import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { mount, flushPromises } from '@vue/test-utils'
import { createPinia, setActivePinia } from 'pinia'
import uiPlugin from '@nuxt/ui/vue-plugin'
import router from '@/router'
import { useSessionStore } from '@/stores/session'
import type { Article } from '@/composables/useArticles'
import ArticleView from '../ArticleView.vue'

const NOW = new Date('2026-08-26T10:00:00Z')
const HOUR_MS = 60 * 60 * 1000
const DAY_MS = 24 * HOUR_MS

function createOverlayMock() {
	let props: Record<string, unknown> | null = null
	let resolveOpen: ((value: unknown) => void) | null = null
	const create = vi.fn((_component: unknown, options: { props: Record<string, unknown> }) => {
		props = options.props
		return {
			open: () =>
				new Promise((resolve) => {
					resolveOpen = resolve
				}),
		}
	})
	return {
		create,
		getProps: () => props,
		resolveOpen: (value: unknown) => resolveOpen?.(value),
	}
}

let overlayMock: ReturnType<typeof createOverlayMock>
let toastAdd: ReturnType<typeof vi.fn>

vi.mock('@nuxt/ui/composables', async (importOriginal) => {
	const actual = await importOriginal<typeof import('@nuxt/ui/composables')>()
	return {
		...actual,
		useOverlay: () => overlayMock,
		useToast: () => ({ add: toastAdd }),
	}
})

function mockResponse(status: number, body: unknown = null) {
	return {
		ok: status >= 200 && status < 300,
		status,
		headers: { get: () => null },
		json: async () => body,
	} as unknown as Response
}

function routeFor(url: string, init?: RequestInit) {
	const method = init?.method ?? 'GET'
	return `${method} ${url}`
}

function fetchRouter(handlers: Record<string, () => Response | Promise<Response>>) {
	return vi.fn((url: string, init?: RequestInit) => {
		const key = routeFor(url, init)
		const handler = handlers[key]
		if (!handler) {
			throw new Error(`Unexpected fetch call: ${key}`)
		}
		return handler()
	})
}

function iso(offsetMs: number) {
	return new Date(NOW.getTime() - offsetMs).toISOString()
}

function sixArticleFixture(): Article[] {
	return [
		{
			id: 1,
			title: 'How we price a bathroom renovation',
			body: '',
			is_online: true,
			created_at: '2026-03-12T09:14:00Z',
			updated_at: iso(2 * HOUR_MS),
		},
		{
			id: 2,
			title: 'Choosing lime plaster for old stone walls',
			body: '',
			is_online: false,
			created_at: '2026-09-09T09:00:00Z',
			updated_at: iso(1 * DAY_MS),
		},
		{
			id: 3,
			title: 'Before and after: the Rue Verte kitchen',
			body: '',
			is_online: true,
			created_at: '2026-08-28T09:00:00Z',
			updated_at: iso(3 * DAY_MS),
		},
		{
			id: 4,
			title: 'Winter checklist for timber windows',
			body: '<img src="/i/10.png"><img src="/i/11.png"><img src="/i/12.png">',
			is_online: false,
			created_at: '2026-09-02T09:00:00Z',
			updated_at: iso(5 * DAY_MS),
		},
		{
			id: 5,
			title: 'Why we reuse original floorboards',
			body: '',
			is_online: true,
			created_at: '2026-06-14T09:00:00Z',
			updated_at: '2026-08-18T09:00:00Z',
		},
		{
			id: 6,
			title: 'Our first passive-house retrofit',
			body: '',
			is_online: true,
			created_at: '2026-04-03T09:00:00Z',
			updated_at: '2026-07-02T09:00:00Z',
		},
	]
}

