<?php

namespace Modules\AssetExchange\Services;

use App\Business;
use App\User;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Modules\AssetExchange\Models\Appraisal;
use Modules\AssetExchange\Models\AppraisalLine;
use Modules\AssetExchange\Models\Deal;
use Modules\AssetExchange\Models\Listing;

class AssetExchangeCmmsBridgeService
{
    public function createEquipmentFromListing(Business $business, Listing $listing, ?User $user = null): ?object
    {
        if (! class_exists(\Modules\Maintenance\Models\Equipment::class)) {
            throw new \RuntimeException('ماژول نگهداری و تعمیرات (CMMS) نصب نیست.');
        }

        if (! Schema::hasTable('maintenance_equipment')) {
            throw new \RuntimeException('جدول تجهیزات CMMS موجود نیست.');
        }

        if ($listing->maintenance_equipment_id) {
            return \Modules\Maintenance\Models\Equipment::find($listing->maintenance_equipment_id);
        }

        $code = 'AEX-EQ-'.$listing->listing_code;

        $equipment = \Modules\Maintenance\Models\Equipment::create([
            'business_id' => $business->id,
            'customer_id' => $listing->seller_contact_id,
            'code' => $code,
            'name' => $listing->title,
            'manufacturer' => null,
            'model' => null,
            'serial_number' => null,
            'location' => $listing->location_text,
            'status' => 'inactive',
            'notes' => 'ایجاد از عرضه AssetExchange #'.$listing->listing_code,
            'created_by' => $user?->id,
        ]);

        $listing->update(['maintenance_equipment_id' => $equipment->id]);

        return $equipment;
    }

    public function startRebuildFromDeal(Business $business, Deal $deal, ?User $user = null): ?object
    {
        if (! class_exists(\Modules\Maintenance\Services\RebuildProcessService::class)) {
            throw new \RuntimeException('سرویس بازسازی CMMS در دسترس نیست.');
        }

        if (! Schema::hasTable('maintenance_rebuild_projects')) {
            throw new \RuntimeException('جدول پروژه‌های بازسازی موجود نیست.');
        }

        $deal->loadMissing('listing', 'appraisal');
        $listing = $deal->listing;

        if (! $listing) {
            throw new \RuntimeException('عرضه مرتبط با معامله یافت نشد.');
        }

        $equipmentId = $deal->maintenance_equipment_id ?: $listing->maintenance_equipment_id;

        if (! $equipmentId) {
            $equipment = $this->createEquipmentFromListing($business, $listing, $user);
            $equipmentId = $equipment?->id;
        }

        if (! $equipmentId) {
            throw new \RuntimeException('تجهیز CMMS برای شروع بازسازی یافت نشد.');
        }

        $rebuildService = app(\Modules\Maintenance\Services\RebuildProcessService::class);

        $project = $rebuildService->createProject($business, [
            'business_id' => $business->id,
            'title' => 'بازسازی — '.$listing->title,
            'description' => 'ایجاد از معامله AssetExchange '.$deal->deal_code,
            'scope_type' => 'equipment',
            'equipment_id' => $equipmentId,
            'estimated_cost' => $deal->appraisal?->renovation_cost_estimate ?? 0,
            'supervisor_id' => $user?->id,
        ], [$equipmentId], $user);

        $deal->update([
            'maintenance_rebuild_id' => $project->id,
            'maintenance_equipment_id' => $equipmentId,
            'status' => 'in_progress',
        ]);

        if ($deal->appraisal) {
            try {
                $this->populateMaterialListFromAppraisal($business, $project, $deal->appraisal, $user);
            } catch (\Throwable) {
            }
        }

        return $project;
    }

    public function populateMaterialListFromAppraisal(Business $business, object $rebuildProject, Appraisal $appraisal, ?User $user = null): int
    {
        if (! class_exists(\Modules\Maintenance\Services\MaterialListService::class)) {
            return 0;
        }

        $materialService = app(\Modules\Maintenance\Services\MaterialListService::class);
        $list = $materialService->getOrCreateList($business, 'rebuild', $rebuildProject->id, $user);

        $lines = AppraisalLine::where('appraisal_id', $appraisal->id)
            ->where('renovation_need', '!=', 'none')
            ->orderBy('sort_order')
            ->get();

        $added = 0;
        foreach ($lines as $line) {
            $materialService->addLine($list, [
                'part_name' => $line->name,
                'quantity' => 1,
                'notes' => trim(($line->condition_notes ?? '').' [AEX renovation: '.$line->renovation_need.']'),
            ]);
            $added++;
        }

        return $added;
    }

    public function importEquipmentPartsToAppraisal(Appraisal $appraisal, ?int $equipmentId = null, bool $replaceExisting = false): int
    {
        if (! class_exists(\Modules\Maintenance\Models\EquipmentPart::class)) {
            throw new \RuntimeException('ماژول CMMS نصب نیست.');
        }

        if (! Schema::hasTable('maintenance_equipment_parts')) {
            throw new \RuntimeException('جدول قطعات تجهیز موجود نیست.');
        }

        $appraisal->loadMissing('listing');
        $equipmentId = $equipmentId
            ?: $appraisal->listing?->maintenance_equipment_id;

        if (! $equipmentId) {
            throw new \RuntimeException('شناسه تجهیز CMMS برای واردسازی مشخص نشده است.');
        }

        $parts = \Modules\Maintenance\Models\EquipmentPart::where('business_id', $appraisal->business_id)
            ->where('equipment_id', $equipmentId)
            ->orderBy('id')
            ->get();

        if ($parts->isEmpty()) {
            throw new \RuntimeException('قطعه‌ای برای این تجهیز در CMMS ثبت نشده است.');
        }

        if ($replaceExisting) {
            AppraisalLine::where('appraisal_id', $appraisal->id)->delete();
        }

        return DB::transaction(function () use ($appraisal, $parts) {
            $partMap = [];
            $sort = 0;
            $created = 0;

            $roots = $parts->whereNull('parent_id');
            $this->importPartTree($appraisal, $parts, $roots, null, $partMap, $sort, $created);

            return $created;
        });
    }

    protected function importPartTree(
        Appraisal $appraisal,
        $allParts,
        $nodes,
        ?int $parentLineId,
        array &$partMap,
        int &$sort,
        int &$created
    ): void {
        foreach ($nodes as $part) {
            $line = AppraisalLine::create([
                'business_id' => $appraisal->business_id,
                'appraisal_id' => $appraisal->id,
                'parent_line_id' => $parentLineId,
                'line_kind' => $part->is_consumable ? 'consumable' : 'part',
                'name' => $part->part_name,
                'maintenance_equipment_part_id' => $part->id,
                'health_percentage' => $part->health_percentage ?? 100,
                'condition_notes' => $part->notes,
                'renovation_need' => 'none',
                'replacement_cost' => 0,
                'keep_in_line' => true,
                'sort_order' => $sort++,
            ]);

            $partMap[$part->id] = $line->id;
            $created++;

            $children = $allParts->where('parent_id', $part->id);
            if ($children->isNotEmpty()) {
                $this->importPartTree($appraisal, $allParts, $children, $line->id, $partMap, $sort, $created);
            }
        }
    }
}