class RKConnect

# File lib/rkconnect.rb, line 10
def initialize(ip_address, &block)
        #Check to make sure that the ip address used to initialize is valid
        raise 'Invalid ip_address type. Need a string arg' if !ip_address.is_a? String
        raise 'Invalid ip_address.' if ip_address.split('.').size != 4
        raise 'No callback block was passed in. Make sure a block is passed in as an argument.' if block == nil

        #Set two different ip addresses. One is just the ip address and the other 'http' is used to send commands to the roku
        @ip_address = ip_address
        @http_address = 'http://' << ip_address << ':'\

        @callback = block

        @roku_debugger = Net::Telnet::new('Host' => @ip_address, 'Port' => DEBUGGER_PORT, 'Telnetmode' => false, 'Waittime' => 0.5)
end

# File lib/rkconnect.rb, line 64
def close_connection
        @roku_debugger.close
end

# File lib/rkconnect.rb, line 32
def post_channel(app_id)
        #Launch a channel based on the application id. Should be only be used in the home screen.
        raise 'Invalid app_id type. Need a string arg' if !app_id.is_a? String

        Net::HTTP.post_form(URI(@http_address + EXTERNAL_C_PORT + "/launch/#{app_id}"), {})
        sleep 0.25
end

# File lib/rkconnect.rb, line 25
def post_key(key)
        raise 'Invalid key type. Need a string arg' if !key.is_a? String

        Net::HTTP.post_form(URI(@http_address + EXTERNAL_C_PORT + "/keypress/#{key}"), {})  
        sleep 0.25
end

# File lib/rkconnect.rb, line 40
def request_channel_listing()
        #Returns a http response in xml format
        return Net::HTTP.get(URI(@http_address + EXTERNAL_C_PORT + "/query/apps"))
end

# File lib/rkconnect.rb, line 45
def request_debug(request)
        raise 'Invalid request type. Need a string arg' if !request.is_a? String

        callback_string = ' '
        #Breaks the telnet connection and enters the roku debugger.
        ignore_exceptions{@roku_debugger.cmd("String" => "\03", "Timeout" => 0.1)}

        @roku_debugger.cmd(request) do | telnet_callback |
                callback_string << telnet_callback
        end

        callback_string.sub!("BrightScript Debugger>", "")
        array = callback_string.split(/\n/)

        @callback.call(callback_string)

        ignore_exceptions{@roku_debugger.cmd("String" => "cont", "Timeout" => 0.1)}
end

# File lib/rkconnect.rb, line 69
def ignore_exceptions
        begin
                yield
        rescue Exception => e
                # puts(e.message)
        end
end