using GEUTEBRUECK.GeViScope.Wrapper.DBI;
using GEUTEBRUECK.GeViScope.Wrapper.Actions;
using GEUTEBRUECK.GeViScope.Wrapper.Actions.SystemActions;
using GEUTEBRUECK.GeViScope.Wrapper.Actions.DigitalContactsActions;
using GEUTEBRUECK.GeViScope.Wrapper.Actions.ActionDispatcher;
using GEUTEBRUECK.GeViScope.Wrapper.MediaPlayer;
using Microsoft.OpenApi.Models;
using System.Collections;

var builder = WebApplication.CreateBuilder(args);

// Add Swagger services
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(c =>
{
    c.SwaggerDoc("v1", new OpenApiInfo
    {
        Title = "GeViScope Bridge API",
        Version = "v1",
        Description = "REST API bridge for Geutebruck GeViScope Camera Server SDK. Provides access to camera control, video routing, PTZ, and action/event handling."
    });
});

// GeViScope connection state
GscServer? gscServer = null;
GscPLCWrapper? gscPLC = null;
GscActionDispatcher? actionDispatcher = null;
string? currentAddress = null;
string? currentUsername = null;
List<string> receivedMessages = new List<string>();
List<MediaChannelInfo> mediaChannels = new List<MediaChannelInfo>();

var app = builder.Build();

// Action dispatcher event handlers
void OnCustomAction(object? sender, GscAct_CustomActionEventArgs e)
{
    var msg = $"[{DateTime.Now:HH:mm:ss}] CustomAction({e.aInt}, \"{e.aString}\")";
    Console.WriteLine(msg);
    receivedMessages.Add(msg);
}

void OnDigitalInput(object? sender, GscAct_DigitalInputEventArgs e)
{
    var msg = $"[{DateTime.Now:HH:mm:ss}] DigitalInput(GlobalNo={e.aContact.GlobalNo})";
    Console.WriteLine(msg);
    receivedMessages.Add(msg);
}

// PLC callback handler
void OnPLCCallback(object? sender, PLCCallbackEventArgs e)
{
    try
    {
        if (e.PlcNotification.GetNotificationType() == GscPlcNotificationType.plcnNewActionData)
        {
            var action = e.PlcNotification.GetAction();
            if (action != null && actionDispatcher != null)
            {
                if (!actionDispatcher.Dispatch(action))
                {
                    var msg = $"[{DateTime.Now:HH:mm:ss}] Action: {action}";
                    Console.WriteLine(msg);
                    receivedMessages.Add(msg);
                }
            }
        }
        else if (e.PlcNotification.GetNotificationType() == GscPlcNotificationType.plcnNewEventData)
        {
            var eventData = e.PlcNotification.GetEventData();
            if (eventData != null)
            {
                var eventType = eventData.EventNotificationType switch
                {
                    GscPlcEventNotificationType.plcenEventStarted => "started",
                    GscPlcEventNotificationType.plcenEventStopped => "stopped",
                    GscPlcEventNotificationType.plcenEventRetriggered => "retriggered",
                    _ => "unknown"
                };
                var msg = $"[{DateTime.Now:HH:mm:ss}] Event: {eventData.EventHeader.EventName} {eventData.EventHeader.EventID} {eventType}";
                Console.WriteLine(msg);
                receivedMessages.Add(msg);
            }
        }
        else if (e.PlcNotification.GetNotificationType() == GscPlcNotificationType.plcnPushCallbackLost)
        {
            var msg = $"[{DateTime.Now:HH:mm:ss}] Connection lost!";
            Console.WriteLine(msg);
            receivedMessages.Add(msg);
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] PLC Callback error: {ex.Message}");
    }
}

