import fs from 'fs'

const path = new URL('../src/api/biz.ts', import.meta.url)
let s = fs.readFileSync(path, 'utf8')

if (!s.includes("from './sjnmtybt/realBiz'")) {
  s = s.replace(
    "import {\n  mockAccounts,",
    "import * as real from './sjnmtybt/realBiz'\nimport {\n  mockAccounts,",
  )
}

const pairs = [
  ['fetchDashboard', 'params'],
  ['fetchVillageBatches', ''],
  ['fetchPeople', 'params'],
  ['savePerson', 'payload'],
  ['submitVillageBatch', 'batchId'],
  ['fetchInsuranceBatches', ''],
  ['fetchInsuranceResults', 'params'],
  ['triggerInsuranceMatch', 'batchIds'],
  ['confirmInsuranceManual', 'personId'],
  ['submitToLeader', 'batchId'],
  ['exportCompareList', '_batchId'],
  ['returnBatchToTown', 'batchId, reason'],
  ['fetchApprovals', 'params'],
  ['reviewPersonQualify', 'payload'],
  ['decideApproval', 'payload'],
  ['fetchStatusBatches', ''],
  ['fetchStandards', 'town'],
  ['createStandard', 'payload'],
  ['updateStandard', 'payload'],
  ['updateDeathStatus', 'deathId'],
  ['applyPersonStatusAction', 'payload'],
  ['fetchSpecials', ''],
  ['fetchDeaths', ''],
  ['createDeathRecord', 'payload'],
  ['createSpecialBiz', 'payload'],
  ['exportSpecialSummary', 'type'],
  ['triggerAdjustReissue', 'town'],
  ['fetchAdjustReissueRoster', 'params'],
  ['fetchVillageMonthlyBatches', 'town'],
  ['fetchMonthlyBatches', ''],
  ['calculateMonthly', ''],
  ['confirmMonthly', 'id'],
  ['exportMonthlyFile', 'id'],
  ['issueVillageMonthlyDisk', 'batchId'],
  ['confirmVillageMonthlyReturn', 'payload'],
  ['fetchDisks', 'town'],
  ['exportDisk', ''],
  ['confirmReturnDisk', 'payload'],
  ['uploadReturnDiskFile', 'payload'],
  ['fetchDiskFailPeople', 'diskId'],
  ['confirmDiskFailPaid', 'failPersonId'],
  ['archiveToNextMonth', 'id'],
  ['fetchAlerts', ''],
  ['handleAlert', 'payload, result'],
  ['fetchReportBatches', ''],
  ['fetchAccounts', ''],
  ['fetchOpLogs', ''],
]

const lines = s.split('\n')
const out = []
let i = 0
let patched = 0

while (i < lines.length) {
  const line = lines[i]
  const m = line.match(/^export function (\w+)/)
  if (!m) {
    out.push(line)
    i++
    continue
  }
  const fname = m[1]
  const pair = pairs.find((p) => p[0] === fname)
  let j = i
  let brace = 0
  let started = false
  const block = []
  while (j < lines.length) {
    const L = lines[j]
    block.push(L)
    for (const ch of L) {
      if (ch === '{') {
        brace++
        started = true
      }
      if (ch === '}') brace--
    }
    j++
    if (started && brace === 0) break
  }
  if (!pair) {
    out.push(...block)
    i = j
    continue
  }
  let body = block.join('\n')
  const args = pair[1]
  const call = args ? `return real.${fname}(${args})` : `return real.${fname}()`
  // Replace the final real-api return (get/post) after mock branch
  const next = body.replace(/\n  return (?:get|post)[\s\S]*$/m, `\n  ${call}`)
  if (next !== body) patched++
  out.push(...next.split('\n'))
  i = j
}

fs.writeFileSync(path, out.join('\n'))
console.log('patched functions:', patched)