﻿// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

namespace SampleEphReceiver
{
    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Threading.Tasks;
    using Microsoft.Azure.EventHubs;
    using Microsoft.Azure.EventHubs.Processor;

    public class SimpleEventProcessor : IEventProcessor
    {
        public Task CloseAsync(PartitionContext context, CloseReason reason)
        {
            Console.WriteLine($"Processor Shutting Down. Partition '{context.PartitionId}', Reason: '{reason}'.");
            return Task.CompletedTask;
        }

        public Task OpenAsync(PartitionContext context)
        {
            Console.WriteLine($"SimpleEventProcessor initialized. Partition: '{context.PartitionId}'");
            return Task.CompletedTask;
        }

        public Task ProcessErrorAsync(PartitionContext context, Exception error)
        {
            Console.WriteLine($"Error on Partition: {context.PartitionId}, Error: {error.Message}");
            return Task.CompletedTask;
        }

        public Task ProcessEventsAsync(PartitionContext context, IEnumerable<EventData> messages)
        {
            foreach (var eventData in messages)
            {
                var data = Encoding.UTF8.GetString(eventData.Body.Array, eventData.Body.Offset, eventData.Body.Count);
                Console.WriteLine($"Message received. Partition: '{context.PartitionId}', Data: '{data}'");
            }

            return context.CheckpointAsync();
        }
    }
}
