@*
    SearchEdit.razor - Main search creation and editing page.

    Handles creating new searches, editing existing drafts, and viewing completed searches.
    Integrates with SignalR for real-time status updates during search execution.
*@
@page "/search"
@page "/search/{Id:int}"
@attribute [Authorize]
@using JdeScoping.Core.ApiContracts
@using JdeScoping.Client.Extensions
@using JdeScoping.Client.Auth
@using JdeScoping.Client.Components.Search
@using Microsoft.JSInterop
@inject ISearchApiClient SearchApi
@inject IHubConnectionService HubConnection
@inject IAuthStateProvider AuthStateProvider
@inject ISearchValidationService ValidationService
@inject ISearchSubmissionService SubmissionService
@inject NavigationManager NavigationManager
@inject DialogService DialogService
@inject NotificationService NotificationService
@inject IJSRuntime JSRuntime
@implements IDisposable

<PageTitle>@(_search.Id == 0 ? "New Search" : "Search") - JDE Scoping Tool</PageTitle>

<RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" JustifyContent="JustifyContent.SpaceBetween" class="rz-mb-4">
    <RadzenText TextStyle="TextStyle.H4" class="rz-m-0">Search</RadzenText>
    @if (!_search.IsReadOnly)
    {
        <RadzenButton Text="Submit" Icon="send" ButtonStyle="ButtonStyle.Primary" Click="@SubmitSearchAsync" IsBusy="@_isSubmitting" BusyText="Submitting..." class="btn-submit-blue" />
    }
</RadzenStack>

@if (_isLoading)
{
    <LoadingIndicator Message="Loading search..." />
}
else if (!string.IsNullOrEmpty(_errorMessage))
{
    <RadzenAlert AlertStyle="AlertStyle.Danger" ShowIcon="true" Variant="Variant.Flat" class="rz-mb-4">
        @_errorMessage
    </RadzenAlert>
}
else
{
    <SignalRStatusHandler SearchId="@_search.Id" OnStatusChanged="HandleSearchUpdate" />

    <FilterVisibilityManager @ref="_visibilityManager" Criteria="@_search.Criteria" OnSearchTypeChanged="OnSearchTypeChanged">
        <EditForm Model="@_search" OnValidSubmit="@HandleValidSubmit">
            <DataAnnotationsValidator />

            @if (_search.IsReadOnly)
            {
                <RadzenAlert AlertStyle="AlertStyle.Warning" ShowIcon="true" Variant="Variant.Flat" class="rz-mb-4">
                    <strong>Note:</strong> Search is read-only because it has already been submitted. To change or re-run the search again click the Copy button.
                    <RadzenButton Text="Copy" ButtonStyle="ButtonStyle.Secondary" Size="ButtonSize.Small" Click="@CopySearchAsync" class="rz-ml-2" />
                </RadzenAlert>
            }

            <ValidationSummary class="rz-mb-4" />

            <SearchDetailsSection
                Search="@_search"
                @bind-SelectedSearchType="@_visibilityManager.SelectedSearchType"
                ValidCombinations="@_visibilityManager.ValidCombinations"
                OnDownloadResults="@DownloadResultsAsync" />

            @if (_visibilityManager.ShowTimespan)
            {
                <TimeSpanFilterPanel @bind-MinimumDT="_search.Criteria.MinimumDt" @bind-MaximumDT="_search.Criteria.MaximumDt" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowWorkOrder)
            {
                <WorkOrderFilterPanel @bind-WorkOrders="_search.Criteria.WorkOrders" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowItemNumber)
            {
                <ItemNumberFilterPanel @bind-Items="_search.Criteria.Items" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowProfitCenter)
            {
                <ProfitCenterFilterPanel @bind-ProfitCenters="_search.Criteria.ProfitCenters" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowWorkCenter)
            {
                <WorkCenterFilterPanel @bind-WorkCenters="_search.Criteria.WorkCenters" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowComponentLot)
            {
                <ComponentLotFilterPanel @bind-ComponentLots="_search.Criteria.ComponentLots" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowOperator)
            {
                <OperatorFilterPanel @bind-Operators="_search.Criteria.Operators" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowItemOperationMis)
            {
                <PartOperationFilterPanel @bind-PartOperations="_search.Criteria.PartOperations" IsReadOnly="@_search.IsReadOnly" />
            }

            @if (_visibilityManager.ShowExtractMis)
            {
                <RadzenCard class="rz-mb-4">
                    <RadzenStack Orientation="Orientation.Horizontal" AlignItems="AlignItems.Center" Gap="0.5rem">
                        <RadzenCheckBox @bind-Value="_search.Criteria.ExtractMisData" Disabled="true" />
                        <RadzenText TextStyle="TextStyle.Body1">Extract MIS data</RadzenText>
                    </RadzenStack>
                </RadzenCard>
            }
        </EditForm>
    </FilterVisibilityManager>
}

