class Parser

# File lib/uppercrust/parser.rb, line 5
def initialize(file_name, data, base_only)
  @file_name = file_name
  @data = data
  @base_only = base_only

  @generated_class = self.snake_to_camel(File.basename(file_name, '.json'))

  @properties = self.extract_properties(data['properties'])
  @variable_names = self.extract_variable_names(data['properties'].keys)
  @extends_class = self.extends_class(data)
  @import = self.get_import(data)
  @contains_classes = self.get_contains(data['properties'])
  @array_converters = self.get_array_converters(data['properties'])
end

# File lib/uppercrust/parser.rb, line 123
def copy_type(type)
  type != 'NSInteger' && type != 'BOOL'
end

# File lib/uppercrust/parser.rb, line 86
def extends_class(data)
  if data['extends'].to_s == ''
    'MTLModel<MTLJSONSerializing>'
  else
    if data['extends'].is_a? String
      '_' << self.snake_to_camel(Pathname.new(data['extends']).basename('.json').to_s)
    else
      '_' << self.snake_to_camel(Pathname.new(data['extends']['$ref']).basename('.json').to_s)
    end
  end
end

# File lib/uppercrust/parser.rb, line 112
def extract_properties(properties)
  extracted_properties = []

  properties.each do |name, type_info|
    type = match_type(type_info['type'])
    extracted_properties << "@property(#{self.copy_type(type) ? 'copy' : 'assign'}, nonatomic, readonly) #{type} #{self.copy_type(type) ? '*' : ''}#{name};"
  end

  extracted_properties
end

# File lib/uppercrust/parser.rb, line 98
def extract_variable_names(keys)
  extracted_variables_names = []

  if keys.length > 1
    last = keys.pop
    keys.each { |key| extracted_variables_names << "@\"#{key}\" : @\"#{key}\"," }
    extracted_variables_names << "@\"#{last}\" : @\"#{last}\""
  else
    extracted_variables_names << "@\"#{keys[0]}\" : @\"#{keys[0]}\""
  end

  extracted_variables_names
end

# File lib/uppercrust/parser.rb, line 20
def generate_files
  output = {}

  output["_#{@generated_class}.h"] = Mustache.render(read_template('base_header'),
                                                     :class_name => @generated_class,
                                                     :extends_class => @extends_class,
                                                     :import => @import,
                                                     :description => @data['description'],
                                                     :properties => @properties)

  output["_#{@generated_class}.m"] = Mustache.render(read_template('base_implementation'),
                                                     :class_name => @generated_class,
                                                     :properties => @variable_names,
                                                     :extends => !@import.nil?,
                                                     :contains => @contains_classes,
                                                     :array_converters => @array_converters)

  unless @base_only
    output["#{@generated_class}.h"] = Mustache.render(read_template('header'),
                                                      :class_name => @generated_class)

    output["#{@generated_class}.m"] = Mustache.render(read_template('implementation'),
                                                      :class_name => @generated_class)
  end

  output
end

# File lib/uppercrust/parser.rb, line 64
def get_array_converters(properties)
  array_converters = []

  properties.each do |name, type_info|
    if self.match_type(type_info['type']) == 'NSArray' && type_info['items']['$ref'] != nil
      extends = type_info['items']['$ref'] != '#' ? self.snake_to_camel(Pathname.new(type_info['items']['$ref']).basename('.json').to_s) : @generated_class
      array_converters << "+ (NSValueTransformer *)#{name}JSONTransformer {\n    return [NSValueTransformer mtl_JSONDictionaryTransformerWithModelClass:_#{extends}.class];\n}"
    end
  end

  array_converters
end

# File lib/uppercrust/parser.rb, line 52
def get_contains(properties)
  contains = []

  properties.each do |name, type_info|
    if self.match_type(type_info['type']) == 'NSArray' && type_info['items']['$ref'] != nil && type_info['items']['$ref'] != '#'
      contains << "#import \"_#{self.snake_to_camel(Pathname.new(type_info['items']['$ref']).basename('.json').to_s)}.h\""
    end
  end

  contains
end

# File lib/uppercrust/parser.rb, line 77
def get_import(data)
  if data['extends'].to_s == ''
    nil
  else
    import = data['extends'].is_a?(String) ? '_' << self.snake_to_camel(data['extends'].sub('.json', '')) : '_' << self.snake_to_camel(File.basename(data['extends']['$ref'], '.json'))
    "#import \"#{import}.h\""
  end
end

# File lib/uppercrust/parser.rb, line 127
def match_type(in_type)
  case in_type
    when 'string'
      'NSString'
    when 'number', 'long'
      'NSNumber'
    when 'integer'
      'NSInteger'
    when 'boolean'
      'BOOL'
    when 'object', 'any'
      'NSObject'
    when 'array'
      'NSArray'
    when 'null'
      'NSNull'
    else
      'NSObject'
  end
end

# File lib/uppercrust/parser.rb, line 48
def read_template(template_name)
  File.read("#{File.dirname(__FILE__)}/tpl/#{template_name}.mustache")
end

# File lib/uppercrust/parser.rb, line 148
def snake_to_camel(file_name)
  (file_name.split('_').length > 1) ? file_name.split('_').map { |w| w.capitalize }.join('') : file_name.capitalize
end