# frozen_string_literal: true

$LOAD_PATH.unshift("#{File.dirname(__FILE__)}/../lib/")

RMAGICK_BYPASS_VERSION_TEST = true

require 'simplecov'
SimpleCov.start

require 'gruff'
require 'fileutils'

TEST_OUTPUT_DIR = File.dirname(__FILE__) + "/output#{'_java' if RUBY_PLATFORM == 'java'}"
FileUtils.mkdir_p(TEST_OUTPUT_DIR)
FileUtils.rm_f Dir["#{TEST_OUTPUT_DIR}/*"]

require 'minitest/autorun'
require 'minitest/reporters'
require_relative 'support/appearance_assertion'
Minitest::Reporters.use!

class Gruff::Base
  alias write_org write

  def write(filename = 'graph.png')
    basefilename = File.basename(filename).split('.')[0..-2].join('.')
    extension = File.extname(filename)
    testfilename = File.join(TEST_OUTPUT_DIR, basefilename) + extension
    counter = 0
    while File.exist?(testfilename)
      counter += 1
      testfilename = File.join(TEST_OUTPUT_DIR, basefilename) + "-#{counter}#{extension}"
    end
    write_org(testfilename)
  end
end

class GruffCustomData
  def initialize(data)
    @data = data
  end

  def to_a
    @data
  end
end

class GruffTestCase < Minitest::Test
  def setup
    srand 42
    @datasets = [
      [:Jimmy, [25, 36, 86, 39, 25, 31, 79, 88]],
      [:Charles, [80, 54, 67, 54, 68, 70, 90, 95]],
      [:Julie, [22, 29, 35, 38, 36, 40, 46, 57]],
      [:Jane, [95, 95, 95, 90, 85, 80, 88, 100]],
      [:Philip, [90, 34, 23, 12, 78, 89, 98, 88]],
      [:Arthur, [5, 10, 13, 11, 6, 16, 22, 32]]
    ]

    @labels = {
      0 => '5/6',
      1 => '5/15',
      2 => '5/24',
      3 => '5/30',
      4 => '6/4',
      5 => '6/12',
      6 => '6/21',
      7 => '6/28'
    }
  end

  def setup_single_dataset
    @datasets = [
      [:Jimmy, [25, 36, 86]]
    ]

    @labels = {
      0 => 'You',
      1 => 'Average',
      2 => 'Lifetime'
    }
  end

  def setup_wide_dataset
    @datasets = [
      ['Auto', 25],
      ['Food', 5],
      ['Entertainment', 15]
    ]

    @labels = { 0 => 'This Month' }
  end

  def fixtures_dir
    File.join(File.dirname(__FILE__), 'fixtures')
  end

  def arm_platform?
    RUBY_PLATFORM.include?('aarch64')
  end

protected

  # Generate graphs at several sizes.
  #
  # Also writes the graph to disk.
  #
  #   graph_sized 'bar_basic' do |g|
  #     g.data('students', [1, 2, 3, 4])
  #   end
  #
  def graph_sized(filename, sizes = ['', 400])
    class_name = self.class.name.gsub(/^TestGruff/, '')
    Array(sizes).each do |size|
      g = instance_eval("Gruff::#{class_name}.new #{size}", __FILE__, __LINE__)
      g.title = "#{class_name} Graph"
      yield g
      write_test_file g, "#{filename}_#{size}.png"
    end
  end

  def write_test_file(graph, filename)
    testfilename = [TEST_OUTPUT_DIR, filename].join('/')
    basefilename = filename.split('.')[0..-2].join('.')
    extension = filename.slice(/\..*$/)
    counter = 0
    while File.exist? testfilename
      counter += 1
      testfilename = [TEST_OUTPUT_DIR, basefilename].join('/') + "-#{counter}#{extension}"
    end
    graph.write(testfilename)
  end

  ##
  # Example:
  #
  #   setup_basic_graph Gruff::Pie, 400
  #
  def setup_basic_graph(*args)
    klass = Gruff::Bar
    size = 400
    # Allow args to be klass, size or just klass or just size.
    #
    # TODO Refactor
    case args.length
    when 1
      case args[0]
      when Integer, String
        size = args[0]
        klass = instance_eval("Gruff::#{self.class.name.gsub(/^TestGruff/, '')}", __FILE__, __LINE__)
      else
        klass = args[0]
      end
    when 2
      klass = args[0]
      size = args[1]
    end

    g = klass.new(size)
    g.title = 'My Bar Graph'
    g.labels = @labels
    g.font = File.join(fixtures_dir, 'Roboto-Light.ttf')

    @datasets.each do |data|
      g.data(data[0], data[1])
    end
    g
  end
end
