import { describe, expect, it } from 'vitest'
import { buildMessage, groupByProject, windowFor } from '~/lib/weekly-report'
import type { PostListItem } from '~/data/repositories/posts'

function item(overrides: Partial<PostListItem> = {}): PostListItem {
	return {
		id: 'c0ffee00-0000-4000-8000-000000000001',
		slug: 'regel-engine',
		title: 'Regel-Engine: Bedingung trifft Aktion',
		teaser: null,
		type: { id: 't1', key: 'feature', labelDe: 'Feature', labelEn: 'Feature', color: '#2b4a9b' },
		audience: 'internal',
		publishAt: new Date('2026-07-30T09:00:00.000Z'),
		authorName: 'Paul',
		coverMediaId: null,
		number: 142,
		projectSlug: 'trakk',
		projectName: 'Trakk',
		projectCode: 'TRK',
		projectColor: '#2e7d5b',
		...overrides,
	}
}

const origin = 'https://logbuch.nyo.de'

describe('windowFor', () => {
	it('spannt sieben Tage bis zum Aufruf', () => {
		const { from, to } = windowFor(new Date('2026-08-03T06:00:00.000Z'))

		expect(to.toISOString()).toBe('2026-08-03T06:00:00.000Z')
		expect(from.toISOString()).toBe('2026-07-27T06:00:00.000Z')
	})
})

describe('groupByProject', () => {
	it('fasst Einträge je Projekt zusammen und behält die Reihenfolge', () => {
		const groups = groupByProject([
			item(),
			item({ id: 'b', slug: 'zwei', projectSlug: 'orbit', projectName: 'Orbit', projectCode: 'ORB' }),
			item({ id: 'c', slug: 'drei', number: 143 }),
		])

		expect(groups.map(group => group.slug)).toEqual(['trakk', 'orbit'])
		expect(groups[0]!.items).toHaveLength(2)
	})
})

describe('buildMessage', () => {
	const base = {
		from: new Date('2026-07-27T06:00:00.000Z'),
		to: new Date('2026-08-03T06:00:00.000Z'),
	}

	it('bleibt still, wenn nichts veröffentlicht wurde', () => {
		expect(buildMessage({ ...base, total: 0, projects: [] }, origin)).toBeNull()
	})

	it('nennt Zeitraum, Anzahl und jedes Projekt', () => {
		const projects = groupByProject([item(), item({ id: 'b', slug: 'zwei', projectSlug: 'orbit', projectName: 'Orbit', projectCode: 'ORB' })])
		const message = buildMessage({ ...base, total: 2, projects }, origin)

		expect(message?.text).toBe('Logbuch, 27.07.2026 bis 03.08.2026: 2 Einträge')

		const dump = JSON.stringify(message?.blocks)

		expect(dump).toContain('27.07.2026 bis 03.08.2026')
		expect(dump).toContain('*Trakk*')
		expect(dump).toContain('*Orbit*')
		expect(dump).toContain('TRK-0142')
		expect(dump).toContain('https://logbuch.nyo.de/trakk/regel-engine')
	})

	it('zählt einen einzelnen Eintrag im Singular', () => {
		const message = buildMessage({ ...base, total: 1, projects: groupByProject([item()]) }, origin)

		expect(message?.text).toContain('1 Eintrag')
	})

	it('verzichtet auf Emojis', () => {
		const message = buildMessage({ ...base, total: 1, projects: groupByProject([item()]) }, origin)

		expect(JSON.stringify(message)).not.toMatch(/\p{Extended_Pictographic}/u)
	})
})