import assert from "node:assert/strict";
import { spawn } from "node:child_process";
import { once } from "node:events";
import { resolve } from "node:path";
import test from "node:test";
import { ImageClient } from "../src/client";
import { startImage } from "./server";

test(
  "the real REPL mutates the same WebSocket image and notifies the inspection client",
  { timeout: 10000 },
  async (t) => {
    const image = await startImage();
    let inspector: ImageClient | undefined;
    t.after(async () => {
      inspector?.close();
      await image.stop();
    });
    const revisions: bigint[] = [];
    let onChanged = () => {};
    const changed = new Promise<void>((resolve) => {
      onChanged = resolve;
    });
    inspector = await ImageClient.connect(
      image.address,
      (error) => assert.equal(error, undefined),
      (revision) => {
        revisions.push(revision);
        onChanged();
      },
    );
    const executable = resolve(
      __dirname,
      "../../../target/debug",
      process.platform === "win32" ? "runa-cli.exe" : "runa-cli",
    );
    const repl = spawn(executable, [], {
      env: { ...process.env, RUNA_CONNECT: image.address },
      stdio: ["pipe", "pipe", "pipe"],
    });
    t.after(() => {
      if (repl.exitCode === null && repl.signalCode === null) repl.kill();
    });
    let stdout = "";
    let stderr = "";
    repl.stdout.on("data", (chunk: Buffer) => {
      stdout += chunk.toString();
    });
    repl.stderr.on("data", (chunk: Buffer) => {
      stderr += chunk.toString();
    });
    const exited = once(repl, "exit");
    repl.stdin.end(
      [
        "let actor = spawn counter 5",
        'send actor {"op":"add","value":7}',
        "tick 100",
        "inspect actor",
        "quit",
      ].join("\n") + "\n",
    );
    const [code] = await exited;
    assert.equal(code, 0, stderr);
    assert.doesNotMatch(stdout, /error:/i);
    await changed;
    assert.ok(revisions.length > 0);
    const [actor] = await inspector.listActors();
    assert.ok(actor);
    assert.ok(stdout.includes(actor.actor_ref));
    assert.deepEqual(actor.state, { type: "integer", data: 12n });
    assert.deepEqual(actor.queued, []);
    assert.equal(actor.reserved, null);
    const overridden = spawn(executable, ["--connect", image.address], {
      env: { ...process.env, RUNA_CONNECT: "invalid" },
      stdio: ["pipe", "pipe", "pipe"],
    });
    t.after(() => {
      if (overridden.exitCode === null && overridden.signalCode === null) overridden.kill();
    });
    const overriddenExit = once(overridden, "exit");
    overridden.stdin.end("actors\nquit\n");
    const [overrideCode] = await overriddenExit;
    assert.equal(overrideCode, 0);
  },
);