effect-http.ts

import { httpApp, response, router } from "@effect-http/core"
import { decodeParams } from "@effect-http/core/schema"
import { serve } from "@effect-http/node"
import { pipe } from "@effect/data/Function"
import * as Effect from "@effect/io/Effect"
import * as Schema from "@effect/schema/Schema"
import * as Http from "http"

const app = pipe(
  router
    .route("GET", "/health", Effect.succeed(response.json({ ok: true })))
    .route(
      "GET",
      "/params",
      pipe(
        decodeParams(
          Schema.struct({
            id: Schema.string,
            query: Schema.string,
          }),
        ),
        Effect.map(({ id, query }) => response.json({ id, query })),
      ),
    )
    .toHttpApp(),

  httpApp.catchTags({
    DecodeSchemaError: () =>
      Effect.succeed(response.text("Bad request", { status: 400 })),

    RouteNotFound: () =>
      Effect.succeed(response.text("Not found", { status: 404 })),
  }),
)

pipe(
  app,
  serve(() => Http.createServer(), { port: 3000 }),
  Effect.runPromise,
)