package notify

import (
	"encoding/json"
	"io"
	"log"
	"net/http"
	"os"
	"testing"
)

type captureRT struct{ bodies []map[string]any }

func (c *captureRT) RoundTrip(r *http.Request) (*http.Response, error) {
	b, _ := io.ReadAll(r.Body)
	var m map[string]any
	_ = json.Unmarshal(b, &m)
	c.bodies = append(c.bodies, m)
	return &http.Response{StatusCode: 200, Body: io.NopCloser(nil), Header: http.Header{}}, nil
}

// `09` §3 decision 174: a household mail carries Reply-To = the operator's address (it is sent from monitoring@, and the
// kernel notice says "reply to this e-mail"); a mail to the operator carries none.
// COMPANION RED-PROOF (observed): drop the reply_to line in sendEmail → "household mail has no reply_to".
func TestReplyTo_HouseholdMailRepliesReachTheOperator(t *testing.T) {
	d := NewDispatcher(nil, "k", "monitoring@felhom.eu", "admin@felhom.eu", true, log.New(os.Stderr, "", 0))
	c := &captureRT{}
	d.httpClient = &http.Client{Transport: c}
	if err := d.sendEmail("household@example.com", "s", "b", nil); err != nil {
		t.Fatal(err)
	}
	if err := d.sendEmail("admin@felhom.eu", "s", "b", nil); err != nil {
		t.Fatal(err)
	}
	if got := c.bodies[0]["reply_to"]; got != "admin@felhom.eu" {
		t.Fatalf("household mail has no reply_to to the operator: %v", c.bodies[0])
	}
	if _, ok := c.bodies[1]["reply_to"]; ok {
		t.Fatalf("a mail to the operator must carry no reply_to: %v", c.bodies[1])
	}
	none := NewDispatcher(nil, "k", "monitoring@felhom.eu", "", true, log.New(os.Stderr, "", 0))
	if none.replyToFor("x@y") != "" {
		t.Fatal("no operator address → no reply_to")
	}
}