package suwayomi.tachidesk.manga.controller

import io.javalin.http.HttpCode
import suwayomi.tachidesk.manga.impl.backup.AbstractBackupValidator
import suwayomi.tachidesk.manga.impl.backup.BackupFlags
import suwayomi.tachidesk.manga.impl.backup.proto.ProtoBackupExport
import suwayomi.tachidesk.manga.impl.backup.proto.ProtoBackupImport
import suwayomi.tachidesk.manga.impl.backup.proto.ProtoBackupValidator
import suwayomi.tachidesk.server.JavalinSetup.future
import suwayomi.tachidesk.server.util.handler
import suwayomi.tachidesk.server.util.withOperation
import java.text.SimpleDateFormat
import java.util.Date

/*
 * 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 BackupController {

    /** expects a Tachiyomi protobuf backup in the body */
    val protobufImport = handler(
        documentWith = {
            withOperation {
                summary("Restore a backup")
                description("Expects a Tachiyomi protobuf backup in the body")
            }
        },
        behaviorOf = { ctx ->
            ctx.future(
                future {
                    ProtoBackupImport.performRestore(ctx.bodyAsInputStream())
                }
            )
        },
        withResults = {
            httpCode(HttpCode.OK)
        }
    )

    /** expects a Tachiyomi protobuf backup as a file upload, the file must be named "backup.proto.gz" */
    val protobufImportFile = handler(
        documentWith = {
            withOperation {
                summary("Restore a backup file")
                description("Expects a Tachiyomi protobuf backup as a file upload, the file must be named \"backup.proto.gz\"")
            }
            uploadedFile("backup.proto.gz") {
                it.description("Protobuf backup")
                it.required(true)
            }
        },
        behaviorOf = { ctx ->
            // TODO: rewrite this with ctx.uploadedFiles(), don't call the multipart field "backup.proto.gz"
            ctx.future(
                future {
                    ProtoBackupImport.performRestore(ctx.uploadedFile("backup.proto.gz")!!.content)
                }
            )
        },
        withResults = {
            httpCode(HttpCode.OK)
            httpCode(HttpCode.NOT_FOUND)
        }
    )

    /** returns a Tachiyomi protobuf backup created from the current database as a body */
    val protobufExport = handler(
        documentWith = {
            withOperation {
                summary("Create a backup")
                description("Returns a Tachiyomi protobuf backup created from the current database as a body")
            }
        },
        behaviorOf = { ctx ->
            ctx.contentType("application/octet-stream")
            ctx.future(
                future {
                    ProtoBackupExport.createBackup(
                        BackupFlags(
                            includeManga = true,
                            includeCategories = true,
                            includeChapters = true,
                            includeTracking = true,
                            includeHistory = true,
                        )
                    )
                }
            )
        },
        withResults = {
            mime(HttpCode.OK, "application/octet-stream")
        }
    )

    /** returns a Tachiyomi protobuf backup created from the current database as a file */
    val protobufExportFile = handler(
        documentWith = {
            withOperation {
                summary("Create a backup file")
                description("Returns a Tachiyomi protobuf backup created from the current database as a file")
            }
        },
        behaviorOf = { ctx ->
            ctx.contentType("application/octet-stream")
            val currentDate = SimpleDateFormat("yyyy-MM-dd_HH-mm").format(Date())

            ctx.header("Content-Disposition", """attachment; filename="tachidesk_$currentDate.proto.gz"""")
            ctx.future(
                future {
                    ProtoBackupExport.createBackup(
                        BackupFlags(
                            includeManga = true,
                            includeCategories = true,
                            includeChapters = true,
                            includeTracking = true,
                            includeHistory = true,
                        )
                    )
                }
            )
        },
        withResults = {
            mime(HttpCode.OK, "application/octet-stream")
        }
    )

    /** Reports missing sources and trackers, expects a Tachiyomi protobuf backup in the body */
    val protobufValidate = handler(
        documentWith = {
            withOperation {
                summary("Validate a backup")
                description("Reports missing sources and trackers, expects a Tachiyomi protobuf backup in the body")
            }
            body<ByteArray>("") {
            }
        },
        behaviorOf = { ctx ->
            ctx.future(
                future {
                    ProtoBackupValidator.validate(ctx.bodyAsInputStream())
                }
            )
        },
        withResults = {
            json<AbstractBackupValidator.ValidationResult>(HttpCode.OK)
        }
    )

    /** Reports missing sources and trackers, expects a Tachiyomi protobuf backup as a file upload, the file must be named "backup.proto.gz" */
    val protobufValidateFile = handler(
        documentWith = {
            withOperation {
                summary("Validate a backup file")
                description("Reports missing sources and trackers, expects a Tachiyomi protobuf backup as a file upload, the file must be named \"backup.proto.gz\"")
            }
            uploadedFile("backup.proto.gz") {
                it.description("Protobuf backup")
                it.required(true)
            }
        },
        behaviorOf = { ctx ->
            ctx.future(
                future {
                    ProtoBackupValidator.validate(ctx.uploadedFile("backup.proto.gz")!!.content)
                }
            )
        },
        withResults = {
            json<AbstractBackupValidator.ValidationResult>(HttpCode.OK)
        }
    )
}