import { describe, expect, it } from 'vitest'
import { eq } from 'drizzle-orm'
import { db } from '~/data/db'
import { brands, postTags, posts, projects, tags } from '~/data/schema'
import { findPost, listPosts } from '~/data/repositories/posts'
import { postTypeId } from '../support/post-types'

async function seed() {
	const [brand] = await db.insert(brands).values({ slug: 'pocket-rocket', name: 'Pocket Rocket' }).returning()
	const [trakk] = await db.insert(projects).values({ brandId: brand!.id, slug: 'trakk', name: 'Trakk', code: 'TRK', color: '#2e7d5b' }).returning()
	const [mta] = await db.insert(projects).values({ brandId: brand!.id, slug: 'mta360', name: 'MTA360' }).returning()

	await db.insert(posts).values([
		{
			projectId: trakk!.id, number: 1, slug: 'regel-engine', title: 'Regel-Engine',
			typeId: postTypeId('feature'), audience: 'customer', status: 'published',
			publishAt: new Date('2026-07-30T08:00:00Z'),
		},
		{
			projectId: trakk!.id, number: 2, slug: 'interner-umbau', title: 'Interner Umbau',
			typeId: postTypeId('improvement'), audience: 'internal', status: 'published',
			publishAt: new Date('2026-07-29T08:00:00Z'),
		},
		{
			projectId: trakk!.id, number: 3, slug: 'noch-entwurf', title: 'Noch Entwurf',
			typeId: postTypeId('fix'), audience: 'public', status: 'draft',
		},
		{
			projectId: mta!.id, number: 1, slug: 'spaltenmenue', title: 'Spaltenmenü',
			typeId: postTypeId('improvement'), audience: 'public', status: 'published',
			publishAt: new Date('2026-07-28T08:00:00Z'),
		},
	])

	return { trakk: trakk!, mta: mta! }
}

describe('listPosts', () => {
	it('liefert nur veröffentlichte Beiträge, neueste zuerst', async () => {
		await seed()

		const result = await listPosts({ scope: 'internal', page: 1, perPage: 25 })

		expect(result.items.map(item => item.slug)).toEqual(['regel-engine', 'interner-umbau', 'spaltenmenue'])
		expect(result.total).toBe(3)
	})

	it('verbirgt interne Beiträge vor Kunden', async () => {
		await seed()

		const result = await listPosts({ scope: 'customer', page: 1, perPage: 25 })

		expect(result.items.map(item => item.slug)).toEqual(['regel-engine', 'spaltenmenue'])
	})

	it('filtert nach Projekt', async () => {
		await seed()

		const result = await listPosts({ scope: 'internal', projectSlug: 'mta360', page: 1, perPage: 25 })

		expect(result.items.map(item => item.slug)).toEqual(['spaltenmenue'])
	})

	it('filtert nach Zeitpunkt und Typ', async () => {
		await seed()

		const since = await listPosts({ scope: 'internal', since: new Date('2026-07-29T00:00:00Z'), page: 1, perPage: 25 })
		const byType = await listPosts({ scope: 'internal', type: 'feature', page: 1, perPage: 25 })

		expect(since.items).toHaveLength(2)
		expect(byType.items.map(item => item.slug)).toEqual(['regel-engine'])
	})

	it('teilt in Seiten und meldet die Gesamtzahl', async () => {
		await seed()

		const result = await listPosts({ scope: 'internal', page: 2, perPage: 2 })

		expect(result.items.map(item => item.slug)).toEqual(['spaltenmenue'])
		expect(result.total).toBe(3)
	})

	it('liefert geplante Beiträge nicht aus', async () => {
		const { trakk } = await seed()
		await db.insert(posts).values({
			projectId: trakk.id, number: 4, slug: 'geplanter-beitrag', title: 'Geplanter Beitrag',
			typeId: postTypeId('feature'), audience: 'public', status: 'scheduled',
			publishAt: new Date('2026-07-31T08:00:00Z'),
		})

		const result = await listPosts({ scope: 'internal', page: 1, perPage: 25 })

		expect(result.items.map(item => item.slug)).not.toContain('geplanter-beitrag')
		expect(result.total).toBe(3)
	})

	it('meldet beim Schlagwort-Filter die Gesamtzahl unabhängig von der Seitengröße', async () => {
		const { trakk } = await seed()
		const [tag] = await db.insert(tags).values({ projectId: trakk.id, slug: 'engine', label: 'Engine' }).returning()
		const trakkPosts = await db.select({ id: posts.id, slug: posts.slug }).from(posts).where(eq(posts.projectId, trakk.id))
		const tagged = trakkPosts.filter(row => row.slug === 'regel-engine' || row.slug === 'interner-umbau')
		await db.insert(postTags).values(tagged.map(row => ({ postId: row.id, tagId: tag!.id })))

