using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Poe2Trade.Bot;
using Poe2Trade.Core;
using Poe2Trade.Inventory;
using Serilog;

namespace Poe2Trade.Ui.ViewModels;

public partial class SettingsViewModel : ObservableObject
{
    private readonly BotOrchestrator _bot;

    [ObservableProperty] private string _poe2LogPath = "";
    [ObservableProperty] private string _windowTitle = "";
    [ObservableProperty] private decimal? _travelTimeoutMs = 15000;
    [ObservableProperty] private decimal? _stashScanTimeoutMs = 10000;
    [ObservableProperty] private decimal? _waitForMoreItemsMs = 20000;
    [ObservableProperty] private decimal? _betweenTradesDelayMs = 5000;
    [ObservableProperty] private bool _headless = true;
    [ObservableProperty] private bool _showHudDebug;
    [ObservableProperty] private string _ocrEngine = "WinOCR";
    [ObservableProperty] private bool _isSaved;
    [ObservableProperty] private string _calibrationStatus = "";
    [ObservableProperty] private string _stashCalibratedAt = "";
    [ObservableProperty] private string _shopCalibratedAt = "";

    public static string[] OcrEngineOptions { get; } = ["WinOCR", "OneOCR", "EasyOCR"];

    public ObservableCollection<StashTabViewModel> StashTabs { get; } = [];
    public ObservableCollection<StashTabViewModel> ShopTabs { get; } = [];

    public SettingsViewModel(BotOrchestrator bot)
    {
        _bot = bot;
        LoadFromConfig();
        LoadTabs();
    }

    private void LoadFromConfig()
    {
        var s = _bot.Store.Settings;
        Poe2LogPath = s.Poe2LogPath;
        WindowTitle = s.Poe2WindowTitle;
        TravelTimeoutMs = s.TravelTimeoutMs;
        StashScanTimeoutMs = s.StashScanTimeoutMs;
        WaitForMoreItemsMs = s.WaitForMoreItemsMs;
        BetweenTradesDelayMs = s.BetweenTradesDelayMs;
        Headless = s.Headless;
        ShowHudDebug = s.ShowHudDebug;
        OcrEngine = s.OcrEngine;
    }

    private void LoadTabs()
    {
        var s = _bot.Store.Settings;

        StashTabs.Clear();
        if (s.StashCalibration != null)
        {
            foreach (var tab in s.StashCalibration.Tabs)
                StashTabs.Add(new StashTabViewModel(tab));
            StashCalibratedAt = FormatTimestamp(s.StashCalibration.CalibratedAt);
        }
        else
        {
            StashCalibratedAt = "Not calibrated";
        }

        ShopTabs.Clear();
        if (s.ShopCalibration != null)
        {
            foreach (var tab in s.ShopCalibration.Tabs)
                ShopTabs.Add(new StashTabViewModel(tab));
            ShopCalibratedAt = FormatTimestamp(s.ShopCalibration.CalibratedAt);
        }
        else
        {
            ShopCalibratedAt = "Not calibrated";
        }
    }

    private static string FormatTimestamp(long unixMs)
    {
        if (unixMs == 0) return "Not calibrated";
        var dt = DateTimeOffset.FromUnixTimeMilliseconds(unixMs).LocalDateTime;
        return dt.ToString("yyyy-MM-dd HH:mm");
    }

    [RelayCommand]
    private void SaveSettings()
    {
        _bot.Store.UpdateSettings(s =>
        {
            s.Poe2LogPath = Poe2LogPath;
            s.Poe2WindowTitle = WindowTitle;
            s.TravelTimeoutMs = (int)(TravelTimeoutMs ?? 15000);
            s.StashScanTimeoutMs = (int)(StashScanTimeoutMs ?? 10000);
            s.WaitForMoreItemsMs = (int)(WaitForMoreItemsMs ?? 20000);
            s.BetweenTradesDelayMs = (int)(BetweenTradesDelayMs ?? 5000);
            s.Headless = Headless;
            s.ShowHudDebug = ShowHudDebug;
            s.OcrEngine = OcrEngine;
        });

