<?php

namespace App\Services\Design;

use App\Models\Design\DesignModel;
use App\Models\Design\ModelVersion;
use App\Services\Service;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;

class ModelVersionService extends Service
{
    /** 특정 모델의 버전 목록 */
    public function listByModel(int $modelId)
    {
        $tenantId = $this->tenantId();

        $model = DesignModel::query()
            ->where('tenant_id', $tenantId)
            ->find($modelId);

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

        return ModelVersion::query()
            ->where('tenant_id', $tenantId)
            ->where('model_id', $modelId)
            ->orderBy('version_no')
            ->get();
    }

    /** DRAFT 생성 (version_no 자동/수동) */
    public function createDraft(int $modelId, array $extra = []): ModelVersion
    {
        $tenantId = $this->tenantId();

        $model = DesignModel::query()
            ->where('tenant_id', $tenantId)
            ->find($modelId);

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

        return DB::transaction(function () use ($tenantId, $model, $extra) {
            $versionNo = $extra['version_no'] ?? null;

            if ($versionNo === null) {
                $max = ModelVersion::query()
                    ->where('model_id', $model->id)
                    ->max('version_no');
                $versionNo = (int)($max ?? 0) + 1;
            } else {
                $exists = ModelVersion::query()
                    ->where('model_id', $model->id)
                    ->where('version_no', $versionNo)
                    ->exists();
                if ($exists) {
                    throw ValidationException::withMessages(['version_no' => __('error.duplicate')]);
                }
            }

            return ModelVersion::create([
                'tenant_id'      => $tenantId,
                'model_id'       => $model->id,
                'version_no'     => $versionNo,
                'status'         => 'DRAFT',
                'is_active'      => true,
                'notes'          => $extra['notes'] ?? null,
                'effective_from' => $extra['effective_from'] ?? null,
                'effective_to'   => $extra['effective_to'] ?? null,
            ]);
        });
    }

    /** RELEASED 전환 */
    public function release(int $versionId): ModelVersion
    {
        $tenantId = $this->tenantId();

        $mv = ModelVersion::query()
            ->where('tenant_id', $tenantId)
            ->find($versionId);

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

        if ($mv->status === 'RELEASED') {
            return $mv; // 멱등
        }

        // TODO: 대표 템플릿 존재 등 사전 검증 훅 가능
        $mv->status = 'RELEASED';
        $mv->effective_from = $mv->effective_from ?? now();
        $mv->save();

        return $mv;
    }
}