using Microsoft.Playwright;
using Poe2Trade.Core;
using Poe2Trade.Game;
using Poe2Trade.Inventory;
using Poe2Trade.GameLog;
using Poe2Trade.Navigation;
using Poe2Trade.Screen;
using Poe2Trade.Trade;
using Serilog;

namespace Poe2Trade.Bot;

public class BotStatus
{
    public bool Paused { get; set; }
    public string State { get; set; } = "Idle";
    public List<TradeLink> Links { get; set; } = [];
    public int TradesCompleted { get; set; }
    public int TradesFailed { get; set; }
    public long Uptime { get; set; }
}

public class BotOrchestrator : IAsyncDisposable
{
    private bool _paused;
    private string _state = "Idle";
    private volatile int _tradesCompleted;
    private volatile int _tradesFailed;
    private readonly long _startTime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
    private bool _started;

    public ConfigStore Store { get; }
    public SavedSettings Config => Store.Settings;
    public LinkManager Links { get; }
    public IGameController Game { get; }
    public IScreenReader Screen { get; }
    public IClientLogWatcher LogWatcher { get; }
    public ITradeMonitor TradeMonitor { get; }
    public IInventoryManager Inventory { get; }
    public TradeExecutor TradeExecutor { get; }
    public TradeQueue TradeQueue { get; }
    public NavigationExecutor Navigation { get; }
    public FramePipelineService PipelineService { get; }
    public GameStateDetector GameState { get; }
    public HudReader HudReader { get; }
    public EnemyDetector EnemyDetector { get; }
    public BossDetector BossDetector { get; }
    public FrameSaver FrameSaver { get; }
    public BossRunExecutor BossRunExecutor { get; }
    private readonly Dictionary<string, ScrapExecutor> _scrapExecutors = new();

    // Events
    public event Action? StatusUpdated;
    public event Action<string, string>? LogMessage; // level, message

    public BotOrchestrator(ConfigStore store, IGameController game, IScreenReader screen,
        IClientLogWatcher logWatcher, ITradeMonitor tradeMonitor,
        IInventoryManager inventory, TradeExecutor tradeExecutor,
        TradeQueue tradeQueue, LinkManager links, FramePipelineService pipelineService)
    {
        Store = store;
        Game = game;
        Screen = screen;
        LogWatcher = logWatcher;
        TradeMonitor = tradeMonitor;
        Inventory = inventory;
        TradeExecutor = tradeExecutor;
        TradeQueue = tradeQueue;
        Links = links;
        PipelineService = pipelineService;

        // Create consumers
        var minimapCapture = new MinimapCapture(new MinimapConfig(), pipelineService.Backend, "assets");
        GameState = new GameStateDetector();
        HudReader = new HudReader();
        EnemyDetector = new EnemyDetector();
        BossDetector = new BossDetector();
        FrameSaver = new FrameSaver();

        // Register on shared pipeline
        pipelineService.Pipeline.AddConsumer(minimapCapture);
        pipelineService.Pipeline.AddConsumer(GameState);
        pipelineService.Pipeline.AddConsumer(HudReader);
        pipelineService.Pipeline.AddConsumer(EnemyDetector);
        pipelineService.Pipeline.AddConsumer(BossDetector);
        pipelineService.Pipeline.AddConsumer(FrameSaver);

        // Pass shared pipeline to NavigationExecutor
        Navigation = new NavigationExecutor(game, pipelineService.Pipeline, minimapCapture,
            enemyDetector: EnemyDetector);

        BossRunExecutor = new BossRunExecutor(game, screen, inventory, logWatcher, store.Settings, BossDetector);

        logWatcher.AreaEntered += area =>
        {
            Navigation.Reset();
            OnAreaEntered(area);
        };
        logWatcher.Start(); // start early so area events fire even before Bot.Start()
        _paused = store.Settings.Paused;
    }

    // Boss zones → boss name mapping
    private static readonly Dictionary<string, string> BossZones = new(StringComparer.OrdinalIgnoreCase)
    {
        ["The Black Cathedral"] = "kulemak",
    };

    private void OnAreaEntered(string area)
    {
        if (BossZones.TryGetValue(area, out var boss))
        {
            BossDetector.SetBoss(boss);
            BossDetector.Enabled = true;
            Log.Information("Boss zone detected: {Area} → enabling {Boss} detector", area, boss);
        }
        else if (BossDetector.Enabled)
        {
            BossDetector.Enabled = false;
            Log.Information("Left boss zone → disabling boss detector");
        }
    }

    public bool IsReady => _started;
    public bool IsPaused => _paused;

