using System;
using System.Collections.Generic;
using System.Text;

namespace HanvonF710XAttendanceService
{
    internal sealed class DbToDeviceFailedEmployee
    {
        public string SerialNumber { get; set; } = "";
        public string Name { get; set; } = "";
        public string Department { get; set; } = "";
        public string MachineId { get; set; } = "";
        public string MachineIp { get; set; } = "";
        public string MachineType { get; set; } = "";
        public string Reason { get; set; } = "";
    }

    internal sealed class DbToDeviceMissingMappingEmployee
    {
        public string SerialNumber { get; set; } = "";
        public string MachineId { get; set; } = "";
        public string MachineIp { get; set; } = "";
        public string MachineType { get; set; } = "";
    }

    internal sealed class DbToDeviceTargetSummary
    {
        public string MachineId { get; set; } = "";
        public string MachineIp { get; set; } = "";
        public string MachineType { get; set; } = "";
        public int AlreadyRegistered { get; set; }
        public int NewlyRegistered { get; set; }
        public int Failed { get; set; }
        public List<DbToDeviceFailedEmployee> FailedEmployees { get; } = new List<DbToDeviceFailedEmployee>();
        public List<DbToDeviceMissingMappingEmployee> MissingMappings { get; } = new List<DbToDeviceMissingMappingEmployee>();

        public void AddFailure(string serial, string name, string department, string reason)
        {
            Failed++;
            FailedEmployees.Add(new DbToDeviceFailedEmployee
            {
                SerialNumber = serial ?? "",
                Name = name ?? "",
                Department = department ?? "",
                MachineId = MachineId,
                MachineIp = MachineIp,
                MachineType = MachineType,
                Reason = reason ?? ""
            });
        }

        public void AddMissingMapping(string serial)
        {
            MissingMappings.Add(new DbToDeviceMissingMappingEmployee
            {
                SerialNumber = serial ?? "",
                MachineId = MachineId,
                MachineIp = MachineIp,
                MachineType = MachineType
            });
        }

        public string FormatReport()
        {
            var sb = new StringBuilder();
            sb.AppendLine("=================================");
            sb.AppendLine("DB_TO_DEVICE SUMMARY");
            sb.AppendLine("=================================");
            sb.AppendLine();
            sb.AppendLine("Target:");
            sb.AppendLine("Machine ID: " + MachineId);
            sb.AppendLine("IP: " + MachineIp);
            sb.AppendLine("Type: " + MachineType);
            sb.AppendLine();
            sb.AppendLine("Already Registered: " + AlreadyRegistered);
            sb.AppendLine();
            sb.AppendLine("Newly Registered: " + NewlyRegistered);
            sb.AppendLine();
            sb.AppendLine("Failed: " + Failed);
            sb.AppendLine();
            sb.AppendLine("Missing Employee Mapping: " + MissingMappings.Count);
            if (MissingMappings.Count > 0)
            {
                sb.AppendLine();
                foreach (var miss in MissingMappings)
                {
                    sb.AppendLine("Serial: " + miss.SerialNumber);
                    sb.AppendLine("Machine ID: " + miss.MachineId);
                    sb.AppendLine("Machine IP: " + miss.MachineIp);
                    sb.AppendLine("Machine Type: " + miss.MachineType);
                    sb.AppendLine("Reason: No employee row for serial_number_int");
                    sb.AppendLine();
                }
            }
            else
            {
                sb.AppendLine();
            }

            if (FailedEmployees.Count > 0)
            {
                sb.AppendLine("Failed Employees:");
                sb.AppendLine();
                foreach (var fail in FailedEmployees)
                {
                    sb.AppendLine("Serial: " + fail.SerialNumber);
                    sb.AppendLine("Name: " + fail.Name);
                    sb.AppendLine("Department: " + fail.Department);
                    sb.AppendLine("Machine ID: " + fail.MachineId);
                    sb.AppendLine("Machine IP: " + fail.MachineIp);
                    sb.AppendLine("Machine Type: " + fail.MachineType);
                    sb.AppendLine("Reason: " + fail.Reason);
                    sb.AppendLine();
                }
            }

            return sb.ToString().TrimEnd() + Environment.NewLine;
        }
    }

    internal static class DbToDeviceSkipLogic
    {
        public static bool ShouldSkipAlreadyRegistered(ISet<string> registeredSerials, string employeeSerial)
        {
            if (registeredSerials == null || string.IsNullOrWhiteSpace(employeeSerial))
            {
                return false;
            }

            return registeredSerials.Contains(employeeSerial.Trim());
        }
    }
}