@using System.Diagnostics
@using FluentValidation;
@using Somnia.GuestLog.Models.DTOs;
@using Somnia.GuestLog.Services;
@using Somnia.GuestLog.Validators;

@inject IDataListService dataListService;
@inject IValidator<StayEntryDTO> stayValidator;
@inject IDialogService dialogService;
@inject ISnackbar snackbar


<MudForm @ref="@_form" Model="@Model" Validation="@((stayValidator as StayEntryDTOValidator)!.ValidateValue)"
         ReadOnly="@ReadOnly">
    <MudGrid>
        <MudItem xs="12" xl=6>
            <MudPaper Class="pa-4" Elevation="3" Height="100%">
                <MudText Typo="Typo.subtitle1" Align="Align.Center">
                    @LanguageLocale.control_StayEntryForm_sectionDetails
                </MudText>
                <MudDivider DividerType="DividerType.Middle" Class="mb-4" />

                <MudStack Row style="@FieldMarginY">
                    <MudDatePicker @bind-Date="Model.DateIn" For="@(() => Model.DateIn)"
                                   Label="@LanguageLocale.dto_StayEntry_DateIn" Clearable OpenTo="OpenTo.Date" Editable />
                    <MudTimePicker @bind-Time="TimeIn" Label=" " Editable />
                    <MudDatePicker @bind-Date="Model.DateOut" For="@(() => Model.DateOut)"
                                   Label="@LanguageLocale.dto_StayEntry_DateOut" Clearable OpenTo="OpenTo.Date" Editable />
                    <MudTimePicker @bind-Time="TimeOut" Label=" " Editable />
                </MudStack>
                <MudStack Row style="@FieldMarginY">
                    <MudTextField @bind-Value="Model.RoomCount" For="@(() => Model.RoomCount)"
                                  Label="@LanguageLocale.dto_StayEntry_RoomCount" InputType="InputType.Number" FullWidth />
                    <MudTextField @bind-Value="Model.RoomNumber" For="@(() => Model.RoomNumber)"
                                  Label="@LanguageLocale.dto_StayEntry_RoomNumber" FullWidth />

                    <MudSelect @bind-Value="Model.PaymentMethod" For="@(() => Model.PaymentMethod)"
                               Label="@LanguageLocale.dto_StayEntry_PaymentMethod" FullWidth>
                        @foreach (string payment in PaymentMethodSet)
                        {
                            <MudSelectItem Value="payment">
                                @dataListService.GetLocalizedValue(GuestConsts.DataList_PaymentMethods, payment)
                            </MudSelectItem>
                        }
                    </MudSelect>
                </MudStack>
            </MudPaper>
        </MudItem>
        <MudItem xs="12" xl=6>
            <MudPaper Class="pa-4" Elevation="3" Height="100%" Width="100%">
                <MudText Typo="Typo.subtitle1" Align="Align.Center">
                    @LanguageLocale.control_StayEntryForm_sectionGuests
                </MudText>
                <MudDivider DividerType="DividerType.Middle" Class="mb-4" />

                @if (!ReadOnly)
                {
                    <MudStack Row style="@FieldMarginY">
                        <MudButton OnClick="BtnAddGuest" StartIcon="@Icons.Material.Filled.Add">
                            @LanguageLocale.control_StayEntryForm_btnAddGuest
                        </MudButton>
                    </MudStack>
                }

                <MudTable Items="@Model.GuestDocuments" Hover="true">
                    <HeaderContent>
                        <MudTh>@LanguageLocale.dto_GuestDocument_DocumentType</MudTh>
                        <MudTh>@LanguageLocale.dto_GuestDocument_DocumentNum</MudTh>
                        <MudTh>@LanguageLocale.dto_GuestDocument_Name</MudTh>
                        <MudTh>@LanguageLocale.dto_GuestDocument_Surname</MudTh>
                        <MudTh>@LanguageLocale.dto_GuestDocument_Surname2</MudTh>
                        @if (!ReadOnly)
                        {
                            <MudTh>@LanguageLocale.general_actions</MudTh>
                        }
                    </HeaderContent>
                    <RowTemplate>
                        <MudTd DataLabel="@LanguageLocale.dto_GuestDocument_DocumentType">
                            @context.DocumentType
                        </MudTd>
                        <MudTd DataLabel="@LanguageLocale.dto_GuestDocument_DocumentNum">
                            @context.DocumentNum
                        </MudTd>
                        <MudTd DataLabel="@LanguageLocale.dto_GuestDocument_Name">
                            @context.Name
                        </MudTd>
                        <MudTd DataLabel="@LanguageLocale.dto_GuestDocument_Surname" HideSmall="true">
                            @context.Surname
                        </MudTd>
                        <MudTd DataLabel="@LanguageLocale.dto_GuestDocument_Surname2" HideSmall="true">
                            @context.Surname2
                        </MudTd>
                        @if (!ReadOnly)
                        {
                            <MudTd DataLabel="@LanguageLocale.general_actions">
                                <MudIconButton Icon="@Icons.Material.Filled.Delete"
                                               OnClick="@(() => BtnDeleteGuest(context.DocumentType!, context.DocumentNum!))" />
                            </MudTd>
                        }
                    </RowTemplate>
                </MudTable>

