import type { ProviderContract } from "@dispatch/kernel";
import { describe, expect, it } from "vitest";
import { createCredentialStore } from "./registry.js";

function fakeProvider(
  id: string,
  listModels?: () => Promise<readonly { id: string }[]>,
): ProviderContract {
  return {
    id,
    stream: async function* () {},
    ...(listModels ? { listModels } : {}),
  };
}

describe("createCredentialStore", () => {
  const credentials = [{ name: "opencode", providerId: "openai-compat" }];
  const providers = new Map<string, ProviderContract>();

  const store = createCredentialStore({
    credentials,
    getProvider: (id) => providers.get(id),
  });

  describe("resolve", () => {
    it("resolves a simple model name", () => {
      providers.set("openai-compat", fakeProvider("openai-compat"));
      const result = store.resolve("opencode/deepseek-v4-flash");
      expect(result).toEqual({ providerId: "openai-compat", model: "deepseek-v4-flash" });
    });

    it("resolves a model name with slashes", () => {
      const result = store.resolve("opencode/a/b");
      expect(result).toEqual({ providerId: "openai-compat", model: "a/b" });
    });

    it("returns undefined for unknown credential name", () => {
      const result = store.resolve("unknown/x");
      expect(result).toBeUndefined();
    });

    it("returns undefined for no slash", () => {
      const result = store.resolve("noslash");
      expect(result).toBeUndefined();
    });

    it("returns undefined for empty model segment", () => {
      const result = store.resolve("opencode/");
      expect(result).toBeUndefined();
    });
  });

  describe("listCatalog", () => {
    it("lists models from providers with listModels", async () => {
      providers.set(
        "openai-compat",
        fakeProvider("openai-compat", async () => [{ id: "m1" }, { id: "m2" }]),
      );

      const catalog = await store.listCatalog();
      expect(catalog).toEqual(["opencode/m1", "opencode/m2"]);
    });

    it("skips credentials whose provider has no listModels", async () => {
      providers.set("openai-compat", fakeProvider("openai-compat"));

      const catalog = await store.listCatalog();
      expect(catalog).toEqual([]);
    });

    it("skips credentials whose provider is missing", async () => {
      const emptyStore = createCredentialStore({
        credentials: [{ name: "missing", providerId: "nonexistent" }],
        getProvider: () => undefined,
      });

      const catalog = await emptyStore.listCatalog();
      expect(catalog).toEqual([]);
    });
  });
});
