module Snapshot
  class ResetSimulators
    def self.clear_everything!(ios_versions, force = false)
      # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      # !! Warning: This script will remove all your existing simulators !!
      # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

      sure = true if FastlaneCore::Env.truthy?("SNAPSHOT_FORCE_DELETE") || force
      sure = agree("Are you sure? All your simulators will be DELETED and new ones will be created! (y/n)".red, true) unless sure
      UI.user_error!("User cancelled action") unless sure

      devices.each do |device|
        _, name, id = device
        puts "Removing device #{name} (#{id})"
        `xcrun simctl delete #{id}`
      end

      all_runtimes = `xcrun simctl list runtimes`.lines.map { |s| s.slice(/(.*?) \(/, 1) }.compact
      tv_versions = filter_runtimes(all_runtimes, 'tvOS')
      watch_versions = filter_runtimes(all_runtimes, 'watchOS')

      all_device_types = `xcrun simctl list devicetypes`.scan(/(.*)\s\((.*)\)/)
      # == Device Types ==
      # iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s)
      # iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5)
      # iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s)
      # iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6)
      all_device_types.each do |device_type|
        if device_type.join(' ').include?("Watch")
          create(device_type, watch_versions, 'watchOS')
        elsif device_type.join(' ').include?("TV")
          create(device_type, tv_versions, 'tvOS')
        else
          create(device_type, ios_versions)
        end
      end

      make_phone_watch_pair
    end

    def self.create(device_type, os_versions, os_name = 'iOS')
      os_versions.each do |os_version|
        puts "Creating #{device_type} for #{os_name} version #{os_version}"
        `xcrun simctl create '#{device_type[0]}' #{device_type[1]} #{os_version}`
      end
    end

    def self.filter_runtimes(all_runtimes, os = 'iOS')
      all_runtimes.select { |r| r[/^#{os}/] }.map { |r| r.split(' ')[1] }
    end

    def self.devices
      all_devices = Helper.backticks('xcrun simctl list devices', print: $verbose)
      # == Devices ==
      # -- iOS 9.0 --
      #   iPhone 4s (32246EBC-33B0-47F9-B7BB-5C23C550DF29) (Shutdown)
      #   iPhone 5 (4B56C101-6B95-43D1-9485-3FBA0E127FFA) (Shutdown)
      #   iPhone 5s (6379C204-E82A-4FBD-8A22-6A01C7791D62) (Shutdown)
      # -- Unavailable: com.apple.CoreSimulator.SimRuntime.iOS-8-4 --
      #   iPhone 4s (FE9D6F85-1C51-4FE6-8597-FCAB5286B869) (Shutdown) (unavailable, runtime profile not found)

      result = all_devices.lines.map do |line|
        (line.match(/\s+(.+?)\s\(([\w\-]+)\).*/) || []).to_a
      end

      result.select { |parsed| parsed.length == 3 } # we don't care about those headers
    end

    def self.make_phone_watch_pair
      phones = []
      watches = []
      devices.each do |device|
        full_line, name, id = device
        phones << id if name.start_with?('iPhone 6') && device_line_usable?(full_line)
        watches << id if name.end_with?('mm') && device_line_usable?(full_line)
      end

      if phones.any? && watches.any?
        puts "Creating device pair of #{phones.last} and #{watches.last}"
        Helper.backticks("xcrun simctl pair #{watches.last} #{phones.last}", print: $verbose)
      end
    end

    def self.device_line_usable?(line)
      !line.include?("unavailable")
    end
  end
end