package xyz.driver.pdsuidomain.services.rest

import scala.concurrent.{ExecutionContext, Future}
import akka.NotUsed
import akka.stream.scaladsl.Source
import akka.util.ByteString
import akka.http.scaladsl.marshalling.Marshal
import akka.http.scaladsl.model._
import akka.stream.Materializer
import xyz.driver.core.rest.{Pagination => _, _}
import xyz.driver.pdsuicommon.db._
import xyz.driver.pdsuicommon.domain._
import xyz.driver.pdsuidomain.entities._
import xyz.driver.pdsuidomain.entities.export.trial.ExportTrialWithLabels
import xyz.driver.pdsuidomain.services.TrialService
import spray.json.DefaultJsonProtocol._
import xyz.driver.entities.patient.CancerType
import xyz.driver.entities.users.AuthUserInfo
import xyz.driver.pdsuidomain.ListResponse
import xyz.driver.pdsuidomain.formats.json.export._

class RestTrialService(transport: ServiceTransport, baseUri: Uri)(implicit protected val materializer: Materializer,
                                                                  protected val exec: ExecutionContext)
    extends TrialService with RestHelper {

  import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport._
  import xyz.driver.pdsuidomain.formats.json.listresponse._
  import xyz.driver.pdsuidomain.formats.json.trial._
  import xyz.driver.pdsuidomain.services.TrialService._

  def getById(id: StringId[Trial])(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[GetByIdReply] = {
    val request = HttpRequest(HttpMethods.GET, endpointUri(baseUri, s"/v1/trial/$id"))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[Trial](response)
    } yield {
      GetByIdReply.Entity(reply)
    }
  }

  def getTrialWithLabels(trialId: StringId[Trial], cancerType: CancerType)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[GetTrialWithLabelsReply] = {
    val request = HttpRequest(HttpMethods.GET, endpointUri(baseUri, s"/v1/export/trial/$cancerType/$trialId"))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[ExportTrialWithLabels](response)
    } yield {
      GetTrialWithLabelsReply.Entity(reply)
    }
  }

  def getTrialsWithLabels(cancerType: CancerType)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[GetTrialsWithLabelsReply] = {
    val request = HttpRequest(HttpMethods.GET, endpointUri(baseUri, s"/v1/export/trial/$cancerType"))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[Seq[ExportTrialWithLabels]](response)
    } yield {
      GetTrialsWithLabelsReply.EntityList(reply)
    }
  }

  def getPdfSource(trialId: StringId[Trial])(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]
  ): Future[Source[ByteString, NotUsed]] = {
    val request = HttpRequest(HttpMethods.GET, endpointUri(baseUri, s"/v1/trial/$trialId/source"))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[HttpEntity](response)
    } yield {
      reply.dataBytes.mapMaterializedValue(_ => NotUsed)
    }
  }

  def getAll(filter: SearchFilterExpr = SearchFilterExpr.Empty,
             sorting: Option[Sorting] = None,
             pagination: Option[Pagination] = None)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[GetListReply] = {
    val request = HttpRequest(
      HttpMethods.GET,
      endpointUri(baseUri, "/v1/trial", filterQuery(filter) ++ sortingQuery(sorting) ++ paginationQuery(pagination)))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[ListResponse[Trial]](response)
    } yield {
      GetListReply.EntityList(reply.items, reply.meta.itemsCount, reply.meta.lastUpdate)
    }
  }

  def update(origTrial: Trial, draftTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] = {
    val id = origTrial.id.id
    for {
      entity <- Marshal(draftTrial).to[RequestEntity]
      request = HttpRequest(HttpMethods.PATCH, endpointUri(baseUri, s"/v1/trial/$id")).withEntity(entity)
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[Trial](response)
    } yield {
      UpdateReply.Updated(reply)
    }
  }

  private def singleAction(origTrial: Trial, action: String, comment: Option[String] = None)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] = {

    val query = comment match {
      case Some(s) => Seq("comment" -> s)
      case None    => Seq.empty[(String, String)]
    }

    val id      = origTrial.id.id
    val request = HttpRequest(HttpMethods.POST, endpointUri(baseUri, s"/v1/trial/$id/$action", query))
    for {
      response <- transport.sendRequestGetResponse(requestContext)(request)
      reply    <- apiResponse[Trial](response)
    } yield {
      UpdateReply.Updated(reply)
    }
  }

  def start(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "start")

  def submit(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "submit")

  def restart(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "restart")

  def flag(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "flag")

  def resolve(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "resolve")

  def archive(origTrial: Trial, comment: Option[String])(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "archive", comment)

  def unassign(origTrial: Trial)(
          implicit requestContext: AuthorizedServiceRequestContext[AuthUserInfo]): Future[UpdateReply] =
    singleAction(origTrial, "unassign")
}