using System;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using PolyTrader.Core.Persistence;
using PolyTraderSharp.Models;
using PolyTraderSharp.Services;

namespace PolyTraderSharp.Ui.Views
{
    /// <summary>
    /// Core-Settings-Fenster: allgemeine Server-Einstellungen (PropertyGrid) und die
    /// allgemeine Verwaltung der Polymarket-Accounts (Wallets, API-Keys …).
    /// Die copytrading-spezifischen Detail-Limits werden NICHT hier, sondern im
    /// Copytrading-Modul-View bearbeitet (AccountState ist bewusst general-only).
    /// </summary>
    public partial class SettingsView : Form
    {
        private const string SettingsPath = "server_settings.xml";

        private ServerSettings _settings = new();
        private ThreemaService? _threema;
        private MullvadVpnService? _vpn;
        private TerminalLogger? _logger;

        private IAccountRepository? _accountRepo;
        private TradingState? _state;
        private BindingList<AccountState> _accounts = new();

        public SettingsView()
        {
            InitializeComponent();

            btn_save.Click += (_, _) => Save();
            btn_loadsettings.Click += (_, _) => Reload();

            btnAccNew.Click += (_, _) => AddAccount();
            btnAccDelete.Click += (_, _) => DeleteAccount();
            dgvAccounts.SelectionChanged += (_, _) =>
            {
                pgAccount.SelectedObject = dgvAccounts.CurrentRow?.DataBoundItem as AccountState;
            };
            pgAccount.PropertyValueChanged += (_, _) =>
            {
                if (pgAccount.SelectedObject is AccountState acc) SaveAccount(acc);
            };
        }

        public void Initialize(ThreemaService threema, MullvadVpnService vpn, TerminalLogger logger,
            IAccountRepository accountRepo, TradingState state)
        {
            _threema = threema;
            _vpn = vpn;
            _logger = logger;
            _accountRepo = accountRepo;
            _state = state;

            Reload();
            LoadAccounts();
        }

        // ===== Server-Settings =====

        private void Reload()
        {
            _settings = ServerSettings.Load(SettingsPath);
            propertyGrid.SelectedObject = _settings;
        }

        private void Save()
        {
            try
            {
                _settings.Save(SettingsPath);
                _threema?.ReloadSettings();
                _vpn?.ReloadSettings();
                _logger?.Info("Server-Einstellungen gespeichert und Services neu geladen.");
                MessageBox.Show("Server-Einstellungen gespeichert.", "Erfolg",
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Fehler beim Speichern: {ex.Message}", "Fehler",
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        // ===== Polymarket Accounts (allgemeine Einstellungen) =====

        private void LoadAccounts()
        {
            if (_state == null) return;
            _accounts = new BindingList<AccountState>(_state.Accounts.Values.OrderBy(a => a.AccountId).ToList());
            dgvAccounts.DataSource = _accounts;
            pgAccount.SelectedObject = dgvAccounts.CurrentRow?.DataBoundItem as AccountState;
        }

        private void AddAccount()
        {
            if (_state == null || _accountRepo == null) return;

            int newId = _state.Accounts.Count > 0 ? _state.Accounts.Keys.Max() + 1 : 1;
            var acc = new AccountState { AccountId = newId, Name = "Neuer Account" };

            _state.Accounts[acc.AccountId] = acc;
            _accountRepo.Upsert(acc);

            _accounts.Add(acc);
            dgvAccounts.CurrentCell = dgvAccounts.Rows[dgvAccounts.Rows.Count - 1].Cells[0];
        }

        private void DeleteAccount()
        {
            if (_state == null || _accountRepo == null) return;
            if (dgvAccounts.CurrentRow?.DataBoundItem is not AccountState acc) return;

            if (MessageBox.Show($"Account '{acc.Name}' (ID {acc.AccountId}) wirklich löschen?",
                    "Löschen bestätigen", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) != DialogResult.Yes)
                return;

            _state.Accounts.TryRemove(acc.AccountId, out _);
            _accountRepo.Delete(acc.AccountId);
            _accounts.Remove(acc);
        }

        private void SaveAccount(AccountState acc)
        {
            _accountRepo?.Upsert(acc);
            _state?.Accounts.AddOrUpdate(acc.AccountId, acc, (_, _) => acc);
            dgvAccounts.Refresh();
        }
    }
}