import express from 'express'
import cors from 'cors'
import esbuild from 'esbuild'
import fs from 'node:fs'
import path from 'node:path'
import url from 'node:url'

const __dirname = path.dirname(url.fileURLToPath(import.meta.url))
const PROJECT_ROOT = path.resolve(__dirname, '..', '..')
const CONFIG_DIR = path.join(PROJECT_ROOT, 'assets/script/game/common/config')
const EXPORT_PATH = path.join(CONFIG_DIR, 'hexport.ts')
const DATA_DIR = path.join(__dirname, 'data')
const HEROES_PATH = path.join(DATA_DIR, 'heroes.json')

const app = express()
app.use(cors())
app.use(express.json({ limit: '5mb' }))

/** 编译配置 TS 文件为可执行 CJS，返回模块 exports */
async function loadConfigModule(file) {
  const result = await esbuild.build({
    entryPoints: [path.join(CONFIG_DIR, file)],
    bundle: true,
    write: false,
    format: 'cjs',
    platform: 'node',
    target: 'node18',
    external: ['cc'],
    logLevel: 'silent',
  })
  const code = result.outputFiles[0].text
  const module = { exports: {} }
  // 屏蔽对 cc 的引用（v3 等）
  const fn = new Function('module', 'exports', 'require', code)
  fn(module, module.exports, () => ({ v3: () => ({}) }))
  return module.exports
}

let cache = null

async function buildCache() {
  const [skill, buff, hero] = await Promise.all([
    loadConfigModule('SkillSet.ts'),
    loadConfigModule('BuffSet.ts'),
    loadConfigModule('heroSet.ts'),
  ])
  cache = {
    SkillSet: skill.SkillSet,
    FieldSkillSet: skill.FieldSkillSet,
    BuffList: buff.BuffList,
    HERO_ROLE_BASE: hero.HERO_ROLE_BASE,
    HERO_GROW_COEF: hero.HERO_GROW_COEF,
    HERO_LV12_SPECIAL_ATTR: hero.HERO_LV12_SPECIAL_ATTR,
    AtkSpeedSet: hero.AtkSpeedSet,
    HeroDisVal: hero.HeroDisVal,
  }
  return cache
}

app.get('/api/meta', async (_req, res) => {
  try {
    if (!cache) await buildCache()
    res.json(cache)
  } catch (e) {
    res.status(500).json({ error: String(e?.message || e) })
  }
})

app.post('/api/refresh', async (_req, res) => {
  try {
    await buildCache()
    res.json({ ok: true })
  } catch (e) {
    res.status(500).json({ error: String(e?.message || e) })
  }
})

/** 英雄数据持久化：GET 读取（无文件时返回空列表） */
app.get('/api/heroes', (_req, res) => {
  try {
    if (!fs.existsSync(HEROES_PATH)) return res.json({ heroes: [] })
    res.json(JSON.parse(fs.readFileSync(HEROES_PATH, 'utf8')))
  } catch (e) {
    res.status(500).json({ error: String(e?.message || e) })
  }
})

/** 英雄数据持久化：POST 全量覆盖保存 */
app.post('/api/heroes', (req, res) => {
  const heroes = req.body?.heroes
  if (!Array.isArray(heroes)) {
    return res.status(400).json({ error: 'heroes 必须为数组' })
  }
  try {
    fs.mkdirSync(DATA_DIR, { recursive: true })
    fs.writeFileSync(HEROES_PATH, JSON.stringify({ heroes }, null, 2), 'utf8')
    res.json({ ok: true, path: HEROES_PATH, count: heroes.length })
  } catch (e) {
    res.status(500).json({ error: String(e?.message || e) })
  }
})

/** 序列化 overrides：TGroup 以字符串存储（如 "Team"），导出时还原为枚举表达式 TGroup.Team */
function serializeOverrides(o) {
  return JSON.stringify(o).replace(/"TGroup":\s*"(\w+)"/g, '"TGroup": TGroup.$1')
}

/** 生成 hexport.ts 内容 */
function renderHeroTs(heroes) {
  const nl = '\n'
  let out = ''
  out += `/**${nl}`
  out += ` * 英雄配置导出文件 - 由英雄配置编辑器生成${nl}`
  out += ` * 生成时间: ${new Date().toISOString()}${nl}`
  out += ` * 使用方式: import { HexportHeroInfo } from "./hexport" 后合并进 HeroInfo${nl}`
  out += ` */${nl}`
  out += `import { v3 } from "cc"${nl}`
  out += `import { FacSet } from "./GameSet"${nl}`
  out += `import { TGroup } from "./SkillSet"${nl}`
  out += `import { SkillLv, HType, HGrowType, HRole, HERO_ROLE_BASE, AtkSpeedSet, AtkSpeedLv, heroInfo } from "./heroSet"${nl}`
  out += nl
  out += `export const HexportHeroInfo: Record<number, heroInfo> = {${nl}`
  for (const h of heroes) {
    out += renderSingleHero(h)
  }
  out += `}${nl}`
  return out
}

function renderSingleHero(h) {
  const lines = []
  const indent = '    '
  const push = (s) => lines.push(indent + s)
  push(`// ${h.uuid} ${h.name} — ${h.comment || ''}`)
  push(`${h.uuid}: {`)
  const roleExpr = `HERO_ROLE_BASE[HRole.${h.roleKey}]`
  const stat = (k) => {
    const base = h.statBase?.[k] ?? 0
    if (base === 0) return `${roleExpr}.${k}`
    return `${roleExpr}.${k} ${base > 0 ? '+' : '-'} ${Math.abs(base)}`
  }
  push(
    `    uuid: ${h.uuid}, name: ${JSON.stringify(h.name)}, path: ${JSON.stringify(h.path)}, fac: FacSet.HERO, rarity: ${h.rarity}, lv: 1, type: HType.${h.typeKey}, grow_type: HGrowType.${h.growKey}, role: HRole.${h.roleKey}, hp: ${stat('hp')}, ap: ${stat('ap')}, def: ${stat('def')},`
  )
  if (h.dis != null) push(`    dis: ${h.dis},`)
  if (h.speed != null) push(`    speed: ${h.speed},`)

