package net.pterodactylus.sone.web.pages

import com.google.common.eventbus.*
import freenet.clients.http.*
import freenet.support.*
import freenet.support.api.*
import net.pterodactylus.sone.core.*
import net.pterodactylus.sone.data.*
import net.pterodactylus.sone.freenet.wot.*
import net.pterodactylus.sone.main.*
import net.pterodactylus.sone.test.deepMock
import net.pterodactylus.sone.test.get
import net.pterodactylus.sone.test.mock
import net.pterodactylus.sone.test.whenever
import net.pterodactylus.sone.utils.*
import net.pterodactylus.sone.web.*
import net.pterodactylus.sone.web.page.*
import net.pterodactylus.sone.web.page.FreenetTemplatePage.RedirectException
import net.pterodactylus.util.notify.*
import net.pterodactylus.util.template.*
import net.pterodactylus.util.web.*
import net.pterodactylus.util.web.Method.*
import org.junit.Assert.*
import org.mockito.ArgumentMatchers.*
import org.mockito.ArgumentMatchers.eq
import java.io.*
import java.net.*
import java.nio.charset.*
import kotlin.text.Charsets.UTF_8

/**
 * Base class for web page tests.
 */
open class WebPageTest(pageSupplier: (WebInterface, Loaders, TemplateRenderer) -> SoneTemplatePage = { _, _, _ -> mock() }) {

	val currentSone = mock<Sone>()
	val loaders = mock<Loaders>()
	val templateRenderer = mock<TemplateRenderer>()
	val webInterface = deepMock<WebInterface>()
	val core = webInterface.core
	val eventBus = mock<EventBus>()
	val preferences = Preferences(eventBus)
	val l10n = webInterface.l10n!!
	val sessionManager = mock<SessionManager>()

	open val page by lazy { pageSupplier(webInterface, loaders, templateRenderer) }

	val httpRequest = mock<HTTPRequest>()
	val freenetRequest = mock<FreenetRequest>()

	init {
		whenever(freenetRequest.l10n).thenReturn(l10n)
		whenever(freenetRequest.sessionManager).thenReturn(sessionManager)
		whenever(freenetRequest.uri).thenReturn(mock())
	}

	val soneRequest by lazy { freenetRequest.toSoneRequest(core, webInterface) }
	val templateContext = TemplateContext()
	val toadletContext = deepMock<ToadletContext>()
	val responseContent = ByteArrayOutputStream()
	val response = Response(responseContent)

	private val requestHeaders = mutableMapOf<String, String>()
	private val getRequestParameters = mutableMapOf<String, MutableList<String>>()
	private val postRequestParameters = mutableMapOf<String, ByteArray>()
	private val uploadedFileNames = mutableMapOf<String, String>()
	private val uploadedFileContentTypes = mutableMapOf<String, String>()
	private val uploadedFileResources = mutableMapOf<String, String>()
	private val ownIdentities = mutableSetOf<OwnIdentity>()
	private val allSones = mutableMapOf<String, Sone>()
	private val localSones = mutableMapOf<String, Sone>()
	private val allPosts = mutableMapOf<String, Post>()
	private val allPostReplies = mutableMapOf<String, PostReply>()
	private val perPostReplies = mutableMapOf<String, PostReply>()
	private val allAlbums = mutableMapOf<String, Album>()
	private val allImages = mutableMapOf<String, Image>()
	private val notifications = mutableMapOf<String, Notification>()
	private val translations = mutableMapOf<String, String>()

	init {
		setupCore()
		setupWebInterface()
		setupHttpRequest()
		setupFreenetRequest()
		setupTranslations()
	}

	private fun setupCore() {
		whenever(core.preferences).thenReturn(preferences)
		whenever(core.identityManager.allOwnIdentities).then { ownIdentities }
		whenever(core.sones).then { allSones.values }
		whenever(core.getSone(anyString())).then { allSones[it[0]] }
		whenever(core.localSones).then { localSones.values }
		whenever(core.getLocalSone(anyString())).then { localSones[it[0]] }
		whenever(core.getPost(anyString())).then { allPosts[it[0]] }
		whenever(core.getPostReply(anyString())).then { allPostReplies[it[0]] }
		whenever(core.getReplies(anyString())).then { perPostReplies[it[0]].asList() }
		whenever(core.getAlbum(anyString())).then { allAlbums[it[0]] }
		whenever(core.getImage(anyString())).then { allImages[it[0]] }
		whenever(core.getImage(anyString(), anyBoolean())).then { allImages[it[0]] }
		whenever(core.getTemporaryImage(anyString())).thenReturn(null)
	}

	private fun setupWebInterface() {
		whenever(webInterface.sessionManager).thenReturn(sessionManager)
		whenever(webInterface.getCurrentSoneCreatingSession(eq(toadletContext))).thenReturn(currentSone)
		whenever(webInterface.getCurrentSone(eq(toadletContext), anyBoolean())).thenReturn(currentSone)
		whenever(webInterface.getCurrentSoneWithoutCreatingSession(eq(toadletContext))).thenReturn(currentSone)
		whenever(webInterface.getNotifications(currentSone)).then { notifications.values }
		whenever(webInterface.getNotification(anyString())).then { notifications[it[0]].asOptional() }
	}

