import { describe, expect, it } from 'vitest';
import {
	cents,
	csvDate,
	importCents,
	parseCsv,
	parseTransactionImport,
	planImport
} from './money-tracker';

describe('transaction import parsing', () => {
	it('handles quoted commas and semicolon-separated European amounts', () => {
		expect(
			parseCsv('date;account;description;amount\n23/09/2026;Cash;"Food; drinks";-12,50')[1]
		).toEqual(['23/09/2026', 'Cash', 'Food; drinks', '-12,50']);
		expect(
			parseCsv('date,account,description,amount\n2026-09-23,Cash,"Food, drinks",-12.50')[1][2]
		).toBe('Food, drinks');
		expect(csvDate('23/09/2026')).toBe('2026-09-23');
		expect(cents('-12,50')).toBe(-1250);
	});

	it('rejects invalid dates and amounts rather than altering them', () => {
		expect(csvDate('31/02/2026')).toBeNull();
		expect(csvDate('Sat 1 Aug 2025')).toBeNull();
		expect(cents('1.234,56')).toBeUndefined();
	});

	it('accepts the spreadsheet export with tabs, spacer rows, named dates and euro amounts', () => {
		const rows = parseCsv(
			'date\taccount\tdescription\tamount\n' +
				'Fri 1 Aug 2025\tDaily\tStart balance\t€123.45\n' +
				'Fri 1 Aug 2025\tBusiness\tStart balance\t-€12.34\n' +
				'Fri 1 Aug 2025\tShared\tStart balance\t€1,234.56\n' +
				'\t\t\t\n' +
				'Sat 2 Aug 2025\tShared\tExample bill\t-€1,234.50\n'
		);
		expect(rows).toHaveLength(5);
		expect(rows[4]).toEqual(['Sat 2 Aug 2025', 'Shared', 'Example bill', '-€1,234.50']);
		expect(csvDate(rows[1][0])).toBe('2025-08-01');
		expect(csvDate(rows[4][0])).toBe('2025-08-02');
		expect(rows.slice(1).map((row) => importCents(row[3]))).toEqual([
			12345, -1234, 123456, -123450
		]);
		expect(
			parseCsv(
				'date,account,description,amount\n"Fri 1 Aug 2025",Shared,Start balance,"€1,234.56"'
			)[1]
		).toEqual(['Fri 1 Aug 2025', 'Shared', 'Start balance', '€1,234.56']);
		expect(
			parseCsv('date,account,description,amount\nFri 1 Aug 2025,Shared,Start balance,€1,234.56')[1]
		).toHaveLength(5);
		expect(
			parseTransactionImport(
				'date\taccount\tdescription\tamount\n' +
					'Sat 2 Aug 2025\tShared\tExample bill\t-€1,234.50\n' +
					'\t\t\t\n' +
					'Fri 1 Aug 2025\tDaily\tStart balance\t€123.45\n' +
					'Fri 1 Aug 2025\tBusiness\tStart balance\t-€12.34\n'
			).map((row) => [row.date, row.account, row.amountCents])
		).toEqual([
			['2025-08-01', 'Daily', 12345],
			['2025-08-01', 'Business', -1234],
			['2025-08-02', 'Shared', -123450]
		]);
		expect(() =>
			parseTransactionImport(
				'date,account,description,amount\nFri 1 Aug 2025,Shared,Start balance,€1,234.56'
			)
		).toThrow('Quote values containing commas');
	});
});

describe('revolut statements and import dedupe', () => {
	const statement =
		'Type,Product,Started Date,Completed Date,Description,Amount,Fee,Currency,State,Balance\n' +
		'CARD_PAYMENT,Current,2026-10-01 10:00:00,2026-10-02 09:00:00,Albert Heijn,-12.34,0.00,EUR,COMPLETED,100.00\n' +
		'TOPUP,Current,2026-10-03 10:00:00,,Pending top-up,50.00,0.00,EUR,PENDING,\n' +
		'TRANSFER,Current,2026-10-04 10:00:00,2026-10-04 10:00:01,To Joint,-100.00,0.50,EUR,COMPLETED,0.00\n' +
		'CARD_PAYMENT,Current,2026-10-05 10:00:00,2026-10-05 11:00:00,Coffee,-3.00,0.00,USD,COMPLETED,0.00\n';

	it('keeps completed EUR rows, uses the completed date and deducts fees', () => {
		const rows = parseTransactionImport(statement, 'Revolut');
		expect(rows.map((row) => [row.date, row.account, row.description, row.amountCents])).toEqual([
			['2026-10-02', 'Revolut', 'Albert Heijn', -1234],
			['2026-10-04', 'Revolut', 'To Joint', -10050]
		]);
		expect(rows[0].externalId).toMatch(/^csv:[0-9a-f]{32}$/);
		expect(parseTransactionImport(statement, 'Revolut')[0].externalId).toBe(rows[0].externalId);
		expect(() => parseTransactionImport(statement)).toThrow('Choose which account');
	});

	it('gives identical rows in one file distinct, stable ids', () => {
		const file =
			'date,account,description,amount\n2026-10-01,Cash,Kiosk,-2\n2026-10-01,Cash,Kiosk,-2\n';
		const [a, b] = parseTransactionImport(file);
		expect(a.externalId).not.toBe(b.externalId);
		expect(parseTransactionImport(file).map((row) => row.externalId)).toEqual([
			a.externalId,
			b.externalId
		]);
	});

	it('skips rows already imported or already entered by hand (±1 day)', () => {
		const rows = [
			{ accountId: 1, date: '2026-10-02', amountCents: -1234, externalId: 'csv:a' },
			{ accountId: 1, date: '2026-10-02', amountCents: -1234, externalId: 'csv:b' },
			{ accountId: 1, date: '2026-10-04', amountCents: -500, externalId: 'csv:c' },
			{ accountId: 2, date: '2026-10-04', amountCents: -500, externalId: 'csv:d' }
		];
		const existing = [
			{ id: 10, accountId: 1, date: '2026-10-01', amountCents: -1234, externalId: null },
			{ id: 11, accountId: 1, date: '2026-10-04', amountCents: -500, externalId: 'csv:c' }
		];
		const { insert, duplicates } = planImport(rows, existing);
		expect(insert.map((row) => row.externalId)).toEqual(['csv:b', 'csv:d']);
		expect(duplicates).toBe(2);
	});
});