import { execFile } from "node:child_process"

const TYPESCRIPT_PACKAGE = "typescript@^7.0.2"
const MAX_COMPILER_OUTPUT_BYTES = 10 * 1024 * 1024

/**
 * Runs the project's configured TypeScript check with TypeScript 7.
 *
 * @param cwd Project directory containing the TypeScript configuration.
 */
export function typecheckProject(cwd: string) {
  return new Promise<void>((resolve, reject) => {
    execFile(
      "bunx",
      ["--package", TYPESCRIPT_PACKAGE, "tsc", "--noEmit"],
      { cwd, encoding: "utf8", maxBuffer: MAX_COMPILER_OUTPUT_BYTES },
      (error, stdout, stderr) => {
        if (!error) {
          resolve()
          return
        }

        reject(
          new Error(
            [stdout, stderr]
              .map((output) => output.trim())
              .filter(Boolean)
              .join("\n") || "TypeScript typecheck failed.",
            { cause: error },
          ),
        )
      },
    )
  })
}