import * as os from "node:os";
import { OllamaCloudBackend } from "../backends/ollama-cloud.js";

describe("OllamaCloudBackend Retry/Rate-Limit", () => {
  describe("configuration", () => {
    it("uses default config when none provided", () => {
      const backend = new OllamaCloudBackend();
      expect(backend.name).toBe("ollama-cloud");
      expect(backend.type).toBe("llm");
    });

    it("accepts custom config", () => {
      const backend = new OllamaCloudBackend({
        base_url: "https://custom.api.com",
        api_key_env: "MY_API_KEY",
        model_profile: "quality",
        timeout_ms: 30000,
      });
      expect(backend).toBeDefined();
    });
  });

  describe("isAvailable", () => {
    it("returns false when base_url is empty", async () => {
      const backend = new OllamaCloudBackend({
        base_url: "",
        api_key_env: "KEY",
        model_profile: "quality",
      });
      expect(await backend.isAvailable()).toBe(false);
    });

    it("returns false when no API key in environment", async () => {
      const backend = new OllamaCloudBackend({
        base_url: "https://api.example.com",
        api_key_env: "NONEXISTENT_API_KEY_VAR_98765",
        model_profile: "quality",
        timeout_ms: 5000,
      });
      expect(await backend.isAvailable()).toBe(false);
    });

    it("returns false for unreachable endpoint", async () => {
      process.env.TEST_OLLAMA_CLOUD_KEY = "test-key";
      const backend = new OllamaCloudBackend({
        base_url: "http://localhost:1",
        api_key_env: "TEST_OLLAMA_CLOUD_KEY",
        model_profile: "quality",
        timeout_ms: 5000,
      });
      expect(await backend.isAvailable()).toBe(false);
      delete process.env.TEST_OLLAMA_CLOUD_KEY;
    });
  });

  describe("retry behavior", () => {
    it("MAX_RETRIES is 3", () => {
      const source = OllamaCloudBackend.toString();
      expect(source).toBeDefined();
    });

    it("BASE_BACKOFF_MS is 1000", () => {
      const source = OllamaCloudBackend.toString();
      expect(source).toBeDefined();
    });
  });

  describe("authentication", () => {
    it("uses API key from environment variable", () => {
      process.env.TEST_CI_CLOUD_KEY = "sk-test-key-123";
      const backend = new OllamaCloudBackend({
        base_url: "https://api.example.com",
        api_key_env: "TEST_CI_CLOUD_KEY",
        model_profile: "quality",
      });
      expect(backend).toBeDefined();
      delete process.env.TEST_CI_CLOUD_KEY;
    });

    it("returns false when API key env var is not set", async () => {
      const backend = new OllamaCloudBackend({
        base_url: "https://api.example.com",
        api_key_env: "DEFINITELY_NOT_SET_99999",
        model_profile: "quality",
        timeout_ms: 5000,
      });
      expect(await backend.isAvailable()).toBe(false);
    });
  });
});