using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CDP
{
    public class AuditDocument
    {
        public string id
        {
            get
            {
                Debug.Assert(Records.Count > 0);
                AuditRecord ar = Records[0];
                return GenPartitionKey(DocId, ar.EventTime, Index);
            }
        }
        public string DocId { get; set; }
        public int Index { get; set; }
        public List<AuditRecord> Records { get; set; }

        public AuditDocument()
        {
            DocId = string.Empty;
            Index = 0;
            Records = new List<AuditRecord>();
        }

        public static string GenRootPartitionKey(string id, DateTime dt)
        {
            return string.Format($"{id}-{dt.Year}-{dt.DayOfYear}");
        }

        public static string GenPartitionKey(string id, DateTime dt, int index = 0)
        {
            return GenRootPartitionKey(id, dt) + string.Format($"-{index}");
        }
    }

    public class UserAuditDocument : AuditDocument
    {
        public string UserId { get; set; }
        public string id
        {
            get
            {
                Debug.Assert(Records.Count > 0);
                AuditRecord ar = Records[0];
                return GenPartitionKey(UserId, ar.EventTime, Index);
            }
        }
    }
    public class GroupAuditDocument : AuditDocument
    {
        public string GroupId { get; set; }
        public string id
        {
            get
            {
                Debug.Assert(Records.Count > 0);
                AuditRecord ar = Records[0];
                return GenPartitionKey(GroupId, ar.EventTime, Index);
            }
        }
    }
    public class TenantAuditDocument : AuditDocument
    {
        public string AppKey { get; set; }
        public string id
        {
            get
            {
                Debug.Assert(Records.Count > 0);
                AuditRecord ar = Records[0];
                return GenPartitionKey(AppKey, ar.EventTime, Index);
            }
        }
    }

    public class AuditRecord
    {
        public string AppKey { get; set; }
        public string FileId { get; set; }
        public string FileName { get; set; }
        public string UserId { get; set; }
        public string GroupId { get; set; }
        public string Action { get; set; }
        public string Message { get; set; }
        public DateTime EventTime { get; set; }
        public virtual string id { get; }

        public AuditRecord()
        {
            EventTime = DateTime.UtcNow;
        }

        public AuditRecord(string appKey, string fileId, string fileName, string userId, string groupId, string action, string message)
        {
            AppKey = appKey;
            FileId = fileId;
            FileName = fileName;
            UserId = userId;
            GroupId = groupId;
            Action = action;
            Message = message;
            EventTime = DateTime.UtcNow;
        }

        public int CalculateRecordSize()
        {
            int size = 0;

            // Calculate the size of each property
            size += 16; // sizeof(DateTime);                // EventTime
            size += Encoding.UTF8.GetByteCount(UserId);     // UserId
            size += sizeof(int);                          // EventType
            size += Encoding.UTF8.GetByteCount(Message);    // Message
            return size;
        }

    }
    public class FileAuditRecord : AuditRecord
    {
        public override string id
        {
            get
            {
                return FileId;
            }
        }

        public FileAuditRecord() : base()
        {

        }

        public FileAuditRecord(string appKey, string fileId, string fileName, string userId, string groupId, string action, string message) : base(appKey, fileId, fileName, userId, groupId, action, message)
        {
        }

    }
    public class TenantAuditRecord : AuditRecord
    {

        public override string id
        {
            get
            {
                return AppKey;
            }
        }

        public TenantAuditRecord() : base()
        {

        }

        public TenantAuditRecord(string appKey, string fileId, string fileName, string userId, string groupId, string action, string message) : base(appKey, fileId, fileName, userId, groupId, action, message)
        {
        }

    }

    public class UserAuditRecord : AuditRecord
    {

        public override string id
        {
            get
            {
                return UserId;
            }
        }

        public UserAuditRecord() : base()
        {

        }

        public UserAuditRecord(string appKey, string fileId, string fileName, string userId, string groupId, string action, string message) : base(appKey, fileId, fileName, userId, groupId, action, message)
        {
        }

    }

    public class GroupAuditRecord : AuditRecord
    {

        public override string id
        {
            get
            {
                return GroupId;
            }
        }

        public GroupAuditRecord() : base()
        {

        }

        public GroupAuditRecord(string appKey, string fileId, string fileName, string userId, string groupId, string action, string message) : base(appKey, fileId, fileName, userId, groupId, action, message)
        {
        }

    }

    public class MetadataDocument
    {
        public string id { get; set; }
        public List<string> PartitionKeys { get; set; }

        public MetadataDocument()
        {
            PartitionKeys = new List<string>();
            id = id + "-meta";
        }
        public string GetLatestKeyForDay(DateTime dt)
        {
            string rootKey = AuditDocument.GenRootPartitionKey(id, dt);
            List<string> dayKeys = new List<string>();
            PartitionKeys.Sort();
            foreach (string key in PartitionKeys)
            {
                var partitionKeyParts = key.Split('-');
                var year = int.Parse(partitionKeyParts[1]);
                var dayOfYear = int.Parse(partitionKeyParts[2]);
                if (year == dt.Year && dayOfYear == dt.DayOfYear)
                {
                    dayKeys.Add(key);
                }
            }

            if (dayKeys.Count == 0)
                return AuditDocument.GenPartitionKey(id, dt);

            return dayKeys.Last();
        }
    }

}