require 'rubygems'
require 'rake' # for adding ext() method to string

class FileFinder

  constructor :configurator, :file_finder_helper, :cacheinator, :file_path_utils, :file_wrapper, :yaml_wrapper

  def prepare_search_sources
    @all_test_source_and_header_file_collection = 
      @configurator.collection_all_tests +
      @configurator.collection_all_source + 
      @configurator.collection_all_headers
  end


  def find_header_file(mock_file)
    header = File.basename(mock_file).sub(/#{@configurator.cmock_mock_prefix}/, '').ext(@configurator.extension_header)

    found_path = @file_finder_helper.find_file_in_collection(header, @configurator.collection_all_headers, :error)

    return found_path
  end


  def find_header_input_for_mock_file(mock_file)
    found_path = find_header_file(mock_file)
    mock_input = found_path
    
    if (@configurator.project_use_test_preprocessor)
      mock_input = @cacheinator.diff_cached_test_file( @file_path_utils.form_preprocessed_file_filepath( found_path ) )
    end
    
    return mock_input
  end
  

  def find_source_from_test(test, complain)
    test_prefix  = @configurator.project_test_file_prefix
    source_paths = @configurator.collection_all_source
    
    source = File.basename(test).sub(/#{test_prefix}/, '')

    # we don't blow up if a test file has no corresponding source file
    return @file_finder_helper.find_file_in_collection(source, source_paths, complain)
  end


  def find_test_from_runner_path(runner_path)
    extension_source = @configurator.extension_source

    test_file = File.basename(runner_path).sub(/#{@configurator.test_runner_file_suffix}#{'\\'+extension_source}/, extension_source)
    
    found_path = @file_finder_helper.find_file_in_collection(test_file, @configurator.collection_all_tests, :error)

    return found_path
  end

  
  def find_test_input_for_runner_file(runner_path)
    found_path   = find_test_from_runner_path(runner_path)
    runner_input = found_path
    
    if (@configurator.project_use_test_preprocessor)
      runner_input = @cacheinator.diff_cached_test_file( @file_path_utils.form_preprocessed_file_filepath( found_path ) )
    end
    
    return runner_input
  end
  

  def find_test_from_file_path(file_path)
    test_file = File.basename(file_path).ext(@configurator.extension_source)
    
    found_path = @file_finder_helper.find_file_in_collection(test_file, @configurator.collection_all_tests, :error)
    
    return found_path    
  end


  def find_test_or_source_or_header_file(file_path)
    file = File.basename(file_path)
    return @file_finder_helper.find_file_in_collection(file, @all_test_source_and_header_file_collection, :error)
  end
  
  
  def find_compilation_input_file(file_path, complain=:error)
    found_file = nil
    
    source_file = File.basename(file_path).ext(@configurator.extension_source)

    # We only collect files that already exist when we start up.
    # FileLists can produce undesired results for dynamically generated files depending on when they're accessed.
    # So collect mocks and runners separately and right now.
    if (source_file =~ /#{@configurator.test_runner_file_suffix}/)
      found_file = 
        @file_finder_helper.find_file_in_collection(
          source_file,
          @file_wrapper.directory_listing( File.join(@configurator.project_test_runners_path, '*') ),
          complain)
          
    elsif (@configurator.project_use_mocks and (source_file =~ /#{@configurator.cmock_mock_prefix}/))
      found_file = 
        @file_finder_helper.find_file_in_collection(
          source_file,
          @file_wrapper.directory_listing( File.join(@configurator.cmock_mock_path, '*') ),
          complain)

    else
      found_file = 
        @file_finder_helper.find_file_in_collection(
          source_file,
          @configurator.collection_all_existing_compilation_input,
          complain)
    end

    return found_file
  end

  
  def find_source_file(file_path, complain)
    source_file = File.basename(file_path).ext(@configurator.extension_source)
    return @file_finder_helper.find_file_in_collection(source_file, @configurator.collection_all_source, complain)
  end

  
  def find_assembly_file(file_path)
    assembly_file = File.basename(file_path).ext(@configurator.extension_assembly)
    return @file_finder_helper.find_file_in_collection(assembly_file, @configurator.collection_all_assembly, :error)
  end
    
end