@using Microsoft.AspNetCore.Components.Forms
@using SharepointToolbox.Web.Core.Models

@* Reusable logo picker. Reads an image into a base64 LogoData (no disk/blob storage). *@
<div class="logo-upload">
    @if (Value is not null)
    {
        <div class="flex-row" style="gap:12px;align-items:center">
            <img src="data:@Value.MimeType;base64,@Value.Base64" alt=""
                 style="max-height:60px;max-width:200px;object-fit:contain;border:1px solid var(--border);border-radius:4px;padding:4px;background:#fff" />
            <button type="button" class="btn btn-secondary btn-sm" @onclick="Remove">Remove</button>
        </div>
    }
    else
    {
        <InputFile OnChange="OnChange" accept="image/png,image/jpeg,image/svg+xml,image/gif" />
        <small class="text-muted d-block">PNG, JPEG, SVG or GIF — max @(MaxBytes / 1024) KB.</small>
    }
    @if (!string.IsNullOrEmpty(_error)) { <div class="alert alert-error mt-8">@_error</div> }
</div>

@code {
    [Parameter] public LogoData? Value { get; set; }
    [Parameter] public EventCallback<LogoData?> ValueChanged { get; set; }

    /// <summary>Upload size cap. Logos are stored inline as base64 in JSON, so keep small.</summary>
    [Parameter] public long MaxBytes { get; set; } = 512 * 1024;

    private string _error = string.Empty;

    private async Task OnChange(InputFileChangeEventArgs e)
    {
        _error = string.Empty;
        var file = e.File;
        if (file is null) return;

        if (file.Size > MaxBytes)
        {
            _error = $"File too large ({file.Size / 1024} KB). Max {MaxBytes / 1024} KB.";
            return;
        }

        try
        {
            using var ms = new MemoryStream();
            await file.OpenReadStream(MaxBytes).CopyToAsync(ms);
            var mime = string.IsNullOrWhiteSpace(file.ContentType) ? "image/png" : file.ContentType;
            var logo = new LogoData { Base64 = Convert.ToBase64String(ms.ToArray()), MimeType = mime };
            Value = logo;
            await ValueChanged.InvokeAsync(logo);
        }
        catch (Exception ex)
        {
            _error = $"Could not read image: {ex.Message}";
        }
    }

    private async Task Remove()
    {
        Value = null;
        _error = string.Empty;
        await ValueChanged.InvokeAsync(null);
    }
}