import { redisTest } from "@internal/testcontainers";
import { trace } from "@internal/tracing";
import { Logger } from "@trigger.dev/core/logger";
import { describe } from "vitest";
import { FairQueueSelectionStrategy } from "../fairQueueSelectionStrategy.js";
import { RunQueue } from "../index.js";
import { RunQueueFullKeyProducer } from "../keyProducer.js";
import type { InputPayload } from "../types.js";
import { Decimal } from "@trigger.dev/database";

// String form of the default counterTtlSeconds (86400). Tracked Lua scripts
// take TTL as an ARG; tests that invoke the scripts directly pass this.
const DEFAULT_COUNTER_TTL = "86400";

const testOptions = {
  name: "rq",
  tracer: trace.getTracer("rq"),
  workers: 1,
  defaultEnvConcurrency: 25,
  logger: new Logger("RunQueue", "warn"),
  retryOptions: {
    maxAttempts: 5,
    factor: 1.1,
    minTimeoutInMs: 100,
    maxTimeoutInMs: 1_000,
    randomize: true,
  },
  keys: new RunQueueFullKeyProducer(),
};

const authenticatedEnvDev = {
  id: "e1234",
  type: "DEVELOPMENT" as const,
  maximumConcurrencyLimit: 10,
  concurrencyLimitBurstFactor: new Decimal(2.0),
  project: { id: "p1234" },
  organization: { id: "o1234" },
};

function createQueue(redisContainer: any) {
  return new RunQueue({
    ...testOptions,
    queueSelectionStrategy: new FairQueueSelectionStrategy({
      redis: {
        keyPrefix: "runqueue:test:",
        host: redisContainer.getHost(),
        port: redisContainer.getPort(),
      },
      keys: testOptions.keys,
    }),
    redis: {
      keyPrefix: "runqueue:test:",
      host: redisContainer.getHost(),
      port: redisContainer.getPort(),
    },
  });
}

function makeMessage(overrides: Partial<InputPayload> = {}): InputPayload {
  return {
    runId: "r1",
    taskIdentifier: "task/my-task",
    orgId: "o1234",
    projectId: "p1234",
    environmentId: "e1234",
    environmentType: "DEVELOPMENT",
    queue: "task/my-task",
    timestamp: Date.now(),
    attempt: 0,
    ...overrides,
  };
}

vi.setConfig({ testTimeout: 60_000 });

describe("CK base-queue counters", () => {
  redisTest("lengthOfQueue returns aggregate across CK variants", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const now = Date.now();
      const messages = [
        makeMessage({ runId: "r1", concurrencyKey: "ck-a", timestamp: now }),
        makeMessage({ runId: "r2", concurrencyKey: "ck-a", timestamp: now + 1 }),
        makeMessage({ runId: "r3", concurrencyKey: "ck-b", timestamp: now + 2 }),
        makeMessage({ runId: "r4", concurrencyKey: "ck-c", timestamp: now + 3 }),
      ];

      for (const msg of messages) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: msg,
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }

      // Aggregate (no CK arg) should sum all variants
      expect(await queue.lengthOfQueue(authenticatedEnvDev, messages[0].queue)).toBe(4);

      // Per-variant still works
      expect(await queue.lengthOfQueue(authenticatedEnvDev, messages[0].queue, "ck-a")).toBe(2);
      expect(await queue.lengthOfQueue(authenticatedEnvDev, messages[0].queue, "ck-b")).toBe(1);

      // Plural lengthOfQueues should also see the aggregate
      const lengths = await queue.lengthOfQueues(authenticatedEnvDev, [messages[0].queue]);
      expect(lengths[messages[0].queue]).toBe(4);
    } finally {
      await queue.quit();
    }
  });

  redisTest("lazy init from pre-existing CK backlog", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const now = Date.now();
      const baseMsg = makeMessage({ runId: "seed", concurrencyKey: "ck-a", timestamp: now });

