//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
 
namespace System.Activities.Validation
{
    using System;
    using System.Collections.Generic;
    using System.Collections.ObjectModel;
    using System.Runtime;
    using System.ComponentModel;
 
    public sealed class AssertValidation : NativeActivity
    {
        public AssertValidation()
        {
        }
        
        public InArgument<bool> Assertion
        {
            get;
            set;
        }
 
        public InArgument<string> Message
        {
            get;
            set;
        }
 
        [DefaultValue(null)]
        public InArgument<bool> IsWarning
        {
            get;
            set;
        }
 
        [DefaultValue(null)]
        public InArgument<string> PropertyName
        {
            get;
            set;
        }      
 
        protected override void CacheMetadata(NativeActivityMetadata metadata)
        {
            Collection<RuntimeArgument> arguments = new Collection<RuntimeArgument>();
 
            RuntimeArgument assertionArgument = new RuntimeArgument("Assertion", typeof(bool), ArgumentDirection.In);
            metadata.Bind(this.Assertion, assertionArgument);
            arguments.Add(assertionArgument);
 
            RuntimeArgument messageArgument = new RuntimeArgument("Message", typeof(string), ArgumentDirection.In);
            metadata.Bind(this.Message, messageArgument);
            arguments.Add(messageArgument);
 
            RuntimeArgument isWarningArgument = new RuntimeArgument("IsWarning", typeof(bool), ArgumentDirection.In, false);
            metadata.Bind(this.IsWarning, isWarningArgument);
            arguments.Add(isWarningArgument);
 
            RuntimeArgument propertyNameArgument = new RuntimeArgument("PropertyName", typeof(string), ArgumentDirection.In, false);
            metadata.Bind(this.PropertyName, propertyNameArgument);
            arguments.Add(propertyNameArgument);
 
            metadata.SetArgumentsCollection(arguments);
        }
 
        protected override void Execute(NativeActivityContext context)
        {
            if (!this.Assertion.Get(context))
            {
                bool isWarning = false;
                string propertyName = string.Empty;
                string errorCode = string.Empty;
 
                if (this.IsWarning != null)
                {
                    isWarning = this.IsWarning.Get(context);
                }
                
                if (this.PropertyName != null)
                {
                   propertyName = this.PropertyName.Get(context);            
                }
            
                Constraint.AddValidationError(context, new ValidationError(this.Message.Get(context), isWarning, propertyName));
            }
        }
    }
}