<?php

namespace App\Http\Controllers\Pos;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Pos\Concerns\ScopesToAccount;
use App\Models\PosDevice;
use App\Models\PosLocation;
use App\Models\PosMember;
use App\Models\PaymentGatewaySetting;
use App\Models\PosTable;
use App\Models\User;
use App\Services\Import\CrmProductImportService;
use App\Services\Import\MerchantCatalogImportService;
use App\Services\Payments\MerchantGatewayService;
use App\Services\Pos\PosLocationService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Validation\Rule;
use Illuminate\View\View;
use RuntimeException;

class SettingsController extends Controller
{
    use ScopesToAccount;

    public function __construct(
        private PosLocationService $locations,
        private \App\Services\Pos\SubscriptionService $subscriptions,
        private MerchantGatewayService $gateway,
    ) {}

    public function index(Request $request): View
    {
        $owner = $this->ownerRef($request);
        $location = $this->location($request);
        $account = ladill_account() ?? $request->user();
        $scope = $this->locationScope($request);

        $branches = $scope === null
            ? PosLocation::owned($owner)->orderBy('name')->get()
            : PosLocation::owned($owner)->whereKey($scope)->orderBy('name')->get();

        $devicesQuery = PosDevice::owned($owner)->with('location')->orderBy('name');
        $this->scopeToLocation($request, $devicesQuery);

        return view('pos.settings', [
            'location' => $location,
            'branches' => $branches,
            'devices' => $devicesQuery->limit(10)->get(),
            'deviceTypes' => config('pos.device_types', []),
            'members' => PosMember::owned($owner)->with('location')->orderBy('created_at')->get(),
            'roles' => config('pos.roles', []),
            'hasMultiLocation' => $this->subscriptions->canUseMultiLocation($account),
            'hasTeamFeatures' => $this->subscriptions->canManageTeam($account),
            'canAddBranch' => $this->subscriptions->canAddLocation($account, $owner),
            'merchantImportEnabled' => (bool) config('pos.merchant_import_enabled', true),
            'tables' => $this->scopeToLocation($request, PosTable::owned($owner))
                ->orderBy('area')->orderBy('position')->orderBy('label')->get(),
            'gateway' => $this->gateway->settingFor($account),
            'canUsePaymentGateway' => $this->subscriptions->canUsePaymentGateway($account),
        ]);
    }

    public function update(Request $request): RedirectResponse
    {
        $data = $request->validate([
            'name' => ['required', 'string', 'max:120'],
            'currency' => ['required', 'string', 'size:3'],
            'service_style' => ['required', 'in:retail,restaurant'],
            'receipt_footer' => ['nullable', 'string', 'max:1000'],
            'receipt_header' => ['nullable', 'string', 'max:500'],
            'receipt_logo' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:2048'],
            'remove_receipt_logo' => ['sometimes', 'boolean'],
            'printer_paper_mm' => ['required', 'in:58,80'],
            'printer_auto_print' => ['sometimes', 'boolean'],
            'customer_promo_headline' => ['nullable', 'string', 'max:160'],
            'customer_promo_body' => ['nullable', 'string', 'max:500'],
            'customer_promo_image' => ['nullable', 'image', 'mimes:jpeg,jpg,png,gif,webp', 'max:2048'],
            'remove_customer_promo_image' => ['sometimes', 'boolean'],
            'gateway_provider' => ['nullable', Rule::in([
                PaymentGatewaySetting::PROVIDER_PAYSTACK,
                PaymentGatewaySetting::PROVIDER_FLUTTERWAVE,
                PaymentGatewaySetting::PROVIDER_HUBTEL,
                '',
            ])],
            'gateway_public_key' => ['nullable', 'string', 'max:2000'],
            'gateway_secret_key' => ['nullable', 'string', 'max:2000'],
            'gateway_webhook_secret' => ['nullable', 'string', 'max:2000'],
            'gateway_is_active' => ['nullable', 'boolean'],
        ]);

        $user = ladill_account() ?? $request->user();
        if ($data['service_style'] === 'restaurant' && ! $this->subscriptions->canUseRestaurantMode($user)) {
            return redirect()->route('pos.pro.index')
                ->with('upsell', 'Restaurant mode is part of Ladill POS Pro.');
        }

