using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.RazorPages;
using QuantEngine.Core.Interfaces;
using QuantEngine.Application.Interfaces;
using QuantEngine.Web.Services;

namespace QuantEngine.Web.Pages.Admin.Monitoring;

[Authorize(AuthenticationSchemes = AdminAuthDefaults.Scheme)]
public class IndexModel : PageModel
{
    private readonly ICollectionReadRepository _collectionRepository;
    private readonly ILogger<IndexModel> _logger;

    public List<CollectionRunRecord>? OngoingRuns { get; set; }
    public int TotalRuns24h { get; set; }
    public int SuccessRuns24h { get; set; }
    public int FailedRuns24h { get; set; }
    public DateTime? LastRefreshTime { get; set; }
    public List<CollectionErrorRecord>? RecentErrors { get; set; }
    public bool IsDatabaseConnected { get; set; }

    public IndexModel(ICollectionReadRepository collectionRepository, ILogger<IndexModel> logger)
    {
        _collectionRepository = collectionRepository;
        _logger = logger;
    }

    public async Task OnGetAsync()
    {
        try
        {
            LastRefreshTime = DateTime.UtcNow;

            var runs = await _collectionRepository.GetRecentRunsAsync(limit: 100);
            OngoingRuns = runs.Where(r => r.Status == "running").ToList();

            var last24h = DateTime.UtcNow.AddHours(-24);
            var runs24h = runs.Where(r =>
            {
                if (DateTime.TryParse(r.StartedAt?.ToString(), out var startedAt))
                    return startedAt >= last24h;
                return false;
            }).ToList();

            TotalRuns24h = runs24h.Count;
            SuccessRuns24h = runs24h.Count(r => r.Status == "completed" && r.TotalSnapshots > 0);
            FailedRuns24h = runs24h.Count(r => r.Status == "failed" || r.TotalSnapshots == 0);

            var allErrors = new List<CollectionErrorRecord>();
            foreach (var run in runs.Take(20))
            {
                try
                {
                    var errors = await _collectionRepository.GetRunErrorsAsync(run.RunId, limit: 5);
                    allErrors.AddRange(errors);
                }
                catch (Exception ex)
                {
                    _logger.LogWarning(ex, "Failed to load errors for run {RunId}", run.RunId);
                }
            }

            RecentErrors = allErrors.OrderByDescending(e => e.CreatedAt).Take(10).ToList();
            IsDatabaseConnected = true;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to load monitoring data");
            OngoingRuns = [];
            RecentErrors = [];
            IsDatabaseConnected = false;
        }
    }
}