using System.Collections.ObjectModel;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using FieldLogger.Models;
using FieldLogger.Services;
using FieldLogger.Services.Data;

namespace FieldLogger.ViewModels;

public sealed partial class JobListItem : ObservableObject
{
    public required Job Job { get; init; }

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(JobSummary))]
    [NotifyPropertyChangedFor(nameof(DeleteDescription))]
    [NotifyPropertyChangedFor(nameof(AccessibilityDescription))]
    private int _pointCount;

    [ObservableProperty]
    [NotifyPropertyChangedFor(nameof(ActiveStatusLabel))]
    [NotifyPropertyChangedFor(nameof(ActiveActionLabel))]
    [NotifyPropertyChangedFor(nameof(ActiveActionDescription))]
    [NotifyPropertyChangedFor(nameof(AccessibilityDescription))]
    private bool _isActive;

    public string Name => Job.Name;
    public string CreatedLabel => Job.CreatedUtc.ToLocalTime().ToString("g");
    public string ActiveStatusLabel => IsActive ? "ACTIVE JOB" : "NOT ACTIVE";
    public string ActiveActionLabel => IsActive ? "Active" : "Set active";
    public string JobSummary => $"Created {CreatedLabel} · {PointCount} {(PointCount == 1 ? "point" : "points")}";
    public string ActiveActionDescription => IsActive
        ? $"{Name} is already the active job"
        : $"Make {Name} the active capture job";
    public string DeleteDescription => $"Delete {Name} and its {PointCount} saved points";
    public string AccessibilityDescription => $"{Name}. {ActiveStatusLabel}. {JobSummary}.";
}

public sealed partial class JobsViewModel : ObservableObject
{
    private readonly AppDatabase _database;
    private readonly SettingsService _settings;

    public ObservableCollection<JobListItem> Jobs { get; } = new();

    [ObservableProperty]
    private bool _isBusy;

    public JobsViewModel(AppDatabase database, SettingsService settings)
    {
        _database = database;
        _settings = settings;
    }

    [RelayCommand]
    public async Task RefreshAsync()
    {
        IsBusy = true;
        try
        {
            var jobs = await _database.GetJobsAsync();
            var activeId = _settings.ActiveJobId;

            Jobs.Clear();
            foreach (var job in jobs)
            {
                Jobs.Add(new JobListItem
                {
                    Job = job,
                    PointCount = await _database.GetPointCountAsync(job.Id),
                    IsActive = job.Id == activeId,
                });
            }
        }
        finally
        {
            IsBusy = false;
        }
    }

    [RelayCommand]
    private async Task NewJobAsync()
    {
        try
        {
            Console.WriteLine("NewJobAsync: Starting...");
            var name = await Shell.Current.DisplayPromptAsync("New Job", "Job name:",
                placeholder: $"Job {DateTime.Now:yyyy-MM-dd}");
            Console.WriteLine($"NewJobAsync: User entered: '{name}'");

            if (string.IsNullOrWhiteSpace(name))
            {
                Console.WriteLine("NewJobAsync: Name was empty, cancelling");
                return;
            }

            Console.WriteLine($"NewJobAsync: Creating job '{name.Trim()}'");
            var job = await _database.CreateJobAsync(name.Trim());
            Console.WriteLine($"NewJobAsync: Job created with ID {job.Id}");

            _settings.ActiveJobId = job.Id;
            Console.WriteLine($"NewJobAsync: Set active job to {job.Id}");

            await RefreshAsync();
            Console.WriteLine("NewJobAsync: Refresh complete");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"NewJobAsync: ERROR - {ex.Message}");
            Console.WriteLine($"NewJobAsync: Stack trace - {ex.StackTrace}");
        }
    }

    [RelayCommand]
    private async Task SetActiveAsync(JobListItem item)
    {
        _settings.ActiveJobId = item.Job.Id;
        foreach (var j in Jobs)
            j.IsActive = j.Job.Id == item.Job.Id;
        await Task.CompletedTask;
    }

    [RelayCommand]
    private Task OpenAsync(JobListItem item)
        => Shell.Current.GoToAsync($"jobdetail?jobId={item.Job.Id}");

    [RelayCommand]
    private async Task DeleteAsync(JobListItem item)
    {
        var confirmed = await Shell.Current.DisplayAlert("Delete Job",
            $"Delete \"{item.Job.Name}\" and its {item.PointCount} logged points?", "Delete", "Cancel");
        if (!confirmed)
            return;

        await _database.DeleteJobAsync(item.Job.Id);
        if (_settings.ActiveJobId == item.Job.Id)
            _settings.ActiveJobId = null;
        await RefreshAsync();
    }
}