<?php
/**
 * For the full copyright and license information, please view the
 * docs/licenses/LICENSE.txt file that was distributed with this source code.
 */

declare(strict_types=1);

namespace PrestaShop\PrestaShop\Adapter\Carrier\Repository;

use Carrier;
use Doctrine\DBAL\ArrayParameterType;
use Doctrine\DBAL\Connection;
use PrestaShop\Decimal\DecimalNumber;
use PrestaShop\PrestaShop\Adapter\Shop\Repository\ShopRepository;
use PrestaShop\PrestaShop\Core\Domain\AttributeGroup\Attribute\Exception\AttributeNotFoundException;
use PrestaShop\PrestaShop\Core\Domain\Carrier\Exception\CannotAddCarrierException;
use PrestaShop\PrestaShop\Core\Domain\Carrier\Exception\CannotUpdateCarrierException;
use PrestaShop\PrestaShop\Core\Domain\Carrier\Exception\CarrierNotFoundException;
use PrestaShop\PrestaShop\Core\Domain\Carrier\ValueObject\CarrierConstraints;
use PrestaShop\PrestaShop\Core\Domain\Carrier\ValueObject\CarrierId;
use PrestaShop\PrestaShop\Core\Domain\Shop\ValueObject\ShopConstraint;
use PrestaShop\PrestaShop\Core\Domain\Shop\ValueObject\ShopGroupId;
use PrestaShop\PrestaShop\Core\Domain\Shop\ValueObject\ShopId;
use PrestaShop\PrestaShop\Core\Domain\TaxRulesGroup\ValueObject\TaxRulesGroupId;
use PrestaShop\PrestaShop\Core\Domain\Zone\ValueObject\ZoneId;
use PrestaShop\PrestaShop\Core\Exception\CoreException;
use PrestaShop\PrestaShop\Core\Repository\AbstractMultiShopObjectModelRepository;
use RuntimeException;

/**
 * Provides access to carrier data source
 */
class CarrierRepository extends AbstractMultiShopObjectModelRepository
{
    public function __construct(
        private readonly ShopRepository $shopRepository,
        private readonly Connection $connection,
        private readonly string $prefix,
    ) {
    }

    /**
     * @param CarrierId $carrierId
     *
     * @return Carrier
     *
     * @throws AttributeNotFoundException
     * @throws CoreException
     */
    public function get(CarrierId $carrierId): Carrier
    {
        /** @var Carrier $carrier */
        $carrier = $this->getObjectModel(
            $carrierId->getValue(),
            Carrier::class,
            CarrierNotFoundException::class
        );

        return $carrier;
    }

    public function assertCarrierExists(CarrierId $carrierId): void
    {
        $this->assertObjectModelExists($carrierId->getValue(), 'carrier', CarrierNotFoundException::class);
    }

    public function add(Carrier $carrier, array $shopIds): CarrierId
    {
        $carrierId = $this->addObjectModelToShops(
            $carrier,
            $shopIds,
            CannotAddCarrierException::class
        );

        return new CarrierId((int) $carrierId);
    }

    public function update(Carrier $carrier, int $errorCode): void
    {
        $this->updateObjectModel(
            $carrier,
            CannotUpdateCarrierException::class,
            $errorCode
        );
    }

    /**
     * Returns a single shop ID when the constraint is a single shop, and the list of shops associated to the carrier
     * when the constraint is for all shops
     *
     * @param CarrierId $carrierId
     * @param ShopConstraint $shopConstraint
     *
     * @return ShopId[]
     */
    public function getShopIdsByConstraint(CarrierId $carrierId, ShopConstraint $shopConstraint): array
    {
        if ($shopConstraint->getShopGroupId()) {
            return $this->getAssociatedShopIdsFromGroup($carrierId, $shopConstraint->getShopGroupId());
        }

        if ($shopConstraint->forAllShops()) {
            return $this->getAssociatedShopIds($carrierId);
        }

        return [$shopConstraint->getShopId()];
    }

    /**
     * @param CarrierId $carrierId
     *
     * @return ShopId[]
     */
    public function getAssociatedShopIds(CarrierId $carrierId): array
    {
        $shops = parent::getObjectModelAssociatedShopIds($carrierId->getValue(), 'carrier');

        return array_map(static function (int $shopId) {
            return new ShopId((int) $shopId);
        }, $shops);
    }

