# ==========================================
#   Unity Project - A Test Framework for C
#   Copyright (c) 2007 Mike Karlesky, Mark VanderVoord, Greg Williams
#   [Released under MIT License. Please refer to license.txt for details]
# ==========================================

require 'yaml'
require 'fileutils'
require HERE+'../../auto/unity_test_summary'
require HERE+'../../auto/generate_test_runner'
require HERE+'../../auto/colour_reporter'

module RakefileHelpers

  C_EXTENSION = '.c'

  def load_configuration(config_file)
    unless ($configured)
      $cfg_file = HERE+"../../test/targets/#{config_file}" unless (config_file =~ /[\\|\/]/)
      $cfg = YAML.load(File.read($cfg_file))
      $colour_output = false unless $cfg['colour']
      $configured = true if (config_file != DEFAULT_CONFIG_FILE)
    end
  end

  def configure_clean
    CLEAN.include($cfg['compiler']['build_path'] + '*.*') unless $cfg['compiler']['build_path'].nil?
  end

  def configure_toolchain(config_file=DEFAULT_CONFIG_FILE)
    config_file += '.yml' unless config_file =~ /\.yml$/
    config_file = config_file unless config_file =~ /[\\|\/]/
    load_configuration(config_file)
    configure_clean
  end

  def tackit(strings)
    if strings.is_a?(Array)
      result = "\"#{strings.join}\""
    else
      result = strings
    end
    return result
  end

  def squash(prefix, items)
    result = ''
    items.each { |item| result += " #{prefix}#{tackit(item)}" }
    return result
  end

  def build_compiler_fields
    command  = tackit($cfg['compiler']['path'])
    if $cfg['compiler']['defines']['items'].nil?
      defines  = ''
    else
      defines  = squash($cfg['compiler']['defines']['prefix'], $cfg['compiler']['defines']['items'] + ['UNITY_OUTPUT_CHAR=UnityOutputCharSpy_OutputChar'])
    end
    options  = squash('', $cfg['compiler']['options'])
    includes = squash($cfg['compiler']['includes']['prefix'], $cfg['compiler']['includes']['items'])
    includes = includes.gsub(/\\ /, ' ').gsub(/\\\"/, '"').gsub(/\\$/, '') # Remove trailing slashes (for IAR)
    return {:command => command, :defines => defines, :options => options, :includes => includes}
  end

  def compile(file, defines=[])
    compiler = build_compiler_fields
    unity_include = $cfg['compiler']['includes']['prefix']+'../../src'
    cmd_str = "#{compiler[:command]}#{compiler[:defines]}#{compiler[:options]}#{compiler[:includes]} #{unity_include} #{file} " +
      "#{$cfg['compiler']['object_files']['prefix']}#{$cfg['compiler']['object_files']['destination']}" +
      "#{File.basename(file, C_EXTENSION)}#{$cfg['compiler']['object_files']['extension']}"
    execute(cmd_str)
  end

  def build_linker_fields
    command  = tackit($cfg['linker']['path'])
    if $cfg['linker']['options'].nil?
      options  = ''
    else
      options  = squash('', $cfg['linker']['options'])
    end
    if ($cfg['linker']['includes'].nil? || $cfg['linker']['includes']['items'].nil?)
      includes = ''
    else
      includes = squash($cfg['linker']['includes']['prefix'], $cfg['linker']['includes']['items'])
    end
    includes = includes.gsub(/\\ /, ' ').gsub(/\\\"/, '"').gsub(/\\$/, '') # Remove trailing slashes (for IAR)
    return {:command => command, :options => options, :includes => includes}
  end

  def link_it(exe_name, obj_list)
    linker = build_linker_fields
    cmd_str = "#{linker[:command]}#{linker[:options]}#{linker[:includes]} " +
      (obj_list.map{|obj|"#{$cfg['linker']['object_files']['path']}#{obj} "}).join +
      $cfg['linker']['bin_files']['prefix'] + ' ' +
      $cfg['linker']['bin_files']['destination'] +
      exe_name + $cfg['linker']['bin_files']['extension']
    execute(cmd_str)
  end

  def build_simulator_fields
    return nil if $cfg['simulator'].nil?
    if $cfg['simulator']['path'].nil?
      command = ''
    else
      command = (tackit($cfg['simulator']['path']) + ' ')
    end
    if $cfg['simulator']['pre_support'].nil?
      pre_support = ''
    else
      pre_support = squash('', $cfg['simulator']['pre_support'])
    end
    if $cfg['simulator']['post_support'].nil?
      post_support = ''
    else
      post_support = squash('', $cfg['simulator']['post_support'])
    end
    return {:command => command, :pre_support => pre_support, :post_support => post_support}
  end

  def execute(command_string, verbose=true)
    report command_string
    output = `#{command_string}`.chomp
    report(output) if (verbose && !output.nil? && (output.length > 0))
    if ($?.exitstatus != 0)
      raise "Command failed. (Returned #{$?.exitstatus})"
    end
    return output
  end

  def report_summary
    summary = UnityTestSummary.new
    summary.set_root_path(HERE)
    results_glob = "#{$cfg['compiler']['build_path']}*.test*"
    results_glob.gsub!(/\\/, '/')
    results = Dir[results_glob]
    summary.set_targets(results)
    summary.run
  end

  def run_tests
    report 'Running Unity system tests...'

    # Tack on TEST define for compiling unit tests
    load_configuration($cfg_file)
    test_defines = ['TEST']
    $cfg['compiler']['defines']['items'] = [] if $cfg['compiler']['defines']['items'].nil?

    # Get a list of all source files needed
    src_files  = Dir[HERE+'src/*.c']
    src_files += Dir[HERE+'test/*.c']
    src_files += Dir[HERE+'test/main/*.c']
    src_files << '../../src/unity.c'

    # Build object files
    src_files.each { |f| compile(f, test_defines) }
    obj_list = src_files.map {|f| File.basename(f.ext($cfg['compiler']['object_files']['extension'])) }

    # Link the test executable
    test_base = "framework_test"
    link_it(test_base, obj_list)

    # Execute unit test and generate results file
    simulator = build_simulator_fields
    executable = $cfg['linker']['bin_files']['destination'] + test_base + $cfg['linker']['bin_files']['extension']
    if simulator.nil?
      cmd_str = executable + " -v -r"
    else
      cmd_str = "#{simulator[:command]} #{simulator[:pre_support]} #{executable} #{simulator[:post_support]}"
    end
    output = execute(cmd_str)
    test_results = $cfg['compiler']['build_path'] + test_base
    if output.match(/OK$/m).nil?
      test_results += '.testfail'
    else
      test_results += '.testpass'
    end
    File.open(test_results, 'w') { |f| f.print output }
  end
end