import { describe, it, expect } from 'vitest';
import { createDati } from '@/glob/dati_engine';

const DATE = new Date(2026, 1, 28, 10, 30, 0); // 28 feb 2026, 10:30:00

describe('createDati', () => {

    describe('locale reactivo via función', () => {

        it('responde a cambios de locale sin recrear el módulo', () => {
            let locale = 'es';
            const dati = createDati({}, () => locale);
            expect(dati.f(DATE)).toBe('28 de febrero de 2026');

            locale = 'en';
            expect(dati.f(DATE)).toBe('February 28, 2026');
        });

        it('locale por llamada tiene prioridad sobre defaultLocale', () => {
            let locale = 'es';
            const dati = createDati({}, () => locale);
            expect(dati.f(DATE, 'long', 'de')).toBe('28. Februar 2026');
        });

    });

    describe('f() — sin opciones (fecha larga por defecto)', () => {

        it('formatea fecha larga en es', () => {
            const dati = createDati({}, 'es');
            expect(dati.f(DATE)).toBe('28 de febrero de 2026');
        });

        it('formatea fecha larga en en', () => {
            const dati = createDati({}, 'en');
            expect(dati.f(DATE)).toBe('February 28, 2026');
        });

        it('formatea fecha larga en de', () => {
            const dati = createDati({}, 'de');
            expect(dati.f(DATE)).toBe('28. Februar 2026');
        });

        it('formatea fecha larga en fr', () => {
            const dati = createDati({}, 'fr');
            expect(dati.f(DATE)).toBe('28 février 2026');
        });

    });

    describe('f() — opción string shortcut', () => {

        it('short — fecha corta en es', () => {
            const dati = createDati({}, 'es');
            expect(dati.f(DATE, 'short')).toBe('28/2/26');
        });

        it('short — fecha corta en en', () => {
            const dati = createDati({}, 'en');
            expect(dati.f(DATE, 'short')).toBe('2/28/26');
        });

        it('long equivale a sin opciones', () => {
            const dati = createDati({}, 'es');
            expect(dati.f(DATE, 'long')).toBe(dati.f(DATE));
        });

    });

    describe('f() — solo fecha', () => {

        it('date long en es', () => {
            const dati = createDati({}, 'es');
            expect(dati.f(DATE, { date: 'long' })).toBe('28 de febrero de 2026');
        });

        it('date short en es', () => {
            const dati = createDati({}, 'es');
            expect(dati.f(DATE, { date: 'short' })).toBe('28/2/26');
        });

    });

    describe('f() — solo hora', () => {

        it('time short 24h en es', () => {
            const dati = createDati({ selectedTimeFormat: '24h' }, 'es');
            expect(dati.f(DATE, { time: 'short' })).toBe('10:30');
        });

        it('time short 12h en en', () => {
            const dati = createDati({ selectedTimeFormat: '12h' }, 'en');
            expect(dati.f(DATE, { time: 'short' })).toBe('10:30 AM');
        });

        it('time long 24h en es', () => {
            const dati = createDati({ selectedTimeFormat: '24h' }, 'es');
            expect(dati.f(DATE, { time: 'long' })).toContain('10:30:00');
        });

    });

    describe('f() — fecha y hora combinadas', () => {

        it('date long + time short en es', () => {
            const dati = createDati({ selectedTimeFormat: '24h' }, 'es');
            const result = dati.f(DATE, { date: 'long', time: 'short' });
            expect(result).toContain('28 de febrero de 2026');
            expect(result).toContain('10:30');
        });

        it('date short + time short en en 12h', () => {
            const dati = createDati({ selectedTimeFormat: '12h' }, 'en');
            const result = dati.f(DATE, { date: 'short', time: 'short' });
            expect(result).toContain('2/28/26');
            expect(result).toContain('10:30 AM');
        });

    });

    describe('setTimeFormat / getTimeFormat', () => {

        it('cambia el formato de hora', () => {
            const dati = createDati({ selectedTimeFormat: '12h' }, 'es');
            const result12h = dati.f(DATE, { time: 'short' });
            const result24h = new Intl.DateTimeFormat('es', { timeStyle: 'short', hour12: false }).format(DATE);

            // 12h y 24h deben ser distintos
            expect(result12h).not.toBe(result24h);

            dati.setTimeFormat('24h');
            expect(dati.f(DATE, { time: 'short' })).toBe(result24h);
        });

        it('getTimeFormat devuelve el valor actual', () => {
            const dati = createDati({ selectedTimeFormat: '12h' }, 'es');
            expect(dati.getTimeFormat()).toBe('12h');
            dati.setTimeFormat('24h');
            expect(dati.getTimeFormat()).toBe('24h');
        });

    });

    describe('setDateOrder / getDateOrder', () => {

        it('getDateOrder devuelve el valor configurado', () => {
            const dati = createDati({ selectedDateOrder: 'MDY' }, 'es');
            expect(dati.getDateOrder()).toBe('MDY');
        });

        it('setDateOrder cambia el orden', () => {
            const dati = createDati({}, 'es');
            dati.setDateOrder('YMD');
            expect(dati.getDateOrder()).toBe('YMD');
        });

    });

});