// Helper function to create PLC and register callbacks
void CreatePLC()
{
    if (gscServer == null) return;

    gscPLC = gscServer.CreatePLC();
    gscPLC.PLCCallback += OnPLCCallback;
    gscPLC.OpenPushCallback();

    actionDispatcher = new GscActionDispatcher();
    actionDispatcher.OnCustomAction += OnCustomAction;
    actionDispatcher.OnDigitalInput += OnDigitalInput;

    gscPLC.SubscribeActionsAll();
    gscPLC.SubscribeEventsAll();
}

// Helper function to destroy PLC
void DestroyPLC(bool connectionLost = false)
{
    if (gscPLC != null)
    {
        if (!connectionLost)
        {
            gscPLC.UnsubscribeAll();
            gscPLC.CloseCallback();
        }

        if (actionDispatcher != null)
        {
            actionDispatcher.Dispose();
            actionDispatcher = null;
        }

        gscPLC.Dispose();
        gscPLC = null;
    }
}

// Helper function to load media channels
void LoadMediaChannels()
{
    mediaChannels.Clear();
    if (gscServer == null)
    {
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] LoadMediaChannels: gscServer is null");
        return;
    }

    Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] LoadMediaChannels: Starting channel query...");
    Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Server connected: {gscServer.IsConnected}");

    try
    {
        var channelList = new ArrayList();
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Calling MediaPlayerHelperFunctions.QueryMediaChannelList...");
        MediaPlayerHelperFunctions.QueryMediaChannelList(gscServer, out channelList);
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] QueryMediaChannelList returned, channelList is null: {channelList == null}");

        if (channelList != null)
        {
            Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Found {channelList.Count} total channels from server");

            foreach (GscMediaChannelData channel in channelList)
            {
                // Include ALL channels (both active and inactive)
                mediaChannels.Add(new MediaChannelInfo
                {
                    ChannelID = channel.ChannelID,
                    GlobalNumber = channel.GlobalNumber,
                    Name = channel.Name,
                    Description = channel.Desc,
                    IsActive = channel.IsActive
                });
                Console.WriteLine($"  - Channel {channel.ChannelID}: {channel.Name} (Active: {channel.IsActive})");
            }
        }
        else
        {
            Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] channelList is NULL!");
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Error loading media channels: {ex.Message}");
        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Stack trace: {ex.StackTrace}");
    }
}

// ============================================================================
// API ENDPOINTS
// ============================================================================

// Connection endpoint
app.MapPost("/connect", (ConnectRequest request) =>
{
    try
    {
        // Disconnect existing connection
        if (gscServer != null)
        {
            DestroyPLC();
            gscServer.Disconnect(5000);
            gscServer.Dispose();
            gscServer = null;
        }

        // Create new connection
        gscServer = new GscServer();

        // Encode password
        var encodedPassword = DBIHelperFunctions.EncodePassword(request.Password);

        // Set connection parameters
        using var connectParams = new GscServerConnectParams(request.Address, request.Username, encodedPassword);
        gscServer.SetConnectParams(connectParams);

        // Connect
        var result = gscServer.Connect();

        if (result == GscServerConnectResult.connectOk)
        {
            currentAddress = request.Address;
            currentUsername = request.Username;

            // Create PLC for actions/events
            CreatePLC();

            // Load media channels
            LoadMediaChannels();

            Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Connected to GeViScope at {request.Address}");

            return Results.Ok(new
            {
                success = true,
                message = "Connected to GeViScope",
                address = request.Address,
                username = request.Username,
                channelCount = mediaChannels.Count,
                connected_at = DateTime.UtcNow
            });
        }
        else
        {
            return Results.BadRequest(new
            {
                success = false,
                error = "Connection failed",
                message = result.ToString()
            });
        }
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new
        {
            success = false,
            error = "Connection error",
            message = ex.Message,
            stack_trace = ex.StackTrace
        });
    }
});

