using System;
using System.ComponentModel.DataAnnotations;
using Bit.Core.Utilities;
using Bit.Core.Models.Table;
using Bit.Core.Enums;
using Newtonsoft.Json;
using System.Collections.Generic;
using System.Linq;
using Core.Models.Data;
using Bit.Core.Models.Data;
using Newtonsoft.Json.Linq;

namespace Bit.Core.Models.Api
{
    public class CipherRequestModel
    {
        public CipherType Type { get; set; }

        [StringLength(36)]
        public string OrganizationId { get; set; }
        public string FolderId { get; set; }
        public bool Favorite { get; set; }
        [Required]
        [EncryptedString]
        [EncryptedStringLength(1000)]
        public string Name { get; set; }
        [EncryptedString]
        [EncryptedStringLength(10000)]
        public string Notes { get; set; }
        public IEnumerable<CipherFieldModel> Fields { get; set; }
        public IEnumerable<CipherPasswordHistoryModel> PasswordHistory { get; set; }
        [Obsolete]
        public Dictionary<string, string> Attachments { get; set; }
        // TODO: Rename to Attachments whenever the above is finally removed.
        public Dictionary<string, CipherAttachmentModel> Attachments2 { get; set; }

        public CipherLoginModel Login { get; set; }
        public CipherCardModel Card { get; set; }
        public CipherIdentityModel Identity { get; set; }
        public CipherSecureNoteModel SecureNote { get; set; }

        public CipherDetails ToCipherDetails(Guid userId, bool allowOrgIdSet = true)
        {
            var hasOrgId = !string.IsNullOrWhiteSpace(OrganizationId);
            var cipher = new CipherDetails
            {
                Type = Type,
                UserId = !hasOrgId ? (Guid?)userId : null,
                OrganizationId = allowOrgIdSet && hasOrgId ? new Guid(OrganizationId) : (Guid?)null,
                Edit = true
            };
            ToCipherDetails(cipher);
            return cipher;
        }

        public CipherDetails ToCipherDetails(CipherDetails existingCipher)
        {
            existingCipher.FolderId = string.IsNullOrWhiteSpace(FolderId) ? null : (Guid?)new Guid(FolderId);
            existingCipher.Favorite = Favorite;
            ToCipher(existingCipher);
            return existingCipher;
        }

        public Cipher ToCipher(Cipher existingCipher)
        {
            switch(existingCipher.Type)
            {
                case CipherType.Login:
                    var loginObj = JObject.FromObject(new CipherLoginData(this),
                        new JsonSerializer { NullValueHandling = NullValueHandling.Ignore });
                    loginObj[nameof(CipherLoginData.Uri)]?.Parent?.Remove();
                    existingCipher.Data = loginObj.ToString(Formatting.None);
                    break;
                case CipherType.Card:
                    existingCipher.Data = JsonConvert.SerializeObject(new CipherCardData(this),
                        new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
                    break;
                case CipherType.Identity:
                    existingCipher.Data = JsonConvert.SerializeObject(new CipherIdentityData(this),
                        new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
                    break;
                case CipherType.SecureNote:
                    existingCipher.Data = JsonConvert.SerializeObject(new CipherSecureNoteData(this),
                        new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
                    break;
                default:
                    throw new ArgumentException("Unsupported type: " + nameof(Type) + ".");
            }

            var hasAttachments2 = (Attachments2?.Count ?? 0) > 0;
            var hasAttachments = (Attachments?.Count ?? 0) > 0;

            if(!hasAttachments2 && !hasAttachments)
            {
                return existingCipher;
            }

            var attachments = existingCipher.GetAttachments();
            if((attachments?.Count ?? 0) == 0)
            {
                return existingCipher;
            }

