=begin
PureCloud Platform API

With the PureCloud Platform API, you can control all aspects of your PureCloud environment. With the APIs you can access the system configuration, manage conversations and more.

OpenAPI spec version: v2
Contact: DeveloperEvangelists@genesys.com
Generated by: https://github.com/swagger-api/swagger-codegen.git

License: UNLICENSED
https://help.mypurecloud.com/articles/terms-and-conditions/

Terms of Service: https://help.mypurecloud.com/articles/terms-and-conditions/

=end

require 'date'
require 'json'
require 'logger'
require 'tempfile'
require 'typhoeus'
require 'uri'

module PureCloud
  class ApiClient
    # The Configuration object holding settings to be used in the API client.
    attr_accessor :config

    # Defines the headers to be used in HTTP requests of all API calls by default.
    #
    # @return [Hash]
    attr_accessor :default_headers

    def initialize(config = Configuration.default)
      @config = config
      @user_agent = "PureCloud SDK/ruby"
      @default_headers = {
        'Content-Type' => "application/json",
        'User-Agent' => @user_agent
      }
    end

    def self.default
      @@default ||= ApiClient.new
    end

    # Call an API with given options.
    #
    # @return [Array<(Object, Fixnum, Hash)>] an array of 3 elements:
    #   the data deserialized from response body (could be nil), response status code and response headers.
    def call_api(http_method, path, opts = {})
      request = build_request(http_method, path, opts)
      response = request.run

      if @config.debugging
        @config.logger.debug "HTTP response body ~BEGIN~\n#{response.body}\n~END~\n"
      end

      unless response.success?
        fail ApiError.new(:code => response.code,
                          :response_headers => response.headers,
                          :response_body => response.body),
             response.status_message
      end

      if opts[:return_type]
        data = deserialize(response, opts[:return_type])
      else
        data = nil
      end
      return data, response.code, response.headers
    end

    def build_request(http_method, path, opts = {})
      url = build_request_url(path)
      http_method = http_method.to_sym.downcase

      header_params = @default_headers.merge(opts[:header_params] || {})
      header_params['purecloud-sdk'] = '60.0.0'
      query_params = opts[:query_params] || {}
      form_params = opts[:form_params] || {}

      
      update_params_for_auth! header_params, query_params, opts[:auth_names]
      

      req_opts = {
        :method => http_method,
        :headers => header_params,
        :params => query_params,
        :timeout => @config.timeout,
        :ssl_verifypeer => @config.verify_ssl,
        :sslcert => @config.cert_file,
        :sslkey => @config.key_file,
        :verbose => @config.debugging
      }

      req_opts[:cainfo] = @config.ssl_ca_cert if @config.ssl_ca_cert

      if [:post, :patch, :put, :delete].include?(http_method)
        req_body = build_request_body(header_params, form_params, opts[:body])
        req_opts.update :body => req_body
        if @config.debugging
          @config.logger.debug "HTTP request body param ~BEGIN~\n#{req_body}\n~END~\n"
        end
      end

      Typhoeus::Request.new(url, req_opts)
    end

    # Check if the given MIME is a JSON MIME.
    # JSON MIME examples:
    #   application/json
    #   application/json; charset=UTF8
    #   APPLICATION/JSON
    def json_mime?(mime)
       !!(mime =~ /\Aapplication\/json(;.*)?\z/i)
    end

    # Deserialize the response to the given return type.
    #
    # @param [String] return_type some examples: "User", "Array[User]", "Hash[String,Integer]"
    def deserialize(response, return_type)
      body = response.body
      return nil if body.nil? || body.empty?

      # return response body directly for String return type
      return body if return_type == 'String'

      # handle file downloading - save response body into a tmp file and return the File instance
      return download_file(response) if return_type == 'File'

      # ensuring a default content type
      content_type = response.headers['Content-Type'] || 'application/json'

      fail "Content-Type is not supported: #{content_type}" unless json_mime?(content_type)

      begin
        data = JSON.parse("[#{body}]", :symbolize_names => true)[0]
      rescue JSON::ParserError => e
        if %w(String Date DateTime).include?(return_type)
          data = body
        else
          raise e
        end
      end

      convert_to_type data, return_type
    end

    # Convert data to the given return type.
    def convert_to_type(data, return_type)
      return nil if data.nil?
      case return_type
      when 'String'
        data.to_s
      when 'Integer'
        data.to_i
      when 'Float'
        data.to_f
      when 'BOOLEAN'
        data == true
      when 'DateTime'
        # parse date time (expecting ISO 8601 format)
        DateTime.parse data
      when 'Date'
        # parse date time (expecting ISO 8601 format)
        Date.parse data
      when 'Object'
        # generic object (usually a Hash), return directly
        data
      when /\AArray<(.+)>\z/
        # e.g. Array<Pet>
        sub_type = $1
        data.map {|item| convert_to_type(item, sub_type) }
      when /\AHash\<String, (.+)\>\z/
        # e.g. Hash<String, Integer>
        sub_type = $1
        {}.tap do |hash|
          data.each {|k, v| hash[k] = convert_to_type(v, sub_type) }
        end
      else
        # models, e.g. Pet
        Object.const_get("PureCloud").const_get(return_type).new.tap do |model|
          model.build_from_hash data
        end
      end
    end

