// Covers provider-specific failover matcher regressions.
import { describe, expect, it } from "vitest";
import {
  classifyFailoverReason,
  isAuthErrorMessage,
  isBillingErrorMessage,
  isOverloadedErrorMessage,
  isProviderCompletedErrorFinishReasonMessage,
  isRateLimitErrorMessage,
  isServerErrorMessage,
  isTimeoutErrorMessage,
} from "./classify.js";
import { renderRateLimitOrOverloadedCopy } from "./user-copy.js";

describe("Z.ai vendor error codes (#48988)", () => {
  describe("error 1311 — model not included in subscription plan", () => {
    it("classifies Z.ai 1311 JSON body as billing", () => {
      // Z.ai 1311 is a plan entitlement failure, not rate limiting.
      const raw =
        '{"code":1311,"message":"The model you requested is not available in your current plan"}';
      expect(isBillingErrorMessage(raw)).toBe(true);
    });

    it("classifies prose-only subscription plan access denials as billing", () => {
      const raw =
        "FailoverError: Your current subscription plan does not yet include access to GLM-5V-Turbo";
      expect(isBillingErrorMessage(raw)).toBe(true);
    });

    it("classifies Z.ai 1311 with spaces as billing", () => {
      const raw = '{"code": 1311, "message": "model not on plan"}';
      expect(isBillingErrorMessage(raw)).toBe(true);
    });

    it("does not misclassify 1311 as rate_limit", () => {
      const raw =
        '{"code":1311,"message":"The model you requested is not available in your current plan"}';
      expect(isRateLimitErrorMessage(raw)).toBe(false);
    });

    it("does not misclassify 1311 as auth", () => {
      const raw =
        '{"code":1311,"message":"The model you requested is not available in your current plan"}';
      expect(isAuthErrorMessage(raw)).toBe(false);
    });

    it("classifies long Z.ai 1311 payloads as billing", () => {
      const raw = JSON.stringify({
        code: 1311,
        message: "The model you requested is not available in your current plan",
        details: "x".repeat(700),
      });
      expect(raw.length).toBeGreaterThan(512);
      expect(isBillingErrorMessage(raw)).toBe(true);
    });
  });

  describe("error 1113 — wrong endpoint or invalid credentials", () => {
    it("classifies Z.ai 1113 JSON body as auth", () => {
      const raw = '{"code":1113,"message":"invalid api endpoint or credentials"}';
      expect(isAuthErrorMessage(raw)).toBe(true);
    });

    it("classifies Z.ai 1113 with spaces as auth", () => {
      const raw = '{"code": 1113, "message": "invalid api endpoint or credentials"}';
      expect(isAuthErrorMessage(raw)).toBe(true);
    });

    it("does not misclassify 1113 as rate_limit", () => {
      const raw = '{"code":1113,"message":"invalid api endpoint or credentials"}';
      expect(isRateLimitErrorMessage(raw)).toBe(false);
    });

    it("does not misclassify 1113 as billing", () => {
      const raw = '{"code":1113,"message":"invalid api endpoint or credentials"}';
      expect(isBillingErrorMessage(raw)).toBe(false);
    });
  });

  describe("existing patterns are unaffected", () => {
    it("rate limit still classified correctly", () => {
      expect(isRateLimitErrorMessage("rate limit exceeded")).toBe(true);
    });

    it("OpenAI model-capacity text is classified as overloaded", () => {
      expect(
        isOverloadedErrorMessage("Selected model is at capacity. Please try a different model."),
      ).toBe(true);
    });

    it("OpenRouter high-load text is classified as overloaded", () => {
      expect(
        isOverloadedErrorMessage(
          "The service is currently experiencing high load and cannot process your request.",
        ),
      ).toBe(true);
    });

    it("billing still classified correctly", () => {
      expect(isBillingErrorMessage("insufficient credits")).toBe(true);
    });

    it("auth still classified correctly", () => {
      expect(isAuthErrorMessage("invalid api key provided")).toBe(true);
    });
  });
});

describe("Google invalid API key errors (#114784)", () => {
  it("classifies Google Generative AI's invalid-key response as auth", () => {
    const raw =
      "Google Generative AI API error (400): API key not valid. Please pass a valid API key. [code=INVALID_ARGUMENT]";

    expect(isAuthErrorMessage(raw)).toBe(true);
    expect(classifyFailoverReason(raw)).toBe("auth");
  });

  it.each([
    "invalid_api_key_error",
    "API key is invalid",
    '{"code":"API_KEY_INVALID"}',
    '{"code":"API_KEY_INVALID_ERROR"}',
  ])("classifies the %s variant as auth", (raw) => {
    expect(isAuthErrorMessage(raw)).toBe(true);
    expect(classifyFailoverReason(raw)).toBe("auth");
  });

  it("does not treat unrelated Google invalid arguments as auth", () => {
    const raw =
      "Google Generative AI API error (400): Request contains an invalid argument. [code=INVALID_ARGUMENT]";

    expect(isAuthErrorMessage(raw)).toBe(false);
    expect(classifyFailoverReason(raw)).toBeNull();
    expect(isAuthErrorMessage("API key invalidation policy updated")).toBe(false);
    expect(isAuthErrorMessage("INVALID API KEYSTORE configuration")).toBe(false);
  });
});
describe("Chinese provider overload messages", () => {
  const ZHIPU_OVERLOAD = "[1305][该模型当前访问量过大，请您稍后再试]";

  it("classifies the Zhipu GLM overload body as overloaded", () => {
    expect(isOverloadedErrorMessage(ZHIPU_OVERLOAD)).toBe(true);
  });

