import { afterEach, describe, expect, it, vi } from 'vitest'
import { flushPromises } from '@vue/test-utils'
import {
	button,
	callsTo,
	chooseMenuItem,
	click,
	createBackend,
	dialog,
	failWith,
	mountDirectory,
	networkFailure,
	openRowMenu,
	pending,
	rowTexts,
	textOf,
	unmountDirectory,
} from './directoryTestKit'

vi.mock('@/composables/useApi', async (importOriginal) => {
	const actual = await importOriginal<typeof import('@/composables/useApi')>()
	return { ...actual, useApi: vi.fn() }
})

afterEach(unmountDirectory)

async function openDelete(name: string, backend = createBackend()) {
	await mountDirectory('authors', '/authors', { backend })
	await openRowMenu(name)
	await chooseMenuItem('Delete…')
	return backend
}

function box() {
	return dialog()!
}

function trigger() {
	return box().querySelector<HTMLElement>('button[aria-haspopup="listbox"]')!
}

async function openSelect() {
	trigger().click()
	await flushPromises()
}

function optionLabels() {
	return Array.from(box().querySelectorAll('[role="option"]')).map((option) => textOf(option))
}

describe('Authors delete: reassign (recommended)', () => {
	it('explains, preselects the first other author and lists the buttons', async () => {
		const backend = await openDelete('Camille Roche')

		const text = textOf(box())
		expect(box().getAttribute('role')).toBe('alertdialog')
		expect(text).toContain('Delete this author?')
		expect(text).toContain(
			'"Camille Roche" will be deleted and is credited on 3 articles. This can\'t be undone.',
		)
		expect(text).toContain('Credit these articles to')
		expect(textOf(trigger())).toBe('Inès Duarte')
		expect(text).toContain(
			'Where an article has several authors, Camille Roche is removed and the others stay.',
		)
		expect(button('Cancel', box())).toBeTruthy()
		expect(button('Delete and reassign 3 articles', box())).toBeTruthy()
		expect(
			backend.calls.filter((call) => call.raw === '/v1/author/?page=1&size=100'),
		).toHaveLength(1)
	})

	it('adds the linked-account line for a linked author', async () => {
		await openDelete('Inès Duarte')

		expect(textOf(box())).toContain(
			"Linked to ines.duarte@renew.example. The user account isn't affected.",
		)
	})
})

describe('Authors delete: reassign succeeds', () => {
	it('sends one DELETE with reassign_to, reads Reassigning… and toasts', async () => {
		const backend = createBackend()
		const hold = pending<unknown>()
		backend.responders['DELETE /v1/author/7'] = () => hold.promise
		await openDelete('Camille Roche', backend)
		await click('Delete and reassign 3 articles', box())

		expect(button('Reassigning…', box())).toBeTruthy()
		hold.resolve(undefined)
		await flushPromises()

		const deletes = callsTo(backend, 'DELETE', '/v1/author/7')
		expect(deletes).toHaveLength(1)
		expect(deletes[0]!.query.get('reassign_to')).toBe('2')
		expect(rowTexts().join(' ')).not.toContain('Camille Roche')
		expect(document.body.textContent).toContain('Author deleted')
		expect(document.body.textContent).toContain('3 articles now credit Inès Duarte.')
	})
})

describe('Authors delete: choose who', () => {
	it('does not list the deleted author and ends with Nobody', async () => {
		await openDelete('Camille Roche')
		await openSelect()

		const labels = optionLabels()
		expect(labels.some((label) => label.includes('Camille Roche'))).toBe(false)
		expect(labels.at(-1)).toContain('Nobody')
		expect(labels.at(-1)).toContain('Remove the byline')
		expect(labels[0]).toContain('Inès Duarte')
	})
})

describe('Authors delete: nobody', () => {
	it('explains the byline and sends reassign_to=none', async () => {
		const backend = await openDelete('Camille Roche')
		await openSelect()
		Array.from(box().querySelectorAll<HTMLElement>('[role="option"]'))
			.find((option) => textOf(option).includes('Nobody'))!
			.click()
		await flushPromises()

		expect(textOf(box())).toContain(
			'The articles keep any other authors. Articles with only this author will have no byline.',
		)
		await click('Delete and reassign 3 articles', box())

		expect(callsTo(backend, 'DELETE', '/v1/author/7')[0]!.query.get('reassign_to')).toBe('none')
	})
})

describe.each([
	['status 500', failWith(500)],
	['a network error', networkFailure],
])('Authors delete: failed with %s', (_name, responder) => {
	it('keeps the dialog open with the notice and enables the buttons again', async () => {
		const backend = createBackend()
		backend.responders['DELETE /v1/author/7'] = responder
		await openDelete('Camille Roche', backend)
		await click('Delete and reassign 3 articles', box())

		const alert = textOf(box().querySelector('[role="alert"]'))
		expect(alert).toContain("Couldn't delete the author")
		expect(alert).toContain('Nothing was changed. Try again in a moment.')
		expect(button('Cancel', box())!.hasAttribute('disabled')).toBe(false)
		expect(button('Delete and reassign 3 articles', box())!.hasAttribute('disabled')).toBe(
			false,
		)
	})
})

describe('Authors delete: server fallback (409)', () => {
	it('opens the fallback dialog and Reassign articles reopens the reassign dialog', async () => {
		const backend = createBackend()
		backend.responders['DELETE /v1/author/7'] = failWith(409, 'author_has_articles')
		await openDelete('Camille Roche', backend)
		await click('Delete and reassign 3 articles', box())
		await flushPromises()

		const text = textOf(box())
		expect(text).toContain("Can't delete this author")
		expect(text).toContain(
			'"Camille Roche" is credited on 3 articles. Choose another author to credit instead, or remove Camille Roche from those articles first.',
		)
		expect(button('Close', box())).toBeTruthy()
		expect(button('Reassign articles', box())).toBeTruthy()

		await click('Reassign articles', box())
		await flushPromises()

		expect(textOf(box())).toContain('Delete this author?')
	})
})

describe('Authors delete: no articles', () => {
	it('asks a plain confirmation with no select and sends no reassign_to', async () => {
		const backend = await openDelete('Léa Fontaine')

		const text = textOf(box())
		expect(text).toContain('Delete this author?')
		expect(text).toContain(
			'"Léa Fontaine" will be deleted. No articles credit this author. This can\'t be undone.',
		)
		expect(trigger()).toBeNull()
		expect(button('Delete author', box())).toBeTruthy()

		await click('Delete author', box())

		const deletes = callsTo(backend, 'DELETE', '/v1/author/10')
		expect(deletes).toHaveLength(1)
		expect(deletes[0]!.query.has('reassign_to')).toBe(false)
		expect(rowTexts().join(' ')).not.toContain('Léa Fontaine')
	})
})

describe('Authors delete: author already gone', () => {
	it('closes, removes the row and shows the info toast on 404', async () => {
		const backend = createBackend()
		backend.responders['DELETE /v1/author/7'] = failWith(404, 'author_not_found')
		await openDelete('Camille Roche', backend)
		await click('Delete and reassign 3 articles', box())

		expect(dialog()).toBeNull()
		expect(rowTexts().join(' ')).not.toContain('Camille Roche')
		expect(document.body.textContent).toContain('That author no longer exists')
	})
})