		const result = await listPosts({ scope: 'internal', tag: 'engine', page: 1, perPage: 1 })

		expect(result.items.map(item => item.slug)).toEqual(['regel-engine'])
		expect(result.total).toBe(2)
	})

	it('grenzt beim Schlagwort-Filter auf das gesuchte Schlagwort ein und zählt keinen Beitrag doppelt', async () => {
		const { trakk } = await seed()
		const [engine] = await db.insert(tags).values({ projectId: trakk.id, slug: 'engine', label: 'Engine' }).returning()
		const [worker] = await db.insert(tags).values({ projectId: trakk.id, slug: 'worker', label: 'Worker' }).returning()
		const [regel] = await db.select({ id: posts.id }).from(posts).where(eq(posts.slug, 'regel-engine'))
		const [umbau] = await db.select({ id: posts.id }).from(posts).where(eq(posts.slug, 'interner-umbau'))

		await db.insert(postTags).values([
			{ postId: regel!.id, tagId: engine!.id },
			{ postId: regel!.id, tagId: worker!.id },
			{ postId: umbau!.id, tagId: worker!.id },
		])

		const byEngine = await listPosts({ scope: 'internal', tag: 'engine', page: 1, perPage: 25 })
		const byWorker = await listPosts({ scope: 'internal', tag: 'worker', page: 1, perPage: 25 })

		expect(byEngine.items.map(item => item.slug)).toEqual(['regel-engine'])
		expect(byEngine.total).toBe(1)
		expect(byWorker.items.map(item => item.slug)).toEqual(['regel-engine', 'interner-umbau'])
		expect(byWorker.total).toBe(2)
	})

	it('teilt bei gleichem Veröffentlichungszeitpunkt ohne Überschneidung und ohne Lücke in Seiten', async () => {
		const { trakk } = await seed()
		const sameMoment = new Date('2026-07-20T08:00:00Z')
		await db.insert(posts).values([
			{ projectId: trakk.id, number: 10, slug: 'gleich-a', title: 'Gleich A', audience: 'public', status: 'published', publishAt: sameMoment },
			{ projectId: trakk.id, number: 11, slug: 'gleich-b', title: 'Gleich B', audience: 'public', status: 'published', publishAt: sameMoment },
			{ projectId: trakk.id, number: 12, slug: 'gleich-c', title: 'Gleich C', audience: 'public', status: 'published', publishAt: sameMoment },
		])

		const first = await listPosts({ scope: 'internal', page: 1, perPage: 3 })
		const second = await listPosts({ scope: 'internal', page: 2, perPage: 3 })
		const seen = [...first.items, ...second.items].map(item => item.slug)

		expect(first.total).toBe(6)
		expect(new Set(seen).size).toBe(6)
	})

	it('stellt einen veröffentlichten Beitrag ohne Zeitpunkt hinten an', async () => {
		const { trakk } = await seed()
		await db.insert(posts).values({
			projectId: trakk.id, number: 20, slug: 'ohne-zeitpunkt', title: 'Ohne Zeitpunkt',
			audience: 'public', status: 'published',
		})

		const result = await listPosts({ scope: 'internal', page: 1, perPage: 25 })

		expect(result.items.at(-1)?.slug).toBe('ohne-zeitpunkt')
	})
})

describe('findPost', () => {
	it('liefert einen Beitrag mit Projektangabe', async () => {
		await seed()

		const post = await findPost('regel-engine', 'customer')

		expect(post?.projectSlug).toBe('trakk')
		expect(post?.title).toBe('Regel-Engine')
	})

	it('liefert Kürzel und Farbe des Projekts mit', async () => {
		await seed()

		const mitKuerzel = await findPost('regel-engine', 'customer')
		const ohneKuerzel = await findPost('spaltenmenue', 'customer')

		expect(mitKuerzel?.projectCode).toBe('TRK')
		expect(mitKuerzel?.projectColor).toBe('#2e7d5b')
		expect(ohneKuerzel?.projectCode).toBeNull()
	})

	it('liefert nichts, wenn die Zielgruppe es nicht erlaubt', async () => {
		await seed()

		await expect(findPost('interner-umbau', 'customer')).resolves.toBeUndefined()
	})
})