<?php

namespace App\Services\Equipment;

use App\Models\Equipment\Equipment;
use App\Models\Equipment\EquipmentInspection;
use App\Services\Service;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\DB;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class EquipmentService extends Service
{
    public function index(array $filters = []): LengthAwarePaginator
    {
        $query = Equipment::query()->with(['manager', 'subManager']);

        if (! empty($filters['search'])) {
            $search = $filters['search'];
            $query->where(function ($q) use ($search) {
                $q->where('equipment_code', 'like', "%{$search}%")
                    ->orWhere('name', 'like', "%{$search}%");
            });
        }

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

        if (! empty($filters['production_line'])) {
            $query->byLine($filters['production_line']);
        }

        if (! empty($filters['equipment_type'])) {
            $query->byType($filters['equipment_type']);
        }

        $sortBy = $filters['sort_by'] ?? 'sort_order';
        $sortDir = $filters['sort_direction'] ?? 'asc';
        $query->orderBy($sortBy, $sortDir);

        return $query->paginate($filters['per_page'] ?? 20);
    }

    public function show(int $id): Equipment
    {
        $equipment = Equipment::with(['manager', 'subManager', 'inspectionTemplates', 'repairs', 'processes', 'photos'])->find($id);

        if (! $equipment) {
            throw new NotFoundHttpException(__('error.equipment.not_found'));
        }

        return $equipment;
    }

    public function store(array $data): Equipment
    {
        return DB::transaction(function () use ($data) {
            $data['tenant_id'] = $this->tenantId();

            return Equipment::create($data);
        });
    }

    public function update(int $id, array $data): Equipment
    {
        return DB::transaction(function () use ($id, $data) {
            $equipment = Equipment::find($id);

            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $equipment->update($data);

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

    public function destroy(int $id): bool
    {
        return DB::transaction(function () use ($id) {
            $equipment = Equipment::find($id);

            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            return $equipment->delete();
        });
    }

    public function restore(int $id): Equipment
    {
        return DB::transaction(function () use ($id) {
            $equipment = Equipment::onlyTrashed()->find($id);

            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $equipment->restore();

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

    public function toggleActive(int $id): Equipment
    {
        return DB::transaction(function () use ($id) {
            $equipment = Equipment::find($id);

            if (! $equipment) {
                throw new NotFoundHttpException(__('error.equipment.not_found'));
            }

            $equipment->update(['is_active' => ! $equipment->is_active]);

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

    public function stats(): array
    {
        $total = Equipment::count();
        $active = Equipment::where('status', 'active')->count();
        $idle = Equipment::where('status', 'idle')->count();
        $disposed = Equipment::where('status', 'disposed')->count();

        // 설비 유형별 현황
        $typeDistribution = Equipment::where('status', '!=', 'disposed')
            ->whereNotNull('equipment_type')
            ->selectRaw('equipment_type, count(*) as count')
            ->groupBy('equipment_type')
            ->orderByDesc('count')
            ->get()
            ->toArray();

        // 이번달 점검 현황
        $yearMonth = now()->format('Y-m');
        $targetCount = Equipment::where('status', 'active')->count();
        $completedCount = EquipmentInspection::where('year_month', $yearMonth)->distinct('equipment_id')->count('equipment_id');
        $issueCount = EquipmentInspection::where('year_month', $yearMonth)
            ->where(function ($q) {
                $q->whereNotNull('issue_note')->where('issue_note', '!=', '');
            })
            ->count();

        return [
            'total' => $total,
            'active' => $active,
            'idle' => $idle,
            'disposed' => $disposed,
            'type_distribution' => $typeDistribution,
            'inspection_stats' => [
                'target_count' => $targetCount,
                'completed_count' => $completedCount,
                'issue_count' => $issueCount,
            ],
        ];
    }

    public function options(): array
    {
        return [
            'equipment_types' => Equipment::getEquipmentTypes(),
            'production_lines' => Equipment::getProductionLines(),
            'statuses' => Equipment::getStatuses(),
            'equipment_list' => Equipment::active()
                ->orderBy('sort_order')
                ->orderBy('name')
                ->get(['id', 'equipment_code', 'name', 'equipment_type', 'production_line']),
        ];
    }

    public function typeStats(): array
    {
        return Equipment::where('status', '!=', 'disposed')
            ->selectRaw('equipment_type, count(*) as count')
            ->groupBy('equipment_type')
            ->pluck('count', 'equipment_type')
            ->toArray();
    }
}