if ENV['COVERAGE']
  require 'pathname'
  require 'simplecov'
  SimpleCov.start do
    add_group 'Vendors', 'lib/vendorificator/vendor'
    root Pathname.new(__FILE__).dirname.dirname.dirname.realpath.to_s
    use_merging
  end
  SimpleCov.command_name "vendor##{$$}@#{DateTime.now.to_s}"
end

require 'thor'
require 'vendorificator'

module Vendorificator
  class CLI < Thor
    VERBOSITY_LEVELS = {1 => :quiet, 2 => :default, 3 => :chatty, 9 => :debug}
    attr_reader :environment, :verbosity

    check_unknown_options! :except => [:git, :diff, :log]
    stop_on_unknown_option! :git, :diff, :log

    default_task :help

    class_option :file, :aliases => '-f', :type => :string, :banner => 'PATH'
    class_option :modules, :aliases => '-m', :type => :string,  :default => '',
      :banner => 'mod1,mod2,...,modN',
      :desc => 'Run only for specified modules (name or path, comma separated)'
    class_option :version,                   :type => :boolean
    class_option :verbose, :aliases => '-v', :type => :numeric

    def initialize(args = [], options = {}, config = {})
      super
      parse_options

      if verbosity >= 9
        MiniGit.debug = true
      end

      if self.options[:version]
        say "Vendorificator #{Vendorificator::VERSION}"
        exit
      end

      @environment = Vendorificator::Environment.new(
        shell,
        VERBOSITY_LEVELS[verbosity] || :default,
        self.options[:file]
      )

      class << shell
        # Make say_status always say it.
        def quiet?
          false
        end
      end
    end

    desc :sync, "Download new or updated vendor files"
    method_option :update, :type => :boolean, :default => false
    def sync
      say_status 'DEPRECATED', 'Using vendor sync is deprecated and will be removed in future versions. Use vendor install or vendor update instead.', :yellow
      environment.sync options.merge(:segments => modules)
    rescue DirtyRepoError
      fail! 'Repository is not clean.'
    rescue MissingVendorfileError
      fail! "Vendorfile not found. Vendorificator needs to run in the directory containing Vendorfile or config/vendor.rb."
    end

    desc :install, "Download and install new or updated vendor files"
    def install(*modules)
      environment.sync options.merge(:segments => modules)
    rescue DirtyRepoError
      fail! 'Repository is not clean.'
    end

    desc :update, "Update installed vendor files"
    def update(*modules)
      environment.sync options.merge(:segments => modules, :update => true)
    rescue DirtyRepoError
      fail! 'Repository is not clean.'
    end

    desc "status", "List known vendor modules and their status"
    method_option :update, :type => :boolean, :default => false
    def status
      environment.config[:use_upstream_version] = options[:update]
      environment.load_vendorfile

      say_status 'DEPRECATED', 'Using vendor status is deprecated and will be removed in future versions', :yellow
      say_status 'WARNING', 'Git repository is not clean', :red unless environment.clean?

      environment.each_segment(*modules) do |mod|
        status_line = mod.to_s

        updatable = mod.updatable?
        if updatable
          if updatable == true
            status_line << ' (updatable)'
          else
            status_line << " (updatable to #{updatable.name})"
          end
        end

        say_status( mod.status.to_s.gsub('_', ' '), status_line,
                    ( mod.status == :up_to_date ? :green : :yellow ) )
      end
    rescue MissingVendorfileError
      fail! "Vendorfile not found. Vendorificator needs to run in the directory containing Vendorfile or config/vendor.rb."
    end

    desc 'info MODULE', "Show module information"
    def info(mod_name)
      environment.info mod_name, options
    rescue MissingVendorfileError
      fail! "Vendorfile not found. Vendorificator needs to run in the directory containing Vendorfile or config/vendor.rb."
    end

    desc :list, 'List all currently installed modules'
    def list
      environment.list
    end

    desc :outdated, 'List all currently installed modules'
    def outdated
      environment.outdated
    end

