import { readFileSync, writeFileSync, existsSync } from 'node:fs'
import { join } from 'node:path'

const dataDir = './server/data'

function getFilePath(collection) {
  const fileMap = {
    works: 'works.json',
    publications: 'publications.json',
    events: 'events.json',
    releases: 'releases.json',
    talks: 'talks.json'
  }
  return join(dataDir, fileMap[collection] || `${collection}.json`)
}

export default defineEventHandler(async (event) => {
  const method = event.method
  const collection = event.context.params?.collection
  const id = event.context.params?.id

  if (!collection || !id) {
    throw createError({ statusCode: 400, message: 'Collection and ID required' })
  }

  const filePath = getFilePath(collection)

  if (!existsSync(filePath)) {
    throw createError({ statusCode: 404, message: 'Collection not found' })
  }

  const readData = () => {
    try {
      return JSON.parse(readFileSync(filePath, 'utf-8'))
    } catch {
      return []
    }
  }

  const writeData = (data) => {
    writeFileSync(filePath, JSON.stringify(data, null, 2))
  }

  if (method === 'DELETE') {
    const data = readData()
    const filtered = data.filter(item => item.id !== id)
    writeData(filtered)
    return { success: true }
  }

  throw createError({ statusCode: 405, message: 'Method not allowed' })
})