import { describe, it, beforeEach, expect } from '@jest/globals';
import { UserError, ErrorCode } from '../../src/exceptions';
import { PyScriptApp } from '../../src/main';

describe('Test withUserErrorHandler', () => {
    class MyApp extends PyScriptApp {
        myRealMain: any;

        constructor(myRealMain) {
            super();
            this.myRealMain = myRealMain;
        }

        _realMain() {
            this.myRealMain();
        }
    }

    beforeEach(() => {
        // Ensure we always have a clean body
        document.body.innerHTML = `<div>Hello World</div>`;
    });

    it("userError doesn't stop execution", () => {
        function myRealMain() {
            throw new UserError(ErrorCode.GENERIC, 'Computer says no');
        }

        const app = new MyApp(myRealMain);
        app.main();
        const banners = document.getElementsByClassName('alert-banner');
        expect(banners.length).toBe(1);
        expect(banners[0].innerHTML).toBe('(PY0000): Computer says no');
    });

    it('userError escapes by default', () => {
        function myRealMain() {
            throw new UserError(ErrorCode.GENERIC, 'hello <br>');
        }

        const app = new MyApp(myRealMain);
        app.main();
        const banners = document.getElementsByClassName('alert-banner');
        expect(banners.length).toBe(1);
        expect(banners[0].innerHTML).toBe('(PY0000): hello &lt;br&gt;');
    });

    it("userError messageType=html don't escape", () => {
        function myRealMain() {
            throw new UserError(ErrorCode.GENERIC, 'hello <br>', 'html');
        }

        const app = new MyApp(myRealMain);
        app.main();
        const banners = document.getElementsByClassName('alert-banner');
        expect(banners.length).toBe(1);
        expect(banners[0].innerHTML).toBe('(PY0000): hello <br>');
    });

    it('any other exception should stop execution and raise', () => {
        function myRealMain() {
            throw new Error('Explosions!');
        }

        const app = new MyApp(myRealMain);
        expect(() => app.main()).toThrow(new Error('Explosions!'));
    });
});