package suwayomi.tachidesk.manga.controller

import io.javalin.http.HttpCode
import io.javalin.websocket.WsConfig
import kotlinx.coroutines.runBlocking
import mu.KotlinLogging
import org.kodein.di.DI
import org.kodein.di.conf.global
import org.kodein.di.instance
import suwayomi.tachidesk.manga.impl.Category
import suwayomi.tachidesk.manga.impl.CategoryManga
import suwayomi.tachidesk.manga.impl.Chapter
import suwayomi.tachidesk.manga.impl.update.IUpdater
import suwayomi.tachidesk.manga.impl.update.UpdateStatus
import suwayomi.tachidesk.manga.impl.update.UpdaterSocket
import suwayomi.tachidesk.manga.model.dataclass.CategoryDataClass
import suwayomi.tachidesk.manga.model.dataclass.MangaChapterDataClass
import suwayomi.tachidesk.manga.model.dataclass.PaginatedList
import suwayomi.tachidesk.server.JavalinSetup.future
import suwayomi.tachidesk.server.util.formParam
import suwayomi.tachidesk.server.util.handler
import suwayomi.tachidesk.server.util.pathParam
import suwayomi.tachidesk.server.util.withOperation

/*
 * Copyright (C) Contributors to the Suwayomi project
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */

object UpdateController {
    private val logger = KotlinLogging.logger { }

    /** get recently updated manga chapters */
    val recentChapters = handler(
        pathParam<Int>("pageNum"),
        documentWith = {
            withOperation {
                summary("Updates fetch")
                description("Get recently updated manga chapters")
            }
        },
        behaviorOf = { ctx, pageNum ->
            ctx.future(
                future {
                    Chapter.getRecentChapters(pageNum)
                }
            )
        },
        withResults = {
            json<PagedMangaChapterListDataClass>(HttpCode.OK)
        }
    )

    /**
     * Class made for handling return type in the documentation for [recentChapters],
     * since OpenApi cannot handle runtime generics.
     */
    private class PagedMangaChapterListDataClass : PaginatedList<MangaChapterDataClass>(emptyList(), false)

    val categoryUpdate = handler(
        formParam<Int?>("categoryId"),
        documentWith = {
            withOperation {
                summary("Updater start")
                description("Starts the updater")
            }
        },
        behaviorOf = { ctx, categoryId ->
            val categoriesForUpdate = ArrayList<CategoryDataClass>()
            if (categoryId == null) {
                logger.info { "Adding Library to Update Queue" }
                categoriesForUpdate.addAll(Category.getCategoryList())
            } else {
                val category = Category.getCategoryById(categoryId)
                if (category != null) {
                    categoriesForUpdate.add(category)
                } else {
                    logger.info { "No Category found" }
                    ctx.status(HttpCode.BAD_REQUEST)
                    return@handler
                }
            }
            addCategoriesToUpdateQueue(categoriesForUpdate, true)
            ctx.status(HttpCode.OK)
        },
        withResults = {
            httpCode(HttpCode.OK)
            httpCode(HttpCode.BAD_REQUEST)
        }
    )

    private fun addCategoriesToUpdateQueue(categories: List<CategoryDataClass>, clear: Boolean = false) {
        val updater by DI.global.instance<IUpdater>()
        if (clear) {
            runBlocking { updater.reset() }
        }
        categories.forEach { category ->
            val mangas = CategoryManga.getCategoryMangaList(category.id)
            mangas.forEach { manga ->
                updater.addMangaToQueue(manga)
            }
        }
    }

    fun categoryUpdateWS(ws: WsConfig) {
        ws.onConnect { ctx ->
            UpdaterSocket.addClient(ctx)
        }
        ws.onMessage { ctx ->
            UpdaterSocket.handleRequest(ctx)
        }
        ws.onClose { ctx ->
            UpdaterSocket.removeClient(ctx)
        }
    }

    val updateSummary = handler(
        documentWith = {
            withOperation {
                summary("Updater summary")
                description("Gets the latest updater summary")
            }
        },
        behaviorOf = { ctx ->
            val updater by DI.global.instance<IUpdater>()
            ctx.json(updater.getStatus().value.getJsonSummary())
        },
        withResults = {
            json<UpdateStatus>(HttpCode.OK)
        }
    )

    val reset = handler(
        documentWith = {
            withOperation {
                summary("Updater reset")
                description("Stops and resets the Updater")
            }
        },
        behaviorOf = { ctx ->
            val updater by DI.global.instance<IUpdater>()
            logger.info { "Resetting Updater" }
            ctx.future(
                future {
                    updater.reset()
                }.thenApply {
                    ctx.status(HttpCode.OK)
                }
            )
        },
        withResults = {
            httpCode(HttpCode.OK)
        }
    )
}