	private fun setupHttpRequest() {
		whenever(httpRequest.method).thenReturn("GET")
		whenever(httpRequest.getHeader(anyString())).then { requestHeaders[it.get<String>(0).toLowerCase()] }
		whenever(httpRequest.hasParameters()).then { getRequestParameters.isNotEmpty() }
		whenever(httpRequest.parameterNames).then { getRequestParameters.keys }
		whenever(httpRequest.isParameterSet(anyString())).then { it[0] in getRequestParameters }
		whenever(httpRequest.getParam(anyString())).then { getRequestParameters[it[0]]?.firstOrNull() ?: "" }
		whenever(httpRequest.getParam(anyString(), anyString())).then { getRequestParameters[it[0]]?.firstOrNull() ?: it[1] }
		whenever(httpRequest.getIntParam(anyString())).then { getRequestParameters[it[0]]?.first()?.toIntOrNull() ?: 0 }
		whenever(httpRequest.getIntParam(anyString(), anyInt())).then { getRequestParameters[it[0]]?.first()?.toIntOrNull() ?: it[1] }
		whenever(httpRequest.getLongParam(anyString(), anyLong())).then { getRequestParameters[it[0]]?.first()?.toLongOrNull() ?: it[1] }
		whenever(httpRequest.getMultipleParam(anyString())).then { getRequestParameters[it[0]]?.toTypedArray() ?: emptyArray<String>() }
		whenever(httpRequest.getMultipleIntParam(anyString())).then { getRequestParameters[it[0]]?.map { it.toIntOrNull() ?: 0 } ?: emptyArray<Int>() }
		whenever(httpRequest.isPartSet(anyString())).then { it[0] in postRequestParameters }
		whenever(httpRequest.getPartAsStringFailsafe(anyString(), anyInt())).then { postRequestParameters[it[0]]?.decode()?.take(it[1]) ?: "" }
		whenever(httpRequest.getUploadedFile(anyString())).then {
			it.get<String>(0).takeIf { it in uploadedFileNames }
					?.let { name ->
						UploadedFile(uploadedFileNames[name]!!, uploadedFileContentTypes[name]!!, uploadedFileResources[name]!!)
					}
		}
	}

	private class UploadedFile(private val filename: String, private val contentType: String, private val resourceName: String) : HTTPUploadedFile {
		override fun getFilename() = filename
		override fun getContentType() = contentType
		override fun getData() = javaClass.getResourceAsStream(resourceName).readBytes().let(::SimpleReadOnlyArrayBucket)
	}

	private fun ByteArray.decode(charset: Charset = UTF_8) = String(this, charset)

	private fun setupFreenetRequest() {
		whenever(freenetRequest.method).thenReturn(GET)
		whenever(freenetRequest.httpRequest).thenReturn(httpRequest)
		whenever(freenetRequest.toadletContext).thenReturn(toadletContext)
	}

	private fun setupTranslations() {
		whenever(l10n.getString(anyString())).then { translations[it[0]] ?: it[0] }
	}

	fun setMethod(method: Method) {
		whenever(httpRequest.method).thenReturn(method.name)
		whenever(freenetRequest.method).thenReturn(method)
	}

	fun request(uri: String) {
		whenever(httpRequest.path).thenReturn(uri)
		whenever(freenetRequest.uri).thenReturn(URI(uri))
	}

	fun addHttpRequestHeader(name: String, value: String) {
		requestHeaders[name.toLowerCase()] = value
	}

	fun addHttpRequestParameter(name: String, value: String) {
		getRequestParameters[name] = getRequestParameters.getOrElse(name) { mutableListOf() }.apply { add(value) }
	}

	fun addHttpRequestPart(name: String, value: String) {
		postRequestParameters[name] = value.toByteArray(UTF_8)
	}

	fun unsetCurrentSone() {
		whenever(webInterface.getCurrentSoneCreatingSession(eq(toadletContext))).thenReturn(null)
		whenever(webInterface.getCurrentSone(eq(toadletContext), anyBoolean())).thenReturn(null)
		whenever(webInterface.getCurrentSoneWithoutCreatingSession(eq(toadletContext))).thenReturn(null)
	}

	fun addOwnIdentity(ownIdentity: OwnIdentity) {
		ownIdentities += ownIdentity
	}

	fun addSone(id: String, sone: Sone) {
		allSones[id] = sone
	}

	fun addLocalSone(id: String, localSone: Sone) {
		localSones[id] = localSone
	}

	fun addPost(id: String, post: Post) {
		allPosts[id] = post
	}

	fun addPostReply(id: String, postReply: PostReply) {
		allPostReplies[id] = postReply
		postReply.postId?.also { perPostReplies[it] = postReply }
	}

	fun addAlbum(id: String, album: Album) {
		allAlbums[id] = album
	}

	fun addImage(id: String, image: Image) {
		allImages[id] = image
	}

	fun addTranslation(key: String, value: String) {
		translations[key] = value
	}

	fun addNotification(id: String, notification: Notification) {
		notifications[id] = notification
	}

	fun addTemporaryImage(id: String, temporaryImage: TemporaryImage) {
		whenever(core.getTemporaryImage(id)).thenReturn(temporaryImage)
	}

	fun addUploadedFile(name: String, filename: String, contentType: String, resource: String) {
		uploadedFileNames[name] = filename
		uploadedFileContentTypes[name] = contentType
		uploadedFileResources[name] = resource
	}

	fun verifyNoRedirect(assertions: () -> Unit) {
		var caughtException: Exception? = null
		try {
			page.handleRequest(freenetRequest, templateContext)
		} catch (e: Exception) {
			caughtException = e
		}
		caughtException?.run { throw this } ?: assertions()
	}

	fun verifyRedirect(target: String, assertions: () -> Unit = {}) {
		try {
			page.handleRequest(freenetRequest, templateContext)
			fail()
		} catch (re: RedirectException) {
			if (re.target != target) {
				throw re
			}
			assertions()
		} catch (e: Exception) {
			throw e
		}
	}

}