    # Save response body into a file in (the defined) temporary folder, using the filename
    # from the "Content-Disposition" header if provided, otherwise a random filename.
    #
    # @see Configuration#temp_folder_path
    # @return [Tempfile] the file downloaded
    def download_file(response)
      content_disposition = response.headers['Content-Disposition']
      if content_disposition
        filename = content_disposition[/filename=['"]?([^'"\s]+)['"]?/, 1]
        prefix = sanitize_filename(filename)
      else
        prefix = 'download-'
      end
      prefix = prefix + '-' unless prefix.end_with?('-')

      tempfile = nil
      encoding = response.body.encoding
      Tempfile.open(prefix, @config.temp_folder_path, encoding: encoding) do |file|
        file.write(response.body)
        tempfile = file
      end
      @config.logger.info "Temp file written to #{tempfile.path}, please copy the file to a proper folder "\
                          "with e.g. `FileUtils.cp(tempfile.path, '/new/file/path')` otherwise the temp file "\
                          "will be deleted automatically with GC. It's also recommended to delete the temp file "\
                          "explicitly with `tempfile.delete`"
      tempfile
    end

    # Sanitize filename by removing path.
    # e.g. ../../sun.gif becomes sun.gif
    #
    # @param [String] filename the filename to be sanitized
    # @return [String] the sanitized filename
    def sanitize_filename(filename)
      filename.gsub /.*[\/\\]/, ''
    end

    def build_request_url(path)
      # Add leading and trailing slashes to path
      path = "/#{path}".gsub(/\/+/, '/')
      URI.encode(@config.base_url + path)
    end

    def build_request_body(header_params, form_params, body)
      # http form
      if header_params['Content-Type'] == 'application/x-www-form-urlencoded' ||
          header_params['Content-Type'] == 'multipart/form-data'
        data = {}
        form_params.each do |key, value|
          case value
          when File, Array, nil
            # let typhoeus handle File, Array and nil parameters
            data[key] = value
          else
            data[key] = value.to_s
          end
        end
      elsif body
        data = body.is_a?(String) ? body : body.to_json
      else
        data = nil
      end
      data
    end

    # Update hearder and query params based on authentication settings.
    def update_params_for_auth!(header_params, query_params, auth_names)
      Array(auth_names).each do |auth_name|
        auth_setting = @config.auth_settings[auth_name]
        next unless auth_setting
        case auth_setting[:in]
        when 'header' then header_params[auth_setting[:key]] = auth_setting[:value]
        when 'query'  then query_params[auth_setting[:key]] = auth_setting[:value]
        else fail ArgumentError, 'Authentication token must be in `query` of `header`'
        end
      end
    end

    def user_agent=(user_agent)
      @user_agent = user_agent
      @default_headers['User-Agent'] = @user_agent
    end

    # Return Accept header based on an array of accepts provided.
    # @param [Array] accepts array for Accept
    # @return [String] the Accept header (e.g. application/json)
    def select_header_accept(accepts)
      return nil if accepts.nil? || accepts.empty?
      # use JSON when present, otherwise use all of the provided
      json_accept = accepts.find { |s| json_mime?(s) }
      return json_accept || accepts.join(',')
    end

    # Return Content-Type header based on an array of content types provided.
    # @param [Array] content_types array for Content-Type
    # @return [String] the Content-Type header  (e.g. application/json)
    def select_header_content_type(content_types)
      # use application/json by default
      return 'application/json' if content_types.nil? || content_types.empty?
      # use JSON when present, otherwise use the first one
      json_content_type = content_types.find { |s| json_mime?(s) }
      return json_content_type || content_types.first
    end

    # Convert object (array, hash, object, etc) to JSON string.
    # @param [Object] model object to be converted into JSON string
    # @return [String] JSON string representation of the object
    def object_to_http_body(model)
      return model if model.nil? || model.is_a?(String)
      _body = nil
      if model.is_a?(Array)
        _body = model.map{|m| object_to_hash(m) }
      else
        _body = object_to_hash(model)
      end
      _body.to_json
    end

    # Convert object(non-array) to hash.
    # @param [Object] obj object to be converted into JSON string
    # @return [String] JSON string representation of the object
    def object_to_hash(obj)
      if obj.respond_to?(:to_hash)
        obj.to_hash
      else
        obj
      end
    end

    # Build parameter value according to the given collection format.
    # @param [String] collection_format one of :csv, :ssv, :tsv, :pipes and :multi
    def build_collection_param(param, collection_format)
      case collection_format
      when :csv
        param.join(',')
      when :ssv
        param.join(' ')
      when :tsv
        param.join("\t")
      when :pipes
        param.join('|')
      when :multi
        param.join(',')
      else
        fail "unknown collection format: #{collection_format.inspect}"
      end
    end
  end
end