<?php

namespace Modules\AssetExchange\Services;

use App\Business;
use App\User;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;
use Modules\AssetExchange\Models\Listing;
use Modules\AssetExchange\Utils\AssetExchangeUtil;

class ListingService
{
    public function __construct(
        protected AssetExchangeUtil $aexUtil,
        protected PipelineService $pipelineService
    ) {
    }

    public function create(Business $business, array $data, ?User $user = null): Listing
    {
        if (! Schema::hasTable('aex_listings')) {
            throw new \RuntimeException('جدول عرضه‌ها هنوز ایجاد نشده است.');
        }

        return DB::transaction(function () use ($business, $data, $user) {
            $listing = Listing::create([
                'business_id' => $business->id,
                'listing_code' => $data['listing_code'] ?? $this->aexUtil->generateListingCode($business->id),
                'seller_contact_id' => $data['seller_contact_id'] ?? null,
                'listing_type' => $data['listing_type'] ?? 'machine_used',
                'scope_type' => $data['scope_type'] ?? 'whole',
                'title' => $data['title'],
                'description' => $data['description'] ?? null,
                'location_text' => $data['location_text'] ?? null,
                'site_country' => $data['site_country'] ?? null,
                'year_manufactured' => $data['year_manufactured'] ?? null,
                'condition_grade' => $data['condition_grade'] ?? null,
                'asking_price' => (int) ($data['asking_price'] ?? 0),
                'currency_id' => $data['currency_id'] ?? null,
                'price_negotiable' => $data['price_negotiable'] ?? true,
                'visibility' => $data['visibility'] ?? 'internal',
                'status' => 'draft',
                'ie_line_template_id' => $data['ie_line_template_id'] ?? null,
                'ie_line_revision_id' => $data['ie_line_revision_id'] ?? null,
                'ie_bom_id' => $data['ie_bom_id'] ?? null,
                'ie_installed_asset_id' => $data['ie_installed_asset_id'] ?? null,
                'maintenance_equipment_id' => $data['maintenance_equipment_id'] ?? null,
                'asset_id' => $data['asset_id'] ?? null,
                'parent_listing_id' => $data['parent_listing_id'] ?? null,
                'photos' => $data['photos'] ?? null,
                'documents' => $data['documents'] ?? null,
                'created_by' => $user?->id,
            ]);

            $this->pipelineService->advanceStage($business, $listing, 'draft_listing', null, null, null, $user);
            $this->pipelineService->logEvent(
                $business,
                Listing::class,
                $listing->id,
                'listing_created',
                'عرضه جدید ثبت شد: '.$listing->title,
                $user
            );

            return $listing->fresh();
        });
    }

    public function update(Listing $listing, array $data, ?User $user = null): Listing
    {
        if (in_array($listing->status, ['sold', 'rejected', 'withdrawn'], true)) {
            throw new \RuntimeException('عرضه در وضعیت فعلی قابل ویرایش نیست.');
        }

        $listing->update(collect($data)->only($listing->getFillable())->toArray());

        $this->pipelineService->logEvent(
            $listing->business,
            Listing::class,
            $listing->id,
            'listing_updated',
            'عرضه به‌روزرسانی شد',
            $user
        );

        return $listing->fresh();
    }

    public function submit(Business $business, Listing $listing, ?User $user = null): Listing
    {
        if ($listing->status !== 'draft') {
            throw new \RuntimeException('فقط عرضه‌های پیش‌نویس قابل ارسال هستند.');
        }

        if (empty($listing->title)) {
            throw new \RuntimeException('عنوان عرضه الزامی است.');
        }

        return DB::transaction(function () use ($business, $listing, $user) {
            $listing->update([
                'status' => 'submitted',
                'submitted_at' => now(),
            ]);