let currentWrapper: Awaited<ReturnType<typeof mount>> | null = null

async function mountArticles(handlers: Record<string, () => Response | Promise<Response>>) {
	setActivePinia(createPinia())
	overlayMock = createOverlayMock()
	toastAdd = vi.fn()
	const session = useSessionStore()
	session.session = { verified: true, username: 'marta' }
	session.status = 'ready'
	global.fetch = fetchRouter(handlers) as unknown as typeof fetch
	await router.push('/article')
	const wrapper = mount(ArticleView, {
		attachTo: document.body,
		global: {
			plugins: [router, uiPlugin],
		},
	})
	currentWrapper = wrapper
	await flushPromises()
	return wrapper
}

function findButton(wrapper: Awaited<ReturnType<typeof mount>>, label: string) {
	return wrapper.findAll('button').find((button) => button.text().trim() === label)
}

async function clickTab(label: string) {
	const button = Array.from(document.body.querySelectorAll('button')).find(
		(el) => el.textContent?.trim() === label,
	) as HTMLButtonElement | undefined
	button?.focus()
	button?.dispatchEvent(
		new KeyboardEvent('keydown', { key: 'Enter', bubbles: true, cancelable: true }),
	)
	await flushPromises()
}

async function openRowMenu(wrapper: Awaited<ReturnType<typeof mount>>, title: string) {
	const button = document.body.querySelector<HTMLButtonElement>(
		`button[aria-label="Actions for ${title}"]`,
	)
	button?.click()
	await flushPromises()
}

async function chooseMenuItem(label: string) {
	const item = Array.from(document.body.querySelectorAll('[role="menuitem"]')).find(
		(el) => el.textContent?.trim() === label,
	)
	;(item as HTMLElement | undefined)?.click()
	await flushPromises()
}

beforeEach(() => {
	vi.useFakeTimers()
	vi.setSystemTime(NOW)
})

afterEach(async () => {
	currentWrapper?.unmount()
	currentWrapper = null
	vi.useRealTimers()
	await router.push('/login')
})

describe('Default — the list loads sorted by last updated, newest first', () => {
	it('shows the breadcrumb, tab counts and every row in fixture order', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		expect(wrapper.text()).toContain('All 6')
		expect(wrapper.text()).toContain('Online 4')
		expect(wrapper.text()).toContain('Drafts 2')

		const titles = sixArticleFixture().map((a) => a.title)
		const rendered = wrapper.text()
		for (const title of titles) {
			expect(rendered).toContain(title)
		}

		expect(wrapper.find('caption').text()).toBe(
			'Articles, sorted by last updated, newest first',
		)

		const firstLink = wrapper.find('[data-row-title="1"]')
		expect(firstLink.attributes('href')).toBe('/article/1/edit')
	})
})

describe('Loading — skeleton rows while the first request is in flight', () => {
	it('shows skeleton rows and aria-busy, then replaces them once resolved', async () => {
		let resolveList: (() => void) | null = null
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () =>
				new Promise((resolve) => {
					resolveList = () => resolve(mockResponse(200, sixArticleFixture()))
				}),
		})

		await vi.advanceTimersByTimeAsync(150)

		expect(wrapper.find('[aria-busy="true"]').exists()).toBe(true)

		resolveList?.()
		await vi.advanceTimersByTimeAsync(0)
		await flushPromises()

		expect(wrapper.text()).toContain('How we price a bathroom renovation')
	})
})

describe('Row menu open shows Edit, the status-appropriate action, Copy API URL and Delete…', () => {
	it('opens a menu named "Actions for Winter checklist for timber windows"', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')

		const items = Array.from(document.body.querySelectorAll('[role="menuitem"]')).map((el) =>
			el.textContent?.trim(),
		)
		expect(items).toEqual(['Edit', 'Publish', 'Copy API URL', 'Delete…'])
	})
})

describe('Copy API URL succeeds — the absolute URL is copied and confirmed', () => {
	it('writes the URL to the clipboard and raises a success toast', async () => {
		const writeText = vi.fn().mockResolvedValue(undefined)
		Object.defineProperty(navigator, 'clipboard', {
			value: { writeText },
			configurable: true,
		})

