using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using EnVisage.Code;
using System.Globalization;
using System.Web.Script.Serialization;

namespace EnVisage.Models.ProjectDependencies
{
    public class ProjectDependencyModel : IBaseModel<ProjectDependency>
    {
        #region Enums
        /// <summary>
        /// Type of the project dependency.
        /// </summary>
        public enum ProjectDependencyType
        {
            /// <summary>
            /// Project A starts before project B start date = 0.
            /// </summary>
            [DisplayValue("Starts before")]
            StartsBefore = 0,
            /// <summary>
            /// Project A starts after project B end date = 1.
            /// </summary>
            //[DisplayValue("Starts after")]
            //StartsAfter = 1,
            /// <summary>
            /// Project A linked with project B = 2.
            /// </summary>
            [DisplayValue("Links to")]
            Link = 2,
        }
        #endregion

        #region Constructors

        public ProjectDependencyModel()
        {
            Id = Guid.Empty;
            SourceProjectId = Guid.Empty;
            TargetProjectId = Guid.Empty;
            DependencyType = ProjectDependencyType.StartsBefore;
        }

        #endregion

        #region Properties

        public Guid Id { get; set; }
        public Guid SourceProjectId { get; set; }
        public Guid TargetProjectId { get; set; }
        public short Type { get; set; }
        public ProjectDependencyType DependencyType
        {
            get
            {
                return (ProjectDependencyType)Type;
            }
            set
            {
                Type = (short)value;
            }
        }
        public string Name { get; set; }
        public long? StartDate { get; set; }
        public long? EndDate { get; set; }
        /// <summary>
        /// Gets or sets an unique identifier of the page to make sure changes on different tabs handled separately.
        /// </summary>
        public Guid SessionKey { get; set; }
        public int Level { get; set; }
		public bool IsReversed { get; set; }
		public Guid DisplayedProjectId { get; set; }
        public DependencyResolveModel ResolveConflicts { get; set; }

        #endregion

        #region Methods

        /// <summary>
        /// Casts a <see cref="ProjectDependency"/> obect to the object of type <see cref="ProjectDependencyModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="ProjectDependency"/> object.</param>
        /// <returns>A <see cref="ProjectDependencyModel"/> object filled with data from db.</returns>
        public static explicit operator ProjectDependencyModel(ProjectDependency obj)
        {
            if (obj == null)
                return null;

            var model = new ProjectDependencyModel
            {
                Id = obj.Id,
                Type = obj.Type,
                SourceProjectId = obj.SourceProjectId,
                TargetProjectId = obj.TargetProjectId
            };

            model.TrimStringProperties();
            return model;
        }

        /// <summary>
        /// Copies data from model to DAL object.
        /// </summary>
        /// <param name="obj">A target DAL object.</param>
        public void CopyTo(ProjectDependency obj)
        {
            if (obj == null)
                throw new ArgumentNullException("obj");

            obj.SourceProjectId = SourceProjectId;
            obj.TargetProjectId = TargetProjectId;
            obj.Type = Type;
        }

        #endregion
    }
}