using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using EnVisage.Code;
using System.Linq;

namespace EnVisage.Models
{
    public class WorkWeekModel : IBaseModel<WorkWeek>
    {
        public Guid Id { get; set; }

        [Required]
        [MaxLength(100)]
		[Display(Name = "Name")]
		public string Name { get; set; }

        [Display(Name = "Days Of Week")]
        public string DaysOfWeek { get; set; }

        public bool Monday { get; set; }
        public bool Tuesday { get; set; }
        public bool Wednesday { get; set; }
        public bool Thursday { get; set; }
        public bool Friday { get; set; }
        public bool Saturday { get; set; }
        public bool Sunday { get; set; }

        [Display(Name = "Make Default Work Week")]
        public bool IsDefault { get; set; }

        public bool IsSystem { get; set; }
        public bool CanBeDeleted { get; set; }
        /// <summary>
        /// Casts a <see cref="Type"/> obect to the object of type <see cref="TypeModel"/>.
        /// </summary>
        /// <param name="obj">A <see cref="Type"/> object.</param>
        /// <returns>A <see cref="TypeModel"/> object filled with data from db.</returns>
        public static explicit operator WorkWeekModel(WorkWeek obj)
        {
            if (obj == null)
                return null;
            var model = new WorkWeekModel
            {
                Id = obj.Id,
                Name = obj.Name,
                Monday = obj.Monday,
                Tuesday = obj.Tuesday,
                Wednesday = obj.Wednesday,
                Thursday = obj.Thursday,
                Friday = obj.Friday,
                Saturday = obj.Saturday,
                Sunday = obj.Sunday,
                IsDefault = obj.IsDefault,
                IsSystem = obj.IsSystem
            };
            model.DaysOfWeek = getDaysOfWeek(model, "Monday", false);
            model.TrimStringProperties();
            return model;
        }

        public static string getDaysOfWeek(WorkWeekModel obj, string day, bool interval)
        {
            var result = string.Empty;
            switch (day)
            {
                case "Tuesday":
                    if (obj.Tuesday)
                    {
                        if (!obj.Wednesday)
                        {
                            result = "Tuesday, ";
                            interval = false;
                        }
                        else {
                            if (!interval)
                                result = "Tuesday - ";
                            interval = true;
                        }
                    }
                    result += getDaysOfWeek(obj, "Wednesday", interval);
                    break;

                case "Wednesday":
                    if (obj.Wednesday)
                    {
                        if (!obj.Thursday)
                        {
                            result = "Wednesday, ";
                            interval = false;
                        }
                        else {
                            if (!interval)
                                result = "Wednesday - ";
                            interval = true;
                        }
                    }
                    result += getDaysOfWeek(obj, "Thursday", interval);
                    break;

                case "Thursday":
                    if (obj.Thursday)
                    {
                        if (!obj.Friday)
                        {
                            result = "Thursday, ";
                            interval = false;
                        }
                        else {
                            if (!interval)
                                result = "Thursday - ";
                            interval = true;
                        }
                    }
                    result += getDaysOfWeek(obj, "Friday", interval);
                    break;

                case "Friday":
                    if (obj.Friday)
                    {
                        if (!obj.Saturday)
                        {
                            result = "Friday, ";
                            interval = false;
                        }
                        else {
                            if (!interval)
                                result = "Friday - ";
                            interval = true;
                        }
                    }
                    result += getDaysOfWeek(obj, "Saturday", interval);
                    break;

                case "Saturday":
                    if (obj.Saturday)
                    {
                        if (!obj.Sunday)
                        {
                            result = "Saturday";
                            interval = false;
                        }
                        else {
                            if (!interval)
                                result = "Saturday - Sunday";
                            else
                                result = "Sunday";
                        }
                    }
                    else {
                        if (obj.Sunday)
                        {
                            result = "Sunday";
                        }
                        }
                    break;

                default: // case "Monday":
                    if (obj.Monday)
                    {
                        if (!obj.Tuesday)
                        {
                            result = "Monday, ";
                            interval = false;
                        }
                        else {
                            result = "Monday - ";
                            interval = true;
                        }
                    }
                    result += getDaysOfWeek(obj, "Tuesday", interval);
                    break;

            }
            
            return (string.IsNullOrEmpty( day) ?  result.TrimEnd(new char[] {' ',','}) : result);
        }

        /// <summary>
        /// Copies data from model to DAL object.
        /// </summary>
        /// <param name="dbObj">A target DAL object.</param>
        public void CopyTo(WorkWeek dbObj)
        {
            if (dbObj == null)
                throw new ArgumentNullException();
            dbObj.Name = Name;
            dbObj.Monday = Monday;
            dbObj.Tuesday = Tuesday;
            dbObj.Wednesday = Wednesday;
            dbObj.Thursday = Thursday;
            dbObj.Friday = Friday;
            dbObj.Saturday = Saturday;
            dbObj.Sunday = Sunday;
            dbObj.IsSystem = IsSystem;
        }
    }
}