// Code generated by smithy-go-codegen DO NOT EDIT.

package lexruntimeservice

import (
	"context"
	"fmt"
	awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
	"github.com/aws/aws-sdk-go-v2/aws/signer/v4"
	"github.com/aws/aws-sdk-go-v2/service/lexruntimeservice/types"
	"github.com/aws/smithy-go/middleware"
	smithyhttp "github.com/aws/smithy-go/transport/http"
	"io"
)

// Sends user input (text or speech) to Amazon Lex. Clients use this API to send
// text and audio requests to Amazon Lex at runtime. Amazon Lex interprets the user
// input using the machine learning model that it built for the bot. The
// PostContent operation supports audio input at 8kHz and 16kHz. You can use 8kHz
// audio to achieve higher speech recognition accuracy in telephone audio
// applications. In response, Amazon Lex returns the next message to convey to the
// user. Consider the following example messages:
//   - For a user input "I would like a pizza," Amazon Lex might return a response
//     with a message eliciting slot data (for example, PizzaSize ): "What size pizza
//     would you like?".
//   - After the user provides all of the pizza order information, Amazon Lex
//     might return a response with a message to get user confirmation: "Order the
//     pizza?".
//   - After the user replies "Yes" to the confirmation prompt, Amazon Lex might
//     return a conclusion statement: "Thank you, your cheese pizza has been ordered.".
//
// Not all Amazon Lex messages require a response from the user. For example,
// conclusion statements do not require a response. Some messages require only a
// yes or no response. In addition to the message , Amazon Lex provides additional
// context about the message in the response that you can use to enhance client
// behavior, such as displaying the appropriate client user interface. Consider the
// following examples:
//   - If the message is to elicit slot data, Amazon Lex returns the following
//     context information:
//   - x-amz-lex-dialog-state header set to ElicitSlot
//   - x-amz-lex-intent-name header set to the intent name in the current context
//   - x-amz-lex-slot-to-elicit header set to the slot name for which the message
//     is eliciting information
//   - x-amz-lex-slots header set to a map of slots configured for the intent with
//     their current values
//   - If the message is a confirmation prompt, the x-amz-lex-dialog-state header
//     is set to Confirmation and the x-amz-lex-slot-to-elicit header is omitted.
//   - If the message is a clarification prompt configured for the intent,
//     indicating that the user intent is not understood, the x-amz-dialog-state
//     header is set to ElicitIntent and the x-amz-slot-to-elicit header is omitted.
//
// In addition, Amazon Lex also returns your application-specific sessionAttributes
// . For more information, see Managing Conversation Context (https://docs.aws.amazon.com/lex/latest/dg/context-mgmt.html)
// .
func (c *Client) PostContent(ctx context.Context, params *PostContentInput, optFns ...func(*Options)) (*PostContentOutput, error) {
	if params == nil {
		params = &PostContentInput{}
	}

	result, metadata, err := c.invokeOperation(ctx, "PostContent", params, optFns, c.addOperationPostContentMiddlewares)
	if err != nil {
		return nil, err
	}

	out := result.(*PostContentOutput)
	out.ResultMetadata = metadata
	return out, nil
}

type PostContentInput struct {

	// Alias of the Amazon Lex bot.
	//
	// This member is required.
	BotAlias *string

	// Name of the Amazon Lex bot.
	//
	// This member is required.
	BotName *string

	// You pass this value as the Content-Type HTTP header. Indicates the audio format
	// or text. The header value must start with one of the following prefixes:
	//   - PCM format, audio data must be in little-endian byte order.
	//   - audio/l16; rate=16000; channels=1
	//   - audio/x-l16; sample-rate=16000; channel-count=1
	//   - audio/lpcm; sample-rate=8000; sample-size-bits=16; channel-count=1;
	//   is-big-endian=false
	//   - Opus format
	//   - audio/x-cbr-opus-with-preamble; preamble-size=0; bit-rate=256000;
	//   frame-size-milliseconds=4
	//   - Text format
	//   - text/plain; charset=utf-8
	//
	// This member is required.
	ContentType *string

	// User input in PCM or Opus audio format or text format as described in the
	// Content-Type HTTP header. You can stream audio data to Amazon Lex or you can
	// create a local buffer that captures all of the audio data before sending. In
	// general, you get better performance if you stream audio data rather than
	// buffering the data locally.
	//
	// This member is required.
	InputStream io.Reader

