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

namespace Poe2Trade.Ui.ViewModels;

public class LogEntry
{
    public string Time { get; init; } = "";
    public string Level { get; init; } = "";
    public string Message { get; init; } = "";
}

public partial class CellState : ObservableObject
{
    [ObservableProperty] private bool _isOccupied;
    [ObservableProperty] private bool _borderTop;
    [ObservableProperty] private bool _borderBottom;
    [ObservableProperty] private bool _borderLeft;
    [ObservableProperty] private bool _borderRight;
}

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

    [ObservableProperty]
    private string _state = "Idle";

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(PauseButtonText))]
    private bool _isPaused;

    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(StartCommand))]
    [NotifyCanExecuteChangedFor(nameof(PauseCommand))]
    private bool _isStarted;

    [ObservableProperty] private string _newUrl = "";
    [ObservableProperty] private string _newLinkName = "";
    [ObservableProperty] private LinkMode _newLinkMode = LinkMode.Live;
    [ObservableProperty] private int _tradesCompleted;
    [ObservableProperty] private int _tradesFailed;
    [ObservableProperty] private int _activeLinksCount;

    public static LinkMode[] LinkModes { get; } = [LinkMode.Live, LinkMode.Scrap];

    public MainWindowViewModel(BotOrchestrator bot)
    {
        _bot = bot;
        _isPaused = bot.IsPaused;

        for (var i = 0; i < 60; i++)
            InventoryCells.Add(new CellState());

        bot.StatusUpdated += () =>
        {
            Avalonia.Threading.Dispatcher.UIThread.Post(() =>
            {
                State = bot.State;
                IsPaused = bot.IsPaused;
                var status = bot.GetStatus();
                TradesCompleted = status.TradesCompleted;
                TradesFailed = status.TradesFailed;
                ActiveLinksCount = status.Links.Count(l => l.Active);
                OnPropertyChanged(nameof(Links));
                UpdateInventoryGrid();
            });
        };

        bot.LogMessage += (level, message) =>
        {
            Avalonia.Threading.Dispatcher.UIThread.Post(() =>
            {
                Logs.Add(new LogEntry
                {
                    Time = DateTime.Now.ToString("HH:mm:ss"),
                    Level = level.ToUpperInvariant(),
                    Message = message
                });
                if (Logs.Count > 500) Logs.RemoveAt(0);
            });
        };
    }

    public string PauseButtonText => IsPaused ? "Resume" : "Pause";
    public List<TradeLink> Links => _bot.Links.GetLinks();
    public ObservableCollection<LogEntry> Logs { get; } = [];
    public ObservableCollection<CellState> InventoryCells { get; } = [];
    public int InventoryFreeCells => _bot.IsReady ? _bot.Inventory.Tracker.FreeCells : 60;

    // Sub-ViewModels for tabs
    public DebugViewModel? DebugVm { get; set; }
    public SettingsViewModel? SettingsVm { get; set; }

    [RelayCommand(CanExecute = nameof(CanStart))]
    private async Task Start()
    {
        try
        {
            await _bot.Start([]);
            IsStarted = true;
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Failed to start bot");
            Logs.Add(new LogEntry
            {
                Time = DateTime.Now.ToString("HH:mm:ss"),
                Level = "ERROR",
                Message = $"Start failed: {ex.Message}"
            });
        }
    }
    private bool CanStart() => !IsStarted;

    [RelayCommand(CanExecute = nameof(CanPause))]
    private void Pause()
    {
        if (_bot.IsPaused) _bot.Resume();
        else _bot.Pause();
    }
    private bool CanPause() => IsStarted;

    [RelayCommand]
    private void AddLink()
    {
        if (string.IsNullOrWhiteSpace(NewUrl)) return;
        _bot.AddLink(NewUrl, NewLinkName, NewLinkMode);
        NewUrl = "";
        NewLinkName = "";
    }

    [RelayCommand]
    private void RemoveLink(string? id)
    {
        if (id != null) _bot.RemoveLink(id);
    }

    [RelayCommand]
    private void ToggleLink(string? id)
    {
        if (id == null) return;
        var link = _bot.Links.GetLink(id);
        if (link != null) _bot.ToggleLink(id, !link.Active);
    }

    private void UpdateInventoryGrid()
    {
        if (!_bot.IsReady) return;
        var (grid, items, _) = _bot.Inventory.GetInventoryState();

        for (var r = 0; r < 5; r++)
        for (var c = 0; c < 12; c++)
        {
            var cell = InventoryCells[r * 12 + c];
            cell.IsOccupied = grid[r, c];
            cell.BorderTop = false;
            cell.BorderBottom = false;
            cell.BorderLeft = false;
            cell.BorderRight = false;
        }

        foreach (var item in items)
        {
            for (var r = item.Row; r < item.Row + item.H; r++)
            for (var c = item.Col; c < item.Col + item.W; c++)
            {
                if (r >= 5 || c >= 12) continue;
                var cell = InventoryCells[r * 12 + c];
                if (r == item.Row) cell.BorderTop = true;
                if (r == item.Row + item.H - 1) cell.BorderBottom = true;
                if (c == item.Col) cell.BorderLeft = true;
                if (c == item.Col + item.W - 1) cell.BorderRight = true;
            }
        }

        OnPropertyChanged(nameof(InventoryFreeCells));
    }
}