import { codexQueuesQueryForTest } from "./src/code-queue";

type JsonRecord = Record<string, unknown>;

function assertCondition(condition: unknown, message: string, detail: JsonRecord = {}): void {
  if (!condition) throw new Error(`${message}: ${JSON.stringify(detail)}`);
}

function asRecord(value: unknown): JsonRecord {
  assertCondition(typeof value === "object" && value !== null && !Array.isArray(value), "expected JSON object", { value });
  return value as JsonRecord;
}

function asArray(value: unknown): unknown[] {
  assertCondition(Array.isArray(value), "expected JSON array", { value });
  return value as unknown[];
}

function fixtureResponse(): JsonRecord {
  return {
    ok: true,
    status: 200,
    body: {
      ok: true,
      queue: {
        total: 4,
        queueCount: 3,
        activeQueueIds: ["alpha"],
        activeTaskIds: ["task-running"],
        queuedTaskIds: ["task-queued"],
        counts: { running: 1, queued: 2, succeeded: 1 },
        unreadTerminal: 1,
        executionDiagnostics: {
          state: "split-brain",
          splitBrain: true,
          heartbeatFreshTaskIds: ["task-running"],
          databaseActiveTaskCount: 1,
          databaseActiveTaskIds: ["task-running"],
          schedulerActiveRunSlotCount: 1,
          schedulerActiveTaskIds: ["task-running"],
        },
      },
      queues: [
        {
          id: "alpha",
          name: "Alpha",
          total: 1,
          counts: { running: 1, queued: 0 },
          unreadTerminal: 0,
          activeTaskId: "task-running",
          runnableTaskId: null,
          updatedAt: "2026-05-20T00:00:00.000Z",
        },
        {
          id: "beta",
          name: "Beta",
          total: 2,
          counts: { running: 0, queued: 2 },
          unreadTerminal: 0,
          activeTaskId: null,
          runnableTaskId: "task-queued",
          updatedAt: "2026-05-20T00:01:00.000Z",
        },
        {
          id: "gamma",
          name: "Gamma",
          total: 1,
          counts: { succeeded: 1 },
          unreadTerminal: 1,
          activeTaskId: null,
          runnableTaskId: null,
          updatedAt: "2026-05-20T00:02:00.000Z",
        },
      ],
    },
  };
}

function assertQueuesShape(label: string, result: unknown, expectedView: string): void {
  const data = asRecord(result);
  const queues = asRecord(data.queues);
  assertCondition(queues.view === expectedView, `${label} view mismatch`, queues);
  const items = asArray(queues.items);
  assertCondition(items.length === 3, `${label} must expose queue rows at data.queues.items[]`, queues);
  const first = asRecord(items[0]);
  assertCondition(first.id === "alpha", `${label} first item id mismatch`, first);
  const firstCounts = asRecord(first.counts);
  assertCondition(firstCounts.running === 1, `${label} item counts should be preserved`, first);
  const counts = asRecord(queues.counts);
  assertCondition(counts.running === 1 && counts.queued === 2, `${label} global counts should be preserved`, counts);
  const diagnostics = asRecord(queues.executionDiagnostics);
  assertCondition(diagnostics.state === "split-brain", `${label} executionDiagnostics should be preserved`, diagnostics);
  assertCondition(diagnostics.splitBrainLive === true, `${label} split-brain live should remain explicitly true`, diagnostics);
  assertCondition(diagnostics.effectiveLiveness === "live", `${label} diagnostics should retain derived liveness`, diagnostics);
  assertCondition(diagnostics.recommendedAction === "continue-supervision", `${label} split-brain live should continue supervision`, diagnostics);
  assertCondition(Array.isArray(queues.activeTaskIds), `${label} activeTaskIds should be present`, queues);
  assertCondition(Array.isArray(queues.queuedTaskIds), `${label} queuedTaskIds should be present`, queues);
}

export function runCodeQueueQueuesShapeContract(): JsonRecord {
  const fetcher = (path: string): JsonRecord => {
    assertCondition(path === "/api/microservices/code-queue/proxy/api/queues", "codex queues should use stable proxy path", { path });
    return fixtureResponse();
  };

  const summary = codexQueuesQueryForTest([], fetcher);
  assertQueuesShape("summary", summary, "summary");
  const summaryQueues = asRecord(asRecord(summary).queues);
  assertCondition(summaryQueues.deprecatedFullArray === undefined, "summary should not expose deprecated full array compatibility field", summaryQueues);

  const full = codexQueuesQueryForTest(["--full"], fetcher);
  assertQueuesShape("full", full, "full");
  const fullQueues = asRecord(asRecord(full).queues);
  assertCondition(!Array.isArray(fullQueues), "full queues payload must be an object, not the deprecated array shape", fullQueues);
  assertCondition(fullQueues.bounded === false, "full without --limit should preserve complete queue listing semantics", fullQueues);
  const deprecatedFullArray = asArray(fullQueues.deprecatedFullArray);
  assertCondition(deprecatedFullArray.length === 3, "full should expose deprecated array only under a compatibility field", fullQueues);
  const compatibility = asRecord(fullQueues.compatibility);
  assertCondition(compatibility.stablePath === "data.queues.items[]", "compatibility metadata should document stable path", compatibility);
  assertCondition(compatibility.deprecated === true, "compatibility metadata should mark old array path deprecated", compatibility);

  const limitedFull = codexQueuesQueryForTest(["--full", "--limit", "2"], fetcher);
  const limitedFullQueues = asRecord(asRecord(limitedFull).queues);
  assertCondition(limitedFullQueues.bounded === true, "full with explicit --limit should be bounded", limitedFullQueues);
  assertCondition(asArray(limitedFullQueues.items).length === 2, "full with explicit --limit should limit data.queues.items[]", limitedFullQueues);

  return {
    ok: true,
    checks: [
      "summary data.queues.items[] shape",
      "summary queue metadata",
      "full data.queues.items[] shape",
      "full queue metadata",
      "deprecated full array compatibility field",
      "full explicit limit remains bounded",
    ],
  };
}

if (import.meta.main) {
  process.stdout.write(`${JSON.stringify(runCodeQueueQueuesShapeContract(), null, 2)}\n`);
}