import { describe, expect, it } from 'vitest';
import { toE164, isE164, formatForDisplay } from '../../src/lib/phone.ts';

describe('toE164', () => {
    it('normalizes 10-digit NANP', () => {
        expect(toE164('289-206-7080')).toBe('+12892067080');
        expect(toE164('(289) 206-7080')).toBe('+12892067080');
        expect(toE164('289.206.7080')).toBe('+12892067080');
        expect(toE164('2892067080')).toBe('+12892067080');
    });

    it('normalizes 11-digit NANP starting with 1', () => {
        expect(toE164('12892067080')).toBe('+12892067080');
        expect(toE164('1-289-206-7080')).toBe('+12892067080');
    });

    it('preserves +-prefixed E.164', () => {
        expect(toE164('+442071838750')).toBe('+442071838750');
        expect(toE164('+1 289 206 7080')).toBe('+12892067080');
    });

    it('throws on inputs that cannot be normalized', () => {
        expect(() => toE164('abc')).toThrow();
        expect(() => toE164('123')).toThrow();
        expect(() => toE164('')).toThrow();
    });
});

describe('isE164', () => {
    it('recognizes valid E.164', () => {
        expect(isE164('+12892067080')).toBe(true);
        expect(isE164('+442071838750')).toBe(true);
    });

    it('rejects invalid inputs', () => {
        expect(isE164('2892067080')).toBe(false);
        expect(isE164('+0123456789')).toBe(false);
        expect(isE164(undefined)).toBe(false);
        expect(isE164(12345)).toBe(false);
    });
});

describe('formatForDisplay', () => {
    it('formats NANP numbers', () => {
        expect(formatForDisplay('+12892067080')).toBe('(289) 206-7080');
    });

    it('returns non-NANP numbers unchanged', () => {
        expect(formatForDisplay('+442071838750')).toBe('+442071838750');
    });
});