    public BotMode Mode
    {
        get => Config.Mode;
        set
        {
            if (Config.Mode == value) return;
            Store.UpdateSettings(s => s.Mode = value);
            StatusUpdated?.Invoke();
        }
    }

    public string State
    {
        get => _state;
        set
        {
            if (_state == value) return;
            _state = value;
            StatusUpdated?.Invoke();
        }
    }

    public void Pause()
    {
        _paused = true;
        Store.SetPaused(true);
        Log.Information("Bot paused");
        StatusUpdated?.Invoke();
    }

    public void Resume()
    {
        _paused = false;
        Store.SetPaused(false);
        Log.Information("Bot resumed");
        StatusUpdated?.Invoke();
    }

    public TradeLink AddLink(string url, string? name = null, LinkMode? mode = null, PostAction? postAction = null)
    {
        var link = Links.AddLink(url, name ?? "", mode, postAction);
        StatusUpdated?.Invoke();
        return link;
    }

    public void RemoveLink(string id)
    {
        Links.RemoveLink(id);
        StatusUpdated?.Invoke();
    }

    public void ToggleLink(string id, bool active)
    {
        var link = Links.ToggleLink(id, active);
        if (link == null) return;
        StatusUpdated?.Invoke();

        if (active)
            _ = ActivateLink(link);
        else
            _ = DeactivateLink(id);
    }

    public BotStatus GetStatus() => new()
    {
        Paused = _paused,
        State = _state,
        Links = Links.GetLinks(),
        TradesCompleted = _tradesCompleted,
        TradesFailed = _tradesFailed,
        Uptime = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - _startTime,
    };

    public void UpdateExecutorState()
    {
        var execState = TradeExecutor.State;
        if (execState != TradeState.Idle)
        {
            State = execState.ToString();
            return;
        }
        foreach (var scrapExec in _scrapExecutors.Values)
        {
            if (scrapExec.State != ScrapState.Idle)
            {
                State = scrapExec.State.ToString();
                return;
            }
        }
        if (BossRunExecutor.State != BossRunState.Idle)
        {
            State = BossRunExecutor.State.ToString();
            return;
        }
        if (Navigation.State != NavigationState.Idle)
        {
            State = Navigation.State.ToString();
            return;
        }
        State = "Idle";
    }

    public async Task Start(IReadOnlyList<string> cliUrls)
    {
        LogWatcher.Start();
        Emit("info", "Watching Client.txt for game events");

        await TradeMonitor.Start();
        Emit("info", "Browser launched");

        // Warmup OCR daemon
        var ocrWarmup = Screen.Warmup().ContinueWith(t =>
        {
            if (t.IsFaulted) Log.Warning(t.Exception!, "OCR warmup failed");
        });

        // Check if already in hideout
        var inHideout = LogWatcher.CurrentArea.Contains("hideout", StringComparison.OrdinalIgnoreCase);
        if (inHideout)
        {
            Log.Information("Already in hideout: {Area}", LogWatcher.CurrentArea);
            Inventory.SetLocation(true);
        }
        else
        {
            Emit("info", "Sending /hideout command...");
            await Game.FocusGame();
            var arrivedHome = await Inventory.WaitForAreaTransition(Config.TravelTimeoutMs, () => Game.GoToHideout());
            Inventory.SetLocation(true);
            if (!arrivedHome)
                Log.Warning("Timed out waiting for hideout transition on startup");
        }

        State = "InHideout";
        Emit("info", "In hideout, ready to trade");

        await ocrWarmup;

        // Wire executor events
        TradeExecutor.StateChanged += _ => UpdateExecutorState();
        Navigation.StateChanged += _ => UpdateExecutorState();
        TradeQueue.TradeCompleted += () => { Interlocked.Increment(ref _tradesCompleted); StatusUpdated?.Invoke(); };
        TradeQueue.TradeFailed += () => { Interlocked.Increment(ref _tradesFailed); StatusUpdated?.Invoke(); };
        Inventory.Updated += () => StatusUpdated?.Invoke();

        _started = true;

        Emit("info", "Checking inventory for leftover items...");
        await Inventory.ClearToStash();
        Emit("info", "Inventory cleared");

        // Load links
        var allUrls = new HashSet<string>(cliUrls);
        foreach (var l in Store.Settings.Links)
            allUrls.Add(l.Url);

        foreach (var url in allUrls)
        {
            var link = Links.AddLink(url);
            if (link.Active)
                await ActivateLink(link);
            else
                Emit("info", $"Loaded (inactive): {link.Name}");
        }

        // Wire trade monitor events
        TradeMonitor.NewListings += OnNewListings;

        Emit("info", $"Loaded {allUrls.Count} trade link(s)");
        Log.Information("Bot started");
    }

    public async Task StartMapping()
    {
        LogWatcher.Start();
        await Game.FocusGame();
        await Screen.Warmup();

