import { describe, expect, it } from 'vitest'
import { canTransition } from '~/domain/post-status'
import type { PostStatus } from '~/domain/types'

describe('canTransition', () => {
	it('erlaubt den Weg vom Entwurf bis zur Veröffentlichung', () => {
		expect(canTransition('draft', 'review')).toBe(true)
		expect(canTransition('review', 'published')).toBe(true)
		expect(canTransition('draft', 'published')).toBe(true)
		expect(canTransition('draft', 'scheduled')).toBe(true)
		expect(canTransition('scheduled', 'published')).toBe(true)
	})

	it('erlaubt Zurückziehen und Wiederaufnahme', () => {
		expect(canTransition('published', 'archived')).toBe(true)
		expect(canTransition('archived', 'draft')).toBe(true)
	})

	it('verbietet Sprünge zurück aus der Veröffentlichung in den Entwurf', () => {
		expect(canTransition('published', 'draft')).toBe(false)
		expect(canTransition('published', 'review')).toBe(false)
	})

	it('verbietet gleichbleibenden Status als Übergang', () => {
		expect(canTransition('draft', 'draft')).toBe(false)
	})
})

describe('canTransition deckt alle 25 Paare ab', () => {
	const states: PostStatus[] = ['draft', 'review', 'scheduled', 'published', 'archived']

	const expected: Record<PostStatus, PostStatus[]> = {
		draft: ['review', 'scheduled', 'published', 'archived'],
		review: ['draft', 'scheduled', 'published', 'archived'],
		scheduled: ['draft', 'published', 'archived'],
		published: ['archived'],
		archived: ['draft'],
	}

	for (const from of states) {
		for (const to of states) {
			const allowed = expected[from].includes(to)

			it(`${from} nach ${to}: ${allowed}`, () => {
				expect(canTransition(from, to)).toBe(allowed)
			})
		}
	}
})