<?php

namespace App\Services;

use App\Models\Orders\Client;
use Illuminate\Support\Facades\Validator;
use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class ClientService extends Service
{
    /** 목록(검색/페이징) */
    public function index(array $params)
    {
        $tenantId = $this->tenantId();

        $page = (int)($params['page'] ?? 1);
        $size = (int)($params['size'] ?? 20);
        $q = trim((string)($params['q'] ?? ''));
        $onlyActive = $params['only_active'] ?? null;

        $query = Client::query()->where('tenant_id', $tenantId);

        if ($q !== '') {
            $query->where(function ($qq) use ($q) {
                $qq->where('name', 'like', "%{$q}%")
                    ->orWhere('client_code', 'like', "%{$q}%")
                    ->orWhere('contact_person', 'like', "%{$q}%");
            });
        }

        if ($onlyActive !== null) {
            $query->where('is_active', $onlyActive ? 'Y' : 'N');
        }

        $query->orderBy('client_code')->orderBy('id');

        return $query->paginate($size, ['*'], 'page', $page);
    }

    /** 단건 */
    public function show(int $id)
    {
        $tenantId = $this->tenantId();
        $client = Client::where('tenant_id', $tenantId)->find($id);
        if (!$client) {
            throw new NotFoundHttpException(__('error.not_found'));
        }
        return $client;
    }

    /** 생성 */
    public function store(array $params)
    {
        $tenantId = $this->tenantId();
        $uid = $this->apiUserId();

        $v = Validator::make($params, [
            'client_code' => 'required|string|max:50',
            'name' => 'required|string|max:100',
            'contact_person' => 'nullable|string|max:50',
            'phone' => 'nullable|string|max:30',
            'email' => 'nullable|email|max:80',
            'address' => 'nullable|string|max:255',
            'is_active' => 'nullable|in:Y,N',
        ]);

        if ($v->fails()) {
            throw new BadRequestHttpException($v->errors()->first());
        }

        $data = $v->validated();

        // client_code 중복 검사
        $exists = Client::where('tenant_id', $tenantId)
            ->where('client_code', $data['client_code'])
            ->exists();
        if ($exists) {
            throw new BadRequestHttpException(__('error.duplicate_code'));
        }

        $data['tenant_id'] = $tenantId;
        $data['is_active'] = $data['is_active'] ?? 'Y';

        return Client::create($data);
    }

    /** 수정 */
    public function update(int $id, array $params)
    {
        $tenantId = $this->tenantId();
        $uid = $this->apiUserId();

        $client = Client::where('tenant_id', $tenantId)->find($id);
        if (!$client) {
            throw new NotFoundHttpException(__('error.not_found'));
        }

        $v = Validator::make($params, [
            'client_code' => 'sometimes|required|string|max:50',
            'name' => 'sometimes|required|string|max:100',
            'contact_person' => 'nullable|string|max:50',
            'phone' => 'nullable|string|max:30',
            'email' => 'nullable|email|max:80',
            'address' => 'nullable|string|max:255',
            'is_active' => 'nullable|in:Y,N',
        ]);

        if ($v->fails()) {
            throw new BadRequestHttpException($v->errors()->first());
        }

        $payload = $v->validated();

        // client_code 변경 시 중복 검사
        if (isset($payload['client_code']) && $payload['client_code'] !== $client->client_code) {
            $exists = Client::where('tenant_id', $tenantId)
                ->where('client_code', $payload['client_code'])
                ->exists();
            if ($exists) {
                throw new BadRequestHttpException(__('error.duplicate_code'));
            }
        }

        $client->update($payload);
        return $client->refresh();
    }

    /** 삭제 */
    public function destroy(int $id)
    {
        $tenantId = $this->tenantId();

        $client = Client::where('tenant_id', $tenantId)->find($id);
        if (!$client) {
            throw new NotFoundHttpException(__('error.not_found'));
        }

        // 주문 존재 검사
        if ($client->orders()->exists()) {
            throw new BadRequestHttpException(__('error.has_orders'));
        }

        $client->delete();
        return 'success';
    }

    /** 활성/비활성 토글 */
    public function toggle(int $id)
    {
        $tenantId = $this->tenantId();
        $client = Client::where('tenant_id', $tenantId)->find($id);
        if (!$client) {
            throw new NotFoundHttpException(__('error.not_found'));
        }

        $client->is_active = $client->is_active === 'Y' ? 'N' : 'Y';
        $client->save();
        return $client->refresh();
    }
}