// Package mail_mock - dev server-backed mock email sender.
package mail_mock

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

	"atlas9.dev/c/mail"
)

// Sender implements mail.Mailer by posting to a dev server endpoint.
// The dev server controls behavior (latency, failure modes) and records
// messages in an inbox visible in the dev UI.
type Sender struct {
	URL string // e.g. "http://localhost:8099/mail/send"
}

type sendReq struct {
	To      string
	Subject string
	Text    string
	HTML    string
}

func (s *Sender) Send(ctx context.Context, email string, content mail.Content) error {

	body, err := json.Marshal(sendReq{
		To:      email,
		Subject: content.Subject,
		Text:    content.TextBody,
		HTML:    content.HtmlBody,
	})
	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 mail: %w", err)
	}
	defer resp.Body.Close()

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