using System;
using System.Collections.Generic;

namespace HanvonF710XAttendanceService
{
    internal static class DbToDeviceSummaryTests
    {
        public static int RunAll()
        {
            int failed = 0;
            failed += Run("existing user is skipped", TestExistingUserSkipped);
            failed += Run("missing user is enrolled", TestMissingUserEnrolled);
            failed += Run("summary contains required fields", TestSummaryContainsRequiredFields);
            failed += Run("multiple machines produce separate summaries", TestMultipleMachineSummaries);
            return failed;
        }

        private static int Run(string name, Func<bool> test)
        {
            try
            {
                if (!test())
                {
                    Console.WriteLine("FAIL: " + name);
                    return 1;
                }

                Console.WriteLine("PASS: " + name);
                return 0;
            }
            catch (Exception ex)
            {
                Console.WriteLine("FAIL: " + name + " err=" + ex.Message);
                return 1;
            }
        }

        private static bool TestExistingUserSkipped()
        {
            var registered = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "15057", "6401" };
            return DbToDeviceSkipLogic.ShouldSkipAlreadyRegistered(registered, "15057")
                && DbToDeviceSkipLogic.ShouldSkipAlreadyRegistered(registered, " 6401 ")
                && !DbToDeviceSkipLogic.ShouldSkipAlreadyRegistered(registered, "99999");
        }

        private static bool TestMissingUserEnrolled()
        {
            var registered = new HashSet<string>(StringComparer.OrdinalIgnoreCase) { "15057" };
            var summary = new DbToDeviceTargetSummary
            {
                MachineId = "105",
                MachineIp = "192.168.90.223",
                MachineType = "HANVON"
            };

            // Existing -> skip
            if (DbToDeviceSkipLogic.ShouldSkipAlreadyRegistered(registered, "15057"))
            {
                summary.AlreadyRegistered++;
            }

            // Missing -> enroll
            if (!DbToDeviceSkipLogic.ShouldSkipAlreadyRegistered(registered, "99999"))
            {
                summary.NewlyRegistered++;
            }

            return summary.AlreadyRegistered == 1 && summary.NewlyRegistered == 1;
        }

        private static bool TestSummaryContainsRequiredFields()
        {
            var summary = new DbToDeviceTargetSummary
            {
                MachineId = "105",
                MachineIp = "192.168.90.223",
                MachineType = "HANVON",
                AlreadyRegistered = 620,
                NewlyRegistered = 30
            };
            summary.AddMissingMapping("88888");
            summary.AddFailure("15057", "John Smith", "Production", "Employee photo not found");
            summary.AddFailure("6401", "ABC XYZ", "Quality", "DUPLICATE_FACE existing_device_id=6400");

            string report = summary.FormatReport();
            return report.Contains("DB_TO_DEVICE SUMMARY")
                && report.Contains("Machine ID: 105")
                && report.Contains("IP: 192.168.90.223")
                && report.Contains("Type: HANVON")
                && report.Contains("Already Registered: 620")
                && report.Contains("Newly Registered: 30")
                && report.Contains("Failed: 2")
                && report.Contains("Missing Employee Mapping: 1")
                && report.Contains("Serial: 15057")
                && report.Contains("Name: John Smith")
                && report.Contains("Department: Production")
                && report.Contains("Reason: Employee photo not found")
                && report.Contains("DUPLICATE_FACE existing_device_id=6400");
        }

        private static bool TestMultipleMachineSummaries()
        {
            var a = new DbToDeviceTargetSummary
            {
                MachineId = "105",
                MachineIp = "192.168.90.223",
                MachineType = "HANVON",
                AlreadyRegistered = 10,
                NewlyRegistered = 2
            };
            var b = new DbToDeviceTargetSummary
            {
                MachineId = "106",
                MachineIp = "10.0.1.7",
                MachineType = "HANVON",
                AlreadyRegistered = 5,
                NewlyRegistered = 7
            };
            b.AddFailure("6401", "ABC XYZ", "Quality", "DUPLICATE_FACE existing_device_id=6400");

            string reportA = a.FormatReport();
            string reportB = b.FormatReport();

            return reportA.Contains("Machine ID: 105")
                && reportA.Contains("IP: 192.168.90.223")
                && reportA.Contains("Already Registered: 10")
                && reportA.Contains("Newly Registered: 2")
                && !reportA.Contains("10.0.1.7")
                && reportB.Contains("Machine ID: 106")
                && reportB.Contains("IP: 10.0.1.7")
                && reportB.Contains("Already Registered: 5")
                && reportB.Contains("Newly Registered: 7")
                && reportB.Contains("Failed: 1")
                && !reportB.Contains("192.168.90.223");
        }
    }
}