<?php

declare(strict_types=1);

namespace App\Http\Controllers\Bo;

use App\Http\Controllers\Controller;
use App\Http\Requests\Bo\Discounts\StoreDiscountRequest;
use App\Http\Requests\Bo\Discounts\UpdateDiscountRequest;
use App\Models\Discount;
use App\Models\Product;
use App\Services\DataTableService;
use App\Traits\Controllers\ChangesModelOrder;
use App\Traits\Controllers\TogglesModelStatus;
use Domain\Enums\DiscountType;
use Illuminate\Contracts\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

class DiscountsController extends Controller
{
    use ChangesModelOrder;
    use TogglesModelStatus;

    public function index(DataTableService $dataTable): View
    {
        $this->authorize('viewAny', Discount::class);

        $query = Discount::query();

        $dataTable->sortQuery(Discount::class, $query);

        $discounts = $dataTable->paginateQuery($query);

        return view('bo.discounts.index', compact('discounts'));
    }

    public function create(): View
    {
        $this->authorize('create', Discount::class);

        $discountTypes = DiscountType::cases();
        $existingProds = Product::query()
            ->select(['id', 'name'])
            ->orderBy('name')
            ->get();
        $selectedProds = [];

        return view('bo.discounts.create', compact(
            'discountTypes',
            'existingProds',
            'selectedProds'
        ));
    }

    public function store(StoreDiscountRequest $request): RedirectResponse
    {
        $this->authorize('create', Discount::class);

        return DB::transaction(function () use ($request) {
            $discount = new Discount();
            $discount->fill($request->only(
                $discount->getFillable()
            ));
            $discount->value = $request->getDiscountValue();

            if ($discount->saveOrFail()) {
                $this->syncAssociatedProducts(
                    $request->getAssociatedProductsIds(),
                    $discount
                );

                return to_route('bo.discounts.edit', $discount)
                    ->with('success', trans('crud.messages.has_been_created', [
                        'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                    ]));
            }

            return to_route('bo.discounts.create')
                ->with('error', trans('crud.messages.cannot_be_created', [
                    'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                ]));
        });
    }

    public function edit(Discount $discount): View
    {
        $this->authorize('update', $discount);

        $discountTypes = DiscountType::cases();

        $selectedProds = $discount->products()
            ->select(['products.id', 'products.name'])
            ->get();
        $existingProds = Product::query()
            ->select(['id', 'name'])
            ->whereNotIn('id', $selectedProds->pluck('id'))
            ->orderBy('name')
            ->get();

        return view('bo.discounts.edit', compact(
            'discount',
            'discountTypes',
            'existingProds',
            'selectedProds',
        ));
    }

    public function update(UpdateDiscountRequest $request, Discount $discount): RedirectResponse
    {
        $this->authorize('update', $discount);

        return DB::transaction(function () use ($request, $discount) {
            $discount->fill($request->only(
                $discount->getFillable()
            ));

            $discount->value = $request->getDiscountValue();

            $this->syncAssociatedProducts(
                $request->getAssociatedProductsIds(),
                $discount
            );

            if ($discount->saveOrFail()) {
                return to_route('bo.discounts.edit', $discount)
                    ->with('success', trans('crud.messages.has_been_updated', [
                        'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                    ]));
            }

            return to_route('bo.discounts.edit', $discount)
                ->with('error', trans('crud.messages.cannot_be_updated', [
                    'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                ]));
        });
    }

    public function destroy(Discount $discount): RedirectResponse
    {
        $this->authorize('delete', $discount);

        return DB::transaction(function () use ($discount) {
            if ($discount->deleteOrFail()) {
                return to_route('bo.discounts.index')
                    ->with('warning', trans('crud.messages.has_been_deleted', [
                        'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                    ]));
            }

            return to_route('bo.discounts.edit', $discount)
                ->with('error', trans('crud.messages.cannot_be_deleted', [
                    'model' => Str::ucfirst(trans_choice('models.classes.discounts', 1)),
                ]));
        });
    }

    /** @param array<string> $productIdList */
    private function syncAssociatedProducts(array $productIdList, Discount $discount): void
    {
        $discount->products()
            ->whereNotIn('id', $productIdList)
            ->update(['discount_id' => null]);

        if (! empty($productIdList)) {
            Product::query()
                ->whereIn('id', $productIdList)
                ->update(['discount_id' => $discount->id]);
        }
    }
}