@page "/admin/areas/{Id:int}/edit"
@using ScadaLink.Security
@using ScadaLink.Commons.Entities.Instances
@using ScadaLink.Commons.Interfaces.Repositories
@attribute [Authorize(Policy = AuthorizationPolicies.RequireDesign)]
@inject ITemplateEngineRepository TemplateEngineRepository
@inject NavigationManager NavigationManager

<div class="container-fluid mt-3">
    <div class="d-flex align-items-center mb-3">
        <a href="/admin/areas" class="btn btn-outline-secondary btn-sm me-3">&larr; Back</a>
        <h4 class="mb-0">Edit Area</h4>
    </div>

    <ToastNotification @ref="_toast" />

    @if (_loading)
    {
        <LoadingSpinner IsLoading="true" />
    }
    else if (_errorMessage != null)
    {
        <div class="alert alert-danger">@_errorMessage</div>
    }
    else
    {
        <div class="card" style="max-width: 500px;">
            <div class="card-body">
                <div class="mb-3">
                    <label class="form-label small">Name</label>
                    <input type="text" class="form-control form-control-sm" @bind="_name" />
                </div>
                @if (_formError != null)
                {
                    <div class="text-danger small mb-2">@_formError</div>
                }
                <button class="btn btn-success btn-sm" @onclick="Save" disabled="@_saving">Save</button>
            </div>
        </div>
    }
</div>

@code {
    [Parameter] public int Id { get; set; }

    private Area? _area;
    private string _name = string.Empty;
    private string? _formError;
    private string? _errorMessage;
    private bool _loading = true;
    private bool _saving;

    private ToastNotification _toast = default!;

    protected override async Task OnInitializedAsync()
    {
        try
        {
            _area = await TemplateEngineRepository.GetAreaByIdAsync(Id);
            if (_area == null)
            {
                _errorMessage = $"Area #{Id} not found.";
            }
            else
            {
                _name = _area.Name;
            }
        }
        catch (Exception ex)
        {
            _errorMessage = $"Failed to load area: {ex.Message}";
        }
        _loading = false;
    }

    private async Task Save()
    {
        _formError = null;
        if (string.IsNullOrWhiteSpace(_name)) { _formError = "Name is required."; return; }

        _saving = true;
        try
        {
            _area!.Name = _name.Trim();
            await TemplateEngineRepository.UpdateAreaAsync(_area);
            await TemplateEngineRepository.SaveChangesAsync();
            NavigationManager.NavigateTo("/admin/areas");
        }
        catch (Exception ex)
        {
            _formError = $"Save failed: {ex.Message}";
        }
        _saving = false;
    }
}