	// The ID of the client application user. Amazon Lex uses this to identify a
	// user's conversation with your bot. At runtime, each request must contain the
	// userID field. To decide the user ID to use for your application, consider the
	// following factors.
	//   - The userID field must not contain any personally identifiable information of
	//   the user, for example, name, personal identification numbers, or other end user
	//   personal information.
	//   - If you want a user to start a conversation on one device and continue on
	//   another device, use a user-specific identifier.
	//   - If you want the same user to be able to have two independent conversations
	//   on two different devices, choose a device-specific identifier.
	//   - A user can't have two independent conversations with two different versions
	//   of the same bot. For example, a user can't have a conversation with the PROD and
	//   BETA versions of the same bot. If you anticipate that a user will need to have
	//   conversation with two different versions, for example, while testing, include
	//   the bot alias in the user ID to separate the two conversations.
	//
	// This member is required.
	UserId *string

	// You pass this value as the Accept HTTP header. The message Amazon Lex returns
	// in the response can be either text or speech based on the Accept HTTP header
	// value in the request.
	//   - If the value is text/plain; charset=utf-8 , Amazon Lex returns text in the
	//   response.
	//   - If the value begins with audio/ , Amazon Lex returns speech in the response.
	//   Amazon Lex uses Amazon Polly to generate the speech (using the configuration you
	//   specified in the Accept header). For example, if you specify audio/mpeg as the
	//   value, Amazon Lex returns speech in the MPEG format.
	//   - If the value is audio/pcm , the speech returned is audio/pcm in 16-bit,
	//   little endian format.
	//   - The following are the accepted values:
	//   - audio/mpeg
	//   - audio/ogg
	//   - audio/pcm
	//   - text/plain; charset=utf-8
	//   - audio/* (defaults to mpeg)
	Accept *string

	// A list of contexts active for the request. A context can be activated when a
	// previous intent is fulfilled, or by including the context in the request, If you
	// don't specify a list of contexts, Amazon Lex will use the current list of
	// contexts for the session. If you specify an empty list, all contexts for the
	// session are cleared.
	//
	// This value conforms to the media type: application/json
	ActiveContexts *string

	// You pass this value as the x-amz-lex-request-attributes HTTP header.
	// Request-specific information passed between Amazon Lex and a client application.
	// The value must be a JSON serialized and base64 encoded map with string keys and
	// values. The total size of the requestAttributes and sessionAttributes headers
	// is limited to 12 KB. The namespace x-amz-lex: is reserved for special
	// attributes. Don't create any request attributes with the prefix x-amz-lex: . For
	// more information, see Setting Request Attributes (https://docs.aws.amazon.com/lex/latest/dg/context-mgmt.html#context-mgmt-request-attribs)
	// .
	//
	// This value conforms to the media type: application/json
	RequestAttributes *string

	// You pass this value as the x-amz-lex-session-attributes HTTP header.
	// Application-specific information passed between Amazon Lex and a client
	// application. The value must be a JSON serialized and base64 encoded map with
	// string keys and values. The total size of the sessionAttributes and
	// requestAttributes headers is limited to 12 KB. For more information, see
	// Setting Session Attributes (https://docs.aws.amazon.com/lex/latest/dg/context-mgmt.html#context-mgmt-session-attribs)
	// .
	//
	// This value conforms to the media type: application/json
	SessionAttributes *string

	noSmithyDocumentSerde
}

type PostContentOutput struct {

	// A list of active contexts for the session. A context can be set when an intent
	// is fulfilled or by calling the PostContent , PostText , or PutSession
	// operation. You can use a context to control the intents that can follow up an
	// intent, or to modify the operation of your application.
	//
	// This value conforms to the media type: application/json
	ActiveContexts *string

	// One to four alternative intents that may be applicable to the user's intent.
	// Each alternative includes a score that indicates how confident Amazon Lex is
	// that the intent matches the user's intent. The intents are sorted by the
	// confidence score.
	//
	// This value conforms to the media type: application/json
	AlternativeIntents *string

	// The prompt (or statement) to convey to the user. This is based on the bot
	// configuration and context. For example, if Amazon Lex did not understand the
	// user intent, it sends the clarificationPrompt configured for the bot. If the
	// intent requires confirmation before taking the fulfillment action, it sends the
	// confirmationPrompt . Another example: Suppose that the Lambda function
	// successfully fulfilled the intent, and sent a message to convey to the user.
	// Then Amazon Lex sends that message in the response.
	AudioStream io.ReadCloser

	// The version of the bot that responded to the conversation. You can use this
	// information to help determine if one version of a bot is performing better than
	// another version.
	BotVersion *string

	// Content type as specified in the Accept HTTP header in the request.
	ContentType *string

