@page "/add"

@using OpenArchival.Blazor.Components.CustomComponents;
@using OpenArchival.Blazor.Components.Pages.Administration.Categories
@using OpenArchival.DataAccess;

<MudPaper Class="pa-4 ma-2 rounded" Elevation="3">
    <MudText Typo="Typo.h5" Color="Color.Primary">Add an Archive Item</MudText>

    <MudDivider DividerType="DividerType.Middle"></MudDivider>
    @if (!IsValid && _isFormDivVisible)
    {
        <MudAlert Severity="Severity.Error" Class="mt-4">
            All identifier fields must be filled in.
        </MudAlert>
    }

    <MudGrid Justify="Justify.Center" Class="pt-4">    
        <MudItem>
            <MudAutocomplete T="string" Label="Category" @bind-Value="Model.Category" @bind-Value:after=OnCategoryChanged SearchFunc="SearchCategory" CoerceValue=false CoerceText=false/>
        </MudItem>

        <MudItem>
            <MudFab Color="Color.Primary" StartIcon="@Icons.Material.Filled.Add" OnClick="OnAddCategoryClicked"/>
        </MudItem>
        
    </MudGrid>
</MudPaper>

<div @ref="_formDiv" style="@_formDivStyle">
    
    <MudPaper Class="pa-4 ma-2 rounded" Elevation="3">
        <MudText Typo="Typo.h6" Color="Color.Primary" Class="pt-4 pb-0">Archive Item Identifier</MudText>
        <MudDivider DividerType="DividerType.Middle"></MudDivider>
        <IdentifierTextBox @ref="_identifierTextBox" IdentifierFields="@Model.IdentifierFields"></IdentifierTextBox>
    </MudPaper>

    <MudPaper Class="pa-4 ma-2 rounded" Elevation="3">
        <UploadDropBox FilesUploaded="OnFilesUploaded" ClearClicked="OnClearFilesClicked"></UploadDropBox>
    </MudPaper>

    @foreach (FilePathListing listing in _filePathListings)
    {
       <ArchiveEntryCreatorCard FilePath="listing" OnValueChanged="OnChanged"></ArchiveEntryCreatorCard> 
    }
</div>

<MudGrid Justify="Justify.FlexEnd" Class="pt-6">
        <MudItem>
            <MudCheckBox Label="Publicly Visible" T="bool"></MudCheckBox>
            @*<MudCheckBox Label="Publicly Visible" T="bool" @bind-Value=Model.IsPublic></MudCheckBox>*@
        </MudItem>

        <MudItem Style="pr-0">
            <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="ml-4" OnClick="CancelClicked">Cancel</MudButton>
        </MudItem>

        <MudItem Style="pl-2">
            <MudButton Color="Color.Primary" Variant="Variant.Filled" Class="ml-4" OnClick="PublishClicked">Publish</MudButton>
        </MudItem>
    </MudGrid>

@using System.ComponentModel.DataAnnotations
@inject IDialogService DialogService
@inject NavigationManager NavigationManager;
@inject IArchiveCategoryProvider CategoryProvider;

@code {
    private IdentifierTextBox _identifierTextBox = default!;
    private ElementReference _formDiv = default!;

    private bool _isFormDivVisible = false;
    private string _formDivStyle => _isFormDivVisible ? "" : "display: none;";

    public List<string> DatesData { get; set; } = [];

    public List<ArchiveCategory> Categories { get; set; } = new();

    private List<FilePathListing> _filePathListings = new();

    private bool _categorySelected = false;

    //public List<IdentifierFieldValidationModel> IdentifierFields { get; set; } = [new IdentifierFieldValidationModel() { Name = "Field One", Value = "" }, new IdentifierFieldValidationModel() { Name = "Field Two", Value = "" }, new IdentifierFieldValidationModel() { Name = "Field Three", Value = "" }];

    public ArchiveItemValidationModel Model { get; set; } = new();

    public bool IsValid { get; set; } = false;
    /// <summary>
    /// The URI to navigate to if cancel is pressed
    /// </summary>
    public string? BackLink { get; set; } = "/";

    public string? ForwardLink { get; set; } = "/";

    private void CancelClicked(MouseEventArgs args)
    {
        if (BackLink is not null) {
            NavigationManager.NavigateTo(BackLink);
        }
        else
        {
            throw new ArgumentNullException("No back link provided for the add archive item page.");
        }
    }

    private async Task OnFilesUploaded(List<FilePathListing> args)
    {
        _filePathListings = args;
        StateHasChanged();
        await OnChanged();
    }

    private async Task OnClearFilesClicked()
    {
        _filePathListings = [];
        StateHasChanged();
        await OnChanged();
    }

    private void PublishClicked(MouseEventArgs args)
    {
        var validationContext = new ValidationContext(Model);
        var validationResult = new List<ValidationResult>();

        IsValid = Validator.TryValidateObject(Model, validationContext, validationResult);
        /*
        if (ForwardLink is not null)
        {
            if (IsValid)
            {
                NavigationManager.NavigateTo(ForwardLink);
            }
            else
            {
                StateHasChanged();
            }
        }
        else
        {
            throw new ArgumentNullException("No forward link provided for the add archive item page.");
        }

        // TODO: assign parents to all file path listings
        throw new NotImplementedException();
        */
    }

    async Task OnChanged()
    {
        var validationContext = new ValidationContext(Model);
        var validationResult = new List<ValidationResult>();

        IsValid = Validator.TryValidateObject(Model, validationContext, validationResult);
    }

    async Task OnCategoryChanged()
    {
        List<ArchiveCategory>? newCategory = await CategoryProvider.GetArchiveCategory(Model.Category);

        if (newCategory.Count != 1)
        {
            throw new ArgumentException(nameof(Model.Category), $"Got {newCategory.Count} rows for category name={Model.Category}"); 
        }
        if (newCategory is not null)
        {
            _identifierTextBox.VerifyFormatCategory = newCategory[0];
            _isFormDivVisible = true;
            StateHasChanged();
        }

        if (!_categorySelected)
        {
            _categorySelected = true;
            StateHasChanged();
        }

        await OnChanged();
    }

    public async Task OnAddCategoryClicked()
    { 
        var options = new DialogOptions { CloseOnEscapeKey = true, BackdropClick = false };
        var dialog = await DialogService.ShowAsync<CategoryCreatorDialog>("Create a Category", options);

        var result = await dialog.Result;

        if (result is not null && !result.Canceled)
        {
            await CategoryProvider.CreateCategoryAsync(CategoryValidationModel.ToArchiveCategory((CategoryValidationModel)result.Data));
            StateHasChanged();
            await OnChanged();
        }
    } 
    
    private async Task<IEnumerable<string>> SearchCategory(string value, CancellationToken cancellationToken)
    {
        List<ArchiveCategory> categories; 
        if (string.IsNullOrEmpty(value))
        {
            categories = new(await CategoryProvider.Top(25) ?? []); 
        } 
        else
        {
            categories = new((await CategoryProvider.Search(value) ?? []));
        }

        List<string> categoryStrings = [];
        foreach (var category in categories)
        {
            categoryStrings.Add(category.Name); 
        }

        return categoryStrings;
    }
    
}