<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\ClientCategory;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;

class ClientCategoryController extends Controller
{
    public function index(): \Illuminate\View\View
    {
        $categories = ClientCategory::with('children', 'parent')
            ->withCount('clients')
            ->orderBy('sort_order')
            ->get();

        $parents = ClientCategory::whereNull('parent_id')
            ->orderBy('sort_order')
            ->get();

        return view('categories.index', compact('categories', 'parents'));
    }

    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'name'      => 'required|string|max:100',
            'parent_id' => 'nullable|exists:client_categories,id',
            'icon'      => 'nullable|string|max:10',
            'color'     => 'nullable|string|max:20',
        ]);

        // Auto slug
        $validated['slug'] = \Illuminate\Support\Str::slug($validated['name']);

        // If slug conflicts, suffix with random
        if (ClientCategory::where('slug', $validated['slug'])->exists()) {
            $validated['slug'] .= '-' . substr(uniqid(), -4);
        }

        ClientCategory::create($validated);

        return back()->with('success', '🏷️ Category added!');
    }

    public function quickStore(Request $request): \Illuminate\Http\JsonResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:100',
        ]);

        $validated['slug'] = \Illuminate\Support\Str::slug($validated['name']);
        if (ClientCategory::where('slug', $validated['slug'])->exists()) {
            $validated['slug'] .= '-' . substr(uniqid(), -4);
        }

        $category = ClientCategory::create($validated);

        return response()->json(['id' => $category->id, 'name' => $category->name, 'icon' => '🏷️']);
    }

    public function update(Request $request, ClientCategory $category): RedirectResponse
    {
        $validated = $request->validate([
            'name'      => 'required|string|max:100',
            'parent_id' => 'nullable|exists:client_categories,id',
            'icon'      => 'nullable|string|max:10',
            'color'     => 'nullable|string|max:20',
        ]);

        // Prevent a category from being its own parent
        if (isset($validated['parent_id']) && $validated['parent_id'] == $category->id) {
            $validated['parent_id'] = null;
        }

        $category->update($validated);

        return back()->with('success', '🏷️ Category updated!');
    }

    public function destroy(ClientCategory $category): RedirectResponse
    {
        // Reassign children to the parent
        $category->children()->update(['parent_id' => $category->parent_id]);
        // Detach clients
        $category->clients()->update(['category_id' => null]);

        $category->delete();

        return back()->with('success', '🏷️ Category removed.');
    }
}