// Disconnect endpoint
app.MapPost("/disconnect", () =>
{
    try
    {
        DestroyPLC();

        if (gscServer != null)
        {
            gscServer.Disconnect(5000);
            gscServer.Dispose();
            gscServer = null;
        }

        currentAddress = null;
        currentUsername = null;
        mediaChannels.Clear();

        return Results.Ok(new
        {
            success = true,
            message = "Disconnected successfully"
        });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new
        {
            success = false,
            error = "Disconnect error",
            message = ex.Message
        });
    }
});

// Status endpoint
app.MapGet("/status", () =>
{
    return Results.Ok(new
    {
        is_connected = gscServer != null,
        address = currentAddress,
        username = currentUsername,
        channel_count = mediaChannels.Count
    });
});

// Get media channels
app.MapGet("/channels", () =>
{
    if (gscServer == null)
    {
        return Results.BadRequest(new { error = "Not connected" });
    }

    return Results.Ok(new
    {
        count = mediaChannels.Count,
        channels = mediaChannels
    });
});

// Refresh media channels
app.MapPost("/channels/refresh", () =>
{
    if (gscServer == null)
    {
        return Results.BadRequest(new { error = "Not connected" });
    }

    LoadMediaChannels();

    return Results.Ok(new
    {
        count = mediaChannels.Count,
        channels = mediaChannels
    });
});

// Send action (generic)
app.MapPost("/action", (ActionRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        Console.WriteLine($"[{DateTime.Now:HH:mm:ss}] Sending action: {request.Action}");

        var action = GscAction.Decode(request.Action);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            var logMsg = $"[{DateTime.Now:HH:mm:ss}] SENT: {request.Action}";
            receivedMessages.Add(logMsg);

            return Results.Ok(new
            {
                success = true,
                message = "Action sent",
                action = request.Action
            });
        }
        else
        {
            return Results.BadRequest(new
            {
                success = false,
                error = "Invalid action",
                message = "Could not decode action string"
            });
        }
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new
        {
            success = false,
            error = "Action error",
            message = ex.Message
        });
    }
});

// Send CustomAction
app.MapPost("/custom-action", (CustomActionRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var action = new GscAct_CustomAction(request.TypeId, request.Text ?? "");
        gscPLC.SendAction(action);
        action.Dispose();

        var logMsg = $"[{DateTime.Now:HH:mm:ss}] SENT: CustomAction({request.TypeId}, \"{request.Text}\")";
        receivedMessages.Add(logMsg);

        return Results.Ok(new
        {
            success = true,
            message = "CustomAction sent",
            type_id = request.TypeId,
            text = request.Text
        });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new
        {
            success = false,
            error = "CustomAction error",
            message = ex.Message
        });
    }
});

// CrossSwitch - video routing
app.MapPost("/crossswitch", (CrossSwitchRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var actionStr = $"CrossSwitch({request.VideoInput}, {request.VideoOutput}, {request.SwitchMode})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            var logMsg = $"[{DateTime.Now:HH:mm:ss}] SENT: {actionStr}";
            receivedMessages.Add(logMsg);

            return Results.Ok(new
            {
                success = true,
                message = "CrossSwitch sent",
                video_input = request.VideoInput,
                video_output = request.VideoOutput,
                switch_mode = request.SwitchMode
            });
        }
        else
        {
            return Results.BadRequest(new { success = false, error = "Failed to create CrossSwitch action" });
        }
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new
        {
            success = false,
            error = "CrossSwitch error",
            message = ex.Message
        });
    }
});