	// Identifies the current state of the user interaction. Amazon Lex returns one of
	// the following values as dialogState . The client can optionally use this
	// information to customize the user interface.
	//   - ElicitIntent - Amazon Lex wants to elicit the user's intent. Consider the
	//   following examples: For example, a user might utter an intent ("I want to order
	//   a pizza"). If Amazon Lex cannot infer the user intent from this utterance, it
	//   will return this dialog state.
	//   - ConfirmIntent - Amazon Lex is expecting a "yes" or "no" response. For
	//   example, Amazon Lex wants user confirmation before fulfilling an intent. Instead
	//   of a simple "yes" or "no" response, a user might respond with additional
	//   information. For example, "yes, but make it a thick crust pizza" or "no, I want
	//   to order a drink." Amazon Lex can process such additional information (in these
	//   examples, update the crust type slot or change the intent from OrderPizza to
	//   OrderDrink).
	//   - ElicitSlot - Amazon Lex is expecting the value of a slot for the current
	//   intent. For example, suppose that in the response Amazon Lex sends this message:
	//   "What size pizza would you like?". A user might reply with the slot value (e.g.,
	//   "medium"). The user might also provide additional information in the response
	//   (e.g., "medium thick crust pizza"). Amazon Lex can process such additional
	//   information appropriately.
	//   - Fulfilled - Conveys that the Lambda function has successfully fulfilled the
	//   intent.
	//   - ReadyForFulfillment - Conveys that the client has to fulfill the request.
	//   - Failed - Conveys that the conversation with the user failed. This can happen
	//   for various reasons, including that the user does not provide an appropriate
	//   response to prompts from the service (you can configure how many times Amazon
	//   Lex can prompt a user for specific information), or if the Lambda function fails
	//   to fulfill the intent.
	DialogState types.DialogState

	// The text used to process the request. If the input was an audio stream, the
	// encodedInputTranscript field contains the text extracted from the audio stream.
	// This is the text that is actually processed to recognize intents and slot
	// values. You can use this information to determine if Amazon Lex is correctly
	// processing the audio that you send. The encodedInputTranscript field is base-64
	// encoded. You must decode the field before you can use the value.
	EncodedInputTranscript *string

	// The message to convey to the user. The message can come from the bot's
	// configuration or from a Lambda function. If the intent is not configured with a
	// Lambda function, or if the Lambda function returned Delegate as the
	// dialogAction.type in its response, Amazon Lex decides on the next course of
	// action and selects an appropriate message from the bot's configuration based on
	// the current interaction context. For example, if Amazon Lex isn't able to
	// understand user input, it uses a clarification prompt message. When you create
	// an intent you can assign messages to groups. When messages are assigned to
	// groups Amazon Lex returns one message from each group in the response. The
	// message field is an escaped JSON string containing the messages. For more
	// information about the structure of the JSON string returned, see
	// msg-prompts-formats . If the Lambda function returns a message, Amazon Lex
	// passes it to the client in its response. The encodedMessage field is base-64
	// encoded. You must decode the field before you can use the value.
	EncodedMessage *string

	// The text used to process the request. You can use this field only in the de-DE,
	// en-AU, en-GB, en-US, es-419, es-ES, es-US, fr-CA, fr-FR, and it-IT locales. In
	// all other locales, the inputTranscript field is null. You should use the
	// encodedInputTranscript field instead. If the input was an audio stream, the
	// inputTranscript field contains the text extracted from the audio stream. This is
	// the text that is actually processed to recognize intents and slot values. You
	// can use this information to determine if Amazon Lex is correctly processing the
	// audio that you send.
	//
	// Deprecated: The inputTranscript field is deprecated, use the
	// encodedInputTranscript field instead. The inputTranscript field is available
	// only in the de-DE, en-AU, en-GB, en-US, es-419, es-ES, es-US, fr-CA, fr-FR and
	// it-IT locales.
	InputTranscript *string

	// Current user intent that Amazon Lex is aware of.
	IntentName *string

	// You can only use this field in the de-DE, en-AU, en-GB, en-US, es-419, es-ES,
	// es-US, fr-CA, fr-FR, and it-IT locales. In all other locales, the message field
	// is null. You should use the encodedMessage field instead. The message to convey
	// to the user. The message can come from the bot's configuration or from a Lambda
	// function. If the intent is not configured with a Lambda function, or if the
	// Lambda function returned Delegate as the dialogAction.type in its response,
	// Amazon Lex decides on the next course of action and selects an appropriate
	// message from the bot's configuration based on the current interaction context.
	// For example, if Amazon Lex isn't able to understand user input, it uses a
	// clarification prompt message. When you create an intent you can assign messages
	// to groups. When messages are assigned to groups Amazon Lex returns one message
	// from each group in the response. The message field is an escaped JSON string
	// containing the messages. For more information about the structure of the JSON
	// string returned, see msg-prompts-formats . If the Lambda function returns a
	// message, Amazon Lex passes it to the client in its response.
	//
	// Deprecated: The message field is deprecated, use the encodedMessage field
	// instead. The message field is available only in the de-DE, en-AU, en-GB, en-US,
	// es-419, es-ES, es-US, fr-CA, fr-FR and it-IT locales.
	Message *string

