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/*
 * Copyright 2021 - 2023 Sporta Technologies PVT LTD & the ZIO HTTP contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package zio.http

import zio.Config
import zio.Config.Secret

sealed trait ClientSSLConfig

object ClientSSLConfig {
  val config: Config[ClientSSLConfig] = {
    val tpe                = Config.string("type")
    val certPath           = Config.string("cert-path")
    val trustStorePath     = Config.string("trust-store-path")
    val trustStorePassword = Config.secret("trust-store-password")

    val default                 = Config.succeed(Default)
    val fromCertFile            = certPath.map(FromCertFile(_))
    val fromCertResource        = certPath.map(FromCertResource(_))
    val fromTrustStoreFile      = trustStorePath.zipWith(trustStorePassword)(FromTrustStoreFile(_, _))
    val fromTrustStoreResource  = trustStorePath.zipWith(trustStorePassword)(FromTrustStoreResource(_, _))
    val fromClientAndServerCert = Config.defer {
      val serverCertConfig = config.nested("cert", "server")
      val clientCertConfig = ClientSSLCertConfig.config.nested("cert", "client")
      serverCertConfig.zipWith(clientCertConfig)(FromClientAndServerCert(_, _))
    }

    tpe.switch(
      "Default"                 -> default,
      "FromCertFile"            -> fromCertFile,
      "FromCertResource"        -> fromCertResource,
      "FromTrustStoreFile"      -> fromTrustStoreFile,
      "FromTrustStoreResource"  -> fromTrustStoreResource,
      "FromClientAndServerCert" -> fromClientAndServerCert,
    )
  }

  case object Default                                                                         extends ClientSSLConfig
  final case class FromCertFile(certPath: String)                                             extends ClientSSLConfig
  final case class FromCertResource(certPath: String)                                         extends ClientSSLConfig
  final case class FromTrustStoreResource(trustStorePath: String, trustStorePassword: Secret) extends ClientSSLConfig
  final case class FromClientAndServerCert(
    serverCertConfig: ClientSSLConfig,
    clientCertConfig: ClientSSLCertConfig,
  ) extends ClientSSLConfig

  object FromTrustStoreResource {
    def apply(trustStorePath: String, trustStorePassword: String): FromTrustStoreResource =
      FromTrustStoreResource(trustStorePath, Secret(trustStorePassword))
  }
  final case class FromTrustStoreFile(trustStorePath: String, trustStorePassword: Secret) extends ClientSSLConfig
  object FromTrustStoreFile     {
    def apply(trustStorePath: String, trustStorePassword: String): FromTrustStoreFile =
      FromTrustStoreFile(trustStorePath, Secret(trustStorePassword))
  }
}