      // Pre-populate two variants via direct ZADD to simulate pre-deploy backlog
      // (no counter touched). ioredis auto-prefixes keys with `runqueue:test:`,
      // so we pass un-prefixed keys.
      const variantA = testOptions.keys.queueKey(authenticatedEnvDev, baseMsg.queue, "ck-a");
      const variantB = testOptions.keys.queueKey(authenticatedEnvDev, baseMsg.queue, "ck-b");
      const ckIndexKey = testOptions.keys.ckIndexKeyFromQueue(variantA);
      for (let i = 0; i < 10; i++) {
        await queue.redis.zadd(variantA, now + i, `old-a-${i}`);
      }
      for (let i = 0; i < 5; i++) {
        await queue.redis.zadd(variantB, now + i, `old-b-${i}`);
      }
      await queue.redis.zadd(ckIndexKey, now, variantA);
      await queue.redis.zadd(ckIndexKey, now, variantB);

      // Counter should not yet exist
      const counterKey = testOptions.keys.queueLengthCounterKeyFromQueue(variantA);
      expect(await queue.redis.exists(counterKey)).toBe(0);

      // First CK enqueue: lazy init should compute 15 (pre-state), then INCR to 16
      await queue.enqueueMessage({
        env: authenticatedEnvDev,
        message: makeMessage({ runId: "new-a", concurrencyKey: "ck-a", timestamp: now + 100 }),
        workerQueue: authenticatedEnvDev.id,
        skipDequeueProcessing: true,
      });

      const counterVal = await queue.redis.get(counterKey);
      expect(Number(counterVal)).toBe(16);

      // lengthOfQueue should also reflect 16
      expect(await queue.lengthOfQueue(authenticatedEnvDev, baseMsg.queue)).toBe(16);
    } finally {
      await queue.quit();
    }
  });

  redisTest("non-CK queue regression: counter never created", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      for (let i = 0; i < 5; i++) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: makeMessage({ runId: `r${i}`, timestamp: Date.now() + i }),
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }

      // Counter key should not exist for a pure non-CK queue
      const counterKey = testOptions.keys.queueLengthCounterKey(
        authenticatedEnvDev,
        "task/my-task"
      );
      expect(await queue.redis.exists(counterKey)).toBe(0);

      // But lengthOfQueue still returns 5 via base ZCARD
      expect(await queue.lengthOfQueue(authenticatedEnvDev, "task/my-task")).toBe(5);
    } finally {
      await queue.quit();
    }
  });

  redisTest("mixed CK + non-CK on same base queue", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      // 3 non-CK + 2 CK on same base queue name
      for (let i = 0; i < 3; i++) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: makeMessage({ runId: `nonck-${i}`, timestamp: Date.now() + i }),
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }
      for (let i = 0; i < 2; i++) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: makeMessage({
            runId: `ck-${i}`,
            concurrencyKey: "ck-a",
            timestamp: Date.now() + 100 + i,
          }),
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }

      expect(await queue.lengthOfQueue(authenticatedEnvDev, "task/my-task")).toBe(5);
    } finally {
      await queue.quit();
    }
  });

  redisTest("length counter decrements on dequeue", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const now = Date.now() - 1000;
      const msgs = [
        makeMessage({ runId: "r1", concurrencyKey: "ck-a", timestamp: now }),
        makeMessage({ runId: "r2", concurrencyKey: "ck-b", timestamp: now + 1 }),
      ];
      for (const msg of msgs) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: msg,
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }
      expect(await queue.lengthOfQueue(authenticatedEnvDev, msgs[0].queue)).toBe(2);

      const shard = testOptions.keys.masterQueueShardForEnvironment(msgs[0].environmentId, 2);
      await queue.testDequeueFromMasterQueue(shard, msgs[0].environmentId, 10);

      // Both dequeued → counter should be 0
      expect(await queue.lengthOfQueue(authenticatedEnvDev, msgs[0].queue)).toBe(0);
    } finally {
      await queue.quit();
    }
  });

  redisTest(
    "running counter bumps when dequeueMessageFromKey is called for a CK message",
    async ({ redisContainer }) => {
      const queue = createQueue(redisContainer);
      try {
        // Seed a message at its expected key and invoke the Tracked variant directly.
        // This mirrors what dequeueMessageFromWorkerQueue would do once a worker
        // pulls a message off the worker queue.
        const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });
        const queueKey = testOptions.keys.queueKey(authenticatedEnvDev, msg.queue, "ck-a");
        const messageKey = testOptions.keys.messageKey(msg.orgId, msg.runId);
        const runningCounterKey = testOptions.keys.queueRunningCounterKeyFromQueue(queueKey);

        await queue.redis.set(
          messageKey,
          JSON.stringify({ ...msg, queue: queueKey, version: "2", workerQueue: "wq" })
        );

