using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace SaveWizard
{
    public partial class MainForm: Form
    {
        private readonly string config_file_name = "update.cfg";

        [DllImport("SII_Decrypt.dll")]
        public static extern int GetFileFormat(string FileName);

        [DllImport("SII_Decrypt.dll")]
        public static extern int DecryptAndDecodeFile(string InputFile, string OutputFile);

        private Dictionary<TextBox, WindowItem> items = null;
        private string opened_file_path, selected_game;
        private Dictionary<string, bool> owns = null;

        public MainForm()
        {
            InitializeComponent();
            // Test stuff
            //string path = Path.Combine(Environment.CurrentDirectory, "configs");
            //if (Directory.Exists(path))
            //    Directory.Delete(path, true);
            //path = Path.Combine(Environment.CurrentDirectory, "update.cfg");
            //if (File.Exists(path))
            //    File.Delete(path);
        }

        private class WindowItem
        {
            private readonly CheckBox Check;
            private readonly string Str;
            
            public WindowItem(CheckBox _check, string _str)
            {
                Check = _check;
                Str = _str;
            }

            public CheckBox GetCheck()
            {
                return Check;
            }

            public string GetString()
            {
                return Str;
            }
        }

        private void boxTextChanged(object sender, EventArgs e)
        {
            TextBox _sender = sender as TextBox;
            if (_sender != txt_adr)
                items[_sender].GetCheck().Checked = false;
            else
                chk_adr.Checked = false;
        }

        private void ValidateBasic(object sender, KeyPressEventArgs e)
        {
            //if (!(e.KeyChar >= '0' && e.KeyChar <= '9') && !char.IsControl(e.KeyChar))
            if (!(e.KeyChar >= '0' && e.KeyChar <= '9') && e.KeyChar != (char)Keys.Back)
                e.Handled = true;
        }

        private void ValidateSkills(object sender, KeyPressEventArgs e)
        {
            //if (!(e.KeyChar >= '0' && e.KeyChar <= '6') && !char.IsControl(e.KeyChar))
            if (!(e.KeyChar >= '0' && e.KeyChar <= '6') && e.KeyChar != (char)Keys.Back)
                e.Handled = true;
        }

        private List<string> GetADR(string value)
        {
            string binaryCode = Convert.ToString(int.Parse(value), 2);
            binaryCode = new string('0', 6 - binaryCode.Length) + binaryCode;
            List<string> result = new List<string>();
            foreach (char character in binaryCode)
                result.Add(character.ToString());
            return result;
        }

        private void GetFileData(string filename)
        {
            RegexHandler.FillLines(File.ReadAllLines(filename).ToList());

            foreach (KeyValuePair<TextBox, WindowItem> item in items)
            {
                item.Key.Text = RegexHandler.GetValue(RegexHandler.SearchLine(item.Value.GetString()));
                item.Value.GetCheck().Checked = true;
            }

            txt_adr.Text = string.Join(",", GetADR(RegexHandler.GetValue(RegexHandler.SearchLine("adr:"))));
            chk_adr.Checked = true;
            
            if (RegexHandler.SearchLine("company.volatile.stokes.calais") != 0)
                selected_game = "ets2";
            else if (RegexHandler.SearchLine("company.volatile.ed_mkt.elko") != 0)
                selected_game = "ats";
            else
                selected_game = null;
            if (selected_game != null)
            {
                string config_path = $"configs/{selected_game}/dlc.json";
                if (File.Exists(config_path))
                {
                    Dictionary<string, string> dlc = JsonConvert.DeserializeObject<Dictionary<string, string>>(File.ReadAllText(config_path));
                    owns = new Dictionary<string, bool>
                    {
                        { "base", true }
                    };
                    List<string> companies = RegexHandler.GetArrayItems("companies:");
                    foreach (string company in companies)
                        foreach (KeyValuePair<string, string> item in dlc)
                            if (company.Contains(item.Value))
                                owns[item.Key] = true;
                }
                else
                    Utils.ShowError($"'dlc.json' from '{selected_game}' have errors or not found, functionality has been limited");
            }

            btn_unlock_garages.Enabled = true;
            btn_recover_backup.Enabled = true;
            btn_apply_changes.Enabled = true;
        }

        private void ClearData()
        {
            opened_file_path = null;
            RegexHandler.FillLines(null);
            selected_game = null;
            owns = null;
            foreach (KeyValuePair<TextBox, WindowItem> item in items)
            {
                item.Key.Text = "";
                item.Value.GetCheck().Checked = true;
            }
            txt_adr.Text = "";
            chk_adr.Checked = true;
            btn_unlock_garages.Enabled = false;
            btn_recover_backup.Enabled = false;
            btn_apply_changes.Enabled = false;
        }

        private void MainForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            Application.Exit();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            if (!File.Exists("SII_Decrypt.dll"))
            {
                Utils.ShowError("SII_Decrypt.dll not found! Place dll file near this executable.");
                Close();
            }

