import { describe, it, expect, beforeEach } from "vitest";
import {
  setRunningState,
  getErrorMessage,
  isRunning,
  currentAbortController,
} from "@/routes/app-spec/common.js";

describe("app-spec/common.ts", () => {
  beforeEach(() => {
    // Reset state before each test
    setRunningState(false, null);
  });

  describe("setRunningState", () => {
    it("should set isRunning to true when running is true", () => {
      setRunningState(true);
      expect(isRunning).toBe(true);
    });

    it("should set isRunning to false when running is false", () => {
      setRunningState(true);
      setRunningState(false);
      expect(isRunning).toBe(false);
    });

    it("should set currentAbortController when provided", () => {
      const controller = new AbortController();
      setRunningState(true, controller);
      expect(currentAbortController).toBe(controller);
    });

    it("should set currentAbortController to null when not provided", () => {
      const controller = new AbortController();
      setRunningState(true, controller);
      setRunningState(false);
      expect(currentAbortController).toBe(null);
    });

    it("should set currentAbortController to null when explicitly passed null", () => {
      const controller = new AbortController();
      setRunningState(true, controller);
      setRunningState(true, null);
      expect(currentAbortController).toBe(null);
    });

    it("should update state multiple times correctly", () => {
      const controller1 = new AbortController();
      const controller2 = new AbortController();

      setRunningState(true, controller1);
      expect(isRunning).toBe(true);
      expect(currentAbortController).toBe(controller1);

      setRunningState(true, controller2);
      expect(isRunning).toBe(true);
      expect(currentAbortController).toBe(controller2);

      setRunningState(false, null);
      expect(isRunning).toBe(false);
      expect(currentAbortController).toBe(null);
    });
  });

  describe("getErrorMessage", () => {
    it("should return message from Error instance", () => {
      const error = new Error("Test error message");
      expect(getErrorMessage(error)).toBe("Test error message");
    });

    it("should return 'Unknown error' for non-Error objects", () => {
      expect(getErrorMessage("string error")).toBe("Unknown error");
      expect(getErrorMessage(123)).toBe("Unknown error");
      expect(getErrorMessage(null)).toBe("Unknown error");
      expect(getErrorMessage(undefined)).toBe("Unknown error");
      expect(getErrorMessage({})).toBe("Unknown error");
      expect(getErrorMessage([])).toBe("Unknown error");
    });

    it("should return message from Error with empty message", () => {
      const error = new Error("");
      expect(getErrorMessage(error)).toBe("");
    });

    it("should handle Error objects with custom properties", () => {
      const error = new Error("Base message");
      (error as any).customProp = "custom value";
      expect(getErrorMessage(error)).toBe("Base message");
    });

    it("should handle Error objects created with different constructors", () => {
      class CustomError extends Error {
        constructor(message: string) {
          super(message);
          this.name = "CustomError";
        }
      }

      const customError = new CustomError("Custom error message");
      expect(getErrorMessage(customError)).toBe("Custom error message");
    });
  });
});