<?php

namespace App\Services\Concerns;

use App\Enums\Order\OrderStatus;
use App\Helpers\OrderHelper;
use App\Jobs\Hosting\ProvisionHostingAccountJob;
use App\Jobs\VirtualMachine\Action\VMJobs;
use App\Jobs\VirtualMachine\Create\CreateVirtualMachineJob;
use App\Jobs\VirtualMachine\Provision\UpdateVmConfigJob;
use App\Http\Services\vCenter as ServiceVCenter;
use App\Models\Addon;
use App\Models\Invoice;
use App\Models\OrderItem;
use App\Models\Service;
use App\Models\ServiceAddon;
use App\Services\ActivityLogger;
use App\Services\CustomerRenewalNotifier;
use Carbon\Carbon;
use Carbon\CarbonInterface;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use App\Support\ServiceProvisionLog;

trait ActivatesPaidInvoices
{
    private function activateOrder(Invoice $invoice): void
    {
        $order = $invoice->order?->loadMissing(['orderItems.product', 'customer', 'invoice']);
        if (! $order) {
            return;
        }

        // payment_method/paid_at always mirror the invoice that was just paid, even if the
        // order's status doesn't change (e.g. it's already ACTIVE from an earlier payment).
        $order->update([
            'status' => OrderStatus::ACTIVE->value,
            'payment_method' => $invoice->payment_method,
            'paid_at' => $invoice->paid_at,
        ]);

        foreach ($order->orderItems as $item) {
            $isHostingProvision = ! $item->os_id
                && $item->server_name
                && $item->product?->product_type === 'hosting';

            $service = Service::firstOrCreate(
                ['order_item_id' => $item->id],
                [
                    'customer_id' => $order->customer_id,
                    'product_id' => $item->product_id,
                    'invoice_id' => $invoice->id,
                    'server_name' => $item->server_name,
                    'status' => ($item->os_id || $isHostingProvision) ? 'pending' : 'active',
                    'auto_renew' => false,
                    'started_at' => now(),
                    'expires_at' => now()->addMonths($item->months ?: OrderHelper::cycleToMonths($item->billing_cycle)),
                ]
            );

            $this->attachServiceAddons($service, $item);

            if ($service->wasRecentlyCreated && $service->status === 'pending') {
                ServiceProvisionLog::record($service, 'provision_requested', 'Khách hàng yêu cầu khởi tạo dịch vụ', [
                    'order_num' => $order->order_num,
                    'invoice_number' => $invoice->invoice_number,
                ]);
            }

            if ($service->wasRecentlyCreated && $item->product_id) {
                if ($item->os_id) {
                    dispatch(new CreateVirtualMachineJob($item));
                } elseif ($isHostingProvision) {
                    dispatch(new ProvisionHostingAccountJob($item));
                }
            }
        }
    }

    private function activateRenewal(Invoice $invoice): void
    {
        $service = Service::query()
            ->with(['orderItem.product'])
            ->where('invoice_id', $invoice->id)
            ->first();

        if (! $service) {
            return;
        }

        if ($invoice->order) {
            // Same rule as activateOrder(): payment_method/paid_at always mirror the invoice
            // that was just paid, regardless of whether the order's status actually changes.
            $invoice->order->update([
                'status' => OrderStatus::ACTIVE->value,
                'payment_method' => $invoice->payment_method,
                'paid_at' => $invoice->paid_at,
            ]);
        }

        $months = (int) ($invoice->invoiceItems()->where('type', 'renewal')->value('months') ?: $service->orderItem?->months ?: 1);
        $baseDate = $service->expires_at && $service->expires_at->isFuture()
            ? $service->expires_at
            : now();
        $expiresAt = Carbon::parse($baseDate)->addMonths($months);
        $previousExpiresAt = $service->expires_at;
        $previousStatus = $service->status;
        $wasCancelled = $previousStatus === 'cancelled';
        $wasScheduledCancel = (bool) $service->cancel_at_expiry;

        $service->update([
            'status' => 'active',
            'expires_at' => $expiresAt,
            'suspended_at' => null,
            'cancel_at_expiry' => false,
            'cancelled_at' => null,
        ]);

        if ($wasCancelled || $wasScheduledCancel) {
            app(ActivityLogger::class)->log(
                event: 'cancellation_revoked',
                logName: 'Service',
                description: "Dịch vụ #{$service->id} được gia hạn nên huỷ bỏ việc hủy dịch vụ"
                    .($wasCancelled ? ' (đã hủy → hoạt động lại)' : ' (hủy cuối kỳ)'),
                subject: $service,
                oldValues: ['status' => $previousStatus, 'cancel_at_expiry' => $wasScheduledCancel],
                newValues: ['status' => 'active', 'cancel_at_expiry' => false, 'invoice_number' => $invoice->invoice_number],
            );
        }

        app(ActivityLogger::class)->log(
            event: 'renewed',
            logName: 'Service',
            description: "Gia hạn dịch vụ #{$service->id} thêm {$months} tháng (hóa đơn #{$invoice->invoice_number})",
            subject: $service,
            oldValues: ['expires_at' => $previousExpiresAt?->toDateTimeString()],
            newValues: [
                'expires_at' => $expiresAt->toDateTimeString(),
                'months' => $months,
                'invoice_number' => $invoice->invoice_number,
                'amount' => (int) $invoice->total,
                'payment_method' => $invoice->payment_method,
            ],
        );

        if ($service->vm_id) {
            dispatch(new VMJobs((int) $service->vm_id, 'Start', false))->delay(now()->addSeconds(5));
        }