    /**
     * @param CarrierId $carrierId
     * @param ShopGroupId $shopGroupId
     *
     * @return ShopId[]
     */
    public function getAssociatedShopIdsFromGroup(CarrierId $carrierId, ShopGroupId $shopGroupId): array
    {
        $qb = $this->connection->createQueryBuilder();
        $qb
            ->select('ps.id_shop')
            ->from($this->prefix . 'carrier_shop', 'ps')
            ->innerJoin(
                'ps',
                $this->prefix . 'shop',
                's',
                's.id_shop = ps.id_shop'
            )
            ->where('ps.id_carrier = :carrierId')
            ->andWhere('s.id_shop_group = :shopGroupId')
            ->setParameter('shopGroupId', $shopGroupId->getValue())
            ->setParameter('carrierId', $carrierId->getValue())
        ;

        return array_map(static function (array $shop) {
            return new ShopId((int) $shop['id_shop']);
        }, $qb->executeQuery()->fetchAllAssociative());
    }

    /**
     * Create a new version of the carrier, or return the carrier as is if it don't have order linked.
     *
     * @param CarrierId $carrierId
     *
     * @return Carrier
     */
    public function getEditableOrNewVersion(CarrierId $carrierId): Carrier
    {
        // If the carrier don't have orders linked, we can return it as is
        if ($this->getOrdersCount($carrierId) === 0) {
            return $this->get($carrierId);
        }

        // Otherwise, we need to create a new version of the carrier
        // Get the carrier to duplicate
        $carrier = $this->get($carrierId);
        /** @var Carrier $newCarrier */
        $newCarrier = $carrier->duplicateObject();
        $carrier->deleted = true;
        $this->partiallyUpdateObjectModel($carrier, ['deleted'], CannotUpdateCarrierException::class);

        // Copy all others information like ranges, shops associated, ...
        $newCarrier->copyCarrierData($carrierId->getValue());
        $this->update($newCarrier, CannotUpdateCarrierException::FAILED_UPDATE_CARRIER);
        $newCarrier->setGroups($carrier->getAssociatedGroupIds());

        // Return the new duplicated carrier
        return $newCarrier;
    }

    /**
     * @param CarrierId $carrierId
     * @param int[] $shopIds
     *
     * @return void
     */
    public function updateAssociatedShops(CarrierId $carrierId, array $shopIds): void
    {
        $this->updateObjectModelShopAssociations(
            $carrierId->getValue(),
            Carrier::class,
            $shopIds
        );
    }

    /**
     * Return all zones associated for the given carrier
     *
     * @param CarrierId $carrierId
     *
     * @return array
     */
    public function getAssociatedZones(CarrierId $carrierId): array
    {
        $qb = $this->connection->createQueryBuilder();
        $result = $qb->select('id_zone')
            ->from($this->prefix . 'carrier_zone')
            ->where('id_carrier = :carrierId')
            ->setParameter('carrierId', $carrierId->getValue())
            ->executeQuery()
            ->fetchFirstColumn();

        return $result;
    }

    /**
     * We add the association between the carrier and the zone.
     *
     * @param CarrierId $carrierId
     * @param int[] $zoneIds
     *
     * @return void
     */
    public function updateAssociatedZones(CarrierId $carrierId, array $zoneIds): void
    {
        $this->connection->beginTransaction();

        $this->connection->delete($this->prefix . 'carrier_zone', [
            'id_carrier' => $carrierId->getValue(),
        ]);

        foreach ($zoneIds as $zoneId) {
            $this->connection->insert(
                $this->prefix . 'carrier_zone',
                [
                    'id_carrier' => $carrierId->getValue(),
                    'id_zone' => $zoneId,
                ]
            );
        }

