// vite-plugin-inline-worker-dev.ts
import { Plugin } from 'vite'
import fs from 'fs/promises'
import { build, transform } from 'esbuild'

export default function InlineWorkerDevPlugin(): Plugin {
  return {
    name: 'vite:inline-worker-dev',
    async load(id) {
      if (id.includes('?inlineWorker')) {
        const [cleanPath] = id.split('?')
        console.log('cleanPath', cleanPath)
        const code = await fs.readFile(cleanPath, 'utf-8')
        const result = await build({
          entryPoints: [cleanPath],
          bundle: true,
          write: false,
          platform: 'browser',
          format: 'iife',
          target: 'esnext',
        })
        
        const workerCode = result.outputFiles[0].text        

        const workerBlobCode = `
          const code = ${JSON.stringify(workerCode)};
          export default function InlineWorker() {
            const blob = new Blob([code], { type: 'application/javascript' });
            return new Worker(URL.createObjectURL(blob), { type: 'module' });
          }
        `
        return workerBlobCode
      }
      return null
    }
  }
}