using DotNetToolkit;
using EntityFrameworkCore.BootKit;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;

namespace BotSharp.Core.Intents
{
    /// <summary>
    /// Intent Table
    /// </summary>
    [Table("Bot_Intent")]
    public class Intent : DbRecord, IDbRecord
    {
        [Required]
        [StringLength(36)]
        public String AgentId { get; set; }

        [MaxLength(64)]
        public String Name { get; set; }

        [MaxLength(256)]
        public String Description { get; set; }

        [ForeignKey("IntentId")]
        public List<IntentInputContext> Contexts { get; set; }

        [ForeignKey("IntentId")]
        public List<IntentEvent> Events { get; set; }
        
        /// <summary>
        /// Get input contexts hash
        /// </summary>
        [NotMapped]
        public String ContextHash
        {
            get
            {
                return Contexts == null || Contexts.Count == 0
                    ? Guid.Empty.ToString("N")
                    : $"{String.Join(',', Contexts.OrderBy(x => x.Name).Select(x => x.Name))}".GetMd5Hash();
            }
        }

        [ForeignKey("IntentId")]
        public List<IntentExpression> UserSays { get; set; }

        [ForeignKey("IntentId")]
        public List<IntentResponse> Responses { get; set; }
    }
}