import { loadEnvConfig } from '@next/env'

loadEnvConfig(process.cwd())

const CONFIRM_TOKEN = 'sync-product-inventory-snapshot'

function arg(name: string) {
  const prefix = `--${name}=`
  return process.argv.slice(2).find((value) => value.startsWith(prefix))?.slice(prefix.length) ?? ''
}

function required(name: string) {
  const value = process.env[name]?.trim()
  if (!value) throw new Error(`${name} is required.`)
  return value
}

function identity(url: string) {
  const parsed = new URL(url)
  return [
    parsed.protocol.replace(':', ''),
    decodeURIComponent(parsed.username || ''),
    parsed.hostname,
    parsed.port || '',
    parsed.pathname.replace(/^\//, ''),
    parsed.searchParams.get('schema') ?? '',
  ].join('|')
}

function sourceIdentity() {
  return [
    'sqlserver',
    required('JST_REPORT_DB_USER'),
    required('JST_REPORT_DB_HOST'),
    process.env.JST_REPORT_DB_PORT?.trim() || '1433',
    required('JST_REPORT_DB_NAME'),
    process.env.JST_REPORT_DB_SCHEMA?.trim() || 'rpt',
  ].join('|')
}

async function main() {
  if (!process.argv.includes('--apply') || arg('confirm') !== CONFIRM_TOKEN) {
    throw new Error(`写入商品库存快照需要 --apply 和 --confirm=${CONFIRM_TOKEN}`)
  }
  const databaseUrl = required('DATABASE_URL')
  if (arg('expected-database-identity') !== identity(databaseUrl)) {
    throw new Error('expected database identity mismatch')
  }
  if (arg('expected-source-database-identity') !== sourceIdentity()) {
    throw new Error('expected source identity mismatch')
  }

  const { prisma } = await import('../src/lib/prisma')
  const { productInventorySnapshotService } = await import(
    '../src/server/services/product-inventory-snapshot.service'
  )
  try {
    console.log(JSON.stringify({ stage: 'start' }))
    const result = await productInventorySnapshotService.sync()
    console.log(JSON.stringify({ stage: 'completed', ...result }, null, 2))
  } finally {
    await prisma.$disconnect()
  }
}

void main().catch((error) => {
  console.error(error instanceof Error ? error.message : String(error))
  process.exitCode = 1
})