using System.Net.WebSockets;
using CopilotCoordinator.Models;
using CopilotCoordinator.Services;

var builder = WebApplication.CreateBuilder(args);

// Configure port from config (default 8090)
var port = builder.Configuration.GetValue("Port", 8090);
builder.WebHost.UseUrls($"http://0.0.0.0:{port}");

// Register services
builder.Services.AddSingleton<WsBroadcaster>();
builder.Services.AddSingleton<LockManager>();
builder.Services.AddSingleton<SequenceRunner>();
builder.Services.AddHttpClient();

var app = builder.Build();

// Load sequence definitions from config file if present
var seqRunner = app.Services.GetRequiredService<SequenceRunner>();
var seqConfig = builder.Configuration.GetSection("Sequences");
if (seqConfig.Exists())
{
    var sequences = seqConfig.Get<List<SequenceDefinition>>() ?? new();
    var categories = builder.Configuration.GetSection("SequenceCategories").Get<List<SequenceCategory>>() ?? new();
    seqRunner.LoadSequences(sequences, categories);
}

// --- Lock expiration background timer (1 second, like legacy CameraLockExpirationWorker) ---
var lockManager = app.Services.GetRequiredService<LockManager>();
var expirationTimer = new PeriodicTimer(TimeSpan.FromSeconds(1));
_ = Task.Run(async () =>
{
    while (await expirationTimer.WaitForNextTickAsync())
    {
        try { await lockManager.CheckExpirations(); }
        catch (Exception ex)
        {
            app.Logger.LogError(ex, "Lock expiration check failed");
        }
    }
});

// --- WebSocket endpoint ---
app.UseWebSockets();
app.Map("/ws", async (HttpContext ctx) =>
{
    if (!ctx.WebSockets.IsWebSocketRequest)
    {
        ctx.Response.StatusCode = 400;
        return;
    }

    var keyboardId = ctx.Request.Query["keyboard"].FirstOrDefault() ?? "unknown";
    var ws = await ctx.WebSockets.AcceptWebSocketAsync();
    var clientId = Guid.NewGuid().ToString();
    var broadcaster = ctx.RequestServices.GetRequiredService<WsBroadcaster>();

    await broadcaster.HandleConnection(ws, clientId, keyboardId);
});

// --- Health & Status ---
app.MapGet("/health", () => Results.Ok(new { status = "ok", timestamp = DateTime.UtcNow }));

app.MapGet("/status", async (LockManager locks, SequenceRunner sequences, WsBroadcaster ws) =>
{
    var allLocks = await locks.GetAllLocks();
    var running = await sequences.GetRunning();
    var keyboards = ws.GetConnectedKeyboards();

    return Results.Ok(new
    {
        status = "ok",
        keyboards = keyboards.Count,
        keyboardList = keyboards,
        activeLocks = allLocks.Count,
        locks = allLocks,
        runningSequences = running.Count,
        sequences = running
    });
});

// --- Lock endpoints ---
app.MapPost("/locks/try", async (LockRequest req, LockManager mgr) =>
{
    var priority = Enum.TryParse<CameraLockPriority>(req.Priority, true, out var p) ? p : CameraLockPriority.Low;
    var result = await mgr.TryLock(req.CameraId, req.KeyboardId, priority);
    return Results.Ok(result);
});

app.MapPost("/locks/release", async (UnlockRequest req, LockManager mgr) =>
{
    await mgr.Unlock(req.CameraId, req.KeyboardId);
    return Results.Ok(new { success = true });
});

app.MapPost("/locks/takeover", async (TakeoverRequest req, LockManager mgr) =>
{
    var priority = Enum.TryParse<CameraLockPriority>(req.Priority, true, out var p) ? p : CameraLockPriority.Low;
    await mgr.RequestTakeover(req.CameraId, req.KeyboardId, priority);
    return Results.Ok(new { success = true });
});

app.MapPost("/locks/confirm", async (TakeoverConfirmRequest req, LockManager mgr) =>
{
    await mgr.ConfirmTakeover(req.CameraId, req.KeyboardId, req.Confirm);
    return Results.Ok(new { success = true });
});

app.MapPost("/locks/reset", async (ResetExpirationRequest req, LockManager mgr) =>
{
    await mgr.ResetExpiration(req.CameraId, req.KeyboardId);
    return Results.Ok(new { success = true });
});

app.MapGet("/locks", async (LockManager mgr) =>
{
    var locks = await mgr.GetAllLocks();
    return Results.Ok(locks);
});

app.MapGet("/locks/{keyboardId}", async (string keyboardId, LockManager mgr) =>
{
    var ids = await mgr.GetLockedCameraIds(keyboardId);
    return Results.Ok(ids);
});

// --- Sequence endpoints ---
app.MapPost("/sequences/start", async (SequenceStartRequest req, SequenceRunner runner) =>
{
    var result = await runner.Start(req.ViewerId, req.SequenceId);
    return result != null ? Results.Ok(result) : Results.NotFound(new { error = "Sequence not found" });
});

app.MapPost("/sequences/stop", async (SequenceStopRequest req, SequenceRunner runner) =>
{
    await runner.Stop(req.ViewerId);
    return Results.Ok(new { success = true });
});

app.MapGet("/sequences/running", async (SequenceRunner runner) =>
{
    var running = await runner.GetRunning();
    return Results.Ok(running);
});

app.MapGet("/sequences", (int? categoryId, SequenceRunner runner) =>
{
    var sequences = runner.GetSequences(categoryId);
    return Results.Ok(sequences);
});

app.MapGet("/sequences/categories", (SequenceRunner runner) =>
{
    return Results.Ok(runner.GetCategories());
});

app.Logger.LogInformation("COPILOT Coordinator starting on port {Port}", port);
app.Run();