import { vi } from 'vitest'
import { defineComponent, h, type Component } from 'vue'
import { flushPromises, mount, type VueWrapper } from '@vue/test-utils'
import { createPinia, setActivePinia } from 'pinia'
import { RouterView } from 'vue-router'
import uiPlugin from '@nuxt/ui/vue-plugin'
import UApp from '@nuxt/ui/components/App.vue'
import router from '@/router'
import { ApiError, useApi } from '@/composables/useApi'
import { useSessionStore } from '@/stores/session'
import { DESKTOP_WIDTH, setViewportWidth } from '@/components/__tests__/viewport'
import { accessFor } from '@/test/access'

export interface Call {
	method: string
	path: string
	query: URLSearchParams
	body: Record<string, unknown> | undefined
}

export type Route = unknown | ((call: Call) => unknown | Promise<unknown>)

export const kit: { wrapper: VueWrapper | null; calls: Call[] } = { wrapper: null, calls: [] }

export function failWith(status: number, body?: string): Route {
	return () => {
		throw new ApiError(status, undefined, body)
	}
}

export function deferred<T>() {
	let resolve!: (value: T) => void
	const promise = new Promise<T>((done) => {
		resolve = done
	})
	return { promise, resolve }
}

export const WRITE_FAILS = failWith(500, 'Internal server error')

export function callsTo(method: string, path: string) {
	return kit.calls.filter((call) => call.method === method && call.path === path)
}

interface MountOptions {
	role?: string
	routes: Record<string, Route>
	width?: number
	userId?: number
	root?: Component
}

export async function mountRoute(url: string, options: MountOptions) {
	setViewportWidth(options.width ?? DESKTOP_WIDTH)
	Element.prototype.scrollIntoView = vi.fn()
	setActivePinia(createPinia())
	kit.calls = []
	const session = useSessionStore()
	session.session = {
		verified: true,
		username: 'marta',
		id: options.userId ?? 1,
		email: 'marta@renew.example',
		displayName: 'Marta Alves',
		access: accessFor(options.role ?? 'owner'),
	}
	session.status = 'ready'
	const request = vi.fn(async (path: string, init?: RequestInit) => {
		const [pathname = '', search = ''] = path.split('?')
		const call: Call = {
			method: init?.method ?? 'GET',
			path: pathname,
			query: new URLSearchParams(search),
			body: typeof init?.body === 'string' ? JSON.parse(init.body) : undefined,
		}
		kit.calls.push(call)
		const key = `${call.method} ${pathname}`
		if (!(key in options.routes)) {
			throw new Error(`Unexpected request: ${key}`)
		}
		const route = options.routes[key]
		return typeof route === 'function' ? route(call) : structuredClone(route)
	})
	vi.mocked(useApi).mockReturnValue({
		getMe: vi.fn().mockResolvedValue({ verified: true, username: 'marta', id: 1 }),
		request,
		requestPaged: vi.fn(),
	} as unknown as ReturnType<typeof useApi>)
	await router.push(url)
	const root =
		options.root ??
		defineComponent({ render: () => h(UApp, null, { default: () => h(RouterView) }) })
	kit.wrapper = mount(root, { attachTo: document.body, global: { plugins: [router, uiPlugin] } })
	await settle()
}

export async function settle() {
	for (let round = 0; round < 6; round++) {
		await flushPromises()
	}
}

export async function unmountRoute() {
	kit.wrapper?.unmount()
	kit.wrapper = null
	await router.push('/login')
	document.body.innerHTML = ''
}

export function text() {
	return (document.body.textContent ?? '').replace(/\s+/g, ' ').trim()
}

export function dialogBox() {
	return document.body.querySelector<HTMLElement>('[role="dialog"], [role="alertdialog"]')
}

export function dialogText() {
	return (dialogBox()?.textContent ?? '').replace(/\s+/g, ' ').trim()
}

export function control(label: string | RegExp, root: ParentNode = document.body) {
	return Array.from(
		root.querySelectorAll<HTMLElement>('button, [role="menuitem"], a, [role="checkbox"]'),
	).find((element) => {
		const name = (element.getAttribute('aria-label') || element.textContent || '')
			.replace(/\s+/g, ' ')
			.trim()
		return typeof label === 'string' ? name === label : label.test(name)
	})
}

export async function press(label: string | RegExp, root: ParentNode = document.body) {
	const target = control(label, root)
	if (!target) {
		throw new Error(`No control named ${String(label)}`)
	}
	target.click()
	await settle()
}

export async function chooseAction(language: string, item: string) {
	await press(`Actions for ${language}`)
	await press(item)
}

export async function typeInto(element: HTMLInputElement, value: string) {
	element.value = value
	element.dispatchEvent(new Event('input', { bubbles: true }))
	await settle()
}

export function toastText() {
	return (
		document.body.querySelector(
			'[data-slot="viewport"], [role="region"][aria-label*="otification"]',
		)?.textContent ?? ''
	)
}