        $this->connection->commit();
    }

    public function getTaxRulesGroup(CarrierId $carrierId, ShopConstraint $shopConstraint): int
    {
        $qb = $this->connection->createQueryBuilder();
        $qb
            ->select('ct.id_tax_rules_group')
            ->from($this->prefix . 'carrier_tax_rules_group_shop', 'ct')
            ->where('ct.id_carrier = :carrierId')
            ->setParameter('carrierId', $carrierId->getValue())
            // In case of multiple shops (for all shops and group shop) we fetch the first one
            // This is not strictly incorrect but until we decide how we handle multi shop we have no better solution
            ->orderBy('ct.id_shop')
            ->setMaxResults(1)
        ;

        if ($shopConstraint->getShopId()) {
            $qb
                ->andWhere('ct.id_shop = :shopId')
                ->setparameter('shopId', $shopConstraint->getShopId()->getValue())
            ;
        }
        $id = (int) $qb->fetchOne();

        return $id;
    }

    public function setTaxRulesGroup(CarrierId $carrierId, TaxRulesGroupId $taxRulesGroupId, ShopConstraint $shopConstraint): void
    {
        if ($shopConstraint->getShopId()) {
            $shopIdsToClean = $shopIdsToUpdate = [$shopConstraint->getShopId()->getValue()];
        } elseif ($shopConstraint->forAllShops()) {
            $shopIdsToUpdate = $this->getObjectModelAssociatedShopIds($carrierId->getValue(), Carrier::class);
            $shopIdsToClean = $this->shopRepository->getAssociatedShopIds($shopConstraint);
        } else {
            throw new RuntimeException('Cannot handle this shop constraint');
        }
        $this->deleteTaxRulesGroup($carrierId, $shopIdsToClean);

        // Doctrine doesn't handle bulk insert so e must insert each ro one by one
        foreach ($shopIdsToUpdate as $shopId) {
            $this->connection->insert(
                $this->prefix . 'carrier_tax_rules_group_shop',
                [
                    'id_carrier' => $carrierId->getValue(),
                    'id_tax_rules_group' => $taxRulesGroupId->getValue(),
                    'id_shop' => $shopId,
                ]
            );
        }
    }

    /**
     * @param CarrierId $carrierId
     * @param int[] $shopIds
     *
     * @return void
     */
    private function deleteTaxRulesGroup(CarrierId $carrierId, array $shopIds): void
    {
        $qb = $this->connection->createQueryBuilder();
        $qb
            ->delete($this->prefix . 'carrier_tax_rules_group_shop')
            ->where('id_carrier = :carrierId')
            ->andwhere('id_shop IN (:shopIds)')
            ->setParameter('carrierId', $carrierId->getValue())
            ->setParameter('shopIds', $shopIds, ArrayParameterType::INTEGER)
        ;

        $qb->executeStatement();
    }

    public function getOrdersCount(CarrierId $carrierId): int
    {
        $qb = $this->connection->createQueryBuilder();

        return (int) $qb->select('COUNT(*)')
            ->from($this->prefix . 'order_carrier', 'oc')
            ->where('oc.id_carrier = :carrierId')
            ->setParameter('carrierId', $carrierId->getValue())
            ->executeQuery()
            ->fetchOne();
    }

    /**
     * Returns the position of the last carrier in the list.
     * The caller is responsible for incrementing this value by 1 to get the next position.
     *
     * @return int Position of the last carrier
     */
    public function getLastPosition(): ?int
    {
        $qb = $this->connection->createQueryBuilder();

        $lastPosition = $qb->select('c.position')
            ->from($this->prefix . 'carrier', 'c')
            ->orderBy('c.position', 'DESC')
            ->setMaxResults(1)
            ->executeQuery()
            ->fetchOne()
        ;

        return $lastPosition !== false ? (int) $lastPosition : null;
    }

    public function getCarrierConstraints(CarrierId $carrierId): CarrierConstraints
    {
        $qb = $this->connection->createQueryBuilder();

        $qb
            ->select('c.max_width', 'c.max_height', 'c.max_depth', 'c.max_weight')
            ->from($this->prefix . 'carrier', 'c')
            ->where('c.id_carrier = :carrierId')
            ->setParameter('carrierId', $carrierId->getValue());

