// Package sms_mock - dev server-backed mock SMS sender.
package sms_mock

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

// Sender implements sms.Sender by posting to a dev server endpoint. The dev
// server records messages in an inbox visible in the dev UI, so codes texted
// during development can be read back. Mirrors mail_mock.Sender.
type Sender struct {
	URL string // e.g. "http://localhost:8099/sms/send"
}

type sendReq struct {
	To   string
	Text string
}

func (s *Sender) Send(ctx context.Context, phone, message string) error {

	body, err := json.Marshal(sendReq{To: phone, Text: message})
	if err != nil {
		return err
	}

	req, err := http.NewRequestWithContext(ctx, http.MethodPost, s.URL, bytes.NewReader(body))
	if err != nil {
		return err
	}
	req.Header.Set("Content-Type", "application/json")

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return fmt.Errorf("mock sms: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode >= 400 {
		return fmt.Errorf("mock sms: server returned %d", resp.StatusCode)
	}
	return nil
}