import fs from 'fs'
import path from 'path'
import { fileURLToPath } from 'url'
import { dirname } from 'path'
import db, { initDatabase } from './database.js'

const __filename = fileURLToPath(import.meta.url)
const __dirname = dirname(__filename)

async function seedDatabase() {
  console.log('데이터베이스 초기화 중...')
  initDatabase()

  // 기존 데이터 삭제
  db.exec('DELETE FROM layers')

  // CSV 파일 읽기
  const csvPath = path.join(__dirname, '../../../LayerList.csv')
  const csvContent = fs.readFileSync(csvPath, 'utf-8')
  
  // CSV 파싱
  const lines = csvContent.split('\n')
  const headers = lines[0].split(',').map(h => h.replace(/"/g, '').trim())
  
  const insert = db.prepare(`
    INSERT INTO layers (cmn_cd, up_cmn_cd, cmn_cd_full_nm, cmn_cd_nm, cmn_cd_level, clnm)
    VALUES (?, ?, ?, ?, ?, ?)
  `)

  const insertMany = db.transaction((rows: any[]) => {
    for (const row of rows) {
      insert.run(row)
    }
  })

  const rows = []
  
  for (let i = 1; i < lines.length; i++) {
    const line = lines[i].trim()
    if (!line) continue

    // CSV 파싱 (쉼표로 구분, 따옴표 처리)
    const values = []
    let current = ''
    let inQuotes = false

    for (let j = 0; j < line.length; j++) {
      const char = line[j]
      
      if (char === '"') {
        inQuotes = !inQuotes
      } else if (char === ',' && !inQuotes) {
        values.push(current.trim())
        current = ''
      } else {
        current += char
      }
    }
    values.push(current.trim())

    // NULL 값 처리
    const row = values.map(v => {
      if (v === 'NULL' || v === '') return null
      return v.replace(/"/g, '')
    })

    if (row.length >= 6) {
      rows.push([
        row[0], // cmn_cd
        row[1], // up_cmn_cd
        row[2], // cmn_cd_full_nm
        row[3], // cmn_cd_nm
        parseInt(row[4] || '0'), // cmn_cd_level
        row[5], // clnm
      ])
    }
  }

  console.log(`${rows.length}개의 레이어 데이터 삽입 중...`)
  insertMany(rows)

  console.log('시드 완료!')
  
  // 결과 확인
  const count = db.prepare('SELECT COUNT(*) as count FROM layers').get() as { count: number }
  console.log(`총 ${count.count}개의 레이어가 저장되었습니다.`)
  
  db.close()
}

seedDatabase().catch(console.error)