        BossRunExecutor.StateChanged += _ => UpdateExecutorState();
        Navigation.StateChanged += _ => UpdateExecutorState();
        _started = true;

        if (Config.MapType == MapType.Kulemak)
        {
            // Boss run needs hideout first
            var inHideout = LogWatcher.CurrentArea.Contains("hideout", StringComparison.OrdinalIgnoreCase);
            if (!inHideout)
            {
                Emit("info", "Sending /hideout command...");
                var arrivedHome = await Inventory.WaitForAreaTransition(Config.TravelTimeoutMs, () => Game.GoToHideout());
                if (!arrivedHome)
                    Log.Warning("Timed out waiting for hideout transition on startup");
            }
            Inventory.SetLocation(true);

            Emit("info", "Starting boss run loop...");
            State = "Preparing";
            _ = BossRunExecutor.RunBossLoop().ContinueWith(t =>
            {
                if (t.IsFaulted)
                {
                    Log.Error(t.Exception!, "Boss run loop failed");
                    Emit("error", $"Boss run failed: {t.Exception?.InnerException?.Message}");
                }
                else
                {
                    Emit("info", "Boss run loop finished");
                }
                State = "Idle";
                StatusUpdated?.Invoke();
            });
        }
        else
        {
            Emit("info", "Starting map exploration...");
            State = "Exploring";
            _ = Navigation.RunExploreLoop().ContinueWith(t =>
            {
                if (t.IsFaulted)
                {
                    Log.Error(t.Exception!, "Explore loop failed");
                    Emit("error", $"Explore loop failed: {t.Exception?.InnerException?.Message}");
                }
                else
                {
                    Emit("info", "Exploration finished");
                }
                State = "Idle";
                StatusUpdated?.Invoke();
            });
        }
    }

    public async ValueTask DisposeAsync()
    {
        Log.Information("Shutting down bot...");
        foreach (var exec in _scrapExecutors.Values)
            await exec.Stop();
        EnemyDetector.Dispose();
        Screen.Dispose();
        await TradeMonitor.DisposeAsync();
        LogWatcher.Dispose();
        PipelineService.Dispose();
    }

    private void OnNewListings(string searchId, List<string> itemIds, IPage page)
    {
        if (_paused)
        {
            Emit("warn", $"New listings ({itemIds.Count}) skipped - bot paused");
            return;
        }
        if (!Links.IsActive(searchId)) return;

        Log.Information("New listings: {SearchId} ({Count} items)", searchId, itemIds.Count);
        Emit("info", $"New listings: {itemIds.Count} items from {searchId}");

        TradeQueue.Enqueue(new TradeInfo(
            SearchId: searchId,
            ItemIds: itemIds,
            WhisperText: "",
            Timestamp: DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
            TradeUrl: "",
            Page: page
        ));
    }

    private async Task ActivateLink(TradeLink link)
    {
        try
        {
            if (link.Mode == LinkMode.Scrap)
            {
                var scrapExec = new ScrapExecutor(Game, Screen, TradeMonitor, Inventory, Config);
                scrapExec.StateChanged += _ => UpdateExecutorState();
                scrapExec.ItemBought += () => { Interlocked.Increment(ref _tradesCompleted); StatusUpdated?.Invoke(); };
                scrapExec.ItemFailed += () => { Interlocked.Increment(ref _tradesFailed); StatusUpdated?.Invoke(); };
                _scrapExecutors[link.Id] = scrapExec;
                Emit("info", $"Scrap loop started: {link.Name}");
                StatusUpdated?.Invoke();

                _ = scrapExec.RunScrapLoop(link.Url, link.PostAction).ContinueWith(t =>
                {
                    if (t.IsFaulted)
                    {
                        Log.Error(t.Exception!, "Scrap loop error: {LinkId}", link.Id);
                        Emit("error", $"Scrap loop failed: {link.Name}");
                        _scrapExecutors.Remove(link.Id);
                    }
                });
            }
            else
            {
                await TradeMonitor.AddSearch(link.Url);
                Emit("info", $"Monitoring: {link.Name}");
                StatusUpdated?.Invoke();
            }
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Failed to activate link: {Url}", link.Url);
            Emit("error", $"Failed to activate: {link.Name}");
        }
    }

    private async Task DeactivateLink(string id)
    {
        if (_scrapExecutors.TryGetValue(id, out var scrapExec))
        {
            await scrapExec.Stop();
            _scrapExecutors.Remove(id);
        }
        await TradeMonitor.PauseSearch(id);
    }

    private void Emit(string level, string message) => LogMessage?.Invoke(level, message);
}