/**
 * 生产 11 位构建号：YYYYMMDD（8）+ 当日第几次构建（3 位 001~999）
 * 状态存 build/build-sequence.json，结果写 src/config/buildId.json
 * 在 npm prebuild 时执行（仅正式 vite build 前，dev 不跑）
 */
import fs from 'node:fs'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const root = path.resolve(__dirname, '..')
const statePath = path.join(root, 'build', 'build-sequence.json')
const outPath = path.join(root, 'src', 'config', 'buildId.json')

const now = new Date()
const y = now.getFullYear()
const m = String(now.getMonth() + 1).padStart(2, '0')
const d = String(now.getDate()).padStart(2, '0')
const ymd8 = `${y}${m}${d}`
const todayKey = `${y}-${m}-${d}`

let state = { date: todayKey, daySeq: 0 }
if (fs.existsSync(statePath)) {
  try {
    const prev = JSON.parse(fs.readFileSync(statePath, 'utf8'))
    if (prev && typeof prev === 'object') {
      state.date = prev.date || todayKey
      state.daySeq = Number.isFinite(prev.daySeq) ? prev.daySeq : 0
    }
  } catch { /* 忽略损坏文件 */ }
}

if (state.date === todayKey) {
  state.daySeq = (state.daySeq || 0) + 1
} else {
  state.date = todayKey
  state.daySeq = 1
}
if (state.daySeq > 999) {
  console.warn('[bump-build-id] 当日构建已超过 999 次，已钳位为 999')
  state.daySeq = 999
}

const buildId = `${ymd8}${String(state.daySeq).padStart(3, '0')}`

fs.mkdirSync(path.dirname(statePath), { recursive: true })
fs.writeFileSync(statePath, JSON.stringify(state, null, 2), 'utf8')
fs.mkdirSync(path.dirname(outPath), { recursive: true })
fs.writeFileSync(
  outPath,
  JSON.stringify(
    { buildId, generatedAt: new Date().toISOString() },
    null,
    2,
  ),
  'utf8',
)
console.log(`[bump-build-id] buildId=${buildId}`)