using RobotNet10.RobotApp.Shared.DockStation;

namespace RobotNet10.RobotApp.Client.Services;

public class DockStationConfigState(DockStationApiService apiService)
{
    public List<DockStationConfigSummaryDto> Configs { get; private set; } = [];
    public DockStationConfigDto? SelectedConfig { get; private set; }
    public bool IsLoading { get; private set; }
    public bool IsSaving { get; private set; }
    public string? ErrorMessage { get; private set; }

    public event Action? OnStateChanged;

    public async Task LoadConfigsAsync()
    {
        IsLoading = true;
        ErrorMessage = null;
        NotifyStateChanged();
        try
        {
            Configs = await apiService.GetAllAsync();
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            Configs = [];
        }
        IsLoading = false;
        NotifyStateChanged();
    }

    public async Task SelectConfigAsync(Guid id)
    {
        IsLoading = true;
        ErrorMessage = null;
        NotifyStateChanged();
        try
        {
            SelectedConfig = await apiService.GetByIdAsync(id);
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            SelectedConfig = null;
        }
        IsLoading = false;
        NotifyStateChanged();
    }

    public void ClearSelection()
    {
        SelectedConfig = null;
        NotifyStateChanged();
    }

    public async Task<DockStationConfigDto> CreateConfigAsync(CreateDockStationConfigRequest request)
    {
        IsSaving = true;
        ErrorMessage = null;
        NotifyStateChanged();
        try
        {
            var result = await apiService.CreateAsync(request);
            await LoadConfigsAsync();
            SelectedConfig = result;
            return result;
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            throw;
        }
        finally
        {
            IsSaving = false;
            NotifyStateChanged();
        }
    }

    public async Task UpdateConfigAsync(Guid id, UpdateDockStationConfigRequest request)
    {
        IsSaving = true;
        ErrorMessage = null;
        NotifyStateChanged();
        try
        {
            SelectedConfig = await apiService.UpdateAsync(id, request);
            await LoadConfigsAsync();
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            throw;
        }
        finally
        {
            IsSaving = false;
            NotifyStateChanged();
        }
    }

    public async Task DeleteConfigAsync(Guid id)
    {
        IsSaving = true;
        ErrorMessage = null;
        NotifyStateChanged();
        try
        {
            await apiService.DeleteAsync(id);
            if (SelectedConfig?.Id == id) ClearSelection();
            await LoadConfigsAsync();
        }
        catch (Exception ex)
        {
            ErrorMessage = ex.Message;
            throw;
        }
        finally
        {
            IsSaving = false;
            NotifyStateChanged();
        }
    }

    private void NotifyStateChanged() => OnStateChanged?.Invoke();
}