import { describe, expect, it } from 'vitest'
import { pageCount, readMonth, readPage, readText, readYear } from '~/lib/query'

describe('readText', () => {
	it('nimmt den ersten Wert und wirft Leerraum weg', () => {
		expect(readText(['  Spalten ', 'zweite'])).toBe('Spalten')
		expect(readText('   ')).toBeUndefined()
		expect(readText(undefined)).toBeUndefined()
	})
})

describe('readPage', () => {
	it('fällt auf Seite eins zurück', () => {
		expect(readPage('3')).toBe(3)
		expect(readPage('0')).toBe(1)
		expect(readPage('-2')).toBe(1)
		expect(readPage('abc')).toBe(1)
		expect(readPage(undefined)).toBe(1)
	})
})

describe('readYear', () => {
	it('nimmt nur vierstellige Jahre', () => {
		expect(readYear('2026')).toBe(2026)
		expect(readYear('26')).toBeUndefined()
		expect(readYear('20261')).toBeUndefined()
		expect(readYear('zweitausend')).toBeUndefined()
	})
})

describe('readMonth', () => {
	it('nimmt nur Monate von eins bis zwölf', () => {
		expect(readMonth('07')).toBe(7)
		expect(readMonth('7')).toBe(7)
		expect(readMonth('12')).toBe(12)
		expect(readMonth('0')).toBeUndefined()
		expect(readMonth('13')).toBeUndefined()
		expect(readMonth('007')).toBeUndefined()
	})
})

describe('pageCount', () => {
	it('zählt mindestens eine Seite', () => {
		expect(pageCount(0, 10)).toBe(1)
		expect(pageCount(10, 10)).toBe(1)
		expect(pageCount(11, 10)).toBe(2)
		expect(pageCount(7, 3)).toBe(3)
	})
})