// PTZ Camera Control - Pan
app.MapPost("/camera/pan", (CameraPanRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var direction = request.Direction.ToLower() == "left" ? "Left" : "Right";
        var actionStr = $"CameraPan{direction}({request.Camera}, {request.Speed})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = $"Camera pan {direction}",
                camera = request.Camera,
                speed = request.Speed
            });
        }

        return Results.BadRequest(new { error = "Failed to create pan action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// PTZ Camera Control - Tilt
app.MapPost("/camera/tilt", (CameraTiltRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var direction = request.Direction.ToLower() == "up" ? "Up" : "Down";
        var actionStr = $"CameraTilt{direction}({request.Camera}, {request.Speed})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = $"Camera tilt {direction}",
                camera = request.Camera,
                speed = request.Speed
            });
        }

        return Results.BadRequest(new { error = "Failed to create tilt action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// PTZ Camera Control - Zoom
app.MapPost("/camera/zoom", (CameraZoomRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var direction = request.Direction.ToLower() == "in" ? "In" : "Out";
        var actionStr = $"CameraZoom{direction}({request.Camera}, {request.Speed})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = $"Camera zoom {direction}",
                camera = request.Camera,
                speed = request.Speed
            });
        }

        return Results.BadRequest(new { error = "Failed to create zoom action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// PTZ Camera Control - Stop all movement
app.MapPost("/camera/stop", (CameraStopRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var actionStr = $"CameraStopAll({request.Camera})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = "Camera stopped",
                camera = request.Camera
            });
        }

        return Results.BadRequest(new { error = "Failed to create stop action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// PTZ Camera Control - Go to preset
app.MapPost("/camera/preset", (CameraPresetRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var actionStr = $"CameraGotoPreset({request.Camera}, {request.Preset})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = $"Camera going to preset {request.Preset}",
                camera = request.Camera,
                preset = request.Preset
            });
        }

        return Results.BadRequest(new { error = "Failed to create preset action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// Digital Output - Close contact
app.MapPost("/digital-io/close", (DigitalContactRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var actionStr = $"CloseDigitalOutput({request.ContactId})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = "Digital output closed",
                contact_id = request.ContactId
            });
        }

        return Results.BadRequest(new { error = "Failed to create action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// Digital Output - Open contact
app.MapPost("/digital-io/open", (DigitalContactRequest request) =>
{
    try
    {
        if (gscServer == null || gscPLC == null)
        {
            return Results.BadRequest(new { error = "Not connected" });
        }

        var actionStr = $"OpenDigitalOutput({request.ContactId})";
        var action = GscAction.Decode(actionStr);
        if (action != null)
        {
            gscPLC.SendAction(action);
            action.Dispose();

            return Results.Ok(new
            {
                success = true,
                message = "Digital output opened",
                contact_id = request.ContactId
            });
        }

        return Results.BadRequest(new { error = "Failed to create action" });
    }
    catch (Exception ex)
    {
        return Results.BadRequest(new { error = ex.Message });
    }
});

// Get message log
app.MapGet("/messages", () =>
{
    return Results.Ok(new
    {
        count = receivedMessages.Count,
        messages = receivedMessages.TakeLast(100).ToList()
    });
});

// Clear message log
app.MapPost("/messages/clear", () =>
{
    receivedMessages.Clear();
    return Results.Ok(new { message = "Message log cleared" });
});

Console.WriteLine("========================================");
Console.WriteLine("GeViScope Bridge starting on port 7720");
Console.WriteLine("========================================");

app.Run("http://localhost:7720");

// Request/Response Models
record ConnectRequest(string Address, string Username, string Password);
record ActionRequest(string Action);
record CustomActionRequest(int TypeId, string? Text);
record CrossSwitchRequest(int VideoInput, int VideoOutput, int SwitchMode = 0);
record CameraPanRequest(int Camera, string Direction, int Speed = 50);
record CameraTiltRequest(int Camera, string Direction, int Speed = 50);
record CameraZoomRequest(int Camera, string Direction, int Speed = 50);
record CameraStopRequest(int Camera);
record CameraPresetRequest(int Camera, int Preset);
record DigitalContactRequest(int ContactId);

class MediaChannelInfo
{
    public long ChannelID { get; set; }
    public long GlobalNumber { get; set; }
    public string Name { get; set; } = "";
    public string Description { get; set; } = "";
    public bool IsActive { get; set; }
}