package mailfetch

import (
	"context"
	"errors"
	"log/slog"
	"testing"

	"gitea.lab.audasmedia.com.au/sam/email_agent/internal/config"
)

func TestGmailIDPrefersXGMMsgID(t *testing.T) {
	if got := gmailID(FetchResult{UID: 7, GmailMsgID: "555"}, 42); got != "555" {
		t.Errorf("gmailID() = %q, want 555", got)
	}
}

func TestGmailIDFallbackIsScopedToUIDValidity(t *testing.T) {
	if got := gmailID(FetchResult{UID: 7}, 42); got != "uid:42:7" {
		t.Errorf("gmailID() = %q, want uid:42:7", got)
	}
}

func TestJoinKeys(t *testing.T) {
	if got := joinKeys(map[string]struct{}{}); got != "none" {
		t.Errorf("joinKeys(empty) = %q, want none", got)
	}
	got := joinKeys(map[string]struct{}{"To": {}, "X-Pm-Original-To": {}})
	if got != "To,X-Pm-Original-To" {
		t.Errorf("joinKeys() = %q, want sorted keys", got)
	}
}

func TestFetchWithoutCredentials(t *testing.T) {
	cfg := &config.Config{Env: "test", IMAPHost: config.DefaultIMAPHost, IMAPPort: config.DefaultIMAPPort}
	f := NewFetcher(cfg, nil, slog.New(slog.DiscardHandler))
	if _, err := f.Fetch(context.Background()); !errors.Is(err, ErrNoCredentials) {
		t.Fatalf("Fetch() error = %v, want ErrNoCredentials", err)
	}
}