import { setupForgejoToken } from "../src/forgejo/token";
import { describe, it, expect, beforeEach } from "bun:test";

describe("setupForgejoToken", () => {
  beforeEach(() => {
    delete process.env.OVERRIDE_GITHUB_TOKEN;
    delete process.env.DEFAULT_WORKFLOW_TOKEN;
  });

  describe("OVERRIDE_GITHUB_TOKEN (user-provided via github_token input)", () => {
    it("should return OVERRIDE_GITHUB_TOKEN when set", () => {
      process.env.OVERRIDE_GITHUB_TOKEN = "user-provided-token";
      expect(setupForgejoToken()).toBe("user-provided-token");
    });

    it("should take precedence over DEFAULT_WORKFLOW_TOKEN", () => {
      process.env.OVERRIDE_GITHUB_TOKEN = "override-token";
      process.env.DEFAULT_WORKFLOW_TOKEN = "default-token";
      expect(setupForgejoToken()).toBe("override-token");
    });

    it("should not use empty OVERRIDE_GITHUB_TOKEN", () => {
      process.env.OVERRIDE_GITHUB_TOKEN = "";
      process.env.DEFAULT_WORKFLOW_TOKEN = "default-token";
      expect(setupForgejoToken()).toBe("default-token");
    });
  });

  describe("DEFAULT_WORKFLOW_TOKEN (runner's github.token)", () => {
    it("should return DEFAULT_WORKFLOW_TOKEN when no override is set", () => {
      process.env.DEFAULT_WORKFLOW_TOKEN = "workflow-token";
      expect(setupForgejoToken()).toBe("workflow-token");
    });

    it("should not use empty DEFAULT_WORKFLOW_TOKEN", () => {
      process.env.DEFAULT_WORKFLOW_TOKEN = "";
      expect(() => setupForgejoToken()).toThrow(
        "No authentication token available for Forgejo",
      );
    });
  });

  describe("error handling", () => {
    it("should throw when no token is available", () => {
      expect(() => setupForgejoToken()).toThrow(
        "No authentication token available for Forgejo",
      );
    });

    it("should throw when both env vars are empty strings", () => {
      process.env.OVERRIDE_GITHUB_TOKEN = "";
      process.env.DEFAULT_WORKFLOW_TOKEN = "";
      expect(() => setupForgejoToken()).toThrow(
        "No authentication token available for Forgejo",
      );
    });

    it("should include guidance in the error message", () => {
      expect(() => setupForgejoToken()).toThrow("github_token");
    });
  });
});