import { describe, expect, it } from "vitest";
import { downloadPlanFor } from "./download.js";

describe("downloadPlanFor", () => {
  it("plans an npm install for the official TypeScript server", () => {
    const plan = downloadPlanFor({ id: "typescript", download: "npm" });
    expect(plan).toEqual({
      kind: "npm",
      package: "typescript-language-server",
      bin: "typescript-language-server",
    });
  });

  it("plans a GitHub release download for kotlin-lsp", () => {
    const plan = downloadPlanFor({ id: "kotlin", download: "github-release" });
    expect(plan?.kind).toBe("github-release");
    if (plan?.kind === "github-release") {
      expect(plan.owner).toBe("Kotlin");
      expect(plan.repo).toBe("kotlin-lsp");
      expect(plan.bin).toBe("kotlin-lsp");
    }
  });

  it("plans a go install for gopls", () => {
    const plan = downloadPlanFor({ id: "gopls", download: "go-install" });
    expect(plan).toEqual({
      kind: "go-install",
      package: "golang.org/x/tools/gopls@latest",
      bin: "gopls",
    });
  });

  it("returns undefined for servers without auto-download", () => {
    expect(downloadPlanFor({ id: "clangd" })).toBeUndefined();
  });

  it("returns undefined for unknown download kinds", () => {
    expect(downloadPlanFor({ id: "weird", download: "unknown" as never })).toBeUndefined();
  });
});