import { describe, test, expect, beforeEach, afterEach } from 'bun:test';
import { eq, and } from 'drizzle-orm';
import { testDb } from '$lib/server/db/test';
import { analyticsEvents } from '$lib/server/db/schema';
import {
	recordEvent,
	isEventName,
	encodeMetadata
} from '$lib/server/stats/events';
import { MAX_METADATA_BYTES } from '$lib/types/stats';

async function clear() {
	await testDb.delete(analyticsEvents);
}

describe('analytics events', () => {
	beforeEach(clear);
	afterEach(clear);

	test('allowlist accepts known event names and rejects others', () => {
		expect(isEventName('verse_served')).toBe(true);
		expect(isEventName('donate_click')).toBe(true);
		expect(isEventName('not_a_real_event')).toBe(false);
		expect(isEventName('')).toBe(false);
	});

	test('metadata is capped', () => {
		const small = encodeMetadata({ utm_source: 'bluesky' });
		expect(small).toBe('{"utm_source":"bluesky"}');
		const big = encodeMetadata({ blob: 'x'.repeat(MAX_METADATA_BYTES + 100) });
		expect(big).toBe('{"truncated":true}');
		expect(encodeMetadata(null)).toBeNull();
	});

	test('records a normal event', async () => {
		const inserted = await recordEvent(
			{ name: 'donate_click', anonymousId: 'anon-1' },
			testDb
		);
		expect(inserted).toBe(true);
		const rows = await testDb.select().from(analyticsEvents);
		expect(rows).toHaveLength(1);
		expect(rows[0].name).toBe('donate_click');
	});

	test('verse_served is deduped per player + date', async () => {
		const first = await recordEvent(
			{ name: 'verse_served', anonymousId: 'anon-1', date: '2026-09-01' },
			testDb
		);
		const second = await recordEvent(
			{ name: 'verse_served', anonymousId: 'anon-1', date: '2026-09-01' },
			testDb
		);
		expect(first).toBe(true);
		expect(second).toBe(false);
		const rows = await testDb
			.select()
			.from(analyticsEvents)
			.where(
				and(
					eq(analyticsEvents.name, 'verse_served'),
					eq(analyticsEvents.anonymousId, 'anon-1')
				)
			);
		expect(rows).toHaveLength(1);
	});

	test('other event names are not deduped', async () => {
		await recordEvent({ name: 'share', anonymousId: 'anon-1', date: '2026-09-01' }, testDb);
		await recordEvent({ name: 'share', anonymousId: 'anon-1', date: '2026-09-01' }, testDb);
		const rows = await testDb.select().from(analyticsEvents);
		expect(rows).toHaveLength(2);
	});

	test('user attribution is stored', async () => {
		await recordEvent(
			{ name: 'share_copy', anonymousId: 'anon-1', userId: 'user-9', metadata: { snippet: true } },
			testDb
		);
		const [row] = await testDb.select().from(analyticsEvents);
		expect(row.userId).toBe('user-9');
		expect(JSON.parse(row.metadata!)).toEqual({ snippet: true });
	});
});