        $result = $qb->executeQuery()->fetchAssociative();

        if (!$result) {
            throw new RuntimeException("Carrier with ID {$carrierId->getValue()} not found.");
        }

        return new CarrierConstraints(
            new DecimalNumber($result['max_weight']),
            (int) $result['max_width'],
            (int) $result['max_height'],
            (int) $result['max_depth']
        );
    }

    /**
     * Checks if a given carrier is available for a specific zone.
     *
     * @return bool True if carrier is available for the zone, false otherwise
     */
    public function checkCarrierZone(CarrierId $carrierId, ZoneId $zoneId): bool
    {
        $qb = $this->connection->createQueryBuilder();
        $qb
            ->select('c.id_carrier')
            ->from($this->prefix . 'carrier', 'c')
            ->innerJoin('c', $this->prefix . 'carrier_zone', 'cz', 'cz.id_carrier = c.id_carrier')
            ->innerJoin('cz', $this->prefix . 'zone', 'z', 'z.id_zone = cz.id_zone')
            ->where('c.id_carrier = :carrierId')
            ->andWhere('c.deleted = 0')
            ->andWhere('c.active = 1')
            ->andWhere('cz.id_zone = :zoneId')
            ->andWhere('z.active = 1')
            ->setParameter('carrierId', $carrierId->getValue())
            ->setParameter('zoneId', $zoneId->getValue());

        return (bool) $qb->executeQuery()->fetchOne();
    }

    /**
     * Returns a mapping of product IDs to their available carriers.
     *
     * @param int[] $productIds list of product IDs
     *
     * @return array<int, array<int, array{id_carrier: int, name: string}>>
     *
     * An associative array where the key is the product ID and the value is an array of carriers.
     * Each carrier is represented as an associative array with keys:
     *  - id_carrier: The carrier ID.
     *  - name: The carrier name.
     */
    public function findCarriersByProductIds(array $productIds, ShopId $shopId): array
    {
        // Step 1: Get all active carriers once
        $allCarriers = $this->getAllActiveCarriers();

        // Step 2: Initialize mapping with all carriers for each product
        $mapping = [];
        foreach ($productIds as $productId) {
            $mapping[$productId] = $allCarriers;
        }

        // Step 3: Get restricted carriers for certain products
        $productCarriers = $this->getProductCarriers($productIds, $shopId);
        $restricted = $this->mapProductCarriers($productCarriers);

        // Step 4: Override default mapping with restricted carriers where applicable
        foreach ($restricted as $productId => $carriers) {
            $mapping[$productId] = $carriers;
        }

        return $mapping;
    }

    private function getProductCarriers(array $productIds, ShopId $shopId): array
    {
        $qb = $this->connection->createQueryBuilder();

        return $qb->select('pc.id_product as product_id', 'c.id_carrier', 'c.name')
            ->from($this->prefix . 'product_carrier', 'pc')
            ->innerJoin(
                'pc',
                $this->prefix . 'carrier',
                'c',
                'c.id_reference = pc.id_carrier_reference AND c.deleted = 0 AND c.active = 1'
            )
            ->where($qb->expr()->in('pc.id_product', ':product_ids'))
            ->andWhere('pc.id_shop = :shop_id')
            ->setParameter('product_ids', $productIds, ArrayParameterType::INTEGER)
            ->setParameter('shop_id', $shopId->getValue())
            ->executeQuery()
            ->fetchAllAssociative();
    }

    /**
     * @return array<int, array{id_carrier: int|string, name: string}>
     */
    private function getAllActiveCarriers(): array
    {
        return $this->connection->createQueryBuilder()
            ->select('id_carrier', 'name')
            ->from($this->prefix . 'carrier')
            ->where('deleted = 0')
            ->andWhere('active = 1')
            ->orderBy('name', 'ASC')
            ->executeQuery()
            ->fetchAllAssociative();
    }

    private function mapProductCarriers(array $rows): array
    {
        $mapping = [];

        foreach ($rows as $row) {
            $mapping[$row['product_id']][] = [
                'id_carrier' => $row['id_carrier'],
                'name' => $row['name'],
            ];
        }

        return $mapping;
    }
}