marketPrice, computeLegacy }
export type { SaveMeta, LegacyArch }