using GCMM.Properties;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GCMM
{
    partial class MainForm
    {
        public void UpdateButton(Button button, bool enabled)
        {
            if (enabled)
            {
                button.ForeColor = Color.Lime;
                button.FlatAppearance.MouseOverBackColor = Color.FromArgb(0, 40, 0);
                button.FlatAppearance.MouseDownBackColor = Color.Green;
            }
            else
            {
                button.ForeColor = Color.Green;
                button.FlatAppearance.MouseOverBackColor = Color.Black;
                button.FlatAppearance.MouseDownBackColor = Color.Black;
            }
        }

        public string GetGameFolder()
        {
            string libs;
            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
                libs = @"C:\Program Files (x86)\Steam\steamapps\libraryfolders.vdf";
            else
                return null;
            foreach (var line in File.ReadAllLines(libs).Concat(new[] { @"C:\Program Files (x86)\Steam\" }))
            {
                var regex = new Regex("\\t\"\\d+\"\\t\\t\"(.+)\"");
                var match = regex.Match(line);
                if (!match.Success)
                    continue;
                string library = match.Groups[1].Value.Replace("\\\\", "\\");
                library += @"\steamapps\common\";
                if (File.Exists(library + @"Gamecraft\Gamecraft.exe"))
                    return library + "Gamecraft";
                if (File.Exists(library + @"RobocraftX\Gamecraft.exe"))
                    return library + "RobocraftX";
            }
            return libs;
        }

        public string SelectGameFolder()
        {
            var ofd = new OpenFileDialog();
            ofd.Filter = "Gamecraft executable|Gamecraft.exe";
            ofd.Title = "Game location";
            ofd.InitialDirectory = @"C:\Program Files (x86)\Steam\steamapps\common\";
            ofd.CheckFileExists = true;
            ofd.ShowDialog();
            if (string.IsNullOrWhiteSpace(ofd.FileName))
                return null;
            return Directory.GetParent(ofd.FileName).FullName;
        }

        private void CheckStartGame(object sender, EventArgs e)
        {
            Action act = () =>
            {
                if (((sender as Process)?.ExitCode ?? 0) != 0)
                {
                    status.Text = "Status: Patching failed";
                    return;
                }
                if ((CheckIfPatched() ?? false) || unpatched.Checked)
                    Process.Start("steam://run/1078000/");
            };
            if (InvokeRequired)
                Invoke(act);
            else
                act();
            EndWork(false);
        }

        public WebClient GetClient()
        {
            var client = new WebClient();
            if (!Settings.Default.UseProxy)
                client.Proxy = null;
            client.Headers.Clear();
            client.Headers[HttpRequestHeader.Accept] = "application/json";
            client.BaseAddress = "https://git.exmods.org";
            return client;
        }

        private bool working = false;
        /// <summary>
        /// Some simple "locking", only allow one operation at a time
        /// </summary>
        /// <returns>Whether the work can begin</returns>
        public bool BeginWork()
        {
            if (working) return false;
            working = true;
            UpdateButton(playbtn, false);
            UpdateButton(installbtn, false);
            UpdateButton(uninstallbtn, false);
            UpdateButton(settingsbtn, false);
            return true;
        }

        public void EndWork(bool desc = true)
        {
            working = false;
            UpdateButton(playbtn, true);
            UpdateButton(settingsbtn, true);
            if (desc)
                modlist_SelectedIndexChanged(modlist, null);
        }
    }
}