@attribute [Route($"{GuestConsts.Page_GuestDocs_New}")]

@using Somnia.GuestLog.Models.DTOs;
@using Somnia.GuestLog.Services;
@using Somnia.GuestLog.Validators;

@inject ISnackbar Snackbar
@inject IDialogService DialogService
@inject NavigationManager Navigation
@inject IGuestDocumentService guestDocService
@inject IDataListService dataListService;

@inject FluentValidation.IValidator<GuestDocIdDTO> docIdValidator;


<PageTitle>Somnia - Guest Docs - New</PageTitle>

<MudStack Row="true" Class="my-4">
    <MudText Typo="Typo.h4" GutterBottom="true">New Guest Document</MudText>
    <MudSpacer />
    <MudButton Variant="Variant.Filled" Color="Color.Success" Size="Size.Small" StartIcon="@Icons.Material.Filled.Add"
               OnClick="() => BtnSaveNewGuest()">
        @LanguageLocale.general_btnCreate
    </MudButton>
    <MudButton Variant="Variant.Filled" Color="Color.Default" Size="Size.Small"
               StartIcon="@Icons.Material.Filled.ArrowBack" OnClick="() => BtnReturn()">
        @LanguageLocale.general_btnReturn
    </MudButton>
</MudStack>

@if (currentPageMode == ePageMode.selectDocId || currentPageMode == ePageMode.alreadyExistDoc)
{
    <MudPaper Class="pa-4" Elevation="3" Height="100%" Style="">
        <MudForm @ref="_docIdForm" Model="@currentDocId"
                 Validation="@((docIdValidator as GuestDocIdDTOValidator)!.ValidateValue)">
            <MudStack Breakpoint="Breakpoint.Sm">
                <MudSelect @bind-Value="currentDocId.DocumentType" For="@(() => currentDocId.DocumentType)"
                           Label="@LanguageLocale.dto_GuestDocument_DocumentType" Immediate="true" Required>

                    @foreach (string docType in dataListService.GetDataListByName(GuestConsts.DataList_DocumentTypes))
                    {
                        <MudSelectItem Value="docType">
                            @dataListService.GetLocalizedValue(GuestConsts.DataList_DocumentTypes, docType)
                        </MudSelectItem>
                    }

                </MudSelect>
                <MudTextField @bind-Value="currentDocId.DocumentNum" For="@(() => currentDocId.DocumentNum)"
                              Label="@LanguageLocale.dto_GuestDocument_DocumentNum" Required
                              OnBlur="@(() => currentDocId.DocumentNum = currentDocId.DocumentNum.ToUpper())" />
                <MudButton Variant="Variant.Filled" Color="Color.Primary" Size="Size.Small"
                           StartIcon="@Icons.Material.Filled.Search" OnClick="() => BtnCheckDocId()" Disabled="@loadingDocId">
                    @LanguageLocale.general_btnSearch
                </MudButton>
            </MudStack>
        </MudForm>

        @if (currentPageMode == ePageMode.alreadyExistDoc)
        {
            <MudStack>
                <MudDivider Class="my-4" />
                <MudText Typo="Typo.body1" Style="text-align: center;">@LanguageLocale.page_GuestDocNew_msgAlreadyExists
                </MudText>
                <MudButton Variant="Variant.Filled" Color="Color.Primary" Size="Size.Small"
                           StartIcon="@Icons.Material.Filled.Search" OnClick="() => BtnGoToDocument()">
                    @LanguageLocale.page_GuestDocNew_btnGoExistingDoc
                </MudButton>
            </MudStack>
        }
    </MudPaper>
}

@if (currentPageMode == ePageMode.createNew)
{
    <GuestDocForm @ref="_form" Model="newDocumentModel" />
}


@code {
    GuestDocForm _form = null!;
    MudForm _docIdForm = null!;

    ePageMode currentPageMode = ePageMode.selectDocId;
    GuestDocIdDTO currentDocId = new() { DocumentNum = "", DocumentType = "" };
    GuestDocumentDTO newDocumentModel = new();

    bool loadingDocId = false;

    #region Event Handlers

    /// <summary>
    /// Check if given Document already exists or can be created.
    /// </summary>
    private async Task BtnCheckDocId()
    {
        await _docIdForm.ValidateAsync();
        if (!_docIdForm.IsValid)
        {
            return;
        }

        loadingDocId = true;
        GuestDocumentDTO? dto = await guestDocService.GetDtoByIdAsync(currentDocId.DocumentType, currentDocId.DocumentNum);
        loadingDocId = false;

        if (dto is null)
        {
            //Document don't exist -> Create it.
            currentPageMode = ePageMode.createNew;

            //Update model with current DocId
            newDocumentModel.DocumentType = currentDocId.DocumentType;
            newDocumentModel.DocumentNum = currentDocId.DocumentNum;

            return;
        }

        //GuestDoc already exists!
        currentPageMode = ePageMode.alreadyExistDoc;
    }

    private void BtnReturn()
    {
        Navigation.NavigateTo(GuestConsts.Page_GuestDocs_List);
    }

    private async Task BtnSaveNewGuest()
    {
        bool isFormValid = await _form.ValidateForm();
        if (!isFormValid)
        {
            Snackbar.Add("Invalid Form!", Severity.Error);
            return;
        }

        GuestDocumentDTO model = _form.Model;

        Snackbar.Add($"Document '{model.DocumentNum}' creating...", Severity.Info);

        //Show Loading dialog...
        var loadingDialog = await DialogService.ShowAsync<LoadingDialog>();

        bool isCreated = await guestDocService.CreateDocumentAsync(model);
        if (!isCreated)
        {
            Snackbar.Add($"Error creating Document '{model.DocumentNum}'", Severity.Error);
            loadingDialog.Close();
            return;
        }

        Snackbar.Add($"Document '{model.DocumentNum}' Created!", Severity.Success);
        Navigation.NavigateTo(GuestConsts.Page_GuestDocs_List);
    }

    private void BtnGoToDocument()
    {
        if (currentPageMode != ePageMode.alreadyExistDoc)
        {
            Snackbar.Add("Invalid operation!", Severity.Error);
            return;
        }

        string docId = GuestDocIdDTO.EncodeAsString(currentDocId);
        string uri = GuestConsts.Page_GuestDocs_Detail.Replace("{docId}", docId);
        Navigation.NavigateTo(uri);
    }

    #endregion

    #region Models

    enum ePageMode
    {
        selectDocId, alreadyExistDoc, createNew
    }

    #endregion
}