nexus/backend/Controllers/NotificationsController.cs

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Nexus.Api.Data;
using Nexus.Api.Models;
using Nexus.Api.Services;

namespace Nexus.Api.Controllers;

[Authorize]
[ApiController]
[Route("api/dashboard/notifications")]
public class NotificationsController(INotificationService notificationService) : ControllerBase
{
    [HttpGet]
    public async Task<ActionResult<List<NotificationDto>>> GetNotifications(
        [FromQuery] string forUser = "bao",
        [FromQuery] int limit = 50,
        [FromQuery] bool unreadOnly = false,
        CancellationToken ct = default)
    {
        var notifications = await notificationService.GetForUserAsync(forUser, limit, unreadOnly, ct);
        return Ok(notifications.Select(MapToDto).ToList());
    }

    [HttpGet("unread-count")]
    public async Task<ActionResult<UnreadCountDto>> GetUnreadCount(
        [FromQuery] string forUser = "bao",
        CancellationToken ct = default)
    {
        var count = await notificationService.GetUnreadCountAsync(forUser, ct);
        return Ok(new UnreadCountDto(count));
    }

    [HttpGet("snapshot")]
    public async Task<ActionResult<NotificationSnapshotDto>> GetSnapshot(
        [FromQuery] string forUser = "bao",
        [FromQuery] int limit = 50,
        [FromQuery] bool unreadOnly = false,
        CancellationToken ct = default)
    {
        return Ok(await notificationService.GetSnapshotAsync(forUser, limit, unreadOnly, ct));
    }

    [HttpPatch("{id:guid}/read")]
    public async Task<ActionResult> MarkAsRead(Guid id, CancellationToken ct = default)
    {
        var ok = await notificationService.MarkAsReadAsync(id, ct);
        return ok ? NoContent() : NotFound(new { error = "Notification not found." });
    }

    [HttpPatch("read-all")]
    public async Task<ActionResult> MarkAllAsRead(
        [FromQuery] string forUser = "bao",
        CancellationToken ct = default)
    {
        var count = await notificationService.MarkAllAsReadAsync(forUser, ct);
        return Ok(new { marked = count });
    }

    private static NotificationDto MapToDto(Notification n) => new(
        n.Id, n.Type, n.Title, n.Message,
        n.ForUser, n.TaskId, n.IsRead, n.CreatedAt);
}