import { describe, expect, it } from 'vitest';
import { leaderboardReturnHref, playerContextHref, profileViewHref } from '../../src/lib/leaderboard-navigation.js';

describe('leaderboard profile navigation', () => {
    it('preserves leaderboard scope, search and page while starting profile history on its first page', () => {
        const source = '/leaderboard?game=t6&map=t6%3Atown&metric=kills&q=Player+One&offset=50';
        const profile = new URL(playerContextHref('001/2?#', source), 'http://localhost');
        expect(profile.pathname).toBe('/leaderboard/players/001%2F2%3F%23');
        expect(profile.searchParams.get('returnTo')).toBe(source);
        expect(profile.searchParams.get('game')).toBe('t6');
        expect(profile.searchParams.get('map')).toBe('t6:town');
        expect(profile.searchParams.get('metric')).toBe('kills');
        expect(profile.searchParams.has('q')).toBe(false);
        expect(profile.searchParams.has('offset')).toBe(false);
    });

    it('keeps profile filters and return context through pagination and resets history pages on filter changes', () => {
        const current = new URL('http://localhost/leaderboard/players/101?returnTo=%2Fleaderboard%3Fq%3DAce&game=t5&map=t5%3Atheater&metric=highestRound&offset=25');
        const next = new URL(profileViewHref(current, { offset: '50' }), current);
        expect(next.searchParams.get('offset')).toBe('50');
        expect(next.searchParams.get('returnTo')).toBe('/leaderboard?q=Ace');
        expect(next.searchParams.get('map')).toBe('t5:theater');
        const filtered = new URL(profileViewHref(current, { game: 't6', map: '' }), current);
        expect(filtered.searchParams.has('offset')).toBe(false);
        expect(filtered.searchParams.get('map')).toBe('');
        expect(filtered.searchParams.get('game')).toBe('t6');
        expect(filtered.searchParams.get('returnTo')).toBe('/leaderboard?q=Ace');
    });

    it('preserves explicit all maps and squad scope through profile links and paging', () => {
        const source = '/leaderboard?map=&players=2&metric=highestRound';
        expect(leaderboardReturnHref(source)).toBe(source);
        const profile = new URL(playerContextHref('101', source), 'http://localhost');
        expect(profile.searchParams.get('map')).toBe('');
        expect(profile.searchParams.get('players')).toBe('2');
        const next = new URL(profileViewHref(profile, { offset: '25' }), profile);
        expect(next.searchParams.get('map')).toBe('');
        expect(next.searchParams.get('players')).toBe('2');
    });

    it('restricts supplied return destinations to the local leaderboard', () => {
        for (const value of [null, '', 'https://example.com/leaderboard', '//example.com/leaderboard', '/leaderboard/players/101', '/leaderboard/../settings', '/leaderboard\\@example.com']) {
            expect(leaderboardReturnHref(value)).toBe('/leaderboard');
        }
        expect(leaderboardReturnHref('/leaderboard?q=A%26B&unrelated=drop#fragment')).toBe('/leaderboard?q=A%26B');
    });

    it('uses the displayed fallback scope when a shared leaderboard URL contains unknown filters', () => {
        const source = '/leaderboard?game=t7&metric=unknown&q=101';
        const profile = new URL(playerContextHref('101', source), 'http://localhost');
        expect(profile.searchParams.get('returnTo')).toBe(source);
        expect(profile.searchParams.has('game')).toBe(false);
        expect(profile.searchParams.has('metric')).toBe(false);
    });
});