{{-- A file picker, in the text field's chrome (resources/views/components/field.blade.php).

     M3 has no file field, and building one would redo what the browser's input already does — the
     picker, a file dropped on it, the keyboard, what a screen reader announces, the `change` a
     Livewire upload listens for. So the input stays native, its label always floats (the button
     stands where a resting label would), and only its `::file-selector-button` is restyled: a tonal
     pill, so it reads as the thing to press (resources/css/components/file.css, on the field's
     chrome; the field's root carries `data-md-file`).

     The browser's own line beside the button ("No file chosen", "3 files") is drawn transparent:
     it cannot be truncated or wrapped, and the caller shows what was chosen anyway, as previews. A
     screen reader still hears it. The errors are the model's and, for a `multiple` input, each
     file's (`photos.*`): a file refused for its size belongs under this field as much as the
     batch's own count does. `label`, `hint`, `variant`; `full` takes the 40rem bound off a field its container already bounds. Every other attribute reaches the `<input>`. --}}

@props([
    'label' => null,
    'hint' => null,
    'variant' => null,
    'full' => false,
])

@php
    $model = $attributes->whereStartsWith('wire:model')->first();
    $id = $attributes->get('id') ?? 'field-'.substr(md5('file|'.$model.'|'.$label), 0, 12);
    // A plain form's field is named, not bound: its errors are under its name (`files[]` → `files`, `a[b]` → `a.b`).
    $errorKey = $model ?? (filled($attributes->get('name')) ? str_replace(['[]', '[', ']'], ['', '.', ''], (string) $attributes->get('name')) : null);
    $messages = $errorKey !== null && isset($errors)
        ? array_values(array_unique(\Illuminate\Support\Arr::flatten([$errors->get($errorKey), $errors->get($errorKey.'.*')])))
        : [];
@endphp

<x-livewire-material::field :$id :$label :$hint :$messages :$variant :$full floated :class="$attributes->get('class')" :style="$attributes->get('style')" data-md-file>
    <input
        {{ $attributes->except(['class', 'style', 'id', 'type']) }}
        type="file"
        id="{{ $id }}"
        @if ($messages !== []) aria-invalid="true" @endif
        @if ($messages !== [] || filled($hint)) aria-describedby="{{ $id }}-support" @endif
        data-md-field-control
    />
</x-livewire-material::field>