        IsSaved = true;
    }

    [RelayCommand]
    private void SaveTabs()
    {
        _bot.Store.UpdateSettings(s =>
        {
            // Models are already updated via write-through in StashTabViewModel
            // Just trigger a save
            if (s.StashCalibration != null)
                s.StashCalibration = s.StashCalibration;
            if (s.ShopCalibration != null)
                s.ShopCalibration = s.ShopCalibration;
        });

        CalibrationStatus = "Tabs saved!";
    }

    [RelayCommand]
    private async Task CalibrateStash()
    {
        try
        {
            var calibrator = new StashCalibrator(_bot.Screen, _bot.Game);
            CalibrationStatus = "Calibrating stash...";

            await _bot.Game.FocusGame();
            await Helpers.RandomDelay(150, 300);

            var pos = await _bot.Inventory.FindAndClickNameplate("STASH");
            if (!pos.HasValue)
            {
                CalibrationStatus = "STASH not found. Stand near your stash.";
                return;
            }
            await Helpers.RandomDelay(300, 500);

            var cal = await calibrator.CalibrateOpenPanel();

            await _bot.Game.PressEscape();
            await Helpers.RandomDelay(200, 400);

            _bot.Store.UpdateSettings(s => s.StashCalibration = cal);
            LoadTabs();
            CalibrationStatus = $"Stash calibrated — {cal.Tabs.Count} tabs found.";
        }
        catch (Exception ex)
        {
            CalibrationStatus = $"Stash calibration failed: {ex.Message}";
            Log.Error(ex, "Stash calibration failed");
        }
    }

    [RelayCommand]
    private async Task CalibrateShop()
    {
        try
        {
            var calibrator = new StashCalibrator(_bot.Screen, _bot.Game);
            CalibrationStatus = "Calibrating shop...";

            await _bot.Game.FocusGame();
            await Helpers.RandomDelay(150, 300);

            var pos = await _bot.Inventory.FindAndClickNameplate("ANGE");
            if (!pos.HasValue)
            {
                CalibrationStatus = "ANGE not found. Stand near the vendor.";
                return;
            }
            await Helpers.RandomDelay(800, 1200);

            // ANGE opens a dialog — click "Manage Shop"
            var dialogRegion = new Region(pos.Value.X, pos.Value.Y, 460, 600);
            var managePos = await _bot.Screen.FindTextInRegion(dialogRegion, "Manage");
            if (managePos.HasValue)
            {
                await _bot.Game.LeftClickAt(managePos.Value.X, managePos.Value.Y);
                await Helpers.RandomDelay(300, 500);
            }
            else
            {
                Log.Warning("'Manage Shop' not found in dialog region, saving debug capture");
                await _bot.Screen.SaveRegion(dialogRegion, "debug/calibrate-dialog.png");
            }

            var cal = await calibrator.CalibrateOpenPanel(firstFolderOnly: true);

            await _bot.Game.PressEscape();
            await Helpers.RandomDelay(200, 400);

            _bot.Store.UpdateSettings(s => s.ShopCalibration = cal);
            LoadTabs();
            CalibrationStatus = $"Shop calibrated — {cal.Tabs.Count} tabs found.";
        }
        catch (Exception ex)
        {
            CalibrationStatus = $"Shop calibration failed: {ex.Message}";
            Log.Error(ex, "Shop calibration failed");
        }
    }

    partial void OnPoe2LogPathChanged(string value) => IsSaved = false;
    partial void OnWindowTitleChanged(string value) => IsSaved = false;
    partial void OnTravelTimeoutMsChanged(decimal? value) => IsSaved = false;
    partial void OnStashScanTimeoutMsChanged(decimal? value) => IsSaved = false;
    partial void OnWaitForMoreItemsMsChanged(decimal? value) => IsSaved = false;
    partial void OnBetweenTradesDelayMsChanged(decimal? value) => IsSaved = false;
    partial void OnHeadlessChanged(bool value) => IsSaved = false;
    partial void OnShowHudDebugChanged(bool value) => IsSaved = false;
    partial void OnOcrEngineChanged(string value) => IsSaved = false;
}