package settings

import (
	"testing"
	"time"
)

func TestAuthAuditRoundTripAndCap(t *testing.T) {
	dir := t.TempDir()

	store, err := LoadAuthAuditOrEmpty(dir)
	if err != nil {
		t.Fatalf("LoadAuthAuditOrEmpty: %v", err)
	}
	if len(store.Events) != 0 {
		t.Fatalf("expected empty, got %d", len(store.Events))
	}

	event := AuthAuditEvent{
		ID:       "evt-1",
		At:       time.Now().UTC(),
		Action:   "login",
		Outcome:  AuthAuditOutcomeSuccess,
		Category: AuthAuditCategoryAuth,
		Actor:    "admin",
	}
	if err := AppendAuthAuditEvent(dir, event); err != nil {
		t.Fatalf("AppendAuthAuditEvent: %v", err)
	}

	loaded, err := LoadAuthAudit(dir)
	if err != nil {
		t.Fatalf("LoadAuthAudit: %v", err)
	}
	if len(loaded.Events) != 1 || loaded.Events[0].Action != "login" {
		t.Fatalf("loaded = %+v", loaded)
	}
	if loaded.Events[0].Outcome != AuthAuditOutcomeSuccess {
		t.Fatalf("outcome = %q", loaded.Events[0].Outcome)
	}
}

func TestAppendAuthAuditEventTrimsToCap(t *testing.T) {
	dir := t.TempDir()
	originalCap := MaxAuthAuditEvents
	store := AuthAuditStore{Events: make([]AuthAuditEvent, 0, MaxAuthAuditEvents+5)}
	for index := 0; index < MaxAuthAuditEvents+5; index++ {
		store.Events = append(store.Events, AuthAuditEvent{
			ID:       "evt",
			At:       time.Now().UTC(),
			Action:   "login",
			Outcome:  AuthAuditOutcomeSuccess,
			Category: AuthAuditCategoryAuth,
			Actor:    "admin",
			Detail:   string(rune('a' + (index % 26))),
		})
	}
	if err := SaveAuthAudit(dir, store); err != nil {
		t.Fatalf("SaveAuthAudit: %v", err)
	}
	if err := AppendAuthAuditEvent(dir, AuthAuditEvent{
		ID:       "newest",
		At:       time.Now().UTC(),
		Action:   "logout",
		Outcome:  AuthAuditOutcomeSuccess,
		Category: AuthAuditCategoryAuth,
		Actor:    "admin",
	}); err != nil {
		t.Fatalf("AppendAuthAuditEvent: %v", err)
	}
	loaded, err := LoadAuthAudit(dir)
	if err != nil {
		t.Fatalf("LoadAuthAudit: %v", err)
	}
	if len(loaded.Events) != originalCap {
		t.Fatalf("len = %d, want %d", len(loaded.Events), originalCap)
	}
	if loaded.Events[len(loaded.Events)-1].ID != "newest" {
		t.Fatalf("last id = %q", loaded.Events[len(loaded.Events)-1].ID)
	}
}