  it("does not misclassify the GLM overload body as rate limit or auth", () => {
    expect(isRateLimitErrorMessage(ZHIPU_OVERLOAD)).toBe(false);
    expect(isAuthErrorMessage(ZHIPU_OVERLOAD)).toBe(false);
  });
});

describe("Volcengine Coding Plan subscription errors", () => {
  it("classifies InvalidSubscription JSON body as billing", () => {
    const raw =
      '{"error":{"code":"InvalidSubscription","message":"Your account does not have a valid CodingPlan subscription, or your subscription has expired."}}';
    expect(isBillingErrorMessage(raw)).toBe(true);
  });

  it("classifies long InvalidSubscription payloads as billing", () => {
    const raw = JSON.stringify({
      error: {
        code: "InvalidSubscription",
        message:
          "Your account does not have a valid coding plan subscription, or your subscription has expired.",
        details: "x".repeat(700),
      },
    });
    expect(raw.length).toBeGreaterThan(512);
    expect(isBillingErrorMessage(raw)).toBe(true);
  });

  it("classifies InvalidSubscription as billing before auth or rate limit", () => {
    const raw =
      '{"error":{"code":"InvalidSubscription","message":"Your account does not have a valid CodingPlan subscription, or your subscription has expired."}}';
    expect(isRateLimitErrorMessage(raw)).toBe(false);
    expect(classifyFailoverReason(raw)).toBe("billing");
  });
});

describe("agent harness provider mismatch (#91710)", () => {
  it("classifies harness provider rejection as format error", () => {
    expect(
      classifyFailoverReason(
        'Requested agent harness "codex" does not support openai/gpt-5.3-codex (provider is not one of: codex).',
      ),
    ).toBe("format");
  });

  it("classifies harness provider rejection with multiple providers as format error", () => {
    expect(
      classifyFailoverReason(
        'Requested agent harness "codex" does not support openrouter/gpt-5.4 (provider is not one of: codex, openai).',
      ),
    ).toBe("format");
  });
});

describe("server error status classification", () => {
  it("classifies a bare internal server error status as server error", () => {
    // Bare status lines from providers should classify, while prefixed prose is
    // too ambiguous and tested below as a non-match.
    expect(isServerErrorMessage("status: internal server error")).toBe(true);
  });

  it("classifies provider HTTP 5xx wrapper errors as server errors", () => {
    expect(isServerErrorMessage("provider failed (HTTP 500): upstream apiKey is empty")).toBe(true);
  });

  it("does not classify prefixed plain internal server error status prose", () => {
    expect(isServerErrorMessage("Proxy notice: Status: Internal Server Error")).toBe(false);
  });
});

describe("provider-completed finish_reason error (#109218)", () => {
  it("matches bare finish/stop error reasons as provider-completed failures", () => {
    expect(isProviderCompletedErrorFinishReasonMessage("Provider finish_reason: error")).toBe(true);
    expect(isTimeoutErrorMessage("Provider finish_reason: error")).toBe(false);
    expect(classifyFailoverReason("Provider finish_reason: error")).toBe("server_error");
  });

  it("keeps abort/network/malformed finish reasons in the timeout lane", () => {
    for (const sample of [
      "Provider finish_reason: abort",
      "Provider finish_reason: network_error",
      "Provider finish_reason: malformed_response",
    ]) {
      expect(isProviderCompletedErrorFinishReasonMessage(sample)).toBe(false);
      expect(isTimeoutErrorMessage(sample)).toBe(true);
      expect(classifyFailoverReason(sample)).toBe("timeout");
    }
  });
});

describe("generic assistant error text classification (#93931)", () => {
  it("classifies the generic 'LLM request failed.' as a timeout (transient)", () => {
    // The generic error text wraps provider availability failures (model not
    // loaded, endpoint unreachable) that should engage retry/fallback.
    expect(classifyFailoverReason("LLM request failed.")).toBe("timeout");
  });

  it("classifies lowercase 'llm request failed.' as a timeout", () => {
    expect(classifyFailoverReason("llm request failed.")).toBe("timeout");
  });

  it("does NOT match 'LLM request failed:' variants as timeout via this pattern", () => {
    // Variants with specific reasons should be classified by their own patterns,
    // not by the generic LLM request failed match. The schema rejection variant
    // is a format error, not a transient timeout.
    expect(
      isTimeoutErrorMessage(
        "LLM request failed: provider rejected the request schema or tool payload.",
      ),
    ).toBe(false);
  });

  it("does NOT match 'LLM request failed: connection refused' as timeout via this exact-match pattern", () => {
    // The connection-refused variant is a sanitized user-facing string, not
    // the raw error that cron/failover classifiers see. The exact-match regex
    // /^llm request failed\.$/i should NOT match it because of the colon suffix.
    expect(
      isTimeoutErrorMessage("LLM request failed: connection refused by the provider endpoint."),
    ).toBe(false);
  });
});

describe("HTTP 429 overload wording (#98101)", () => {
  it("keeps Z.AI code 1305 in rate-limit backoff while preserving overload copy", () => {
    const message =
      "429 status code (exceeded limit)\n" +
      '{"code":1305,"message":"The service may be temporarily overloaded, please try again later."}';
    expect(classifyFailoverReason(message)).toBe("rate_limit");
    expect(classifyFailoverReason(`HTTP 429: ${message}`)).toBe("rate_limit");
    expect(renderRateLimitOrOverloadedCopy({ reason: "rate_limit", raw: message })).toBe(
      "⚠️ API rate limit reached. Please try again later.",
    );
  });
});