/**
 * 引力值迁移脚本
 * 将现有用户的多维额度合并到 gravity 字段
 * 公式: gravity = interviewCredits×5 + resumeOptimizeCredits×3 + resumeDownloadCredits×2 + shareCredits×1 + remaining×5
 * 用法: npx ts-node --project tsconfig.json scripts/migrate-gravity.ts
 */
import { NestFactory } from '@nestjs/core'
import { AppModule } from '../src/app.module'
import { getModelToken } from '@nestjs/mongoose'
import { User, UserDocument } from '../src/modules/user/user.schema'
import { Model } from 'mongoose'

async function bootstrap() {
  const app = await NestFactory.createApplicationContext(AppModule)
  const userModel = app.get<Model<UserDocument>>(getModelToken(User.name))

  const total = await userModel.countDocuments().exec()
  console.log(`Total users: ${total}`)

  let migrated = 0
  let skipped = 0
  const cursor = userModel.find().cursor()

  for await (const user of cursor) {
    const interviewVal = (user.interviewCredits ?? 0) * 5
    const optimizeVal = (user.resumeOptimizeCredits ?? 0) * 3
    const downloadVal = (user.resumeDownloadCredits ?? 0) * 2
    const oldRemainVal = (user.remaining ?? 0) * 5
    const shareVal = (user.shareCredits ?? 0) * 1
    const totalGravity = interviewVal + optimizeVal + downloadVal + oldRemainVal + shareVal

    if (totalGravity <= 0 && (user.gravity ?? 0) === 0) {
      skipped++
      continue
    }

    await userModel.findByIdAndUpdate(user._id, {
      $set: {
        gravity: Math.max(user.gravity ?? 0, totalGravity),
        interviewCredits: 0,
        resumeOptimizeCredits: 0,
        resumeDownloadCredits: 0,
        remaining: 0,
        shareCredits: 0,
      },
    }).exec()
    migrated++
  }

  console.log(`Migrated: ${migrated}, Skipped (no credits): ${skipped}`)
  await app.close()
}

bootstrap().catch(console.error)