import {aggregateReport} from '../../src/models/feedback/admin/reports.admin.service';
import {AnswerRow} from '../../src/models/feedback/admin/reports.admin.interface';

const eventMeta = {eventId: 1, name: 'Sommerkonzert', eventDate: '2026-08-01', feedbackDeadline: '2026-08-15T23:59:59'};
const emptyNewsletter = {total: 0, sent: 0, pending: 0, failed: 0};

const row = (overrides: Partial<AnswerRow>): AnswerRow => ({
	submissionId: 1,
	submittedAt: '2026-08-02T10:00:00.000Z',
	questionId: 1,
	questionLabel: 'Q',
	questionType: 'FREE_TEXT',
	songId: null,
	songTitle: null,
	rating: null,
	textAnswer: null,
	...overrides
});

describe('aggregateReport - song picks', () => {
	it('counts votes per song and sorts by votes descending', () => {
		const answers: AnswerRow[] = [
			row({submissionId: 1, questionId: 5, questionLabel: 'Lieblingsstück?', questionType: 'SONG_PICK', songId: 10, songTitle: 'Abendlied'}),
			row({submissionId: 2, questionId: 5, questionLabel: 'Lieblingsstück?', questionType: 'SONG_PICK', songId: 10, songTitle: 'Abendlied'}),
			row({submissionId: 3, questionId: 5, questionLabel: 'Lieblingsstück?', questionType: 'SONG_PICK', songId: 11, songTitle: 'Morgenlied'})
		];
		const report = aggregateReport(eventMeta, {totalSubmissions: 3, firstSubmissionAt: null, lastSubmissionAt: null}, answers, 0, emptyNewsletter);
		expect(report.songPicks).toHaveLength(1);
		expect(report.songPicks[0].totalVotes).toBe(3);
		expect(report.songPicks[0].results).toEqual([
			{songId: 10, title: 'Abendlied', votes: 2},
			{songId: 11, title: 'Morgenlied', votes: 1}
		]);
	});

	it('keeps separate SONG_PICK questions in separate groups', () => {
		const answers: AnswerRow[] = [
			row({questionId: 5, questionLabel: 'Frage A', questionType: 'SONG_PICK', songId: 10, songTitle: 'Abendlied'}),
			row({questionId: 6, questionLabel: 'Frage B', questionType: 'SONG_PICK', songId: 11, songTitle: 'Morgenlied'})
		];
		const report = aggregateReport(eventMeta, {totalSubmissions: 2, firstSubmissionAt: null, lastSubmissionAt: null}, answers, 0, emptyNewsletter);
		expect(report.songPicks).toHaveLength(2);
	});
});

describe('aggregateReport - song ratings', () => {
	it('averages ratings per song, rounded to one decimal, sorted descending', () => {
		const answers: AnswerRow[] = [
			row({questionId: 7, questionLabel: 'Bewertung', questionType: 'SONG_RATING', songId: 10, songTitle: 'Abendlied', rating: 5}),
			row({questionId: 7, questionLabel: 'Bewertung', questionType: 'SONG_RATING', songId: 10, songTitle: 'Abendlied', rating: 4}),
			row({questionId: 7, questionLabel: 'Bewertung', questionType: 'SONG_RATING', songId: 11, songTitle: 'Morgenlied', rating: 3})
		];
		const report = aggregateReport(eventMeta, {totalSubmissions: 2, firstSubmissionAt: null, lastSubmissionAt: null}, answers, 0, emptyNewsletter);
		expect(report.songRatings[0].results).toEqual([
			{songId: 10, title: 'Abendlied', average: 4.5, count: 2},
			{songId: 11, title: 'Morgenlied', average: 3, count: 1}
		]);
	});
});

describe('aggregateReport - free text', () => {
	it('sorts newest first and caps at 500 with hasMore', () => {
		const answers: AnswerRow[] = Array.from({length: 501}, (_, i) =>
			row({
				submissionId: i,
				questionId: 9,
				questionLabel: 'Sonstiges',
				questionType: 'FREE_TEXT',
				textAnswer: `Antwort ${i}`,
				submittedAt: new Date(2026, 0, 1, 0, 0, i).toISOString()
			})
		);
		const report = aggregateReport(eventMeta, {totalSubmissions: 501, firstSubmissionAt: null, lastSubmissionAt: null}, answers, 0, emptyNewsletter);
		expect(report.freeText[0].responses).toHaveLength(500);
		expect(report.freeText[0].hasMore).toBe(true);
		expect(report.freeText[0].responses[0].text).toBe('Antwort 500');
	});

	it('does not set hasMore when at or under the cap', () => {
		const answers: AnswerRow[] = [row({questionId: 9, questionLabel: 'Sonstiges', questionType: 'FREE_TEXT', textAnswer: 'Danke!'})];
		const report = aggregateReport(eventMeta, {totalSubmissions: 1, firstSubmissionAt: null, lastSubmissionAt: null}, answers, 0, emptyNewsletter);
		expect(report.freeText[0].hasMore).toBe(false);
	});
});

describe('aggregateReport - top-level fields', () => {
	it('passes through submission stats, guest book count, and newsletter counts unchanged', () => {
		const report = aggregateReport(
			eventMeta,
			{totalSubmissions: 42, firstSubmissionAt: '2026-08-02T10:00:00.000Z', lastSubmissionAt: '2026-08-10T18:00:00.000Z'},
			[],
			7,
			{total: 10, sent: 6, pending: 2, failed: 2}
		);
		expect(report.totalSubmissions).toBe(42);
		expect(report.firstSubmissionAt).toBe('2026-08-02T10:00:00.000Z');
		expect(report.lastSubmissionAt).toBe('2026-08-10T18:00:00.000Z');
		expect(report.guestBookCount).toBe(7);
		expect(report.newsletter).toEqual({total: 10, sent: 6, pending: 2, failed: 2});
		expect(report.event).toEqual(eventMeta);
	});

	it('produces empty arrays for an event with no submissions', () => {
		const report = aggregateReport(eventMeta, {totalSubmissions: 0, firstSubmissionAt: null, lastSubmissionAt: null}, [], 0, emptyNewsletter);
		expect(report.songPicks).toEqual([]);
		expect(report.songRatings).toEqual([]);
		expect(report.freeText).toEqual([]);
	});
});