using System;
using System.Diagnostics;
using System.Linq;
using JetBrains.Annotations;
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;
using Sda.ModelIdUpdater;

namespace Sda.Build.Tasks
{
    /// <summary>
    /// Kiegészít egy <c>XMI</c> modellt úgy, hogy minden elemnek egyedi <c>ID</c>-ja legyen.
    /// </summary>
    public sealed class UpdateIds : Task
    {
        /// <summary>
        /// A módosítandó <c>XML</c> modell állomány neve.
        /// </summary>
        [CanBeNull, Required]
        public string Input { get; set; }

        [CanBeNull]
        public ITaskItem[] Packages { get; set; }

        public override bool Execute()
        {
            Updater updater = new Updater();
            updater.LogMessageHandler += (sender, e) =>
            {
                if (e == null
                    ||
                    string.IsNullOrWhiteSpace(e.Message))
                {
                    return;
                }
                if (Packages != null
                    &&
                    Packages.Length > 0
                    &&
                    !string.IsNullOrWhiteSpace(e.Package)
                    &&
                    !Packages.Any(p => string.Equals(p.ItemSpec, e.Package, StringComparison.OrdinalIgnoreCase)))
                {
                    return;
                }
                switch (e.EventType)
                {
                    case TraceEventType.Error:
                        this.LogError(e.Message);
                        break;
                    case TraceEventType.Warning:
                        this.LogWarning(e.Message);
                        break;
                    default:
                        this.LogInfo(e.Message);
                        break;
                }
            };
            updater.UpdateIds(Input);
            return true;
        }
    }
}