package schedule

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

	"go.fifitido.net/twitch/api/endpoint"
)

type CreateChannelStreamScheduleSegmentRequest struct {
	// The date and time that the broadcast segment starts. Specify the date and time in RFC3339 format (for example, 2021-07-01T18:00:00Z).
	StartTime time.Time `json:"start_time"`

	// The time zone where the broadcast takes place. Specify the time zone using IANA time zone database format (for example, America/New_York).
	Timezone string `json:"timezone"`

	// The length of time, in minutes, that the broadcast is scheduled to run. The duration must be in the range 30 through 1380 (23 hours).
	Duration int `json:"duration"`

	// A Boolean value that determines whether the broadcast recurs weekly. Is true if the broadcast recurs weekly.
	// Only partners and affiliates may add non-recurring broadcasts.
	IsRecurring *bool `json:"is_recurring,omitempty"`

	// The ID of the category that best represents the broadcast’s content.
	// To get the category ID, use the Search Categories endpoint.
	CategoryId *string `json:"category_id"`

	// The broadcast’s title. The title may contain a maximum of 140 characters.
	Title *string `json:"title"`
}

type CreateChannelStreamScheduleSegmentResponse struct {
	// The broadcaster’s streaming schedule.
	Data ChannelStreamSchedule `json:"data"`
}

// Adds a single or recurring broadcast to the broadcaster’s streaming schedule. For information about scheduling broadcasts, see Stream Schedule.
//
// Requires a user access token that includes the channel:manage:schedule scope.
//
// The broadcaster ID must match the user ID in the user access token.
func (s *Schedule) CreateChannelStreamScheduleSegment(ctx context.Context, broadcasterId string, body *CreateChannelStreamScheduleSegmentRequest) (*CreateChannelStreamScheduleSegmentResponse, error) {
	v := url.Values{"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.MethodPost, endpoint.Make(s.baseUrl, "schedule/segment", v), r)
	if err != nil {
		return nil, err
	}

	res, err := s.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 create channel stream schedule segment (%d)", res.StatusCode)
	}

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

	return &data, nil
}