		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Copy API URL')

		expect(writeText).toHaveBeenCalledWith(`${window.location.origin}/v1/article/4`)
		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-link-copied-4',
			color: 'success',
			icon: 'i-lucide-circle-check',
			title: 'Link copied',
			description:
				'The API URL for "Winter checklist for timber windows" is on your clipboard.',
		})
	})
})

describe('Copy API URL fails — the clipboard write itself is rejected', () => {
	it('raises an error toast with no text line', async () => {
		const writeText = vi.fn().mockRejectedValue(new Error('denied'))
		Object.defineProperty(navigator, 'clipboard', {
			value: { writeText },
			configurable: true,
		})

		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Copy API URL')

		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-link-copy-failed-4',
			color: 'error',
			icon: 'i-lucide-circle-x',
			title: "Couldn't copy the link",
		})
	})
})

describe('Empty — zero articles', () => {
	it('shows the no-articles empty state and opens NewArticleModal', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, []),
		})

		expect(wrapper.text()).toContain('All 0')
		expect(wrapper.text()).toContain('Online 0')
		expect(wrapper.text()).toContain('Drafts 0')
		expect(wrapper.text()).toContain('No articles yet')
		expect(wrapper.text()).toContain(
			'Write your first one. It stays a draft until you publish it.',
		)

		await findButton(wrapper, 'New article')?.trigger('click')
		await flushPromises()

		expect(document.body.querySelector('[role="dialog"]')).toBeTruthy()
	})
})

describe('Initial load failure — an error must not render the no-articles empty state', () => {
	it('does not show "No articles yet" when GET /v1/article/ fails', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(500),
		})

		expect(wrapper.text()).not.toContain('No articles yet')
	})
})

describe('No results — a search matches nothing, but the tab counts still show the full list', () => {
	it('shows the no-results empty state, then clears the search', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		const searchInput = wrapper.find('input[type="search"]')
		await searchInput.setValue('tiles')
		await vi.advanceTimersByTimeAsync(120)
		await flushPromises()

		expect(wrapper.text()).toContain('No articles match "tiles"')
		expect(wrapper.text()).toContain(
			'Check the spelling, or search for a shorter part of the title.',
		)
		expect(wrapper.text()).toContain('All 6')
		expect(wrapper.text()).toContain('Online 4')
		expect(wrapper.text()).toContain('Drafts 2')

		await findButton(wrapper, 'Clear search')?.trigger('click')
		await flushPromises()

		expect(wrapper.text()).toContain('How we price a bathroom renovation')
		const inputEl = document.querySelector('input[placeholder="Search by title"]')
		expect(inputEl).toBe(document.activeElement)
	})
})

describe('An empty tab shows its own EmptyState, while the other tab still counts correctly', () => {
	it('shows No drafts when every article is online', async () => {
		const onlineOnly = sixArticleFixture()
			.slice(0, 4)
			.map((a) => ({ ...a, is_online: true }))
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, onlineOnly),
		})

		await clickTab('Drafts 0')

		expect(wrapper.text()).toContain('All 4')
		expect(wrapper.text()).toContain('Online 4')
		expect(wrapper.text()).toContain('Drafts 0')
		expect(wrapper.text()).toContain('No drafts')
		expect(wrapper.text()).toContain("Everything you've written is online.")
	})

	it('shows Nothing is online yet when every article is a draft', async () => {
		const draftsOnly = sixArticleFixture()
			.slice(0, 4)
			.map((a) => ({ ...a, is_online: false }))
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, draftsOnly),
		})

		await clickTab('Online 0')

		expect(wrapper.text()).toContain('All 4')
		expect(wrapper.text()).toContain('Online 0')
		expect(wrapper.text()).toContain('Drafts 4')
		expect(wrapper.text()).toContain('Nothing is online yet')
		expect(wrapper.text()).toContain('Publish a draft and it will appear on your website.')
	})
})

describe('Action in progress — publishing a row disables only that row', () => {
	it('sends the PATCH and shows the busy label for that row alone', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/4/publish?format=html': () => new Promise(() => {}),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Publish')

		expect(wrapper.text()).toContain('Publishing…')
		expect(wrapper.text()).toContain('Choosing lime plaster for old stone walls')
	})
})

describe('Published — a 200 updates the row in place and raises a toast', () => {
	it('shows the online badge, "Just now" and the success toast', async () => {
		const updated = {
			...sixArticleFixture()[3],
			is_online: true,
			updated_at: iso(0),
		}
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/4/publish?format=html': () => mockResponse(200, updated),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Publish')
		await flushPromises()