    desc :pull, "Pull upstream branches from a remote repository"
    method_option :remote, :aliases => ['-r'], :default => nil
    method_option :dry_run, :aliases => ['-n'], :default => false, :type => :boolean
    def pull
      environment.pull_all options
    rescue DirtyRepoError
      fail! 'Repository is not clean.'
    rescue MissingVendorfileError
      fail! "Vendorfile not found. Vendorificator needs to run in the directory containing Vendorfile or config/vendor.rb."
    end

    desc :push, "Push local changes back to the remote repository"
    method_option :remote, :aliases => ['-r'], :default => nil
    def push
      environment.push options
    rescue DirtyRepoError
      fail! 'Repository is not clean.'
    rescue MissingVendorfileError
      fail! "Vendorfile not found. Vendorificator needs to run in the directory containing Vendorfile or config/vendor.rb."
    end

    desc "git GIT_COMMAND [MODULE [MODULE ...]] [-- GIT_OPTIONS]",
         "Run a git command for specified module(s)"
    long_desc <<EOF
  Run a git command for specified modules. Within GIT_ARGS arguments,
  you can use @MERGED@ and @PATH@ tags, which will be substituted with
  module's most recently merged revision and full path of its work
  directory.

  The 'diff' and 'log' commands are simple aliases for 'git' command.

  Examples:
    vendor git log my_module -- @MERGED@..HEAD -- @PATH@    # basic 'vendor log'
    vendor git diff module1 module2 -- --stat @MERGED@ -- @PATH@  # 'vendor diff', as diffstat
EOF
    def git(command, *args)
      modules, git_options = split_git_options(args)
      environment.each_segment(*modules) do |mod|
        unless mod.merged
          say_status 'unmerged', mod.to_s, :red
          next
        end

        actual_args = git_options.dup.map do |arg|
          arg.
            gsub('@MERGED@', mod.merged).
            gsub('@PATH@', mod.work_dir)
        end

        say_status command, mod.to_s
        output = environment.git.git(command, *actual_args)
      end
    end

    desc "diff [MODULE [MODULE ...]] [-- GIT_OPTIONS]",
         "Show differences between work tree and upstream module(s)"
    def diff(*args)
      modules, git_options = split_git_options(args)
      invoke :git, %w'diff' + modules + %w'--' + git_options + %w'@MERGED@ -- @PATH@'
    end

    desc "log [MODULE [MODULE ...]] [-- GIT_OPTIONS]",
         "Show git log of commits added to upstream module(s)"
    def log(*args)
      modules, git_options = split_git_options(args)
      invoke :git, %w'log' + modules + %w'--' + git_options + %w'@MERGED@..HEAD -- @PATH@'
    end

    desc :pry, 'Pry into the binding', :hide => true
    def pry
      require 'pry'
      binding.pry
    end

    def self.start(*args)
      # Make --git-options always quoted
      if i = ARGV.index('--git-options')
        ARGV[i+1,0] = '--'
      end

      if ENV['FIXTURES_DIR']
        require 'vcr'
        VCR.configure do |c|
          c.cassette_library_dir = File.join(ENV['FIXTURES_DIR'], 'vcr')
          c.default_cassette_options = { :record => :new_episodes }
          c.hook_into :webmock
        end
        VCR.use_cassette(ENV['VCR_CASSETTE'] || 'vendorificator') do
          super(*args)
        end
      else
        super(*args)
      end
    end

    private

    # Private: Parses general vendorificator options.
    #
    # Returns nothing.
    def parse_options
      if options[:version]
        say "Vendorificator #{Vendorificator::VERSION}"
        exit
      end

      # figure out verbosity
      @verbosity = self.options[:verbose].to_i
      @verbosity = 2 if @verbosity.zero?
      @verbosity = VERBOSITY_LEVELS.keys.select { |i| i < verbosity }.max unless VERBOSITY_LEVELS[@verbosity]
    end

    def split_git_options(args)
      case i = args.index('--')
      when nil then [args, []]
      when 0 then [[], args[1..-1]]
      else [args[0..(i - 1)], args[(i + 1)..-1]]
      end
    end

    def modules
      say_status 'DEPRECATED', 'Using --modules option is deprecated and will be removed in future versions.', :yellow unless options[:modules].empty?
      options[:modules].split(',').map(&:strip)
    end

    def fail!(message, exception_message = 'I give up.')
      say_status('FATAL', message, :red)
      raise Thor::Error, exception_message
    end

  end
end