            items = new Dictionary<TextBox, WindowItem>
            {
                { txt_money, new WindowItem(chk_money, "money_account:") },
                { txt_experience, new WindowItem(chk_experience, "experience_points:") },
                { txt_loan_limit, new WindowItem(chk_loan_limit, "loan_limit:") },
                { txt_long_distance, new WindowItem(chk_long_distance, "long_dist:") },
                { txt_high_value_cargo, new WindowItem(chk_high_value_cargo, "heavy:") },
                { txt_fragile_cargo, new WindowItem(chk_fragile_cargo, "fragile:") },
                { txt_urgent_delivery, new WindowItem(chk_urgent_delivery, "urgent:") },
                { txt_ecodriving, new WindowItem(chk_ecodriving, "mechanical:") },
            };
            KeyPressEventHandler basic = new KeyPressEventHandler(ValidateBasic);
            txt_money.KeyPress += basic;
            txt_experience.KeyPress += basic;
            txt_loan_limit.KeyPress += basic;
            //txt_adr.KeyPress += new KeyPressEventHandler(ValidateADR);
            KeyPressEventHandler skills = new KeyPressEventHandler(ValidateSkills);
            txt_long_distance.KeyPress += skills;
            txt_high_value_cargo.KeyPress += skills;
            txt_fragile_cargo.KeyPress += skills;
            txt_urgent_delivery.KeyPress += skills;
            txt_ecodriving.KeyPress += skills;
            foreach (TextBox txtbox in items.Keys)
                txtbox.TextChanged += boxTextChanged;
            txt_adr.TextChanged += boxTextChanged;
            Dictionary<string, bool> update_conf = new Dictionary<string, bool>
            {
                { "update_on_start", false }
            };
            string path = Path.Combine(Environment.CurrentDirectory, config_file_name);
            if (File.Exists(path))
                update_conf = JsonConvert.DeserializeObject<Dictionary<string, bool>>(File.ReadAllText(path));
            if (update_conf["update_on_start"])
            {
                chk_update_on_start.Checked = true;
                UpdateForm window = new UpdateForm();
                window.ShowDialog();
                window.Focus();
            }
        }

        private void chk_update_on_start_CheckedChanged(object sender, EventArgs e)
        {
            File.WriteAllText(
                Path.Combine(Environment.CurrentDirectory, config_file_name),
                JsonConvert.SerializeObject(new Dictionary<string, bool>
                {
                    { "update_on_start", chk_update_on_start.Checked }
                })
            );
        }

        private void btn_open_save_Click(object sender, EventArgs e)
        {
            ClearData();
            OpenFileDialog ofd = new OpenFileDialog()
            {
                Title = "Выберите файл сохранения",
                Filter = "Сохранение в формате SII|game.sii",
                Multiselect = false,
            };
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                if (GetFileFormat(ofd.FileName) == 2)
                {
                    if (DecryptAndDecodeFile(ofd.FileName, ofd.FileName) != 0)
                    {
                        Utils.ShowError("Something went wrong with decrypting file. Try again.");
                        return;
                    }
                }
                GetFileData(ofd.FileName);
                opened_file_path = ofd.FileName;
            }
        }

        private void btn_unlock_garages_Click(object sender, EventArgs e)
        {
            SecondForm dlg = new SecondForm(selected_game, owns);
            dlg.ShowDialog();
            dlg.Focus();
        }

        private void btn_recover_backup_Click(object sender, EventArgs e)
        {
            string backup_path = opened_file_path + ".swbak";
            if (!File.Exists(backup_path))
            {
                Utils.ShowError("Backup not found.");
                return;
            }
            File.WriteAllLines(opened_file_path, File.ReadAllLines(backup_path));
            File.Delete(backup_path);
            Utils.ShowInfo("Backup successfully recovered.");
            GetFileData(opened_file_path);
        }

        private void btn_apply_changes_Click(object sender, EventArgs e)
        {
            if (!chk_adr.Checked)
            {
                List<char> adrList = txt_adr.Text.ToList();
                adrList.RemoveAll(i => i == ' ' || i == ',' || i == '.');
                if (adrList.Count < 6)
                {
                    Utils.ShowError("ADR can't have less than 6 elements.");
                }
                else if (adrList.Count > 6)
                {
                    Utils.ShowError("ADR can't have more than 6 elements.");
                }
                else
                {
                    int adrNew = Convert.ToInt32(string.Join("", adrList), 2);
                    RegexHandler.SetValue(RegexHandler.SearchLine("adr:"), adrNew.ToString());
                }
            }
            foreach (KeyValuePair<TextBox, WindowItem> item in items)
                if (!item.Value.GetCheck().Checked)
                    RegexHandler.SetValue(RegexHandler.SearchLine(item.Value.GetString()), item.Key.Text);
            File.WriteAllLines(opened_file_path + ".swbak", RegexHandler.GetBackup());
            File.WriteAllLines(opened_file_path, RegexHandler.GetAllLines());
            Utils.ShowInfo("Changes successfully applied.");
            GetFileData(opened_file_path);
        }
    }
}