<?php

namespace Modules\Tms\Services;

use App\Transaction;
use Modules\Tms\Models\CustomsClearance;
use Modules\Tms\Models\Shipment;
use Modules\Tms\Utils\TmsUtil;

class TmsCustomsShipmentSyncService
{
    public function __construct(
        protected TmsUtil $tmsUtil
    ) {}

    public function linkMutually(CustomsClearance $clearance, Shipment $shipment): void
    {
        $updates = [];

        if ((int) $clearance->shipment_id !== (int) $shipment->id) {
            $updates['shipment_id'] = $shipment->id;
        }

        if (! $clearance->transaction_id && $shipment->transaction_id) {
            $updates['transaction_id'] = $shipment->transaction_id;
        }

        if (! $clearance->contact_id && $shipment->contact_id) {
            $updates['contact_id'] = $shipment->contact_id;
        }

        if ($updates) {
            $clearance->update($updates);
        }
    }

    public function linkByTransaction(CustomsClearance $clearance): CustomsClearance
    {
        $settings = $this->tmsUtil->getTmsSettings($clearance->business_id);

        if (empty($settings['auto_link_customs_shipment'])) {
            return $clearance;
        }

        if ($clearance->shipment_id) {
            return $clearance;
        }

        if ($clearance->transaction_id) {
            $shipment = Shipment::where('business_id', $clearance->business_id)
                ->where('transaction_id', $clearance->transaction_id)
                ->first();

            if ($shipment) {
                $this->linkMutually($clearance, $shipment);
                $this->syncShipmentFromCustoms($clearance->fresh());

                return $clearance->fresh();
            }
        }

        if ($clearance->clearance_type === 'import' && ! empty($settings['auto_create_shipment_on_customs_import'])) {
            $shipment = $this->createImportShipmentForCustoms($clearance);
            if ($shipment) {
                $this->linkMutually($clearance->fresh(), $shipment);
                $this->syncShipmentFromCustoms($clearance->fresh());
            }
        }

        return $clearance->fresh();
    }

    public function linkByTransactionForShipment(Shipment $shipment): Shipment
    {
        $settings = $this->tmsUtil->getTmsSettings($shipment->business_id);

        if (empty($settings['auto_link_customs_shipment']) || ! $shipment->transaction_id) {
            return $shipment;
        }

        $clearance = CustomsClearance::where('business_id', $shipment->business_id)
            ->where('transaction_id', $shipment->transaction_id)
            ->first();

        if ($clearance) {
            $this->linkMutually($clearance, $shipment);
            $this->syncShipmentFromCustoms($clearance->fresh());
        }

        return $shipment->fresh(['customsClearance']);
    }

    public function syncShipmentFromCustoms(CustomsClearance $clearance): void
    {
        $settings = $this->tmsUtil->getTmsSettings($clearance->business_id);

        if (empty($settings['sync_customs_shipment_status']) || ! $clearance->shipment_id) {
            return;
        }

        $shipment = Shipment::find($clearance->shipment_id);
        if (! $shipment) {
            return;
        }

        $newStatus = $this->tmsUtil->mapCustomsStatusToShipment($clearance->status, $shipment->status);
        if (! $newStatus || $shipment->status === $newStatus) {
            return;
        }

        $this->shipmentService()->updateStatus(
            $shipment,
            $newStatus,
            __('tms::lang.synced_from_customs', ['ref' => $clearance->ref_no]),
            null,
            skipCustomsCheck: true
        );
    }

    public function createImportShipmentForCustoms(CustomsClearance $clearance): ?Shipment
    {
        if ($clearance->clearance_type !== 'import') {
            return null;
        }

        $business_id = (int) $clearance->business_id;
        $transaction = $clearance->transaction_id
            ? Transaction::find($clearance->transaction_id)
            : null;

        if ($transaction) {
            $existing = Shipment::where('business_id', $business_id)
                ->where('transaction_id', $transaction->id)
                ->first();

            if ($existing) {
                return $existing;
            }
        }

        $shipment = Shipment::create([
            'business_id' => $business_id,
            'ref_no' => $this->tmsUtil->generateRefNo($business_id),
            'shipment_type' => 'import',
            'transaction_id' => $clearance->transaction_id,
            'contact_id' => $clearance->contact_id ?? $transaction?->contact_id,
            'origin_location_id' => $transaction?->location_id,
            'destination_address' => $transaction?->shipping_address,
            'status' => 'at_customs',
            'scheduled_at' => $transaction?->delivery_date ?? now(),
            'freight_cost' => $transaction?->shipping_charges ?? 0,
            'cargo_description' => $transaction?->shipping_details,
            'created_by' => auth()->id(),
        ]);

        $this->shipmentService()->logStatus(
            $shipment,
            'at_customs',
            __('tms::lang.shipment_created_from_customs', ['ref' => $clearance->ref_no])
        );

        return $shipment;
    }

    protected function shipmentService(): TmsShipmentService
    {
        return app(TmsShipmentService::class);
    }

    public function customsBlocksTransit(Shipment $shipment): bool
    {
        $settings = $this->tmsUtil->getTmsSettings($shipment->business_id);

        if (empty($settings['require_customs_cleared_before_transit'])) {
            return false;
        }

        $clearance = $shipment->customsClearance
            ?? CustomsClearance::where('shipment_id', $shipment->id)->first();

        if (! $clearance) {
            return false;
        }

        return ! in_array($clearance->status, ['cleared', 'released'], true);
    }

    public function transitBlockMessage(Shipment $shipment): string
    {
        $clearance = $shipment->customsClearance
            ?? CustomsClearance::where('shipment_id', $shipment->id)->first();

        $ref = $clearance?->ref_no ?? '';

        return __('tms::lang.customs_blocks_transit', ['ref' => $ref]);
    }
}