@page "/mod/emojis"
@using Iceshrimp.Frontend.Core.Services
@using Iceshrimp.Frontend.Localization
@using Microsoft.AspNetCore.Authorization
@using Microsoft.Extensions.Localization
@using Microsoft.AspNetCore.Components.Sections
@using Iceshrimp.Assets.PhosphorIcons
@using Iceshrimp.Frontend.Core.Miscellaneous
@using Iceshrimp.Shared.Schemas.Web
@using Iceshrimp.Frontend.Components
@attribute [Authorize(Roles = "moderator")]
@layout ModerationLayout
@inject ApiService                     Api;
@inject GlobalComponentSvc             Global;
@inject IJSRuntime                     Js;
@inject IStringLocalizer<Localization> Loc;

<SectionContent SectionName="top-bar">
    <Icon Name="Icons.Smiley"></Icon>
    @Loc["Custom Emojis"]
    @if (State is State.Empty or State.Loaded && Source == "local")
    {
        <span class="action btn" @onclick="OpenUpload" title="@Loc["Upload emoji"]">
            <Icon Name="Icons.Upload"/>
        </span>
        <span class="action btn" @onclick="OpenImport" title="@Loc["Import emoji pack"]">
            <Icon Name="Icons.FileArrowUp"/>
        </span>
    }
</SectionContent>

<div class="body">
    @if (State is State.Empty or State.Error or State.Loaded)
    {
        <div class="emoji-search">
            <input @bind="EmojiFilter" @bind:event="oninput" @bind:after="FilterEmojis" class="search" type="text"
                   placeholder="Search" aria-label="search"/>
            @if (Source == "remote")
            {
                <input @bind="HostFilter" @bind:event="oninput" @bind:after="FilterEmojis" class="search" type="text"
                       placeholder="Host" aria-label="host"/>
            }
            <select class="search-from" @bind="Source" @bind:after="GetEmojis">
                <option value="local">@Loc["Local"]</option>
                <option value="remote">@Loc["Remote"]</option>
            </select>
        </div>
    }
    @if (State is State.Loaded)
    {
        @foreach (var category in Categories)
        {
            <span class="category-name">@category.Key</span>
            <div class="emoji-list">
                @foreach (var emoji in category.Value)
                {
                    <EmojiManagementEntry Emoji="@emoji" Source="@Source" GetEmojis="GetEmojis"/>
                }
            </div>
        }
    }
    @if (State is State.Empty)
    {
        <i>This instance has no emojis</i>
    }
    @if (State is State.Loading)
    {
        <div class="loading">
            <LoadingSpinner Scale="2" />
        </div>
    }

    <div class="file-input">
        <InputFile @ref="UploadInput" OnChange="Upload" accept="image/*">Upload</InputFile>
        <InputFile @ref="ImportInput" OnChange="Import" accept=".zip">Import</InputFile>
    </div>
</div>

@code {
    private List<EmojiResponse>                     Emojis      { get; set; } = [];
    private Dictionary<string, List<EmojiResponse>> Categories  { get; set; } = new();
    private string                                  EmojiFilter { get; set; } = "";
    private string                                  HostFilter  { get; set; } = "";
    private string                                  Source      { get; set; } = "local";
    private State                                   State       { get; set; }
    private InputFile                               UploadInput { get; set; } = null!;
    private IBrowserFile                            UploadFile  { get; set; } = null!;
    private string                                  UploadName  { get; set; } = "";
    private InputFile                               ImportInput { get; set; } = null!;
    private IBrowserFile                            ImportFile  { get; set; } = null!;
    private IJSObjectReference                      _module = null!;

    private void FilterEmojis()
    {
        Categories = Emojis
                     .Where(p => p.Name.Contains(EmojiFilter.Trim()) || p.Aliases.Count(a => a.Contains(EmojiFilter.Trim())) != 0)
                     .OrderBy(p => p.Name)
                     .ThenBy(p => p.Id)
                     .GroupBy(p => p.Category)
                     .Where(p => Source == "local" || (Source == "remote" && (p.Key?.Contains(HostFilter) ?? false)))
                     .OrderBy(p => string.IsNullOrEmpty(p.Key))
                     .ThenBy(p => p.Key)
                     .ToDictionary(p => p.Key ?? "Other", p => p.ToList());
    }

    private async Task GetEmojis()
    {
        State = State.Loading;

        if (Source == "remote")
        {
            //TODO: impolement proper pagination
            var res = await Api.Emoji.GetRemoteEmojiAsync(new PaginationQuery());
            Emojis = res.Data;
        }
        else
        {
            Emojis = await Api.Emoji.GetAllEmojiAsync();
        }

        if (Emojis.Count == 0)
        {
            State = State.Empty;
        }
        else
        {
            FilterEmojis();
            State = State.Loaded;
        }
    }

    // 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);
    }

    private async Task OpenImport()
    {
        await _module.InvokeVoidAsync("openUpload", ImportInput.Element);
    }

    private async Task Upload(InputFileChangeEventArgs e)
    {
        if (!e.File.ContentType.StartsWith("image/")) return;
        UploadFile = e.File;
        await Global.PromptDialog?.Prompt(new EventCallback<string?>(this, UploadCallback), Loc["Set emoji name"], "", e.File.Name.Split(".")[0], buttonText: Loc["Upload"])!;
    }

    private async Task UploadCallback(string? name)
    {
        if (name == null) return;

        try
        {
            await Api.Emoji.UploadEmojiAsync(UploadFile, name);
            await Global.NoticeDialog?.Display(Loc["Successfully uploaded {0}", name])!;
            await GetEmojis();
        }
        catch (ApiException e)
        {
            await Global.NoticeDialog?.Display(e.Response.Message ?? Loc["An unknown error occurred"], NoticeDialog.NoticeType.Error)!;
        }
    }

    private async Task Import(InputFileChangeEventArgs e)
    {
        if (e.File.ContentType != "application/zip") return;
        ImportFile = e.File;
        await Global.ConfirmDialog?.Confirm(new EventCallback<bool>(this, ImportCallback), Loc["Import {0}?", e.File.Name], Icons.FileArrowUp, Loc["Import"])!;
    }

    private async Task ImportCallback(bool import)
    {
        if (!import) return;

        try
        {
            await Api.Emoji.ImportEmojiAsync(ImportFile);
            await Global.NoticeDialog?.Display(Loc["Successfully imported emoji pack"])!;
            await GetEmojis();
        }
        catch (ApiException e)
        {
            await Global.NoticeDialog?.Display(e.Response.Message ?? Loc["An unknown error occurred"], NoticeDialog.NoticeType.Error)!;
        }
    }

    protected override async Task OnInitializedAsync()
    {
        _module = await Js.InvokeAsync<IJSObjectReference>("import",
                                                           "./Pages/Moderation/CustomEmojis.razor.js");
        await GetEmojis();
    }
}