        for (let i = 0; i < 3; i++) {
          await queue.redis.set(
            testOptions.keys.messageKey(msg.orgId, `r${i}`),
            JSON.stringify({
              ...msg,
              runId: `r${i}`,
              queue: queueKey,
              version: "2",
              workerQueue: "wq",
            })
          );
          await queue.redis.dequeueMessageFromKeyTracked(
            testOptions.keys.messageKey(msg.orgId, `r${i}`),
            "runqueue:test:",
            DEFAULT_COUNTER_TTL
          );
        }

        expect(Number(await queue.redis.get(runningCounterKey))).toBe(3);

        const running = await queue.currentConcurrencyOfQueues(authenticatedEnvDev, [msg.queue]);
        expect(running[msg.queue]).toBe(3);
      } finally {
        await queue.quit();
      }
    }
  );

  redisTest("floor-at-zero protects against spurious decrements", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const variantA = testOptions.keys.queueKey(authenticatedEnvDev, "task/my-task", "ck-a");
      const runningCounterKey = testOptions.keys.queueRunningCounterKeyFromQueue(variantA);
      await queue.redis.set(runningCounterKey, "0");

      // Call the Tracked release directly with un-prefixed keys (ioredis prepends the prefix)
      await queue.redis.releaseConcurrencyTracked(
        testOptions.keys.queueCurrentConcurrencyKeyFromQueue(variantA),
        testOptions.keys.envCurrentConcurrencyKey(authenticatedEnvDev),
        testOptions.keys.queueCurrentDequeuedKeyFromQueue(variantA),
        testOptions.keys.envCurrentDequeuedKey(authenticatedEnvDev),
        runningCounterKey,
        testOptions.keys.ckIndexKeyFromQueue(variantA),
        "phantom-message",
        "runqueue:test:",
        DEFAULT_COUNTER_TTL
      );

      expect(Number(await queue.redis.get(runningCounterKey))).toBe(0);
    } finally {
      await queue.quit();
    }
  });

  redisTest("lengthCounter has 24h TTL after lazy-init", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      await queue.enqueueMessage({
        env: authenticatedEnvDev,
        message: makeMessage({ runId: "r1", concurrencyKey: "ck-a" }),
        workerQueue: authenticatedEnvDev.id,
        skipDequeueProcessing: true,
      });

      const counterKey = testOptions.keys.queueLengthCounterKey(
        authenticatedEnvDev,
        "task/my-task"
      );
      const ttl = await queue.redis.ttl(counterKey);
      // Expect roughly 86400; allow only a few seconds of slack for test scheduling.
      expect(ttl).toBeGreaterThanOrEqual(86390);
      expect(ttl).toBeLessThanOrEqual(86400);
    } finally {
      await queue.quit();
    }
  });

  redisTest(
    "duplicate CK enqueue (same runId) does not inflate lengthCounter",
    async ({ redisContainer }) => {
      const queue = createQueue(redisContainer);
      try {
        const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });

        // First enqueue: counter goes 0 -> 1
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: msg,
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });

        // Same runId again: ZADD returns 0 (already in zset), counter must stay at 1
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: msg,
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });

        expect(await queue.lengthOfQueue(authenticatedEnvDev, msg.queue)).toBe(1);
      } finally {
        await queue.quit();
      }
    }
  );

  redisTest(
    "duplicate nack (runId already in variant zset) does not inflate lengthCounter",
    async ({ redisContainer }) => {
      const queue = createQueue(redisContainer);
      try {
        const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });

        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: msg,
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
        expect(await queue.lengthOfQueue(authenticatedEnvDev, msg.queue)).toBe(1);

        // Nack without dequeuing first — the message is still in the variant zset.
        // ZADD returns 0 (already present), so lengthCounter must not bump.
        await queue.nackMessage({
          orgId: msg.orgId,
          messageId: msg.runId,
          skipDequeueProcessing: true,
          incrementAttemptCount: false,
        });
        expect(await queue.lengthOfQueue(authenticatedEnvDev, msg.queue)).toBe(1);

