package extensions

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"

	"github.com/google/go-querystring/query"
	"go.fifitido.net/twitch/api/endpoint"
)

type GetExtensionConfigurationSegmentParams struct {
	// The ID of the broadcaster that installed the extension.
	// This parameter is required if you set the segment parameter to broadcaster or developer.
	// Do not specify this parameter if you set segment to global.
	BroadcasterID *string `url:"broadcaster_id,omitempty"`

	// The ID of the extension that contains the configuration segment you want to get.
	ExtensionID string `url:"extension_id"`

	// The type of configuration segment to get. Possible case-sensitive values are:
	//
	// broadcaster, developer, global
	//
	// You may specify one or more segments. To specify multiple segments, include the segment parameter for each segment to get.
	// For example, segment=broadcaster&segment=developer. Ignores duplicate segments.
	Segment []ConfigurationSegment `url:"segment"`
}

type GetExtensionConfigurationSegmentResponse struct {
	// The list of requested configuration segments.
	// The list is returned in the same order that you specified the list of segments in the request.
	Data []ConfigurationSegmentData `json:"data"`
}

type ConfigurationSegmentData struct {
	// The type of segment.
	Segment ConfigurationSegment `json:"segment"`

	// The ID of the broadcaster that installed the extension.
	// The object includes this field only if the segment query parameter is set to developer or broadcaster.
	BroadcasterID *string `json:"broadcaster_id,omitempty"`

	// The contents of the segment. This string may be a plain-text string or a string-encoded JSON object.
	Content string `json:"content"`

	// The version number that identifies this definition of the segment’s data.
	Version string `json:"version"`
}

// Gets the specified configuration segment from the specified extension.
//
// Rate Limits: You may retrieve each segment a maximum of 20 times per minute.
//
// 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).
// The role field must be set to external.
func (e *Extensions) GetExtensionConfigurationSegment(ctx context.Context, params *GetExtensionConfigurationSegmentParams) (*GetExtensionConfigurationSegmentResponse, error) {
	v, _ := query.Values(params)

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint.Make(e.baseUrl, "extensions/configurations", v), nil)
	if err != nil {
		return nil, err
	}

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

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

	var data GetExtensionConfigurationSegmentResponse
	if err := json.NewDecoder(res.Body).Decode(&data); err != nil {
		return nil, err
	}

	return &data, nil
}