        $location = $this->location($request);

        if ($request->boolean('remove_receipt_logo') && $location->receipt_logo_path) {
            Storage::disk('public')->delete($location->receipt_logo_path);
            $location->receipt_logo_path = null;
        }

        if ($request->hasFile('receipt_logo')) {
            if ($location->receipt_logo_path) {
                Storage::disk('public')->delete($location->receipt_logo_path);
            }
            $location->receipt_logo_path = $request->file('receipt_logo')->store(
                'pos/receipt-logos/'.$this->ownerRef($request),
                'public'
            );
        }

        if ($request->boolean('remove_customer_promo_image') && $location->customer_promo_image_path) {
            Storage::disk('public')->delete($location->customer_promo_image_path);
            $location->customer_promo_image_path = null;
        }

        if ($request->hasFile('customer_promo_image')) {
            if ($location->customer_promo_image_path) {
                Storage::disk('public')->delete($location->customer_promo_image_path);
            }
            $location->customer_promo_image_path = $request->file('customer_promo_image')->store(
                'pos/customer-promo/'.$this->ownerRef($request),
                'public'
            );
        }

        $location->update([
            'name' => $data['name'],
            'currency' => strtoupper($data['currency']),
            'service_style' => $data['service_style'],
            'receipt_footer' => $data['receipt_footer'] ?? null,
            'receipt_header' => $data['receipt_header'] ?? null,
            'printer_paper_mm' => (int) $data['printer_paper_mm'],
            'printer_auto_print' => $request->boolean('printer_auto_print'),
            'receipt_logo_path' => $location->receipt_logo_path,
            'customer_promo_headline' => $data['customer_promo_headline'] ?? null,
            'customer_promo_body' => $data['customer_promo_body'] ?? null,
            'customer_promo_image_path' => $location->customer_promo_image_path,
        ]);

        $this->persistGateway($request, $user);

        return back()->with('success', 'Settings saved.');
    }

    /**
     * Upsert merchant gateway credentials for the acting account.
     * Blank secret fields keep the previously stored encrypted values.
     * Free plan cannot connect or change gateway credentials.
     */
    protected function persistGateway(Request $request, User $user): void
    {
        $ownerRef = (string) $user->public_id;
        $existing = PaymentGatewaySetting::query()->where('owner_ref', $ownerRef)->first();

        $provider = trim((string) $request->input('gateway_provider', ''));
        $publicKey = trim((string) $request->input('gateway_public_key', ''));
        $secretKey = trim((string) $request->input('gateway_secret_key', ''));
        $webhookSecret = trim((string) $request->input('gateway_webhook_secret', ''));

        // No provider chosen and no prior config — nothing to persist.
        if ($provider === '' && $existing === null) {
            return;
        }

        if (! $this->subscriptions->canUsePaymentGateway($user)) {
            // Ignore gateway fields on free plan (other settings may still save).
            return;
        }

        $attributes = [
            'provider' => $provider !== '' ? $provider : $existing->provider,
            'is_active' => $request->boolean('gateway_is_active'),
        ];

        // Leave blank on the form means "keep the saved credential".
        if ($publicKey !== '') {
            $attributes['public_key'] = $publicKey;
        }
        if ($secretKey !== '') {
            $attributes['secret_key'] = $secretKey;
        }
        if ($webhookSecret !== '') {
            $attributes['webhook_secret'] = $webhookSecret;
        }

        PaymentGatewaySetting::query()->updateOrCreate(
            ['owner_ref' => $ownerRef],
            $attributes,
        );
    }

    public function storeTable(Request $request): RedirectResponse
    {
        $data = $request->validate([
            'area' => ['nullable', 'string', 'max:60'],
            'label' => ['required', 'string', 'max:60'],
            'seats' => ['nullable', 'integer', 'min:1', 'max:99'],
        ]);

        $owner = $this->ownerRef($request);
        $location = $this->location($request);

        PosTable::create([
            'owner_ref' => $owner,
            'location_id' => $location->id,
            'area' => $data['area'] ?? null,
            'label' => $data['label'],
            'seats' => $data['seats'] ?? 2,
            'status' => PosTable::STATUS_FREE,
            'position' => (int) PosTable::owned($owner)->max('position') + 1,
        ]);

        return back()->with('success', 'Table added.');
    }

    public function destroyTable(Request $request, PosTable $table): RedirectResponse
    {
        $this->authorizeOwner($request, $table);

        if (! $table->isFree()) {
            return back()->with('error', 'Settle the open ticket before removing this table.');
        }

        $table->delete();

        return back()->with('success', 'Table removed.');
    }

    public function importCrm(Request $request, CrmProductImportService $import): RedirectResponse
    {
        try {
            $result = $import->import($this->ownerRef($request));

            return back()->with('success', "Imported {$result['imported']} product(s), updated {$result['updated']}.");
        } catch (RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        }
    }

    public function importMerchant(Request $request, MerchantCatalogImportService $import): RedirectResponse
    {
        try {
            $result = $import->import($this->ownerRef($request));

            return back()->with('success', "Imported {$result['imported']} item(s) from {$result['storefronts']} storefront(s), updated {$result['updated']}.");
        } catch (RuntimeException $e) {
            return back()->with('error', $e->getMessage());
        }
    }
}