package messenger

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

func (s *Service) SendSMS(ctx context.Context, receiverPhone, message string) error {
	return s.SendAfroMessageSMSLatest(ctx, receiverPhone, message, nil)
}

func (s *Service) SendAfroMessageSMSLatest(
	ctx context.Context,
	receiverPhone string,
	message string,
	callbackURL *string, // optional
) error {

	baseURL := s.config.AFROSMSConfig.AfroSMSBaseURL

	// Build query parameters explicitly
	params := url.Values{}
	params.Set("to", receiverPhone)
	params.Set("message", message)
	params.Set("sender", s.config.AFROSMSConfig.AfroSMSSenderName)

	// Optional parameters
	if s.config.AFROSMSConfig.AfroSMSIdentifierID != "" {
		params.Set("from", s.config.AFROSMSConfig.AfroSMSIdentifierID)
	}

	if callbackURL != nil {
		params.Set("callback", *callbackURL)
	}

	// Construct full URL
	reqURL := fmt.Sprintf("%s/api/send?%s", baseURL, params.Encode())

	req, err := http.NewRequestWithContext(ctx, http.MethodGet, reqURL, nil)
	if err != nil {
		return err
	}

	// AfroMessage authentication (API key)
	req.Header.Set("Authorization", "Bearer "+s.config.AFROSMSConfig.AfroSMSAPIKey)
	req.Header.Set("Accept", "application/json")

	client := &http.Client{
		Timeout: 10 * time.Second,
	}

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

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return err
	}

	if resp.StatusCode != http.StatusOK {
		return fmt.Errorf(
			"afromessage sms failed: status=%d response=%s",
			resp.StatusCode,
			string(body),
		)
	}

	// Parse response
	var result map[string]interface{}
	if err := json.Unmarshal(body, &result); err != nil {
		return err
	}

	ack, ok := result["acknowledge"].(string)
	if !ok || ack != "success" {
		return fmt.Errorf("sms delivery failed: %v", result)
	}

	return nil
}