1import esbuild, { type Plugin, type OnResolveArgs } from 'esbuild'
2import { getAppCfg } from "../k8sF/ctxF/appCfgCtxF.mts"
3import { getReqPubEnvItem } from '../../serverF/getReqPubEnvItemF.mts'
4import { pathDownJoin } from "../../serverF/pathF.mts"
5import { ptDir } from '../../serverF/ptDirF.mts'
6import { existsSync } from 'fs'
7import path from 'path'
8import { createRequire } from 'module'
9const require = createRequire(import.meta.url)
10
11const automergeAliasPlugin: Plugin = {
12  name: 'automerge-alias',
13  setup(build) {
14    const automergeCjsPath = require.resolve('@automerge/automerge')
15    const automergeDistDir = path.join(path.dirname(automergeCjsPath), '..')
16    const slimPath = path.join(automergeDistDir, 'mjs/entrypoints/slim.js')
17
18    build.onResolve({filter: /^@automerge\/automerge/}, (args: OnResolveArgs) => {
19      if (args.path === '@automerge/automerge' || args.path === '@automerge/automerge/slim') {
20        return {path: slimPath}
21      }
22      return null
23    })
24  }
25}
26
27export const doBuildWorker = async ({doWatch}: {doWatch?: boolean}={}) => {
28  const {appPath} = getAppCfg()
29
30  const ptOutPath = pathDownJoin(appPath!, 'public', getReqPubEnvItem('builtWorkerFilename') as string)
31  const baseName = (getReqPubEnvItem('builtWorkerFilename') as string).replace(/\.js$/, '')
32  const ptInPath = pathDownJoin(appPath!, 'entrypoints', `${baseName}AI.mjs`)
33  const ptInPathAlt = pathDownJoin(appPath!, 'entrypoints', `${baseName}.mjs`)
34  const resolvedInPath = existsSync(pathDownJoin(ptDir, ptInPath)) ? ptInPath : ptInPathAlt
35
36  const absOutPath = pathDownJoin(ptDir, ptOutPath)
37  const buildOptions = {
38    entryPoints: [
39      pathDownJoin(ptDir, resolvedInPath)
40    ],
41    bundle: true,
42    outfile: absOutPath,
43    format: 'esm' as const,
44    minify: true,
45    plugins: [automergeAliasPlugin],
46  }
47
48  await esbuild.build(buildOptions)
49  console.log('builtworker', resolvedInPath, '->', ptOutPath)
50
51  if (doWatch) {
52    const ctx = await esbuild.context(buildOptions)
53    await ctx.watch()
54    console.log('Watching worker for changes...')
55  }
56}
57