require_relative '../base'

module Analytics
  module Serializer
    class ObjC < Base
      class Screen
        def initialize(src)
          @src = src
        end

        def save(path)
          @class_name = 'AnalyticsScreen'

          @file_name = @class_name + '.h'
          output_path = File.join(path, @file_name)
          File.write(output_path, render_h)

          @file_name = @class_name + '.m'
          output_path = File.join(path, @file_name)
          File.write(output_path, render_m)
        end

        private

        def render_h
          ERB.new(template_h, nil, '-').result(binding)
        end

        def template_h
          <<~TEMPLATE
            <%= ERB.new(Analytics::Templates.tmpl_at('header.erb')).result(binding) %>

            #import <Foundation/Foundation.h>

            NS_ASSUME_NONNULL_BEGIN

            __swift_unavailable("This class is only available in ObjC.")
            @interface <%= @class_name %> : NSObject

            @property (nonatomic, strong, readonly) NSString *name;

            - (instancetype)init NS_UNAVAILABLE;
            + (instancetype)new NS_UNAVAILABLE;

            #pragma mark - Screens
            <% @src['screens'].each do |screen| %>
            /// <%= screen['description'] %>
            + (instancetype)<%= screen['name'].camel_case %>;
            <% end %>
            @end

            NS_ASSUME_NONNULL_END
          TEMPLATE
        end

        def render_m
          ERB.new(template_m, nil, '-').result(binding)
        end

        def template_m
          <<~TEMPLATE
            <%= ERB.new(Analytics::Templates.tmpl_at('header.erb')).result(binding) %>

            #import "<%= @class_name + '.h' %>"

            @implementation <%= @class_name %>

            - (instancetype)initWithName:(NSString *)name
            {
                if (self = [super init]) {
                    _name = name;
                }
                return self;
            }

            #pragma mark - Screens
            <% @src['screens'].each do |screen| %>
            + (instancetype)<%= screen['name'].camel_case %>
            {
                return [[self alloc] initWithName:@"<%= screen['name'] %>"];
            }
            <% end -%>

            @end
          TEMPLATE
        end
      end
    end
  end
end