/**
 * Unit tests for AniWorld.ContextMenu
 *
 * Covers the right-click → "Anime Settings" navigation flow including
 * the regression where `hide()` was called BEFORE the navigation
 * `window.location.href` was built, which caused the key to be reset
 * to null and the URL to become `/anime/settings?key=null`.
 */

import { readFileSync } from 'node:fs';
import { resolve } from 'node:path';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';

const SRC_PATH = resolve(
    __dirname,
    '../../../src/server/web/static/js/index/context-menu.js',
);

function loadContextMenu() {
    // Reset module state so each test gets a fresh closure.
    delete global.AniWorld;
    const src = readFileSync(SRC_PATH, 'utf8');
    // Indirect eval → runs in global scope so `var AniWorld = window.AniWorld
    // || {}` mutates the real `global.AniWorld` (and through it,
    // `window.AniWorld` since happy-dom exposes global on window).
    // eslint-disable-next-line no-eval
    (0, eval)(src);
    return global.AniWorld.ContextMenu;
}

describe('ContextMenu — right-click → Anime Settings flow', () => {
    beforeEach(() => {
        document.body.innerHTML = '';
        delete window.AniWorld;
        delete global.AniWorld;
        delete window.location;
        window.location = { href: '' };
    });

    afterEach(() => {
        vi.restoreAllMocks();
    });

    it('navigates to /anime/settings?key=<series-key> after menu click', () => {
        const ctx = loadContextMenu();
        expect(ctx).toBeTruthy();
        expect(typeof ctx.show).toBe('function');

        const grid = document.createElement('div');
        grid.id = 'series-grid';
        const card = document.createElement('div');
        card.className = 'series-card';
        card.setAttribute('data-key', 'attack-on-titan');
        grid.appendChild(card);
        document.body.appendChild(grid);

        ctx.init();

        card.dispatchEvent(
            new MouseEvent('contextmenu', {
                bubbles: true,
                clientX: 10,
                clientY: 10,
            }),
        );

        const menuItem = document.querySelector(
            '[data-action="anime-settings"]',
        );
        expect(menuItem).toBeTruthy();

        menuItem.click();

        expect(window.location.href).toBe(
            '/anime/settings?key=attack-on-titan',
        );
    });

    it('encodes special characters in the key (URL-unsafe slugs)', () => {
        const ctx = loadContextMenu();

        const grid = document.createElement('div');
        grid.id = 'series-grid';
        const card = document.createElement('div');
        card.className = 'series-card';
        card.setAttribute('data-key', 'a/b c');
        grid.appendChild(card);
        document.body.appendChild(grid);

        ctx.init();
        card.dispatchEvent(
            new MouseEvent('contextmenu', {
                bubbles: true,
                clientX: 5,
                clientY: 5,
            }),
        );
        document.querySelector('[data-action="anime-settings"]').click();

        expect(window.location.href).toBe('/anime/settings?key=a%2Fb%20c');
    });

    it('source captures the key before calling hide() — regression guard', () => {
        // Static invariant: the click handler must read currentSeriesKey
        // BEFORE calling hide(). This guards against regressions of the
        // bug where hide() cleared currentSeriesKey before the URL was
        // built, resulting in /anime/settings?key=null.
        const src = readFileSync(SRC_PATH, 'utf8');
        const clickHandlerMatch = src.match(
            /querySelector\('\[data-action="anime-settings"\]'\)\.addEventListener\('click',\s*function\s*\(\)\s*{([\s\S]*?)\}\);/,
        );
        expect(clickHandlerMatch, 'click handler should exist').toBeTruthy();
        const body = clickHandlerMatch[1];

        expect(body).toMatch(/currentSeriesKey/);
        expect(body).toMatch(/\bhide\s*\(\s*\)/);
        expect(body).toMatch(/const\s+key\s*=\s*currentSeriesKey/);
    });

    it('does not expose legacy nfo-diagnostics action', () => {
        const ctx = loadContextMenu();

        const grid = document.createElement('div');
        grid.id = 'series-grid';
        const card = document.createElement('div');
        card.className = 'series-card';
        card.setAttribute('data-key', 'k');
        grid.appendChild(card);
        document.body.appendChild(grid);

        ctx.init();
        card.dispatchEvent(
            new MouseEvent('contextmenu', {
                bubbles: true,
                clientX: 5,
                clientY: 5,
            }),
        );

        expect(
            document.querySelector('[data-action="nfo-diagnostics"]'),
        ).toBeNull();
        expect(
            document.querySelector('[data-action="anime-settings"]'),
        ).toBeTruthy();
    });

    it('right-click outside a series card does not show the menu', () => {
        const ctx = loadContextMenu();

        const grid = document.createElement('div');
        grid.id = 'series-grid';
        document.body.appendChild(grid);

        ctx.init();
        // Click on empty grid area — should NOT show menu (no .series-card ancestor).
        grid.dispatchEvent(
            new MouseEvent('contextmenu', {
                bubbles: true,
                clientX: 5,
                clientY: 5,
            }),
        );

        expect(document.querySelector('.context-menu')).toBeNull();
    });
});