using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;

namespace InstaSoftOfficeTool.Services
{
    public class OdtDownloader
    {
        private const string OdtDownloadUrl = "https://go.microsoft.com/fwlink/p/?LinkID=626065";

        public event Action<string> StatusChanged;
        public event Action<int> ProgressChanged;

        public string OdtFolder { get; private set; }
        public string SetupExePath { get; private set; }

        public OdtDownloader()
        {
            OdtFolder = Path.Combine(Path.GetTempPath(), "InstaSoftODT");
        }

        public async Task<bool> DownloadAndExtractAsync()
        {
            try
            {
                Directory.CreateDirectory(OdtFolder);

                var odtExePath = Path.Combine(OdtFolder, "officedeploymenttool.exe");
                SetupExePath = Path.Combine(OdtFolder, "setup.exe");

                if (File.Exists(SetupExePath))
                {
                    StatusChanged?.Invoke("Az ODT setup.exe m\u00e1r el\u00e9rhet\u0151, let\u00f6lt\u00e9s kihagyva.");
                    return true;
                }

                StatusChanged?.Invoke("Office Deployment Tool let\u00f6lt\u00e9se...");

                using (var client = new WebClient())
                {
                    client.DownloadProgressChanged += (s, e) =>
                    {
                        ProgressChanged?.Invoke(e.ProgressPercentage);
                    };

                    await client.DownloadFileTaskAsync(new Uri(OdtDownloadUrl), odtExePath);
                }

                StatusChanged?.Invoke("ODT kicsomagol\u00e1sa...");

                var runner = new ProcessRunner();
                var exitCode = await runner.RunAsync(odtExePath,
                    "/extract:\"" + OdtFolder + "\" /quiet");

                if (exitCode != 0)
                {
                    StatusChanged?.Invoke("Hiba: Az ODT kicsomagol\u00e1sa sikertelen (k\u00f3d: " + exitCode + ")");
                    return false;
                }

                if (!File.Exists(SetupExePath))
                {
                    StatusChanged?.Invoke("Hiba: A setup.exe nem tal\u00e1lhat\u00f3 a kicsomagol\u00e1s ut\u00e1n.");
                    return false;
                }

                StatusChanged?.Invoke("ODT sikeresen let\u00f6ltve \u00e9s kicsomagolva.");
                return true;
            }
            catch (Exception ex)
            {
                StatusChanged?.Invoke("Hiba a let\u00f6lt\u00e9s sor\u00e1n: " + ex.Message);
                return false;
            }
        }

        public async Task<int> RunSetupAsync(string configXmlPath, Action<string> outputCallback)
        {
            var runner = new ProcessRunner();
            runner.OutputReceived += line => outputCallback?.Invoke(line);

            StatusChanged?.Invoke("Office telep\u00edt\u00e9s ind\u00edt\u00e1sa...");
            return await runner.RunAsync(SetupExePath, "/configure \"" + configXmlPath + "\"");
        }

        public async Task<int> RunRemoveAsync(string configXmlPath, Action<string> outputCallback)
        {
            var runner = new ProcessRunner();
            runner.OutputReceived += line => outputCallback?.Invoke(line);

            StatusChanged?.Invoke("Office elt\u00e1vol\u00edt\u00e1s ind\u00edt\u00e1sa...");
            return await runner.RunAsync(SetupExePath, "/configure \"" + configXmlPath + "\"");
        }
    }
}