@page "/admin/metadata"
@using System.Text.RegularExpressions
@using Iceshrimp.Backend.Components.Admin
@using Iceshrimp.Backend.Core.Extensions
@using Iceshrimp.Backend.Core.Services
@using Microsoft.AspNetCore.Components.Forms
@inherits AdminComponentBase

<AdminPageHeader Title="Instance metadata"/>

<p>Here you can adjust basic instance metadata. It gets displayed to all users, including guests.</p>

<EditForm FormName="update-metadata" Model="Model" OnSubmit="@OnSubmit" enctype="multipart/form-data">
    <label for="icon">Icon</label>
    <InputFile name="Model.IconFile" id="icon" accept="image/*"/>
    <label for="banner">Banner</label>
    <InputFile name="Model.BannerFile" id="banner" accept="image/*"/>
    <label for="name">Instance name</label>
    <InputText @bind-Value="@Model.Name" id="name" placeholder="Shrimp & friends"/>
    <label for="desc">Instance description</label>
    <InputTextArea @bind-Value="@Model.Description" id="desc" placeholder="Welcome to my instance!"/>
    <label for="theme-color">Theme color</label>
    <InputText @bind-Value="@Model.ThemeColor" id="theme-color" placeholder="#7b74cc"/>
    <label for="contact">Admin contact email</label>
    <InputText @bind-Value="@Model.AdminContact" type="email" id="contact" placeholder="webmaster@example.org"/>
    <button type="submit">Submit</button>
</EditForm>

@code {
    [Inject] public required DriveService      Drive      { get; set; }
    [Inject] public required MetaService       Meta       { get; set; }
    [Inject] public required SystemUserService SystemUser { get; set; }

    [SupplyParameterFromForm] private MetadataModel Model { get; set; } = null!;

    private class MetadataModel
    {
        public string?    Name         { get; set; }
        public string?    Description  { get; set; }
        public string?    AdminContact { get; set; }
        public string?    ThemeColor   { get; set; }
        public IFormFile? IconFile     { get; set; }
        public IFormFile? BannerFile   { get; set; }

        public void Canonicalize()
        {
            var colorRegex = new Regex(@"^#(?:[0-9a-f]{3}){1,2}$", RegexOptions.IgnoreCase);

            Name         = Name?.Trim();
            Description  = Description?.Trim();
            AdminContact = AdminContact?.Trim();
            ThemeColor   = ThemeColor?.Trim();

            if (Name?.Length == 0 || Name == "Iceshrimp.NET")
                Name = null;
            if (Description?.Length == 0)
                Description = null;
            if (AdminContact?.Length == 0)
                AdminContact = null;
            if (!colorRegex.IsMatch(ThemeColor ?? ""))
                ThemeColor = null;
            if (!IconFile?.ContentType.StartsWith("image/") ?? false)
                IconFile = null;
            if (!BannerFile?.ContentType.StartsWith("image/") ?? false)
                BannerFile = null;
        }
    }

    protected override void OnParametersSet()
    {
        // ReSharper disable once NullCoalescingConditionIsAlwaysNotNullAccordingToAPIContract
        Model ??= new MetadataModel();
    }

    protected override async Task OnGet()
    {
        (Model.Name, Model.Description, Model.AdminContact, Model.ThemeColor) =
            await Meta.GetManyAsync(MetaEntity.InstanceName, MetaEntity.InstanceDescription, MetaEntity.AdminContactEmail, MetaEntity.ThemeColor);
    }

    async Task OnSubmit()
    {
        Model.Canonicalize();
        await Meta.SetAsync(MetaEntity.InstanceName, Model.Name);
        await Meta.SetAsync(MetaEntity.InstanceDescription, Model.Description);
        await Meta.SetAsync(MetaEntity.AdminContactEmail, Model.AdminContact);
        await Meta.SetAsync(MetaEntity.ThemeColor, Model.ThemeColor);

        var ia = await SystemUser.GetInstanceActorAsync();
        if (Model.IconFile != null)
        {
            var req  = new DriveFileCreationRequest { Filename = Model.IconFile.Name, IsSensitive = false, MimeType = Model.IconFile.ContentType };
            var file = await Drive.StoreFileAsync(Model.IconFile.OpenReadStream(), ia, req);
            await Meta.SetAsync(MetaEntity.IconFileId, file.Id);
        }
        if (Model.BannerFile != null)
        {
            var req  = new DriveFileCreationRequest { Filename = Model.BannerFile.Name, IsSensitive = false, MimeType = Model.BannerFile.ContentType };
            var file = await Drive.StoreFileAsync(Model.BannerFile.OpenReadStream(), ia, req);
            await Meta.SetAsync(MetaEntity.BannerFileId, file.Id);
        }

        ReloadPage();
    }
}