import Dependencies
import Foundation
import ShellClient

/// Represents the configuration.
public struct Configuration: Decodable {

  public let playbookDir: String?
  public let inventoryPath: String?
  public let templateRepo: String?
  public let templateRepoVersion: String?
  public let templateDir: String?
  public let defaultPlaybookArgs: String?

  private enum CodingKeys: String, CodingKey {
    case playbookDir = "HPA_PLAYBOOK_DIR"
    case inventoryPath = "HPA_DEFAULT_INVENTORY"
    case templateRepo = "HPA_TEMPLATE_REPO"
    case templateRepoVersion = "HPA_TEMPLATE_VERSION"
    case templateDir = "HPA_TEMPLATE_DIR"
    case defaultPlaybookArgs = "HPA_DEFAULT_PLAYBOOK_ARGS"
  }

  public static func fromEnv(
    _ env: [String: String],
    encoder: JSONEncoder = .init(),
    decoder: JSONDecoder = .init()
  ) throws -> Self {
    @Dependency(\.logger) var logger

    logger.trace("Creating configuration from env...")
    // logger.debug("\(env)")

    let hpaValues = env.reduce(into: [String: String]()) { partial, next in
      if next.key.contains("HPA") {
        partial[next.key] = next.value
      }
    }
    logger.debug("HPA env vars: \(hpaValues)")
    let data = try encoder.encode(env)
    return try decoder.decode(Configuration.self, from: data)
  }
}