/*

 * Geekttrss is a RSS feed reader application on the Android Platform.

 *

 *

 * This file is part of Geekttrss.

 *

 * Geekttrss is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Geekttrss is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with Geekttrss.  If not, see <http://www.gnu.org/licenses/>.

 */

@file:OptIn(ExperimentalSerializationApi::class)

package com.geekorum.ttrss.webapi.model

import androidx.annotation.Keep

import kotlinx.serialization.ExperimentalSerializationApi

import kotlinx.serialization.KSerializer

import kotlinx.serialization.SerialName

import kotlinx.serialization.Serializable

import kotlinx.serialization.Serializer

import kotlinx.serialization.builtins.nullable

import kotlinx.serialization.builtins.serializer

import kotlinx.serialization.encoding.CompositeDecoder

import kotlinx.serialization.encoding.Decoder

import kotlinx.serialization.encoding.Encoder

/**

 * The payload gor a getHeadlines request.

 *

 * It allows to retrieve articles from the Tiny Tiny Rss server.

 */

@Keep

@Serializable

data class GetArticlesRequestPayload(

    @SerialName("feed_id")

    val feedId: Long,

    @SerialName("view_mode")

    val viewMode: ViewMode = ViewMode.ALL_ARTICLES,

    @SerialName("show_content")

    val showContent: Boolean = true,

    @SerialName("show_excerpt")

    val showExcerpt: Boolean = true,

    @SerialName("include_attachments")

    val includeAttachments: Boolean = false,

    private val skip: Int = 0,

    @SerialName("since_id")

    val sinceId: Long = 0,

    val limit: Int = 200,

    @SerialName("order_by")

    val orderBy: SortOrder = SortOrder.NOTHING

) : LoggedRequestPayload() {

    @SerialName("op")

    override val operation = "getHeadlines"

    @Serializable

    enum class ViewMode {

        @SerialName("all_articles")

        ALL_ARTICLES,

        @SerialName("unread")

        UNREAD,

        @SerialName("adaptive")

        ADAPTIVE,

        @SerialName("marked")

        MARKED,

        @SerialName("updated")

        UPDATED

    }

    @Serializable

    enum class SortOrder {

        @SerialName("title")

        TITLE,

        @SerialName("date_reverse")

        DATE_REVERSE,

        @SerialName("feed_dates")

        FEED_DATES,

        @SerialName("")

        NOTHING

    }

}

/**

 * Request payload to update an Article.

 */

@Keep

@Serializable

data class UpdateArticleRequestPayload(

    @SerialName("article_ids")

    val articleIds: String,

    val mode: Int,

    val field: Int,

    val data: String? = null

) : LoggedRequestPayload() {

    @SerialName("op")

    override val operation = "updateArticle"

}

/**

 * The response of an update article request.

 */

@Keep

@Serializable(UpdateArticleResponsePayload.OwnSerializer::class)

data class UpdateArticleResponsePayload(

    @SerialName("seq")

    override val sequence: Int? = null,

    override val status: Int = 0,

    override val content: Content

) : ResponsePayload<UpdateArticleResponsePayload.Content>() {

    @Transient

    val updated: Int = content.updated ?: 0

    @Serializable

    data class Content(

        val status: String? = null,

        val updated: Int? = null,

        override var error: Error? = null

    ): BaseContent()

    @Serializer(UpdateArticleResponsePayload::class)

    internal object OwnSerializer : KSerializer<UpdateArticleResponsePayload> {

        override fun serialize(encoder: Encoder, value: UpdateArticleResponsePayload) {

            TODO("not implemented")

        }

        override fun deserialize(decoder: Decoder): UpdateArticleResponsePayload {

            val contentDecoder = decoder.beginStructure(descriptor)

            lateinit var content: Content

            var seq: Int? = null

            var status = 0

            loop@ while (true) {

                when(val i = contentDecoder.decodeElementIndex(descriptor)) {

                    CompositeDecoder.DECODE_DONE -> break@loop

                    0 -> seq = contentDecoder.decodeNullableSerializableElement(descriptor, i,

                        Int.serializer().nullable)

                    1 -> status = contentDecoder.decodeIntElement(descriptor, i)

                    2 -> {

                        val contentSerializer = Content.serializer()

                        content = contentDecoder.decodeSerializableElement(contentSerializer.descriptor, i,

                            contentSerializer)

                    }

                }

            }

            contentDecoder.endStructure(descriptor)

            return UpdateArticleResponsePayload(

                content = content,

                sequence = seq,

                status = status

            )

        }

    }

}