// Copyright 2017 The Tulsi Authors. All rights reserved.
//
// 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.

/// Returns the configuration flags required to build a Bazel target and all of its dependencies
/// with the specified PlatformType and AppleCPU.
///
///  - Every platform has the --apple_platform_type flag set
///  - macOS and iOS use the base --cpu flag, while tvOS and watchOS use the  --tvos_cpus and
///    --watchos_cpus respectively
///  - iOS also sets the --watchos_cpus flag (as it can contain a watchOS app embedded)
extension PlatformConfiguration {
  public var bazelFlags: [String] {
    let cpuStr = cpu.rawValue
    var flags = ["--apple_platform_type=\(platform.bazelPlatform)"]

    switch platform {
    case .ios:
      fallthrough
    case .macos:
      flags.append("--cpu=\(platform.bazelCPUPlatform)_\(cpuStr)")
    case .tvos:
      fallthrough
    case .watchos:
      flags.append("--\(platform.bazelCPUPlatform)_cpus=\(cpuStr)")
    }

    if case .ios = platform {
      let watchCPU: CPU = cpu.isARM ? .armv7k : .i386
      flags.append("--\(PlatformType.watchos.bazelCPUPlatform)_cpus=\(watchCPU.rawValue)")
    }

    return flags
  }
}

public class BazelBuildSettingsFeatures {
  public static func enabledFeatures(
      options: TulsiOptionSet,
      workspaceRoot: String,
      bazelExecRoot: String
  ) -> Set<BazelSettingFeature> {
    return [.DirectDebugPrefixMap(bazelExecRoot, workspaceRoot)]
  }
}