@using FParsec
@using Iceshrimp.Assets.PhosphorIcons
@using Iceshrimp.Frontend.Core.Services
@using Iceshrimp.Shared.Schemas
@using Iceshrimp.Frontend.Components.Note
@inject IJSRuntime     Js
@inject ApiService     ApiService
@inject ComposeService ComposeService
<dialog class="compose" @ref="Dialog">
    <div class="header">
        <button @onclick="CloseDialog">
            <Icon Name="Icons.X"/>
        </button>
        <Dropdown TBind="NoteVisibility" Elements="@DropDownCreate()" @bind-Value="NoteDraft.Visibility"/>
        <button @onclick="SendNote" class="post-btn">Post<Icon Name="Icons.PaperPlaneRight"/></button>
    </div>
    @if (ReplyOrQuote != null)
    {
        <div class="reply-or-quote">
            <NoteComponent Note="ReplyOrQuote" AsQuote="true"/>
        </div>
    }
    @if (NoteDraft.Cw != null)
    {
        <input @bind="NoteDraft.Cw" class="input cw-field" placeholder="Content Warning"/>
        <hr class="separator"/>
    }
    <textarea @bind="NoteDraft.Text" class="textarea" placeholder="@TextPlaceholder" rows="5" cols="35"></textarea>
    <div class="footer">
        <button class="footer-btn" @onclick="OpenUpload">
            <Icon Name="Icons.Upload" Size="1.3rem"></Icon>
        </button>
        <button class="footer-btn" @onclick="ToggleCw">
            <Icon Name="Icons.EyeSlash" Size="1.3rem"></Icon>
        </button>
        <div class="file-input">
            <InputFile @ref="UploadInput" OnChange="Upload">Upload!</InputFile>
        </div>
    </div>
</dialog>

@code {
    private ElementReference         Dialog { get; set; }
    private IJSObjectReference?      _module;
    private IList<DriveFileResponse> Attachments     { get; set; } = [];
    private InputFile                UploadInput     { get; set; }
    private NoteBase?                ReplyOrQuote    { get; set; }
    private string?                  TextPlaceholder { get; set; }
    private NoteCreateRequest NoteDraft { get; set; } = new NoteCreateRequest
    {
        Text       = "",
        Visibility = NoteVisibility.Followers, // FIXME: Default to visibilty in settings
        Cw         = null
    };
    private Dictionary<string, string> AvailablePlaceholders { get; set; } = new()
    {
        { "default", "What's on your mind?" },
        { "reply", "Reply goes here!" },
        { "quote", "Quote this post!" } 
        
    };

    RenderFragment DropdownIcon(NoteVisibility vis)
    {
        return vis switch
        {
            NoteVisibility.Public => (@<Icon Name="Icons.Globe"/>),
            NoteVisibility.Home => (@<Icon Name="Icons.House"/>),
            NoteVisibility.Followers => (@<Icon Name="Icons.Lock"/>),
            NoteVisibility.Specified => (@<Icon Name="Icons.Envelope"/>),
            _ => throw new ArgumentOutOfRangeException()
        };
    }

    RenderFragment DropdownContent(NoteVisibility vis)
    {
        return vis switch
        {
            NoteVisibility.Public => (@<span class="dropdown-title">Public</span>),
            NoteVisibility.Home => (@<span class="dropdown-title">Unlisted</span>),
            NoteVisibility.Followers => (@<span class="dropdown-title">Followers</span>),
            NoteVisibility.Specified => (@<span class="dropdown-title">Direct</span>),
            _ => throw new ArgumentOutOfRangeException()
        };
    }

    private IList<DropdownElement<NoteVisibility>> DropDownCreate()
    {
        return Enum.GetValues<NoteVisibility>()
                   .Select(vis =>
                               new DropdownElement<NoteVisibility> { Icon = DropdownIcon(vis), Content = DropdownContent(vis), Selection = vis })
                   .ToList();
    }

    // The <InputFile> Component is hidden, and triggered by a sepperate button.
    // That way we get it's functionality, without the styling limitations of the InputFile component
    private async Task OpenUpload()
    {
        await _module.InvokeVoidAsync("openUpload", UploadInput.Element);
    }

    public async Task OpenDialog(NoteBase? replyTo = null, NoteBase? quote = null)
    {
        if (replyTo != null)
        {
            ResetState();
            ReplyOrQuote         = replyTo;
            NoteDraft.ReplyId    = replyTo.Id;
            NoteDraft.Visibility = replyTo.Visibility;
            TextPlaceholder      = AvailablePlaceholders["reply"];
            StateHasChanged();
        }
        else if (quote != null)
        {
            ResetState();
            ReplyOrQuote         = quote;
            NoteDraft.RenoteId   = quote.Id;
            NoteDraft.Visibility = quote.Visibility;
            TextPlaceholder      = AvailablePlaceholders["quote"];
            StateHasChanged();
        }
        else
        {
            ResetState();
            StateHasChanged();
        }

        await _module.InvokeVoidAsync("openDialog", Dialog);
    }

    private void ResetState()
    {
        ReplyOrQuote    = null;
        Attachments     = new List<DriveFileResponse>();
        NoteDraft       = new NoteCreateRequest { Text = "", Visibility = NoteVisibility.Followers, Cw = null };
        TextPlaceholder = AvailablePlaceholders["default"];
    }

    private async Task CloseDialog()
    {
        await _module.InvokeVoidAsync("closeDialog", Dialog);
    }

    private async Task SendNote()
    {
        if (Attachments.Count > 0)
        {
            NoteDraft.MediaIds = Attachments.Select(x => x.Id).ToList();
        }

        await ApiService.Notes.CreateNote(NoteDraft);
        await CloseDialog();
        // FIXME: Implement timeline refresh and call it here.
    }

    private void ToggleCw()
    {
        NoteDraft.Cw = NoteDraft.Cw == null ? "" : null;
    }

    private async Task Upload(InputFileChangeEventArgs e)
    {
        Console.WriteLine(e.File.Size);
        var res = await ApiService.Drive.UploadFile(e.File);
        Console.WriteLine(res.Id);
        Attachments.Add(res);
    }

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            _module = await Js.InvokeAsync<IJSObjectReference>("import",
                                                               "./Components/Compose.razor.js");
            ComposeService.ComposeDialog = this;
        }
    }

    protected override void OnInitialized()
    {
        TextPlaceholder = AvailablePlaceholders["default"];
    }

}