class Kamal::Configuration::Env

def self.from_config(config:, secrets_file: nil)
  secrets_keys = config.fetch("secret", [])
  clear = config.fetch("clear", config.key?("secret") ? {} : config)
  new clear: clear, secrets_keys: secrets_keys, secrets_file: secrets_file
end

def args
  [ "--env-file", secrets_file, *argumentize("--env", clear) ]
end

def initialize(clear:, secrets_keys:, secrets_file:)
  @clear = clear
  @secrets_keys = secrets_keys
  @secrets_file = secrets_file
end

def merge(other)
  self.class.new \
    clear: @clear.merge(other.clear),
    secrets_keys: @secrets_keys | other.secrets_keys,
    secrets_file: secrets_file
end

def secrets
  @secrets ||= secrets_keys.to_h { |key| [ key, ENV.fetch(key) ] }
end

def secrets_directory
  File.dirname(secrets_file)
end

def secrets_io
  StringIO.new(Kamal::EnvFile.new(secrets).to_s)
end