/* 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 http://mozilla.org/MPL/2.0/. */

#include "sdp/SdpPref.h"

#include "sdp/RsdparsaSdpParser.h"
#include "sdp/SipccSdpParser.h"

namespace mozilla {

auto SdpPref::Parser() -> Parsers {
  static const auto values = std::unordered_map<std::string, Parsers>{
      {"sipcc", Parsers::Sipcc},
      {"webrtc-sdp", Parsers::WebRtcSdp},
      {DEFAULT, Parsers::Sipcc},
  };
  return Pref(PRIMARY_PREF, values);
}

auto SdpPref::AlternateParseMode() -> AlternateParseModes {
  static const auto values =
      std::unordered_map<std::string, AlternateParseModes>{
          {"parallel", AlternateParseModes::Parallel},
          {"failover", AlternateParseModes::Failover},
          {"never", AlternateParseModes::Never},
          {DEFAULT, AlternateParseModes::Parallel},
      };
  return Pref(ALTERNATE_PREF, values);
}

auto SdpPref::Primary() -> UniquePtr<SdpParser> {
  switch (Parser()) {
    case Parsers::Sipcc:
      return UniquePtr<SdpParser>(new SipccSdpParser());
    case Parsers::WebRtcSdp:
      return UniquePtr<SdpParser>(new RsdparsaSdpParser());
  }
  MOZ_CRASH("ALL Parsers CASES ARE NOT COVERED");
  return nullptr;
}

auto SdpPref::Secondary() -> Maybe<UniquePtr<SdpParser>> {
  if (AlternateParseMode() != AlternateParseModes::Parallel) {
    return Nothing();
  }
  switch (Parser()) {  // Choose whatever the primary parser isn't
    case Parsers::Sipcc:
      return Some(UniquePtr<SdpParser>(new RsdparsaSdpParser()));
    case Parsers::WebRtcSdp:
      return Some(UniquePtr<SdpParser>(new SipccSdpParser()));
  }
  MOZ_CRASH("ALL Parsers CASES ARE NOT COVERED");
  return Nothing();
}

auto SdpPref::Failover() -> Maybe<UniquePtr<SdpParser>> {
  if (AlternateParseMode() != AlternateParseModes::Failover) {
    return Nothing();
  }
  switch (Parser()) {
    case Parsers::Sipcc:
      return Some(UniquePtr<SdpParser>(new RsdparsaSdpParser()));
    case Parsers::WebRtcSdp:
      return Some(UniquePtr<SdpParser>(new SipccSdpParser()));
  }
  MOZ_CRASH("ALL Parsers CASES ARE NOT COVERED");
  return Nothing();
}

auto SdpPref::StrictSuccess() -> bool {
  return Preferences::GetBool(STRICT_SUCCESS_PREF, false);
}

}  // namespace mozilla