		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-published-4',
			color: 'success',
			icon: 'i-lucide-circle-check',
			title: 'Article published',
			description: '"Winter checklist for timber windows" is now online.',
		})
	})
})

describe('Action failed, publish — a 500 or a network error leaves the row unchanged and offers Retry', () => {
	it.each([
		{ name: 'a 500 response', handler: () => mockResponse(500) },
		{
			name: 'a network failure',
			handler: () => Promise.reject(new TypeError('Failed to fetch')),
		},
	])('shows Retry for $name and re-sends the same request', async ({ handler }) => {
		const patchCall = vi.fn(handler)
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/4/publish?format=html': patchCall,
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Publish')
		await flushPromises()

		expect(wrapper.text()).toContain('Winter checklist for timber windows')
		expect(wrapper.text()).not.toContain('Publishing…')
		expect(toastAdd).toHaveBeenCalledWith(
			expect.objectContaining({
				id: 'article-publish-failed-4',
				color: 'error',
				icon: 'i-lucide-circle-x',
				title: "Couldn't publish",
				description: "The server didn't respond. Nothing changed.",
				duration: 0,
			}),
		)

		const call = toastAdd.mock.calls.find(([arg]) => arg.id === 'article-publish-failed-4')
		expect(patchCall).toHaveBeenCalledTimes(1)
		call?.[0].actions[0].onClick()
		await flushPromises()
		expect(patchCall).toHaveBeenCalledTimes(2)
	})
})

describe('Action failed, unpublish — a 500 or a network error leaves the row unchanged and offers Retry', () => {
	it.each([
		{ name: 'a 500 response', handler: () => mockResponse(500) },
		{
			name: 'a network failure',
			handler: () => Promise.reject(new TypeError('Failed to fetch')),
		},
	])('shows Retry for $name and re-sends the same request', async ({ handler }) => {
		const patchCall = vi.fn(handler)
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/3/unpublish?format=html': patchCall,
		})

		await openRowMenu(wrapper, 'Before and after: the Rue Verte kitchen')
		await chooseMenuItem('Unpublish')
		await flushPromises()

		expect(toastAdd).toHaveBeenCalledWith(
			expect.objectContaining({
				id: 'article-unpublish-failed-3',
				color: 'error',
				icon: 'i-lucide-circle-x',
				title: "Couldn't unpublish",
				description: "The server didn't respond. Nothing changed.",
				duration: 0,
			}),
		)

		const call = toastAdd.mock.calls.find(([arg]) => arg.id === 'article-unpublish-failed-3')
		expect(patchCall).toHaveBeenCalledTimes(1)
		call?.[0].actions[0].onClick()
		await flushPromises()
		expect(patchCall).toHaveBeenCalledTimes(2)
	})
})

describe('Row vanished, draft row — a 404 on publish or delete removes the row and shows an info toast', () => {
	it('removes the row on a 404 publish response', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/2/publish?format=html': () => mockResponse(404),
		})

		await openRowMenu(wrapper, 'Choosing lime plaster for old stone walls')
		await chooseMenuItem('Publish')
		await flushPromises()

		expect(wrapper.text()).not.toContain('Choosing lime plaster for old stone walls')
		expect(wrapper.text()).toContain('All 5')
		expect(wrapper.text()).toContain('Online 4')
		expect(wrapper.text()).toContain('Drafts 1')
		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-not-found-2',
			color: 'info',
			icon: 'i-lucide-info',
			title: 'That article no longer exists',
			description: 'It was deleted somewhere else, so we removed it from the list.',
		})
	})

