using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace bnhtrade.Core.Model.Account
{
    public class Journal : IValidatableObject
    {
        internal Journal(int journalId, Core.Model.Account.JournalType type, List<Post> posts, DateTime entryDate, DateTime postDate, DateTime lastModifed, bool isLocked)
        {
            JournalId = journalId;
            Type = type;
            Posts = posts;
            EntryDate = entryDate;
            PostDate = postDate;
            LastModified = lastModifed;
            IsLocked = isLocked;
        }

        public int JournalId { get; private set; }
        public Core.Model.Account.JournalType Type { get; private set; }
        public List<Post> Posts { get; private set; } = new List<Post>();
        public DateTime EntryDate { get; private set; }
        public DateTime PostDate { get; private set; }
        public DateTime LastModified { get;private set; }
        public bool IsLocked { get; private set; }

        public class Post
        {
            internal Post(int postId, Core.Model.Account.Account account, decimal amountGbp)
            { 
                PostId = postId;
                Account = account;
                AmountGbp = amountGbp;
            }

            public int PostId { get; private set; }
            public Core.Model.Account.Account Account { get; private set; }
            public decimal AmountGbp { get; private set; }
        }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            var result = new List<ValidationResult>();

            // get total of posts
            decimal postTotal = 0;
            foreach (var  post in Posts)
            {
                postTotal = postTotal + post.AmountGbp;
            }
            if (postTotal != 0)
            {
                result.Add(new ValidationResult("Account journal posts do not equal zero"));
            }

            throw new NotImplementedException();
            return result;
        }
    }
}