	// The format of the response message. One of the following values:
	//   - PlainText - The message contains plain UTF-8 text.
	//   - CustomPayload - The message is a custom format for the client.
	//   - SSML - The message contains text formatted for voice output.
	//   - Composite - The message contains an escaped JSON object containing one or
	//   more messages from the groups that messages were assigned to when the intent was
	//   created.
	MessageFormat types.MessageFormatType

	// Provides a score that indicates how confident Amazon Lex is that the returned
	// intent is the one that matches the user's intent. The score is between 0.0 and
	// 1.0. The score is a relative score, not an absolute score. The score may change
	// based on improvements to Amazon Lex.
	//
	// This value conforms to the media type: application/json
	NluIntentConfidence *string

	// The sentiment expressed in an utterance. When the bot is configured to send
	// utterances to Amazon Comprehend for sentiment analysis, this field contains the
	// result of the analysis.
	SentimentResponse *string

	// Map of key/value pairs representing the session-specific context information.
	//
	// This value conforms to the media type: application/json
	SessionAttributes *string

	// The unique identifier for the session.
	SessionId *string

	// If the dialogState value is ElicitSlot , returns the name of the slot for which
	// Amazon Lex is eliciting a value.
	SlotToElicit *string

	// Map of zero or more intent slots (name/value pairs) Amazon Lex detected from
	// the user input during the conversation. The field is base-64 encoded. Amazon Lex
	// creates a resolution list containing likely values for a slot. The value that it
	// returns is determined by the valueSelectionStrategy selected when the slot type
	// was created or updated. If valueSelectionStrategy is set to ORIGINAL_VALUE , the
	// value provided by the user is returned, if the user value is similar to the slot
	// values. If valueSelectionStrategy is set to TOP_RESOLUTION Amazon Lex returns
	// the first value in the resolution list or, if there is no resolution list, null.
	// If you don't specify a valueSelectionStrategy , the default is ORIGINAL_VALUE .
	//
	// This value conforms to the media type: application/json
	Slots *string

	// Metadata pertaining to the operation's result.
	ResultMetadata middleware.Metadata

	noSmithyDocumentSerde
}

func (c *Client) addOperationPostContentMiddlewares(stack *middleware.Stack, options Options) (err error) {
	if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
		return err
	}
	err = stack.Serialize.Add(&awsRestjson1_serializeOpPostContent{}, middleware.After)
	if err != nil {
		return err
	}
	err = stack.Deserialize.Add(&awsRestjson1_deserializeOpPostContent{}, middleware.After)
	if err != nil {
		return err
	}
	if err := addProtocolFinalizerMiddlewares(stack, options, "PostContent"); err != nil {
		return fmt.Errorf("add protocol finalizers: %v", err)
	}

	if err = addlegacyEndpointContextSetter(stack, options); err != nil {
		return err
	}
	if err = addSetLoggerMiddleware(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddClientRequestIDMiddleware(stack); err != nil {
		return err
	}
	if err = smithyhttp.AddComputeContentLengthMiddleware(stack); err != nil {
		return err
	}
	if err = addResolveEndpointMiddleware(stack, options); err != nil {
		return err
	}
	if err = v4.AddUnsignedPayloadMiddleware(stack); err != nil {
		return err
	}
	if err = v4.AddContentSHA256HeaderMiddleware(stack); err != nil {
		return err
	}
	if err = addRetryMiddlewares(stack, options); err != nil {
		return err
	}
	if err = awsmiddleware.AddRawResponseToMetadata(stack); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecordResponseTiming(stack); err != nil {
		return err
	}
	if err = addClientUserAgent(stack, options); err != nil {
		return err
	}
	if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
		return err
	}
	if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
		return err
	}
	if err = addOpPostContentValidationMiddleware(stack); err != nil {
		return err
	}
	if err = stack.Initialize.Add(newServiceMetadataMiddleware_opPostContent(options.Region), middleware.Before); err != nil {
		return err
	}
	if err = awsmiddleware.AddRecursionDetection(stack); err != nil {
		return err
	}
	if err = addRequestIDRetrieverMiddleware(stack); err != nil {
		return err
	}
	if err = addResponseErrorMiddleware(stack); err != nil {
		return err
	}
	if err = addRequestResponseLogging(stack, options); err != nil {
		return err
	}
	if err = addDisableHTTPSMiddleware(stack, options); err != nil {
		return err
	}
	return nil
}

func newServiceMetadataMiddleware_opPostContent(region string) *awsmiddleware.RegisterServiceMetadata {
	return &awsmiddleware.RegisterServiceMetadata{
		Region:        region,
		ServiceID:     ServiceID,
		OperationName: "PostContent",
	}
}