using System;
using System.IO;

namespace HanvonF710XAttendanceService
{
    internal static class ApplicationPaths
    {
        public static string BaseDirectory { get; private set; } = AppDomain.CurrentDomain.BaseDirectory ?? "";

        public static string InternalLogs => Path.Combine(BaseDirectory, "InternalLogs");
        public static string Logs => Path.Combine(BaseDirectory, "Logs");
        public static string TemplateRawLogs => Path.Combine(BaseDirectory, "TemplateRawLogs");

        public static void Initialize()
        {
            BaseDirectory = AppDomain.CurrentDomain.BaseDirectory ?? "";
            try
            {
                Environment.CurrentDirectory = BaseDirectory;
            }
            catch
            {
                // Best effort; paths below are always rooted to BaseDirectory.
            }

            EnsureDirectory(InternalLogs);
            EnsureDirectory(Logs);
            EnsureDirectory(TemplateRawLogs);
            EnsureDirectory(Path.Combine(Logs, "Attendance"));
            EnsureDirectory(Path.Combine(Logs, "Machine User service"));
            EnsureDirectory(Path.Combine(Logs, "SaveFaceTemplate logs"));
            EnsureDirectory(Path.Combine(Logs, "FaceTransferLog"));
        }

        public static string Resolve(string relativeOrAbsolutePath)
        {
            if (string.IsNullOrWhiteSpace(relativeOrAbsolutePath))
            {
                return BaseDirectory;
            }

            string trimmed = relativeOrAbsolutePath.Trim();
            return Path.IsPathRooted(trimmed)
                ? trimmed
                : Path.Combine(BaseDirectory, trimmed);
        }

        public static string DatedFile(string directory, string filePrefix)
        {
            string datePart = DateTime.Now.Date.ToShortDateString().Replace('/', '_');
            return Path.Combine(directory, filePrefix + "_" + datePart + ".txt");
        }

        private static void EnsureDirectory(string path)
        {
            if (string.IsNullOrWhiteSpace(path))
            {
                return;
            }

            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
        }
    }
}