using FastReport.Utils;
using System;
using System.IO;

namespace WpfDemo
{
    internal static class Folders
    {
        private static string reportsFolder;
        public static string ReportsFolder => reportsFolder;
        public static string DataFolder => ReportsFolder + @"..\Reports\";
        public static string MapsFolder => ReportsFolder + @"..\Maps\";

        static Folders()
        {
            FindReportsFolder();
            SetupLocalizationFolder();
        }

        private static void FindReportsFolder()
        {
            reportsFolder = "";
            string thisFolder = Config.ApplicationFolder;

            for (int i = 0; i < 6; i++)
            {
                string dir = Path.Combine(thisFolder, "Reports.New\\");
                if (Directory.Exists(dir))
                {
                    string rep_dir = Path.GetFullPath(dir);
                    if (File.Exists(Path.Combine(rep_dir, "reports.xml")))
                    {
                        reportsFolder = rep_dir;
                        break;
                    }
                }
                thisFolder += @"..\";
            }

            if (reportsFolder == "")
            {
                thisFolder = Config.ApplicationFolder;
                for (int i = 0; i < 6; i++)
                {
                    string dir = Path.Combine(thisFolder, "Demos\\Reports.New\\");
                    if (Directory.Exists(dir))
                    {
                        string rep_dir = Path.GetFullPath(dir);
                        if (File.Exists(Path.Combine(rep_dir, "reports.xml")))
                        {
                            reportsFolder = rep_dir;
                            break;
                        }
                    }
                    thisFolder += @"..\";
                }
            }

            if (reportsFolder == "")
                throw new Exception("Could not locate the Reports folder.");
        }

        private static void SetupLocalizationFolder()
        {
            if (!Directory.Exists(Res.LocaleFolder))
                Res.LocaleFolder = Config.ApplicationFolder;
            if (!CheckLocalizationFolder(Res.LocaleFolder))
            {
                string locPath = Path.Combine(Res.LocaleFolder, "Localization");
                if (!CheckLocalizationFolder(locPath))
                {
                    locPath = Res.LocaleFolder;
                    for (int i = 0; i < 6; i++)
                    {
                        locPath = Path.Combine(locPath, "..");
                        string testPath = Path.Combine(locPath, "Localization");
                        if (CheckLocalizationFolder(testPath))
                        {
                            Res.LocaleFolder = testPath;
                            break;
                        }
                    }
                }
                else
                    Res.LocaleFolder = locPath;
            }
        }

        private static bool CheckLocalizationFolder(string path)
        {
            if (Directory.Exists(path))
            {
                string[] locfiles = Directory.GetFiles(path, "*.frl");
                return locfiles.Length > 0;
            }
            return false;
        }
    }
}