import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { runBuild } from "./build.ts";
import { runTypecheck } from "./types.ts";
import { assertReachability } from "./reachability.ts";

async function runScript(root: string, name: string): Promise<void> {
  const child = Bun.spawn(["bun", "run", name], {
    cwd: root,
    stdin: "inherit",
    stdout: "inherit",
    stderr: "inherit",
  });
  const code = await child.exited;
  if (code !== 0) throw new Error(`WRN-CHECK: '${name}' failed with exit code ${code}`);
}

/** Canonical generated-artifact-aware application verification pipeline. */
export async function runCheck(appRoot: string): Promise<void> {
  const root = resolve(appRoot);
  const manifest = JSON.parse(readFileSync(resolve(root, "package.json"), "utf8")) as {
    scripts?: Record<string, string>;
  };
  assertReachability(root);
  await runBuild(root);
  if (manifest.scripts?.typecheck) await runScript(root, "typecheck");
  else if (!(await runTypecheck(root))) throw new Error("WRN-CHECK: application typecheck failed");
  for (const name of ["lint", "test", "format:check"] as const) {
    if (manifest.scripts?.[name]) await runScript(root, name);
  }
}