using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using ClaudeDo.Data.Models;
using ClaudeDo.Ui.Localization;
using ClaudeDo.Ui.Services;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

namespace ClaudeDo.Ui.ViewModels.Modals;

/// <summary>
/// Log Visualizer overlay — shows the worker's last 30 min of log records (all levels),
/// fetched once on open via <see cref="IWorkerClient.GetRecentLogsAsync"/> with a manual
/// Refresh and a "warnings &amp; errors only" filter.
/// </summary>
public sealed partial class LogVisualizerViewModel : ViewModelBase
{
    private readonly IWorkerClient _worker;
    private IReadOnlyList<WorkerLogEntry> _all = Array.Empty<WorkerLogEntry>();

    public ObservableCollection<LogVisualizerRow> Rows { get; } = new();

    [ObservableProperty] private bool _warnErrorOnly;
    [ObservableProperty] private string _statusText = "";

    public Action? CloseAction { get; set; }

    public LogVisualizerViewModel(IWorkerClient worker) => _worker = worker;

    [RelayCommand]
    public async Task RefreshAsync()
    {
        _all = await _worker.GetRecentLogsAsync();
        Apply();
    }

    partial void OnWarnErrorOnlyChanged(bool value) => Apply();

    private void Apply()
    {
        Rows.Clear();
        IEnumerable<WorkerLogEntry> items = WarnErrorOnly
            ? _all.Where(e => e.Level is WorkerLogLevel.Warn or WorkerLogLevel.Error)
            : _all;
        foreach (var e in items)
            Rows.Add(new LogVisualizerRow(e.TimestampUtc.ToLocalTime().ToString("HH:mm:ss"), e.Message, e.Level));
        StatusText = Rows.Count == 0
            ? Loc.T("modals.logVisualizer.empty")
            : Loc.T("modals.logVisualizer.count", Rows.Count);
    }

    [RelayCommand] private void Close() => CloseAction?.Invoke();
}

public sealed record LogVisualizerRow(string Time, string Message, WorkerLogLevel Level);