package mail_test

import (
	"context"
	"testing"

	"git.lohmar.co.uk/cclohmar/NextMyDay/internal/core/mail"
)

// TestFakeRecordsAndFilters: the test seam records every message and can filter
// by recipient (case-insensitive).
func TestFakeRecordsAndFilters(t *testing.T) {
	f := mail.NewFake()
	ctx := context.Background()

	if err := f.Send(ctx, mail.Message{To: "a@example.com", Subject: "one", Body: "hi"}); err != nil {
		t.Fatalf("Send: %v", err)
	}
	if err := f.Send(ctx, mail.Message{To: "B@Example.com", Subject: "two"}); err != nil {
		t.Fatalf("Send: %v", err)
	}

	if got := len(f.Sent()); got != 2 {
		t.Fatalf("Sent len = %d, want 2", got)
	}
	toB := f.To("b@example.com")
	if len(toB) != 1 || toB[0].Subject != "two" {
		t.Errorf("To(b@example.com) = %+v, want the second message", toB)
	}
	if len(f.To("nobody@example.com")) != 0 {
		t.Error("To returned a message for an unknown recipient")
	}
}

// TestNopSend: the unconfigured fallback discards silently.
func TestNopSend(t *testing.T) {
	if err := (mail.Nop{}).Send(context.Background(), mail.Message{To: "x@example.com"}); err != nil {
		t.Errorf("Nop.Send = %v, want nil", err)
	}
}

// TestSMTPRequiresHost: the SMTP mailer fails closed without a host.
func TestSMTPRequiresHost(t *testing.T) {
	m := mail.NewSMTP("", 25, "", "", "myday@example.com")
	if err := m.Send(context.Background(), mail.Message{To: "x@example.com"}); err == nil {
		t.Error("SMTP.Send with no host = nil, want an error")
	}
}