        // A second nack on the same runId must still be a no-op for the counter.
        await queue.nackMessage({
          orgId: msg.orgId,
          messageId: msg.runId,
          skipDequeueProcessing: true,
          incrementAttemptCount: false,
        });
        expect(await queue.lengthOfQueue(authenticatedEnvDev, msg.queue)).toBe(1);
      } finally {
        await queue.quit();
      }
    }
  );

  redisTest(
    "duplicate dequeueMessageFromKey (same runId) does not inflate runningCounter",
    async ({ redisContainer }) => {
      const queue = createQueue(redisContainer);
      try {
        const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });
        const queueKey = testOptions.keys.queueKey(authenticatedEnvDev, msg.queue, "ck-a");
        const messageKey = testOptions.keys.messageKey(msg.orgId, msg.runId);
        const runningCounterKey = testOptions.keys.queueRunningCounterKeyFromQueue(queueKey);

        await queue.redis.set(
          messageKey,
          JSON.stringify({ ...msg, queue: queueKey, version: "2", workerQueue: "wq" })
        );

        // First call: SADD returns 1, runningCounter goes 0 -> 1.
        await queue.redis.dequeueMessageFromKeyTracked(
          messageKey,
          "runqueue:test:",
          DEFAULT_COUNTER_TTL
        );
        expect(Number(await queue.redis.get(runningCounterKey))).toBe(1);

        // Second call on the same messageKey: SADD returns 0, runningCounter must stay at 1.
        await queue.redis.dequeueMessageFromKeyTracked(
          messageKey,
          "runqueue:test:",
          DEFAULT_COUNTER_TTL
        );
        expect(Number(await queue.redis.get(runningCounterKey))).toBe(1);
      } finally {
        await queue.quit();
      }
    }
  );

  redisTest("nack lazy-inits lengthCounter when it expired", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });
      // Seed three messages on the CK variant so the lazy-init has a non-trivial floor.
      for (let i = 0; i < 3; i++) {
        await queue.enqueueMessage({
          env: authenticatedEnvDev,
          message: makeMessage({ runId: `seed-${i}`, concurrencyKey: "ck-a" }),
          workerQueue: authenticatedEnvDev.id,
          skipDequeueProcessing: true,
        });
      }

      // Simulate counter expiry (the 24h TTL kicked in).
      const counterKey = testOptions.keys.queueLengthCounterKey(
        authenticatedEnvDev,
        "task/my-task"
      );
      await queue.redis.del(counterKey);
      expect(await queue.redis.exists(counterKey)).toBe(0);

      // Dequeue one to currentConcurrency so we have something to nack back.
      const shard = testOptions.keys.masterQueueShardForEnvironment(msg.environmentId, 2);
      await queue.testDequeueFromMasterQueue(shard, msg.environmentId, 1);

      // Nack a CK message. nackMessageCkTracked should lazy-init the counter
      // (find 2 already in zset + 1 we're re-queuing) rather than starting from 1.
      await queue.nackMessage({
        orgId: msg.orgId,
        messageId: "seed-0",
        skipDequeueProcessing: true,
      });

      // 3 originals, 1 was dequeued (still re-queued by nack), counter should now reflect all 3.
      const observed = await queue.lengthOfQueue(authenticatedEnvDev, msg.queue);
      expect(observed).toBe(3);
    } finally {
      await queue.quit();
    }
  });

  redisTest(
    "fast-path-variant dequeue seeds runningCounter without missing its own SCARD",
    async ({ redisContainer }) => {
      const queue = createQueue(redisContainer);
      try {
        // Simulate: a CK variant has 3 running messages from prior fast-path enqueues
        // (so the variant zset is empty and ckIndex does NOT include this variant).
        // Another variant of the same base queue IS in ckIndex with 1 running message.
        // Counter is missing (post-TTL-expiry). A new dequeue lands on the fast-path
        // variant. The lazy-init must add the fast-path variant's SCARD even though
        // it's not in ckIndex.
        const msg = makeMessage({ runId: "fp-new", concurrencyKey: "ck-fastpath" });
        const fastVariant = testOptions.keys.queueKey(
          authenticatedEnvDev,
          msg.queue,
          "ck-fastpath"
        );
        const otherVariant = testOptions.keys.queueKey(authenticatedEnvDev, msg.queue, "ck-other");
        const ckIndexKey = testOptions.keys.ckIndexKeyFromQueue(fastVariant);
        const runningCounterKey = testOptions.keys.queueRunningCounterKeyFromQueue(fastVariant);

        // Seed 3 prior fast-path runs into the fast variant's currentDequeued (no zset, no ckIndex).
        for (let i = 0; i < 3; i++) {
          await queue.redis.sadd(`${fastVariant}:currentDequeued`, `prior-${i}`);
        }

