<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Admin\Concerns\ScopedToTenant;
use App\Http\Controllers\Controller;
use App\Models\AuditLog;
use App\Models\Campaign;
use App\Models\Template;
use App\Signature\ImageLibrary;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

/** Écran « Images » : dépôt et suppression des logos et bannières (voir ImageLibrary pour les formats). */
class ImageController extends Controller
{
    use ScopedToTenant;

    public function __construct(private readonly ImageLibrary $library) {}

    public function index(): View
    {
        $images = $this->library->all()->map(fn (array $img) => $img + ['used_in' => $this->usages($img['name'])]);

        return view('admin.images.index', ['images' => $images, 'maxKb' => config('signature.image_max_kb')]);
    }

    public function store(Request $request): RedirectResponse
    {
        $request->validate([
            'image' => ['required', ...ImageLibrary::uploadRules()],
            'name' => ['nullable', 'string', 'max:80'],
        ], ImageLibrary::uploadMessages('image'));

        $name = $this->library->store($request->file('image'), $request->input('name'));
        AuditLog::record('admin', $this->actor(), 'image.upload', null, ['file' => $name], $this->tenantId());

        return back()->with('status', "Image « {$name} » en ligne. Dans un template : {{site_url}}/img/{$name}");
    }

    public function destroy(string $name): RedirectResponse
    {
        $name = basename($name);
        abort_unless($this->library->exists($name), 404);

        if ($used = $this->usages($name)) {
            return back()->withErrors(['image' => "« {$name} » est utilisée par : ".implode(', ', $used).'. Retirez-la d\'abord.']);
        }

        $this->library->delete($name);
        AuditLog::record('admin', $this->actor(), 'image.delete', null, ['file' => $name], $this->tenantId());

        return back()->with('status', "Image « {$name} » supprimée.");
    }

    /** Templates (publiés ou brouillons) et campagnes qui référencent l'image. */
    private function usages(string $name): array
    {
        $like = '%/img/'.$name.'%';
        $templates = Template::where('tenant_id', $this->tenantId())
            ->where(fn ($q) => $q->where('html_full', 'like', $like)->orWhere('html_short', 'like', $like)
                ->orWhere('draft_html_full', 'like', $like)->orWhere('draft_html_short', 'like', $like))
            ->pluck('name')->map(fn ($n) => "template {$n}");
        $campaigns = Campaign::where('tenant_id', $this->tenantId())->where('image_path', $name)
            ->pluck('name')->map(fn ($n) => "campagne {$n}");

        // La bibliothèque est commune à toutes les collectivités : une image utilisée ailleurs reste protégée.
        $elsewhere = Template::where('tenant_id', '!=', $this->tenantId())
            ->where(fn ($q) => $q->where('html_full', 'like', $like)->orWhere('html_short', 'like', $like)
                ->orWhere('draft_html_full', 'like', $like)->orWhere('draft_html_short', 'like', $like))->exists()
            || Campaign::where('tenant_id', '!=', $this->tenantId())->where('image_path', $name)->exists();

        return $templates->merge($campaigns)->when($elsewhere, fn ($c) => $c->push('une autre collectivité'))->all();
    }
}