# encoding: utf-8
module WebTranslateIt
  class String
    require 'json'
    
    attr_accessor :id, :key, :plural, :type, :dev_comment, :word_count, :status, :category, :labels, :file,
                  :created_at, :updated_at, :translations, :new_record
    
    # Initialize a new WebTranslateIt::String
    #
    # Implementation Example:
    #
    #   WebTranslateIt::String.new({ :key => "product_name_123" })
    #
    # to instantiate a new String without any text.
    #
    #   translation_en = WebTranslateIt::Translation.new({ :locale => "en", :text => "Hello" })
    #   translation_fr = WebTranslateIt::Translation.new({ :locale => "fr", :text => "Bonjour" })
    #   WebTranslateIt::String.new({ :key => "product_name_123", :translations => [translation_en, translation_fr]})
    #
    # to instantiate a new String with a source and target translation.
    
    def initialize(params = {})
      params.stringify_keys!
      self.id           = params["id"] || nil
      self.key          = params["key"] || nil
      self.plural       = params["plural"] || nil
      self.type         = params["type"] || nil
      self.dev_comment  = params["dev_comment"] || nil
      self.word_count   = params["word_count"] || nil
      self.status       = params["status"] || nil
      self.category     = params["category"] || nil
      self.labels       = params["labels"] || nil
      self.file         = params["file"] || nil
      self.created_at   = params["created_at"] || nil
      self.updated_at   = params["updated_at"] || nil
      self.translations = params["translations"] || []
      self.new_record   = true
    end
    
    # Find a String based on filters
    #
    # Implementation Example:
    #
    #   WebTranslateIt::Connection.new('secret_api_token') do
    #     strings = WebTranslateIt::String.find_all({ :key => "product_name_123" })
    #   end
    #
    #   puts strings.inspect #=> An array of WebTranslateIt::String objects
    #
    # to find and instantiate an array of String which key is like `product_name_123`.
    
    def self.find_all(params = {})
      params.stringify_keys!
      url = "/api/projects/#{Connection.api_key}/strings.yaml"
      url += '?' + HashUtil.to_params("filters" => params) unless params.empty?

      request = Net::HTTP::Get.new(url)
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)

      begin
        strings = []
        while(request) do
          response = Connection.http_connection.request(request)
          YAML.load(response.body).each do |string_response|
            string = WebTranslateIt::String.new(string_response)
            string.new_record = false
            strings.push(string)
          end
          if response["Link"] && response["Link"].include?("rel=\"next\"")
            url = response["Link"].match(/<(.*)>; rel="next"/)[1]
            request = Net::HTTP::Get.new(url)
            request.add_field("X-Client-Name", "web_translate_it")
            request.add_field("X-Client-Version", WebTranslateIt::Util.version)
          else
            request = nil
          end
        end
        return strings
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end
    end
    
    # Find a String based on its ID
    # Return a String object, or nil if not found.
    #
    # Implementation Example:
    #
    #   WebTranslateIt::Connection.new('secret_api_token') do
    #     string = WebTranslateIt::String.find(1234)
    #   end
    #
    #   puts string.inspect #=> A WebTranslateIt::String object
    #
    # to find and instantiate the String which ID is `1234`.
    #
    
    def self.find(id)
      request = Net::HTTP::Get.new("/api/projects/#{Connection.api_key}/strings/#{id}.yaml")
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)

      begin
        response = Connection.http_connection.request(request)
        return nil if response.code.to_i == 404
        string = WebTranslateIt::String.new(YAML.load(response.body))
        string.new_record = false
        return string
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end
    end
    
    # Update or create a String to WebTranslateIt.com
    #
    # Implementation Example:
    #
    #   WebTranslateIt::Connection.new('secret_api_token') do
    #     string = WebTranslateIt::String.find(1234)
    #     string.status = "status_obsolete"
    #     string.save
    #   end
    #
    
    def save
      self.new_record ? self.create : self.update
    end
    
    # Delete a String on WebTranslateIt.com
    #
    # Implementation Example:
    #
    #   WebTranslateIt::Connection.new('secret_api_token') do
    #     string = WebTranslateIt::String.find(1234)
    #     string.delete
    #   end
    #
    
    def delete
      request = Net::HTTP::Delete.new("/api/projects/#{Connection.api_key}/strings/#{self.id}")
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)

      begin
        Util.handle_response(Connection.http_connection.request(request), true, true)
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end
    end
    
    # Gets a Translation for a String
    #
    # Implementation Example:
    #
    #   WebTranslateIt::Connection.new('secret_api_token') do
    #     string = WebTranslateIt::String.find(1234)
    #     puts string.translation_for("fr") #=> A Translation object
    #   end
    #
    
    def translation_for(locale)
      translation = self.translations.detect{ |t| t.locale == locale }
      return translation if translation
      return nil if self.new_record
      request = Net::HTTP::Get.new("/api/projects/#{Connection.api_key}/strings/#{self.id}/locales/#{locale}/translations.yaml")
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)

      begin
        response = Util.handle_response(Connection.http_connection.request(request), true, true)
        hash = YAML.load(response)
        return nil if hash.empty?
        translation = WebTranslateIt::Translation.new(hash)
        return translation
        
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end      
    end
    
    protected
    
    # Save the changes made to a String to WebTranslateIt.com
    #
    
    def update
      request = Net::HTTP::Put.new("/api/projects/#{Connection.api_key}/strings/#{self.id}.yaml")
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)
      request.add_field("Content-Type", "application/json")
      request.body = self.to_json
      
      self.translations.each do |translation|
        translation.string_id = self.id
        translation.save
      end
      
      begin
        Util.handle_response(Connection.http_connection.request(request), true, true)
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end
    end
    
    # Create a new String to WebTranslateIt.com
    #
    
    def create
      request = Net::HTTP::Post.new("/api/projects/#{Connection.api_key}/strings")
      request.add_field("X-Client-Name", "web_translate_it")
      request.add_field("X-Client-Version", WebTranslateIt::Util.version)
      request.add_field("Content-Type", "application/json")
      request.body = self.to_json(true)

      begin
        response = YAML.load(Util.handle_response(Connection.http_connection.request(request), true, true))
        self.id = response["id"]
        self.new_record = false
        return true
      rescue Timeout::Error
        puts "The request timed out. The service may be overloaded. We will retry in 5 seconds."
        sleep(5)
        retry
      end
    end
    
    def to_json(with_translations = false)
      hash = {
        "id" => id,
        "key" => key,
        "plural" => plural,
        "type" => type,
        "dev_comment" => dev_comment,
        "status" => status,
        "labels" => labels,
        "category" => category,
        "file" => file
      }
      if self.translations.any? && with_translations
        hash.update({ "translations" => [] })
        translations.each do |translation|
          hash["translations"].push(translation.to_hash)
        end
      end
      hash.to_json
    end
  end
end