using ManagerService.Data;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using NSwag.Annotations;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace ManagerService.Controllers
{
    [Authorize(Policy = ManagerService.Service.Security.Policies.SuperAdmin)]
    [ApiController, Route("api/[controller]")]
    [OpenApiTag("Audit", Description = "Audit trail — SuperAdmin only")]
    public class AuditController : ControllerBase
    {
        private readonly MyInfoMateDbContext _db;
        private readonly ILogger<AuditController> _logger;

        public AuditController(MyInfoMateDbContext db, ILogger<AuditController> logger)
        {
            _db = db;
            _logger = logger;
        }

        [HttpGet]
        public async Task<IActionResult> GetAuditLogs(
            [FromQuery] string? instanceId,
            [FromQuery] string? entityType,
            [FromQuery] string? userId,
            [FromQuery] DateTime? from,
            [FromQuery] DateTime? to,
            [FromQuery] int page = 1,
            [FromQuery] int limit = 50)
        {
            var query = _db.AuditLogs.AsQueryable();

            if (!string.IsNullOrEmpty(instanceId))
                query = query.Where(a => a.InstanceId == instanceId);

            if (!string.IsNullOrEmpty(entityType))
                query = query.Where(a => a.EntityType == entityType);

            if (!string.IsNullOrEmpty(userId))
                query = query.Where(a => a.UserId == userId);

            if (from.HasValue)
                query = query.Where(a => a.Timestamp >= from.Value);

            if (to.HasValue)
                query = query.Where(a => a.Timestamp <= to.Value);

            var total = await query.CountAsync();
            var items = await query
                .OrderByDescending(a => a.Timestamp)
                .Skip((page - 1) * limit)
                .Take(limit)
                .ToListAsync();

            return Ok(new { total, page, limit, items });
        }
    }
}