            </MudPaper>
        </MudItem>
    </MudGrid>
</MudForm>

@code {
    [Parameter]
    public StayEntryDTO Model { private get; set; } = new();

    [Parameter]
    public bool ReadOnly { get; set; } = false;

    private TimeSpan? TimeIn = DateTime.Now.TimeOfDay;
    private TimeSpan? TimeOut = new(hours: 12, minutes: 0, seconds: 0);


    private MudForm _form = null!;

    private const string FieldMarginY = "margin-block: 0.5em";
    private IEnumerable<string> PaymentMethodSet
    {
        get
        {
            if (field is null)
            {
                field = dataListService.GetDataListByName(GuestConsts.DataList_PaymentMethods);
            }
            return field;
        }
    }


    protected override void OnInitialized()
    {
        Model.DateIn = DateTime.Today;
    }

    #region Public Methods

    public async Task<bool> ValidateForm()
    {
        await _form.ValidateAsync();

        if (Model.GuestDocuments is null || Model.GuestDocuments.Count == 0)
        {
            snackbar.Add("At least 1 guest is required!", MudBlazor.Severity.Warning);
            return false;
        }

        return _form.IsValid;
    }

    public StayEntryDTO GetModel()
    {
        //Update model times.
        Model.DateIn = GetDateTimeFromDateAndTime(Model.DateIn, TimeIn);
        Model.DateOut = GetDateTimeFromDateAndTime(Model.DateOut, TimeOut);

        return Model;
    }

    #endregion


    private static DateTime? GetDateTimeFromDateAndTime(DateTime? date, TimeSpan? time)
    {
        DateOnly? dateOnly = date is not null ? DateOnly.FromDateTime(date.Value) : null;
        TimeOnly? timeOnly = time is not null ? TimeOnly.FromTimeSpan(time.Value) : null;

        if (dateOnly is not null && timeOnly is not null)
        {
            return new DateTime(dateOnly.Value, timeOnly.Value);
        }

        return null;
    }

    #region Event Handlers

    private async Task BtnAddGuest()
    {
        var dialog = await dialogService.ShowAsync<GuestDocumentSearchDialog>();
        DialogResult? result = await dialog.Result;

        if (result is null || result.Canceled)
        {
            return;
        }

        GuestDocumentDTO? resultData = await dialog.GetReturnValueAsync<GuestDocumentDTO>();

        if (resultData is null)
        {
            snackbar.Add("Error! No Guest Document selected!", MudBlazor.Severity.Error);
            return;
        }

        //Check if this guest is already added.
        if (Model.GuestDocuments is not null && Model.GuestDocuments.Count > 0)
        {
            bool alreadyAdded = Model.GuestDocuments.Any(e => e.DocumentType == resultData.DocumentType
                && e.DocumentNum == resultData.DocumentNum);
            if (alreadyAdded)
            {
                snackbar.Add("GuestDocument already added!", MudBlazor.Severity.Warning);
                return;
            }
        }

        //Init List.
        if (Model.GuestDocuments is null)
        {
            Model.GuestDocuments = [];
        }

        Model.GuestDocuments.Add(resultData);
    }

    private void BtnDeleteGuest(string docType, string docNum)
    {
        Debug.Assert(Model.GuestDocuments is not null);

        //Filter out given GuestDocument from model.
        Model.GuestDocuments = Model.GuestDocuments
            .Where(e => !(e.DocumentType == docType && e.DocumentNum == docNum))
            .ToList();
    }

    #endregion

}