package acl

import (
	"github.com/stretchr/testify/require"
	"regexp"
	"testing"
)

func RequirePermissionDeniedError(t testing.TB, err error, _ Authorizer, _ *AuthorizerContext, resource Resource, accessLevel AccessLevel, resourceID string) {
	t.Helper()
	if err == nil {
		t.Fatal("An error is expected but got nil.")
	}
	if v, ok := err.(PermissionDeniedError); ok {
		require.Equal(t, v.Resource, resource)
		require.Equal(t, v.AccessLevel, accessLevel)
		require.Equal(t, v.ResourceID.Name, resourceID)
	} else {
		t.Fatalf("Expected a permission denied error got %T %vp", err, err)
	}
}

func RequirePermissionDeniedMessage(t testing.TB, msg string, auth Authorizer, _ *AuthorizerContext, resource Resource, accessLevel AccessLevel, resourceID string) {
	require.NotEmpty(t, msg, "expected non-empty error message")

	var resourceIDFound string
	if auth == nil {
		expr := "^Permission denied" + `: provided accessor lacks permission '(\S*):(\S*)' on (.*)\s*$`
		re, _ := regexp.Compile(expr)
		matched := re.FindStringSubmatch(msg)

		require.Equal(t, string(resource), matched[1], "resource")
		require.Equal(t, accessLevel.String(), matched[2], "access level")
		resourceIDFound = matched[3]
	} else {
		expr := "^Permission denied" + `: accessor '(\S*)' lacks permission '(\S*):(\S*)' on (.*)\s*$`
		re, _ := regexp.Compile(expr)
		matched := re.FindStringSubmatch(msg)

		require.Equal(t, auth, matched[1], "auth")
		require.Equal(t, string(resource), matched[2], "resource")
		require.Equal(t, accessLevel.String(), matched[3], "access level")
		resourceIDFound = matched[4]
	}
	// AuthorizerContext information should be checked here
	require.Contains(t, resourceIDFound, resourceID, "resource id")
}