        // Seed the other variant: 1 zset entry (so it's in ckIndex) + 1 currentDequeued.
        await queue.redis.zadd(otherVariant, Date.now(), "other-q-1");
        await queue.redis.zadd(ckIndexKey, Date.now(), otherVariant);
        await queue.redis.sadd(`${otherVariant}:currentDequeued`, "other-r-1");

        // Counter is intentionally missing — simulates post-TTL state.
        expect(await queue.redis.exists(runningCounterKey)).toBe(0);

        // New fast-path dequeue lands on the fast variant.
        const messageKey = testOptions.keys.messageKey(msg.orgId, msg.runId);
        await queue.redis.set(
          messageKey,
          JSON.stringify({ ...msg, queue: fastVariant, version: "2", workerQueue: "wq" })
        );
        await queue.redis.dequeueMessageFromKeyTracked(
          messageKey,
          "runqueue:test:",
          DEFAULT_COUNTER_TTL
        );

        // True running across all variants: 3 (fast prior) + 1 (fast new) + 1 (other) = 5.
        // Without the ownVariantSeen fix, the seed would miss the fast variant entirely
        // and counter would end at 1 (other variant SCARD = 1, INCR for new dequeue) — off by 4.
        const counterVal = Number(await queue.redis.get(runningCounterKey));
        expect(counterVal).toBe(5);
      } finally {
        await queue.quit();
      }
    }
  );

  redisTest("release lazy-inits runningCounter when missing", async ({ redisContainer }) => {
    const queue = createQueue(redisContainer);
    try {
      const msg = makeMessage({ runId: "r1", concurrencyKey: "ck-a" });
      const variant = testOptions.keys.queueKey(authenticatedEnvDev, msg.queue, "ck-a");
      const runningCounterKey = testOptions.keys.queueRunningCounterKeyFromQueue(variant);

      // Enqueue so ckIndex picks up the variant.
      await queue.enqueueMessage({
        env: authenticatedEnvDev,
        message: msg,
        workerQueue: authenticatedEnvDev.id,
        skipDequeueProcessing: true,
      });
      // Seed two running messages directly into currentDequeued so release has something to remove.
      await queue.redis.sadd(`${variant}:currentDequeued`, msg.runId);
      await queue.redis.sadd(`${variant}:currentDequeued`, "r2");

      // Counter is missing — simulates post-TTL state without waiting.
      expect(await queue.redis.exists(runningCounterKey)).toBe(0);

      // releaseAllConcurrency calls releaseConcurrencyTracked under the hood for CK queues.
      await queue.releaseAllConcurrency(msg.orgId, msg.runId);

      // Pre-release truth was 2 in flight; after release one remains. Counter should be 1.
      const counterVal = Number(await queue.redis.get(runningCounterKey));
      expect(counterVal).toBe(1);
    } finally {
      await queue.quit();
    }
  });

  redisTest("counterTtlSeconds option is honored on lazy-init", async ({ redisContainer }) => {
    // Build a queue with a short TTL and verify the counter is SET with it.
    const queue = new RunQueue({
      ...testOptions,
      counterTtlSeconds: 60,
      queueSelectionStrategy: new FairQueueSelectionStrategy({
        redis: {
          keyPrefix: "runqueue:test:",
          host: redisContainer.getHost(),
          port: redisContainer.getPort(),
        },
        keys: testOptions.keys,
      }),
      redis: {
        keyPrefix: "runqueue:test:",
        host: redisContainer.getHost(),
        port: redisContainer.getPort(),
      },
    });
    try {
      await queue.enqueueMessage({
        env: authenticatedEnvDev,
        message: makeMessage({ runId: "r1", concurrencyKey: "ck-a" }),
        workerQueue: authenticatedEnvDev.id,
        skipDequeueProcessing: true,
      });

      const counterKey = testOptions.keys.queueLengthCounterKey(
        authenticatedEnvDev,
        "task/my-task"
      );
      const ttl = await queue.redis.ttl(counterKey);
      // Generous lower bound — CI workers can occasionally stall multiple
      // seconds between the lazy-init SET and the TTL read.
      expect(ttl).toBeGreaterThanOrEqual(50);
      expect(ttl).toBeLessThanOrEqual(60);
    } finally {
      await queue.quit();
    }
  });
});
