import { GameState } from '../../types/domain'
import { MAJOR_ORDER } from '../../data/realms'

export interface LegacyDims {
  renXing: number
  daoXing: number
  weiMing: number
  xiangHuo: number
  total: number
}

export interface LegacyArch {
  title: string
  poem: string[]
  dims: LegacyDims
  rank: number
  verdict: string
}

export const VERDICTS: Record<string, { title: string; poem: string[] }> = {
  feisheng: {
    title: '飞升之资',
    poem: ['海内升龙真气象，仙班亦录旧香名。', '遥看青山埋骨处，一脉烟霞送飞鸿。']
  },
  celestial: {
    title: '仙朝遗脉',
    poem: ['祖庭灯火三千里，曾照中天玉斗垂。', '后世儿孙开卷处，犹闻钟鼎旧清音。']
  },
  noble: {
    title: '中州望族',
    poem: ['钟鸣鼎食三百年，莫道朱门无圣贤。', '一炷心香传世绪，青灯犹自照芸编。']
  },
  warlord: {
    title: '一方枭雄',
    poem: ['剑气纵横镇八荒，家声不堕尽金汤。', '而今若问兴亡事，半壁江山问晚霜。']
  },
  recluse: {
    title: '隐世大族',
    poem: ['不向尘沙争利名，青山深处课桑耕。', '子孙自有莲舟意，一棹烟波到洞庭。']
  },
  modest: {
    title: '积余之家',
    poem: ['檐下燕飞春复秋，园蔬新雨补梁楸。', '粗茶淡饭家声在，犹胜浮云逐海流。']
  },
  dust: {
    title: '冢中枯骨',
    poem: ['一度花开一度尘，纸灰飞作旧人魂。', '若教重理当年事，且把残篇问故园。']
  }
}

const RANK_MAP: [number, string][] = [
  [160, 'celestial'],
  [120, 'noble'],
  [85, 'warlord'],
  [55, 'recluse'],
  [30, 'modest']
]

export function computeLegacy(s: GameState): LegacyDims {
  const st = s.stats
  const gens = Math.max(
    ...Object.values(s.members).map((c) => c.generation).concat(1)
  )
  const renXing = Math.round(gens * 18 + Math.min(st.popPeak, 40) * 1.6)
  const daoXing = Math.round(st.maxRealmIdx * 26 + st.techniqueGrand * 4)
  const weiMing = Math.round(st.repPeak * 1.4 + (st.tourneyBest ? (6 - st.tourneyBest) * 12 : 0))
  const xiangHuo = Math.round(Math.min(s.year, 300) * 0.9 + st.feishengCount * 60)
  return { renXing, daoXing, weiMing, xiangHuo, total: renXing + daoXing + weiMing + xiangHuo }
}

export function resolveLegacy(s: GameState): LegacyArch {
  const dims = computeLegacy(s)
  let key = 'dust'
  if (s.stats.feishengCount > 0) key = 'feisheng'
  else {
    for (const [need, k] of RANK_MAP) {
      if (dims.total >= need) {
        key = k
        break
      }
    }
  }
  const verdict = VERDICTS[key]
  return { title: verdict.title, poem: verdict.poem, dims, rank: dims.total, verdict: key }
}

export function peakRealmIndex(members: GameState['members']): number {
  let max = -1
  for (const c of Object.values(members)) {
    const idx = MAJOR_ORDER.indexOf(c.realm.major) * 10 + c.realm.minor
    if (idx > max) max = idx
  }
  return max
}

export function grandTechniqueCount(members: GameState['members']): number {
  let n = 0
  for (const c of Object.values(members)) {
    if ((c.techniqueRank ?? 0) >= 2) n++
  }
  return n
}