class Fastlane::CrashlyticsBeta

def api_key_valid?(key)
  key.to_s.length == 40
end

def build_secret_valid?(secret)
  secret.to_s.length == 64
end

def fastfile_template(api_key, build_secret, scheme)
  <<-eos
lane_version "#{Fastlane::VERSION}"
ult_platform :ios
form :ios do
ne :beta do
gym(scheme: '#{scheme}')
crashlytics(api_token: '#{api_key}',
         build_secret: '#{build_secret}',
        notifications: false
        )
d
end

def includes_run_script?(string)
  string.include?('Fabric/run') || string.include?('Crashlytics/run') || string.include?('Fabric.framework/run') || string.include?('Crashlytics.framework/run')
end

def keys_from_project(project)
  require 'xcodeproj'
  target_name = project.default_build_settings(key: 'TARGETNAME')
  path = project.is_workspace ? project.path.gsub('xcworkspace', 'xcodeproj') : project.path
  UI.crash!("No project available at path #{path}") unless File.exist?(path)
  xcode_project = Xcodeproj::Project.open(path)
  target = xcode_project.targets.find { |t| t.name == target_name }
  scripts = target.build_phases.select { |t| t.class == Xcodeproj::Project::Object::PBXShellScriptBuildPhase }
  crash_script = scripts.find { |s| includes_run_script?(s.shell_script) }
  UI.user_error!("Unable to find Crashlytics Run Script Build Phase") if crash_script.nil?
  script_array = crash_script.shell_script.split('\n').find { |l| includes_run_script?(l) }.split(' ')
  if script_array.count == 3 && api_key_valid?(script_array[1]) && build_secret_valid?(script_array[2])
    {
      api_key: script_array[1],
      build_secret: script_array[2]
    }
  else
    UI.important('fastlane was unable to detect your Fabric API Key and Build Secret. 🔑')
    UI.important('Navigate to https://www.fabric.io/settings/organizations, select the appropriate organization,')
    UI.important('and copy the API Key and Build Secret.')
    keys = {}
    loop do
      keys[:api_key] = UI.input('API Key:')
      break if api_key_valid?(keys[:api_key])
      UI.important "Invalid API Key, Please Try Again!"
    end
    loop do
      keys[:build_secret] = UI.input('Build Secret:')
      break if build_secret_valid?(keys[:build_secret])
      UI.important "Invalid Build Secret, Please Try Again!"
    end
    keys
  end
end

def lane_template(api_key, build_secret, scheme)
  %{
ne :beta do
gym(scheme: '#{scheme}')
crashlytics(api_token: '#{api_key}',
         build_secret: '#{build_secret}',
        notifications: false
          )
d
  }
end

def run
  UI.user_error!('Beta by Crashlytics configuration is currently only available for iOS projects.') unless Setup.new.is_ios?
  config = {}
  FastlaneCore::Project.detect_projects(config)
  project = FastlaneCore::Project.new(config)
  keys = keys_from_project(project)
  if FastlaneFolder.setup?
    UI.header('Copy and paste the following lane into your Fastfile to use Crashlytics Beta!')
    puts lane_template(keys[:api_key], keys[:build_secret], project.schemes.first).cyan
  else
    fastfile = fastfile_template(keys[:api_key], keys[:build_secret], project.schemes.first)
    FileUtils.mkdir_p('fastlane')
    File.write('fastlane/Fastfile', fastfile)
    UI.success('A Fastfile has been generated for you at ./fastlane/Fastfile 🚀')
  end
  UI.header('Next Steps')
  UI.success('Run `fastlane beta` to build and upload to Beta by Crashlytics. 🎯')
  UI.success('After submitting your beta, visit https://fabric.io/_/beta to add release notes and notify testers.')
  UI.success('You can edit your Fastfile to distribute and notify testers automatically.')
  UI.success('Learn more here: https://github.com/fastlane/setups/blob/master/samples-ios/distribute-beta-build.md 🚀')
end