Odania-IT/odania-gem

module Odania
    module Config
        class SubdomainConfig

            def initialize(global_config, domain, subdomain)
                @global_config = global_config
                @domain = domain
                @subdomain = subdomain
                @errors = []
            end

            def generate
                @layout = get_layout_name
                config = {
                    domain: @domain,
                    subdomain: @subdomain,
                    full_domain: "#{@subdomain}.#{@domain}",
                    layout: @layout,
                    config: generate_merged_config,
                    partials: generate_merged_partials
                }

                layout_config = get_layout_config @layout
                layout_config.delete('assets')
                config[:styles] = layout_config['config']['styles']
                config[:errors] = @errors

                if $debug
                    $logger.debug 'Generated config:'
                    $logger.debug JSON.pretty_generate(config)
                end

                config
            end

            private

            def get_layout_name
                # subdomain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, @subdomain, 'config', 'layout']
                return result unless result.nil?

                # domain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, '_general', 'config', 'layout']
                return result unless result.nil?

                # general layouts
                result = retrieve_hash_path @global_config, %w(domains _general _general config layout)
                return result unless result.nil?

                # general layouts
                result = retrieve_hash_path @global_config, %w(config layout)
                return result unless result.nil?

                'simple'
            end

            def get_layout_config(layout)
                # subdomain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, @subdomain, 'layouts', layout]
                return result unless result.nil?

                # domain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, '_general', 'layouts', layout]
                return result unless result.nil?

                # general layouts
                result = retrieve_hash_path @global_config, ['domains', '_general', '_general', 'layouts', layout]
                return result unless result.nil?

                $logger.error "Layout not found: #{layout}"
                @errors << "Layout not found: #{layout}"
                {'config' => {'styles' => {}}}
            end

            def generate_merged_config
                config = retrieve_hash_path @global_config, %w(domains _general _general config)
                config = {} if config.nil?

                # domain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, '_general', 'config']
                config.deep_merge!(result) unless result.nil?

                # subdomain specific layouts
                result = retrieve_hash_path @global_config, ['domains', @domain, @subdomain, 'config']
                config.deep_merge!(result) unless result.nil?

                config
            end

            def generate_merged_partials
                partials = retrieve_hash_path @global_config, %w(partials _general _general default)
                partials = {} if partials.nil?

                # general specific layout
                result = retrieve_hash_path @global_config, ['partials', '_general', '_general', 'layouts', @layout]
                partials.deep_merge!(result) unless result.nil?

                # domain specific
                result = retrieve_hash_path @global_config, ['partials', @domain, '_general', 'default']
                partials.deep_merge!(result) unless result.nil?

                # domain specific layout
                result = retrieve_hash_path @global_config, ['partials', @domain, '_general', 'layouts', @layout]
                partials.deep_merge!(result) unless result.nil?

                # subdomain
                result = retrieve_hash_path @global_config, ['partials', @domain, @subdomain, 'default']
                partials.deep_merge!(result) unless result.nil?

                # subdomain specific layout
                result = retrieve_hash_path @global_config, ['partials', @domain, @subdomain, 'layouts', @layout]
                partials.deep_merge!(result) unless result.nil?

                partials
            end

            def retrieve_hash_path(hash, path)
                key = path.shift

                return nil until hash.has_key? key
                return hash[key].clone if path.empty?
                retrieve_hash_path hash[key], path
            end

        end
    end
end