            $this->pipelineService->advanceStage($business, $listing, 'submitted', null, null, null, $user);
            $this->pipelineService->logEvent(
                $business,
                Listing::class,
                $listing->id,
                'listing_submitted',
                'عرضه برای بررسی ارسال شد',
                $user
            );

            return $listing->fresh();
        });
    }

    public function assignBroker(Business $business, Listing $listing, int $brokerUserId, ?User $user = null): Listing
    {
        if (! in_array($listing->status, ['submitted', 'under_review'], true)) {
            throw new \RuntimeException('تخصیص کارشناس فقط برای عرضه‌های ارسال‌شده یا در حال بررسی مجاز است.');
        }

        return DB::transaction(function () use ($business, $listing, $brokerUserId, $user) {
            $listing->update([
                'assigned_broker_user_id' => $brokerUserId,
                'status' => 'under_review',
            ]);

            $this->pipelineService->advanceStage($business, $listing, 'under_review', null, null, null, $user);
            $this->pipelineService->logEvent(
                $business,
                Listing::class,
                $listing->id,
                'broker_assigned',
                'کارشناس/واسط اختصاص داده شد',
                $user,
                ['broker_user_id' => $brokerUserId]
            );

            return $listing->fresh();
        });
    }

    public function reject(Business $business, Listing $listing, ?string $reason = null, ?User $user = null): Listing
    {
        return DB::transaction(function () use ($business, $listing, $reason, $user) {
            $listing->update(['status' => 'rejected']);

            $this->pipelineService->advanceStage($business, $listing, 'rejected', null, null, null, $user);
            $this->pipelineService->logEvent(
                $business,
                Listing::class,
                $listing->id,
                'listing_rejected',
                $reason ?: 'عرضه رد شد',
                $user
            );

            return $listing->fresh();
        });
    }

    public function markAppraised(Business $business, Listing $listing, ?User $user = null): Listing
    {
        return DB::transaction(function () use ($business, $listing, $user) {
            $listing->update([
                'status' => 'appraised',
                'appraised_at' => now(),
            ]);

            $this->pipelineService->advanceStage($business, $listing, 'appraised', null, null, null, $user);
            $this->pipelineService->logEvent(
                $business,
                Listing::class,
                $listing->id,
                'listing_appraised',
                'کارشناسی عرضه تکمیل شد',
                $user
            );

            return $listing->fresh();
        });
    }

    public function listQuery(int $businessId, array $filters = []): Builder
    {
        $query = Listing::query()
            ->where('business_id', $businessId)
            ->with(['seller', 'broker', 'appraisals', 'deals']);

        if (! empty($filters['status'])) {
            $query->where('status', $filters['status']);
        }

        if (! empty($filters['listing_type'])) {
            $query->where('listing_type', $filters['listing_type']);
        }

        if (! empty($filters['scope_type'])) {
            $query->where('scope_type', $filters['scope_type']);
        }

        if (! empty($filters['seller_contact_id'])) {
            $query->where('seller_contact_id', (int) $filters['seller_contact_id']);
        }

        if (! empty($filters['assigned_broker_user_id'])) {
            $query->where('assigned_broker_user_id', (int) $filters['assigned_broker_user_id']);
        }

        if (! empty($filters['visibility'])) {
            $query->where('visibility', $filters['visibility']);
        }

        if (! empty($filters['search'])) {
            $term = '%'.$filters['search'].'%';
            $query->where(function ($q) use ($term) {
                $q->where('title', 'like', $term)
                    ->orWhere('listing_code', 'like', $term)
                    ->orWhere('location_text', 'like', $term);
            });
        }

        if (! empty($filters['submitted_from'])) {
            $query->whereDate('submitted_at', '>=', $this->aexUtil->parseInputDate($filters['submitted_from']));
        }

        if (! empty($filters['submitted_to'])) {
            $query->whereDate('submitted_at', '<=', $this->aexUtil->parseInputDate($filters['submitted_to']));
        }

        if (! empty($filters['has_ie_bom'])) {
            $query->whereNotNull('ie_bom_id');
        }

        if (! empty($filters['has_equipment'])) {
            $query->whereNotNull('maintenance_equipment_id');
        }

        $sortBy = $filters['sort_by'] ?? 'created_at';
        $sortDir = $filters['sort_dir'] ?? 'desc';
        $allowedSort = ['created_at', 'submitted_at', 'asking_price', 'title', 'status'];
        if (in_array($sortBy, $allowedSort, true)) {
            $query->orderBy($sortBy, $sortDir === 'asc' ? 'asc' : 'desc');
        }

        return $query;
    }
}