  // skills
  push(`    skills: {`)
  for (const sk of h.skills) {
    const parts = [`uuid: ${sk.uuid}`]
    if (sk.name) parts.push(`name: ${JSON.stringify(sk.name)}`)
    parts.push(`lv: 1`)
    parts.push(`cd: ${sk.cdExpr || sk.cd}`)
    parts.push(`ccd: 0`)
    if (sk.overrides && Object.keys(sk.overrides).length) parts.push(`overrides: ${serializeOverrides(sk.overrides)}`)
    if (sk.desc) parts.push(`desc: ${JSON.stringify(sk.desc)}`)
    if (sk.lv_entries?.length) {
      push(`        ${sk.uuid}: { ${parts.join(', ')},`)
      push(`            lv_entries: [`)
      for (const e of sk.lv_entries) {
        const eparts = [`lv: ${e.lv}`]
        if (e.s_lv) eparts.push(`s_lv: SkillLv.Lv${e.s_lv}`)
        if (e.overrides && Object.keys(e.overrides).length) eparts.push(`overrides: ${serializeOverrides(e.overrides)}`)
        if (e.desc) eparts.push(`desc: ${JSON.stringify(e.desc)}`)
        push(`                { ${eparts.join(', ')} },`)
      }
      push(`            ],`)
      push(`        },`)
    } else {
      push(`        ${sk.uuid}: { ${parts.join(', ')} },`)
    }
  }
  push(`    },`)

  // triggers
  const triggerKeys = ['atking', 'atked', 'fstart', 'dead']
  for (const tk of triggerKeys) {
    const grp = h[tk]
    if (!grp || !Object.keys(grp).length) continue
    push(`    ${tk}: {`)
    for (const [sid, entries] of Object.entries(grp)) {
      push(`        ${sid}: [`)
      for (const e of entries) {
        const eparts = [`lv: ${e.lv}`]
        if (e.s_lv) eparts.push(`s_lv: SkillLv.Lv${e.s_lv}`)
        if (e.name) eparts.push(`name: ${JSON.stringify(e.name)}`)
        eparts.push(`t_num: ${e.t_num}`)
        if (e.overrides && Object.keys(e.overrides).length) eparts.push(`overrides: ${serializeOverrides(e.overrides)}`)
        if (e.desc) eparts.push(`desc: ${JSON.stringify(e.desc)}`)
        push(`            { ${eparts.join(', ')} },`)
      }
      push(`        ],`)
    }
    push(`    },`)
  }

  // field
  if (h.field?.length) {
    push(`    field: [`)
    for (const f of h.field) {
      const uuids = f.uuids.map((u) => {
        const uparts = [`uuid: ${u.uuid}`, `value: ${u.value}`]
        if (u.name) uparts.push(`name: ${JSON.stringify(u.name)}`)
        return `{ ${uparts.join(', ')} }`
      })
      const desc = f.desc ? `, desc: ${JSON.stringify(f.desc)}` : ''
      push(`        { lv: ${f.lv}, uuids: [${uuids.join(', ')}]${desc} },`)
    }
    push(`    ],`)
  }

  // 复活已纳入 dead 触发组，通过 dead 编辑器的 overrides 配置 revive_hp / revive_count
  // 不再导出独立的 revive 字段

  // bonuses
  for (const bk of ['ap_bonus', 'hp_bonus', 'def_bonus']) {
    if (!h[bk]?.length) continue
    push(`    ${bk}: [`)
    for (const b of h[bk]) push(`        { lv: ${b.lv}, value: ${b.value} },`)
    push(`    ],`)
  }

  push(`    info: ${JSON.stringify(h.info || '')},`)
  push(`},`)
  return lines.join('\n') + '\n'
}

app.post('/api/export', (req, res) => {
  try {
    const heroes = req.body?.heroes
    if (!Array.isArray(heroes) || !heroes.length) {
      return res.status(400).json({ error: 'heroes 不能为空' })
    }
    const content = renderHeroTs(heroes)
    fs.writeFileSync(EXPORT_PATH, content, 'utf8')
    res.json({ ok: true, path: EXPORT_PATH, bytes: Buffer.byteLength(content) })
  } catch (e) {
    res.status(500).json({ error: String(e?.message || e) })
  }
})

app.get('/api/export', (_req, res) => {
  if (!fs.existsSync(EXPORT_PATH)) return res.status(404).json({ error: '尚未生成' })
  res.setHeader('Content-Type', 'text/plain; charset=utf-8')
  res.send(fs.readFileSync(EXPORT_PATH, 'utf8'))
})

const PORT = 3001
app.listen(PORT, () => {
  console.log(`[hero-config-tool] server listening http://localhost:${PORT}`)
  console.log(`[hero-config-tool] export path: ${EXPORT_PATH}`)
})