<?php

namespace Modules\Menus\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;
use Illuminate\View\View;
use JsonException;
use Modules\Menus\Models\Menu;

final class MenuController extends Controller
{
    public function index(): View
    {
        return view('menus::admin.index', ['records' => Menu::query()->orderBy('location')->paginate(30)]);
    }

    public function create(): View
    {
        return view('menus::admin.form', ['locations' => $this->locations()]);
    }

    public function store(Request $request): RedirectResponse
    {
        Menu::create($this->validated($request));

        return redirect()->route('administration.menus.index')->with('status', 'Menu created. Every header or footer using this location has been updated.');
    }

    public function edit(Menu $menu): View
    {
        return view('menus::admin.form', ['record' => $menu, 'locations' => $this->locations()]);
    }

    public function update(Request $request, Menu $menu): RedirectResponse
    {
        $menu->update($this->validated($request));

        return redirect()->route('administration.menus.index')->with('status', 'Menu updated everywhere it is used.');
    }

    public function destroy(Menu $menu): RedirectResponse
    {
        $menu->delete();

        return back()->with('status', 'Menu deleted. Components using its location will use their safe fallback.');
    }

    /** @return array<string, mixed> */
    private function validated(Request $request): array
    {
        $data = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'location' => ['required', 'string', 'max:100', 'regex:/^[a-z0-9_-]+$/'],
            'items_json' => ['nullable', 'string'],
            'enabled' => ['nullable', 'boolean'],
        ]);

        try {
            $items = json_decode($data['items_json'] ?: '[]', true, 512, JSON_THROW_ON_ERROR);
        } catch (JsonException) {
            throw ValidationException::withMessages(['items_json' => 'The menu items could not be saved. Please reload the editor and try again.']);
        }

        if (! is_array($items)) {
            throw ValidationException::withMessages(['items_json' => 'Menu items must be a list.']);
        }

        return [
            'name' => $data['name'],
            'location' => $data['location'],
            'items' => array_values($items),
            'enabled' => $request->boolean('enabled'),
        ];
    }

    /** @return array<string, string> */
    private function locations(): array
    {
        return [
            'primary' => 'Primary navigation',
            'footer' => 'Footer — Explore',
            'footer_account' => 'Footer — Account',
            'footer_legal' => 'Footer — Legal',
            'mobile' => 'Mobile navigation override',
        ];
    }
}