	it('removes the row when the delete confirmation resolves 404', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'DELETE /v1/article/2': () => mockResponse(404),
		})

		await openRowMenu(wrapper, 'Choosing lime plaster for old stone walls')
		await chooseMenuItem('Delete…')
		await flushPromises()

		const props = overlayMock.getProps() as { action: () => Promise<void> }
		await props.action()

		expect(wrapper.text()).not.toContain('Choosing lime plaster for old stone walls')
		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-not-found-2',
			color: 'info',
			icon: 'i-lucide-info',
			title: 'That article no longer exists',
			description: 'It was deleted somewhere else, so we removed it from the list.',
		})
	})
})

describe('Row vanished, online row — a 404 on unpublish removes the row and shows an info toast', () => {
	it('removes the row and updates the tab counts', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'PATCH /v1/article/3/unpublish?format=html': () => mockResponse(404),
		})

		await openRowMenu(wrapper, 'Before and after: the Rue Verte kitchen')
		await chooseMenuItem('Unpublish')
		await flushPromises()

		expect(wrapper.text()).not.toContain('Before and after: the Rue Verte kitchen')
		expect(wrapper.text()).toContain('All 5')
		expect(wrapper.text()).toContain('Online 3')
		expect(wrapper.text()).toContain('Drafts 2')
		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-not-found-3',
			color: 'info',
			icon: 'i-lucide-info',
			title: 'That article no longer exists',
			description: 'It was deleted somewhere else, so we removed it from the list.',
		})
	})
})

describe('Delete confirm — opens the dialog with the row title and image count', () => {
	it('opens ConfirmDialog with the title and 3 images', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Delete…')

		const props = overlayMock.getProps() as Record<string, unknown>
		expect(props.title).toBe('Delete this article?')
		expect(props.description).toBe(
			'"Winter checklist for timber windows" will be deleted. Its images stay in your library. This can\'t be undone.',
		)
		expect(props.confirmLabel).toBe('Delete article')
		expect(props.cancelLabel).toBe('Cancel')
		expect(props.pendingLabel).toBe('Deleting…')
		expect(props.tone).toBe('danger')
	})
})

describe('Deleted — a 204 closes the dialog, removes the row, and moves focus to the next row', () => {
	it('removes the row, recomputes tabs and raises the success toast', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'DELETE /v1/article/4': () => mockResponse(204),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Delete…')

		const props = overlayMock.getProps() as { action: () => Promise<void> }
		await props.action()
		overlayMock.resolveOpen(true)
		await flushPromises()

		expect(wrapper.text()).not.toContain('Winter checklist for timber windows')
		expect(wrapper.text()).toContain('All 5')
		expect(wrapper.text()).toContain('Online 4')
		expect(wrapper.text()).toContain('Drafts 1')
		expect(toastAdd).toHaveBeenCalledWith({
			id: 'article-deleted-4',
			color: 'success',
			icon: 'i-lucide-circle-check',
			title: 'Article deleted',
			description: '"Winter checklist for timber windows" is gone.',
		})
	})
})

describe('Delete failed — a 500 keeps the article and rejects with the inline message', () => {
	it('throws the inline error message and leaves the article in the list', async () => {
		const wrapper = await mountArticles({
			'GET /v1/article/?format=html': () => mockResponse(200, sixArticleFixture()),
			'DELETE /v1/article/4': () => mockResponse(500),
		})

		await openRowMenu(wrapper, 'Winter checklist for timber windows')
		await chooseMenuItem('Delete…')

		const props = overlayMock.getProps() as { action: () => Promise<void> }
		await expect(props.action()).rejects.toThrow(
			"Couldn't delete the article, so it's still there. Try again in a moment.",
		)

		expect(wrapper.text()).toContain('Winter checklist for timber windows')
	})
})