package extensions

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"
)

type SetExtensionRequiredConfigurationRequest struct {
	// The ID of the extension to update.
	ExtensionID string `json:"extension_id"`

	// The version of the extension to update.
	ExtensionVersion string `json:"extension_version"`

	// The required_configuration string to use with the extension.
	RequiredConfiguration string `json:"required_configuration"`
}

// Updates the extension’s required_configuration string.
// Use this endpoint if your extension requires the broadcaster to configure the extension before activating it
// (to require configuration, you must select Custom/My Own Service in Extension Capabilities).
// For more information,
// see Required Configurations: https://dev.twitch.tv/docs/extensions/building#required-configurations
// and Setting Required Configuration: https://dev.twitch.tv/docs/extensions/building#setting-required-configuration-with-the-configuration-service-optional
//
// Requires a signed JSON Web Token (JWT) created by an EBS. For signing requirements,
// see Signing the JWT: https://dev.twitch.tv/docs/extensions/building/#signing-the-jwt
// The signed JWT must include the role, user_id, and exp fields
// (see JWT Schema: https://dev.twitch.tv/docs/extensions/reference/#jwt-schema).
// Set the role field to external and the user_id field to the ID of the user that owns the extension.
func (c *Extensions) SetExtensionRequiredConfiguration(ctx context.Context, broadcasterID string, body *SetExtensionRequiredConfigurationRequest) error {
	endpoint := c.baseUrl.ResolveReference(&url.URL{Path: "extensions/required_configuration", RawQuery: "broadcaster_id=" + broadcasterID})

	r, w := io.Pipe()

	go func() {
		if err := json.NewEncoder(w).Encode(body); err != nil {
			w.CloseWithError(err)
		} else {
			w.Close()
		}
	}()

	req, err := http.NewRequestWithContext(ctx, http.MethodPut, endpoint.String(), r)
	if err != nil {
		return err
	}

	res, err := c.client.Do(req)
	if err != nil {
		return err
	}
	defer res.Body.Close()

	statusOK := res.StatusCode >= 200 && res.StatusCode < 300
	if !statusOK {
		return fmt.Errorf("failed to set extension required configuration (%d)", res.StatusCode)
	}

	return nil
}