<?php

namespace App\Services;

use App\Models\Tenants\Tenant;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Database\Eloquent\Collection;

class TenantService
{
    /**
     * 테넌트 목록 조회 (페이지네이션)
     */
    public function getTenants(array $filters = [], int $perPage = 15): LengthAwarePaginator
    {
        $query = Tenant::query()
            ->withCount(['users', 'departments', 'menus', 'roles'])
            ->withTrashed();

        // 검색 필터
        if (!empty($filters['search'])) {
            $search = $filters['search'];
            $query->where(function ($q) use ($search) {
                $q->where('company_name', 'like', "%{$search}%")
                  ->orWhere('code', 'like', "%{$search}%")
                  ->orWhere('email', 'like', "%{$search}%");
            });
        }

        // 상태 필터
        if (!empty($filters['tenant_st_code'])) {
            $query->where('tenant_st_code', $filters['tenant_st_code']);
        }

        // Soft Delete 필터
        if (isset($filters['trashed'])) {
            if ($filters['trashed'] === 'only') {
                $query->onlyTrashed();
            } elseif ($filters['trashed'] === 'with') {
                $query->withTrashed();
            }
        }

        // 정렬
        $sortBy = $filters['sort_by'] ?? 'id';
        $sortDirection = $filters['sort_direction'] ?? 'desc';
        $query->orderBy($sortBy, $sortDirection);

        return $query->paginate($perPage);
    }

    /**
     * 특정 테넌트 조회
     */
    public function getTenantById(int $id, bool $withTrashed = false): ?Tenant
    {
        $query = Tenant::query()->withCount(['users', 'departments', 'menus', 'roles']);

        if ($withTrashed) {
            $query->withTrashed();
        }

        return $query->find($id);
    }

    /**
     * 테넌트 생성
     */
    public function createTenant(array $data): Tenant
    {
        return Tenant::create($data);
    }

    /**
     * 테넌트 수정
     */
    public function updateTenant(int $id, array $data): bool
    {
        $tenant = Tenant::findOrFail($id);
        return $tenant->update($data);
    }

    /**
     * 테넌트 삭제 (Soft Delete)
     */
    public function deleteTenant(int $id): bool
    {
        $tenant = Tenant::findOrFail($id);
        return $tenant->delete();
    }

    /**
     * 테넌트 복원
     */
    public function restoreTenant(int $id): bool
    {
        $tenant = Tenant::onlyTrashed()->findOrFail($id);
        return $tenant->restore();
    }

    /**
     * 테넌트 영구 삭제 (슈퍼관리자 전용)
     */
    public function forceDeleteTenant(int $id): bool
    {
        $tenant = Tenant::withTrashed()->findOrFail($id);
        return $tenant->forceDelete();
    }

    /**
     * 활성 테넌트 목록 (드롭다운용)
     */
    public function getActiveTenants(): Collection
    {
        return Tenant::query()
            ->active()
            ->orderBy('company_name')
            ->get(['id', 'company_name', 'code']);
    }

    /**
     * 테넌트 코드 중복 체크
     */
    public function isCodeExists(string $code, ?int $excludeId = null): bool
    {
        $query = Tenant::where('code', $code);

        if ($excludeId) {
            $query->where('id', '!=', $excludeId);
        }

        return $query->exists();
    }

    /**
     * 테넌트 통계
     */
    public function getTenantStats(): array
    {
        return [
            'total' => Tenant::count(),
            'active' => Tenant::where('tenant_st_code', 'active')->count(),
            'trial' => Tenant::where('tenant_st_code', 'trial')->count(),
            'suspended' => Tenant::where('tenant_st_code', 'suspended')->count(),
            'expired' => Tenant::where('tenant_st_code', 'expired')->count(),
            'trashed' => Tenant::onlyTrashed()->count(),
        ];
    }
}