            if(hasAttachments2)
            {
                foreach(var attachment in attachments.Where(a => Attachments2.ContainsKey(a.Key)))
                {
                    var attachment2 = Attachments2[attachment.Key];
                    attachment.Value.FileName = attachment2.FileName;
                    attachment.Value.Key = attachment2.Key;
                }
            }
            else if(hasAttachments)
            {
                foreach(var attachment in attachments.Where(a => Attachments.ContainsKey(a.Key)))
                {
                    attachment.Value.FileName = Attachments[attachment.Key];
                    attachment.Value.Key = null;
                }
            }

            existingCipher.SetAttachments(attachments);
            return existingCipher;
        }

        public Cipher ToOrganizationCipher()
        {
            if(string.IsNullOrWhiteSpace(OrganizationId))
            {
                throw new ArgumentNullException(nameof(OrganizationId));
            }

            return ToCipher(new Cipher
            {
                Type = Type,
                OrganizationId = new Guid(OrganizationId)
            });
        }

        public CipherDetails ToOrganizationCipherDetails(Guid orgId)
        {
            return ToCipherDetails(new CipherDetails
            {
                Type = Type,
                OrganizationId = orgId,
                Edit = true
            });
        }
    }

    public class CipherWithIdRequestModel : CipherRequestModel
    {
        [Required]
        public Guid? Id { get; set; }
    }

    public class CipherCreateRequestModel : IValidatableObject
    {
        public IEnumerable<Guid> CollectionIds { get; set; }
        [Required]
        public CipherRequestModel Cipher { get; set; }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if(!string.IsNullOrWhiteSpace(Cipher.OrganizationId) && (!CollectionIds?.Any() ?? true))
            {
                yield return new ValidationResult("You must select at least one collection.",
                   new string[] { nameof(CollectionIds) });
            }
        }
    }

    public class CipherShareRequestModel : IValidatableObject
    {
        [Required]
        public IEnumerable<string> CollectionIds { get; set; }
        [Required]
        public CipherRequestModel Cipher { get; set; }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if(string.IsNullOrWhiteSpace(Cipher.OrganizationId))
            {
                yield return new ValidationResult("Cipher OrganizationId is required.",
                    new string[] { nameof(Cipher.OrganizationId) });
            }

            if(!CollectionIds?.Any() ?? true)
            {
                yield return new ValidationResult("You must select at least one collection.",
                    new string[] { nameof(CollectionIds) });
            }
        }
    }

    public class CipherCollectionsRequestModel
    {
        [Required]
        public IEnumerable<string> CollectionIds { get; set; }
    }

    public class CipherBulkDeleteRequestModel
    {
        [Required]
        public IEnumerable<string> Ids { get; set; }
    }

    public class CipherBulkMoveRequestModel
    {
        [Required]
        public IEnumerable<string> Ids { get; set; }
        public string FolderId { get; set; }
    }

    public class CipherBulkShareRequestModel : IValidatableObject
    {
        [Required]
        public IEnumerable<string> CollectionIds { get; set; }
        [Required]
        public IEnumerable<CipherWithIdRequestModel> Ciphers { get; set; }

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if(!Ciphers?.Any() ?? true)
            {
                yield return new ValidationResult("You must select at least one cipher.",
                    new string[] { nameof(Ciphers) });
            }
            else
            {
                var allHaveIds = true;
                var organizationIds = new HashSet<string>();
                foreach(var c in Ciphers)
                {
                    organizationIds.Add(c.OrganizationId);
                    if(allHaveIds)
                    {
                        allHaveIds = !(!c.Id.HasValue || string.IsNullOrWhiteSpace(c.OrganizationId));
                    }
                }

                if(!allHaveIds)
                {
                    yield return new ValidationResult("All Ciphers must have an Id and OrganizationId.",
                        new string[] { nameof(Ciphers) });
                }
                else if(organizationIds.Count != 1)
                {
                    yield return new ValidationResult("All ciphers must be for the same organization.");
                }
            }

            if(!CollectionIds?.Any() ?? true)
            {
                yield return new ValidationResult("You must select at least one collection.",
                    new string[] { nameof(CollectionIds) });
            }
        }
    }
}