import { describe, expect, it } from 'vitest';
import { contextHref, returnLabel, safeReturnHref } from '../../src/lib/navigation-context.js';

describe('navigation context', () => {
    it('restores Bank filters, pagination and the selected player from detail pages', () => {
        const source = '/bank?view=transactions&game=t5&offset=25&player=00042&historyOffset=25';
        const target = new URL(contextHref('/matches/17', source), 'http://localhost');
        expect(safeReturnHref(target.searchParams.get('returnTo'), '/')).toBe(source);
        expect(returnLabel(source)).toBe('Back to Bank');
    });
    it('retains nested origins, list scope, loaded results and anchors', () => {
        const source = new URL(
            'http://localhost/leaderboard/players/42?game=t5&offset=25&returnTo=%2Fleaderboard%3Fq%3DAce#history-title'
        );
        const match = new URL(contextHref('/matches/123', source), source);
        expect(safeReturnHref(match.searchParams.get('returnTo'), '/matches')).toBe(
            source.pathname + source.search + source.hash
        );
        expect(returnLabel(match.searchParams.get('returnTo')!)).toBe('Back to player');
        expect(returnLabel('/collections?view=history&launches=30')).toBe('Back to launch history');
    });

    it('retains Maintenance filters and a selected result when opening a detail', () => {
        const source = '/maintenance?view=activity&state=failed&offset=25#operation-12';
        const target = new URL(contextHref('/provisioning/12', source), 'http://localhost');
        expect(safeReturnHref(target.searchParams.get('returnTo'), '/')).toBe(source);
        expect(returnLabel(source)).toBe('Back to Maintenance');
    });

    it.each(['/activity', '/operations'])(
        'replaces retired %s return links with their current history',
        (path) => {
            const source = `${path}?server=town&host=host-1&state=failed&offset=25`;
            const expected = '/servers/town?tab=history&host=host-1&state=failed&offset=25';
            expect(safeReturnHref(source, '/')).toBe(expected);
            const target = new URL(contextHref('/provisioning/12', source), 'http://localhost');
            expect(target.searchParams.get('returnTo')).toBe(expected);
            expect(returnLabel(expected)).toBe('Back to server');
        }
    );

    it('preserves the selected diagnostic tab on both sides of a contextual link', () => {
        const url = new URL(
            contextHref(
                '/servers/t5_zombie_theater_1?tab=logs&log=console',
                '/maintenance/incident?returnTo=%2Fmaintenance%3Fview%3Dactivity'
            ),
            'http://localhost'
        );
        expect(url.searchParams.get('tab')).toBe('logs');
        expect(url.searchParams.get('log')).toBe('console');
        expect(url.searchParams.get('returnTo')).toBe(
            '/maintenance/incident?returnTo=%2Fmaintenance%3Fview%3Dactivity'
        );
    });

    it.each([
        '//evil.test',
        'https://evil.test/',
        '/api/auth/logout',
        '/login',
        '/hosts/../../api/hosts',
        '/\\evil.test',
        '/hosts\n/42',
        '/unknown',
        '/' + 'x'.repeat(12000)
    ])('rejects unsafe or unsupported return paths: %s', (value) => {
        expect(safeReturnHref(value, '/betas')).toBe('/betas');
    });
});