        $this->notifyAdminsOfRenewal($service, $invoice, $months, $previousExpiresAt);
    }

    private function notifyAdminsOfRenewal(Service $service, Invoice $invoice, int $months, ?CarbonInterface $previousExpiresAt): void
    {
        if (auth()->guard('admin')->check()) {
            return;
        }

        $source = auth()->guard('client')->check()
            ? CustomerRenewalNotifier::SOURCE_CUSTOMER
            : CustomerRenewalNotifier::SOURCE_SYSTEM;

        DB::afterCommit(fn () => app(CustomerRenewalNotifier::class)->notify($service->fresh(), $invoice, $months, $previousExpiresAt, $source));
    }

    /**
     * Merges the purchased addons into order_items.addons_meta (so RenewalPricing charges
     * them on the next renewal) and applies the new absolute CPU/RAM/disk totals to the VM.
     */
    private function activateUpgrade(Invoice $invoice): void
    {
        $service = Service::query()
            ->with(['orderItem.product', 'vmware'])
            ->find($invoice->service_id);

        $orderItem = $service?->orderItem;
        if (! $service || ! $orderItem) {
            return;
        }

        $upgradeItems = $invoice->invoiceItems()->where('type', 'upgrade')->get();
        if ($upgradeItems->isEmpty()) {
            return;
        }

        $meta = collect(is_array($orderItem->addons_meta) ? $orderItem->addons_meta : []);
        $purchasedCodes = [];

        foreach ($upgradeItems as $item) {
            $addon = Addon::find($item->addon_id);
            if (! $addon) {
                continue;
            }

            $code = strtolower((string) $addon->code);
            $purchasedCodes[] = $code;

            $qty = (int) $item->quantity;
            $index = $meta->search(fn ($entry) => (int) ($entry['addon_id'] ?? 0) === $addon->id);
            $currentQty = $index === false ? 0 : (int) ($meta->get($index)['qty'] ?? 0);
            $newQty = $currentQty + $qty;

            $entry = [
                'addon_id' => $addon->id,
                'code' => $code,
                'name' => $addon->name,
                'qty' => $newQty,
                'price' => (float) $addon->price,
                'subtotal' => $newQty * (float) $addon->price,
            ];

            if ($index === false) {
                $meta->push($entry);
            } else {
                $meta->put($index, $entry);
            }
        }

        $orderItem->update(['addons_meta' => $meta->values()->all()]);

        $moduleVmware = $service->vmware;
        if (! $moduleVmware) {
            return;
        }

        $addonQtyByCode = $meta->keyBy(fn ($entry) => $entry['code'] ?? '');
        $product = $orderItem->product;

        if (array_intersect(['cpu', 'ram'], $purchasedCodes)) {
            $totalCpu = (int) ($product?->cpu ?? 0) + (int) ($addonQtyByCode->get('cpu')['qty'] ?? 0);
            $totalRam = (int) ($product?->ram ?? 0) + (int) ($addonQtyByCode->get('ram')['qty'] ?? 0);

            UpdateVmConfigJob::dispatch(
                $moduleVmware->id,
                (string) $moduleVmware->vmware_id,
                '',
                $totalCpu,
                $totalRam,
            )->afterCommit();
        }

        if (in_array('disk', $purchasedCodes, true)) {
            $totalDisk = (int) ($product?->disk ?? 0) + (int) ($addonQtyByCode->get('disk')['qty'] ?? 0);
            $vcenter = $moduleVmware->vCenter ?? $moduleVmware->ipAddress?->host?->datacenter?->vCenter;

            if ($vcenter) {
                DB::afterCommit(function () use ($vcenter, $moduleVmware, $totalDisk, $invoice) {
                    try {
                        $serviceVCenter = new ServiceVCenter();
                        if (! $serviceVCenter->loginServer($vcenter)) {
                            throw new \RuntimeException('vCenter login failed');
                        }
                        $serviceVCenter->UpgradeDiskVirtualMachine($moduleVmware, $totalDisk);
                    } catch (\Throwable $e) {
                        Log::error('activateUpgrade: disk upgrade failed', [
                            'invoice_id' => $invoice->id,
                            'module_vmware_id' => $moduleVmware->id,
                            'total_disk' => $totalDisk,
                            'error' => $e->getMessage(),
                        ]);
                    }
                });
            }
        }
    }

    private function attachServiceAddons(Service $service, OrderItem $item): void
    {
        if ($service->addons()->exists()) {
            return;
        }

        $product = $item->product;
        if ($product) {
            foreach (['cpu' => $product->cpu, 'ram' => $product->ram, 'disk' => $product->disk, 'bandwidth' => $product->bandwidth] as $type => $value) {
                if ($value !== null && $value !== '') {
                    ServiceAddon::create([
                        'service_id' => $service->id,
                        'addon_type' => $type,
                        'addon_value' => (string) ($type === 'ram' ? (int) $value * 1024 : $value),
                        'price' => 0,
                    ]);
                }
            }
        }

        $addonsMeta = is_array($item->addons_meta)
            ? $item->addons_meta
            : json_decode($item->addons_meta ?? '[]', true);

        foreach ((array) $addonsMeta as $meta) {
            $addon = Addon::find($meta['addon_id'] ?? null);
            if (!$addon) {
                continue;
            }
            ServiceAddon::create([
                'service_id'  => $service->id,
                'addon_type'  => strtolower((string) $addon->code),
                'addon_value' => (string) (strtolower((string) $addon->code) === 'ram' ? (int) ($meta['qty'] ?? 1) * 1024 : ($meta['qty'] ?? 1)),
                'price'       => (int) ($meta['price'] ?? $addon->price),
            ]);
        }
    }
}