import fs from "node:fs/promises";
import path from "node:path";
import { describe, expect, it } from "vitest";

const TASK_ROOT = path.resolve(import.meta.dirname);
const SRC_ROOT = path.resolve(TASK_ROOT, "..");

const RAW_TASK_MUTATORS = [
  "createTaskRecord",
  "markTaskRunningByRunId",
  "markTaskTerminalByRunId",
  "markTaskTerminalById",
  "setTaskRunDeliveryStatusByRunId",
] as const;

const ALLOWED_CALLERS = new Set([
  "tasks/task-executor.ts",
  "tasks/task-registry.ts",
  "tasks/task-registry.maintenance.ts",
]);

async function listSourceFiles(root: string): Promise<string[]> {
  const entries = await fs.readdir(root, { withFileTypes: true });
  const files: string[] = [];
  for (const entry of entries) {
    const fullPath = path.join(root, entry.name);
    if (entry.isDirectory()) {
      files.push(...(await listSourceFiles(fullPath)));
      continue;
    }
    if (!entry.isFile() || !entry.name.endsWith(".ts") || entry.name.endsWith(".test.ts")) {
      continue;
    }
    files.push(fullPath);
  }
  return files;
}

describe("task executor boundary", () => {
  it("keeps raw task lifecycle mutators behind task internals", async () => {
    const offenders: string[] = [];
    for (const file of await listSourceFiles(SRC_ROOT)) {
      const relative = path.relative(SRC_ROOT, file).replaceAll(path.sep, "/");
      if (ALLOWED_CALLERS.has(relative)) {
        continue;
      }
      const source = await fs.readFile(file, "utf8");
      for (const symbol of RAW_TASK_MUTATORS) {
        if (source.includes(`${symbol}(`)) {
          offenders.push(`${relative}:${symbol}`);
        }
      }
    }
    expect(offenders).toEqual([]);
  });
});