<?php

namespace App\Services\Master;

use App\Models\RawMaterial;
use App\Models\RawMaterialPrice;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;

class RawMaterialService
{
    /**
     * @param  array{search: string, sort: string, direction: 'asc'|'desc'}  $tableQuery
     */
    public function paginateForIndex(array $tableQuery, string $isActive): LengthAwarePaginator
    {
        $query = RawMaterial::query()
            ->with([
                'prices' => fn ($query) => $query
                    ->orderBy('created_at')
                    ->with('rawMaterial:id,unit'),
            ])
            ->when($tableQuery['search'] !== '', function (Builder $query) use ($tableQuery): void {
                $search = $tableQuery['search'];
                $query->where(function (Builder $query) use ($search): void {
                    $query->where('name', 'like', "%{$search}%")
                        ->orWhereHas('prices', fn (Builder $query) => $query->where('variant', 'like', "%{$search}%"));
                });
            })
            ->when(
                $isActive !== '',
                fn (Builder $query) => $query->where('is_active', $isActive === '1')
            );

        $this->applySorting($query, $tableQuery['sort'], $tableQuery['direction']);

        return $query
            ->paginate(10)
            ->withQueryString();
    }

    /**
     * @param  array<string, mixed>  $validated
     */
    public function create(array $validated): void
    {
        DB::transaction(function () use ($validated): void {
            $rawMaterial = RawMaterial::create([
                'name' => $validated['name'],
                'unit' => $validated['unit'],
            ]);

            foreach ($validated['prices'] as $priceData) {
                $this->createPrice($rawMaterial, $priceData);
            }
        });
    }

    /**
     * @param  array<string, mixed>  $validated
     */
    public function update(RawMaterial $rawMaterial, array $validated): void
    {
        DB::transaction(function () use ($validated, $rawMaterial): void {
            $rawMaterial->name = $validated['name'];
            $rawMaterial->unit = $validated['unit'];
            $rawMaterial->save();

            $submittedPriceIds = collect($validated['prices'])
                ->pluck('id')
                ->filter()
                ->map(fn ($id) => (int) $id)
                ->all();

            $rawMaterial->prices()
                ->whereNotIn('id', $submittedPriceIds)
                ->get()
                ->each(fn (RawMaterialPrice $price) => $price->delete());

            foreach ($validated['prices'] as $priceData) {
                if (! empty($priceData['id'])) {
                    $price = $rawMaterial->prices()->findOrFail($priceData['id']);
                    $price->variant = $priceData['variant'];
                    $price->price = $priceData['price'];
                    $price->stock = $priceData['stock'];
                    $price->save();

                    continue;
                }

                $this->createPrice($rawMaterial, $priceData);
            }
        });
    }

    public function toggleStatus(RawMaterial $rawMaterial, bool $isActive): void
    {
        $rawMaterial->is_active = $isActive;
        $rawMaterial->save();
    }

    public function delete(RawMaterial $rawMaterial): void
    {
        DB::transaction(function () use ($rawMaterial): void {
            $rawMaterial->prices()->delete();
            $rawMaterial->delete();
        });
    }

    private function applySorting(Builder $query, string $sort, string $direction): void
    {
        if (in_array($sort, ['name', 'unit', 'is_active'], true)) {
            $query->orderBy($sort, $direction);

            return;
        }

        $query->latest();
    }

    /**
     * @param  array<string, mixed>  $priceData
     */
    private function createPrice(RawMaterial $rawMaterial, array $priceData): RawMaterialPrice
    {
        return $rawMaterial->prices()->create([
            'variant' => $priceData['variant'],
            'price' => $priceData['price'],
            'stock' => $priceData['stock'],
        ]);
    }
}