package services

import (
	"context"
	"errors"
	"testing"
	"time"

	"github.com/nexuscrm/shared/pkg/constants"
	"github.com/nexuscrm/shared/pkg/contract"
)

type auditLogExportContextKey struct{}

func TestAuditLogExportAsyncContextDropsUnsafeValuesAfterCancel(t *testing.T) {
	requestCtx, cancelRequest := context.WithCancel(context.WithValue(context.Background(), auditLogExportContextKey{}, "request-value"))
	requestCtx = context.WithValue(requestCtx, constants.ContextKeyTraceparent, "00-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bbbbbbbbbbbbbbbb-01")
	requestCtx = context.WithValue(requestCtx, constants.ContextKeyRequestID, "req-123")
	cancelRequest()

	asyncCtx, cancel := auditLogExportAsyncContext(requestCtx)
	defer cancel()

	if got := asyncCtx.Value(auditLogExportContextKey{}); got != nil {
		t.Fatalf("async context leaked unsafe value = %v, want nil", got)
	}
	if got := asyncCtx.Value(constants.ContextKeyTraceparent); got != "00-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-bbbbbbbbbbbbbbbb-01" {
		t.Fatalf("async context traceparent = %v, want parent traceparent", got)
	}
	if got := asyncCtx.Value(constants.ContextKeyRequestID); got != "req-123" {
		t.Fatalf("async context request_id = %v, want parent request ID", got)
	}
	if err := asyncCtx.Err(); err != nil {
		t.Fatalf("async context err = %v, want nil despite request cancellation", err)
	}
	if _, ok := asyncCtx.Deadline(); !ok {
		t.Fatal("async audit export context has no deadline")
	}
}

func TestAuditLogExportAsyncContextNilContextIsBounded(t *testing.T) {
	asyncCtx, cancel := auditLogExportAsyncContext(nil)
	defer cancel()

	deadline, ok := asyncCtx.Deadline()
	if !ok {
		t.Fatal("async audit export context has no deadline")
	}
	if time.Until(deadline) <= 0 {
		t.Fatalf("async audit export deadline is already expired: %v", deadline)
	}
}

func TestAuditLogContractUnavailableWithoutDB(t *testing.T) {
	if got := (&ServiceManager{}).AuditLogContract(); got != nil {
		t.Fatalf("empty AuditLogContract() = %v, want nil", got)
	}

	svc := &auditLogContract{}
	_, err := svc.QueryAuditLog(context.Background(), contract.AuditLogQueryRequest{}, nil)
	var auditErr *contract.AuditLogError
	if !errors.As(err, &auditErr) {
		t.Fatalf("err = %T %[1]v, want AuditLogError", err)
	}
	if auditErr.Kind != contract.AuditLogErrorUnavailable {
		t.Fatalf("kind = %s, want unavailable", auditErr.Kind)
	}
}