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

    [SupplyParameterFromQuery(Name = "copySearchId")]
    public int? CopySearchId { get; set; }

    private ClientSearchViewModel _search = new() { Criteria = new() };
    private FilterVisibilityManager _visibilityManager = null!;

    private bool _isLoading = true;
    private bool _isSubmitting;
    private string? _errorMessage;

    protected override async Task OnInitializedAsync()
    {
        await LoadSearchAsync();
    }

    private async Task LoadSearchAsync()
    {
        _isLoading = true;
        _errorMessage = null;
        try
        {
            if (CopySearchId.HasValue)
            {
                var result = await SearchApi.CopySearchAsync(CopySearchId.Value);
                result.Switch(
                    copied =>
                    {
                        _search = copied.ToClient();
                        _search.Id = 0;
                        _search.Status = "New";
                    },
                    notFound => { _errorMessage = "Search to copy not found."; },
                    validation => { _errorMessage = FormatValidationErrors(validation.FieldErrors); },
                    unauthorized => { _errorMessage = "Session expired."; },
                    forbidden => { _errorMessage = "Access denied."; },
                    error => { _errorMessage = error.Message; }
                );
            }
            else if (Id.HasValue && Id.Value > 0)
            {
                var result = await SearchApi.GetSearchAsync(Id.Value);
                result.Switch(
                    loaded => { _search = loaded.ToClient(); },
                    notFound => { _errorMessage = "Search not found."; },
                    validation => { _errorMessage = FormatValidationErrors(validation.FieldErrors); },
                    unauthorized => { _errorMessage = "Session expired."; },
                    forbidden => { _errorMessage = "Access denied."; },
                    error => { _errorMessage = error.Message; }
                );
            }
            else
            {
                _search = new ClientSearchViewModel
                {
                    Status = "New",
                    UserName = await AuthStateProvider.GetUsernameAsync() ?? "",
                    Criteria = new SearchCriteriaViewModel()
                };
            }
        }
        finally
        {
            _isLoading = false;
        }
    }

    private static string FormatValidationErrors(IReadOnlyDictionary<string, string[]> fieldErrors)
    {
        var messages = fieldErrors.SelectMany(kv => kv.Value);
        return string.Join(" ", messages);
    }

    private void OnSearchTypeChanged(ValidCombination? combo)
    {
        StateHasChanged();
    }

    private void HandleSearchUpdate(SearchUpdateViewModel update)
    {
        _search.Status = update.Status;
        _search.SubmitDt = update.SubmitDt;
        _search.StartDt = update.StartDt;
        _search.EndDt = update.EndDt;
        StateHasChanged();
    }

    private async Task HandleValidSubmit()
    {
        var validationError = ValidationService.Validate(_search, _visibilityManager.SelectedSearchType, _visibilityManager);
        if (!string.IsNullOrEmpty(validationError))
        {
            NotificationService.Notify(NotificationSeverity.Error, "Validation Error", validationError);
            return;
        }

        await SubmitSearchInternalAsync();
    }

    private async Task SubmitSearchAsync()
    {
        var validationError = ValidationService.Validate(_search, _visibilityManager.SelectedSearchType, _visibilityManager);
        if (!string.IsNullOrEmpty(validationError))
        {
            NotificationService.Notify(NotificationSeverity.Error, "Validation Error", validationError);
            return;
        }

        await SubmitSearchInternalAsync();
    }

    private async Task SubmitSearchInternalAsync()
    {
        var confirmed = await DialogService.Confirm("Are you sure you want to submit the search?", "Confirm Submit", new ConfirmOptions
        {
            OkButtonText = "Submit",
            CancelButtonText = "Cancel"
        });

        if (confirmed != true)
        {
            return;
        }

        _isSubmitting = true;
        try
        {
            var result = await SubmissionService.SubmitAsync(_search);
            if (result.IsSuccess)
            {
                NavigationManager.NavigateTo($"/search/{result.SearchId}");
            }
            else
            {
                NotificationService.Notify(NotificationSeverity.Error, "Error", result.ErrorMessage);
            }
        }
        finally
        {
            _isSubmitting = false;
        }
    }

    private void CopySearchAsync()
    {
        NavigationManager.NavigateTo($"/search?copySearchId={_search.Id}");
    }

    private async Task DownloadResultsAsync()
    {
        var result = await SearchApi.GetResultsAsync(_search.Id);
        result.Switch(
            bytes =>
            {
                if (bytes.Length > 0)
                {
                    _ = Task.Run(async () =>
                    {
                        try
                        {
                            await JSRuntime.InvokeVoidAsync("downloadFile", $"search_results_{_search.Id}.xlsx", bytes);
                        }
                        catch (JSException ex)
                        {
                            Console.WriteLine($"JS interop failed during file download: {ex.Message}");
                        }
                    });
                    NotificationService.Notify(NotificationSeverity.Success, "Download", "Results downloaded successfully.");
                }
                else
                {
                    NotificationService.Notify(NotificationSeverity.Warning, "Download", "No results available to download.");
                }
            },
            notFound => { NotificationService.Notify(NotificationSeverity.Warning, "Download", "Results not found."); },
            validation => { NotificationService.Notify(NotificationSeverity.Error, "Error", FormatValidationErrors(validation.FieldErrors)); },
            unauthorized => { NotificationService.Notify(NotificationSeverity.Error, "Error", "Session expired."); },
            forbidden => { NotificationService.Notify(NotificationSeverity.Error, "Error", "Access denied."); },
            error => { NotificationService.Notify(NotificationSeverity.Error, "Error", error.Message); }
        );
    }

    public void Dispose()
    {
        // SignalRStatusHandler handles its own disposal
    }
}