<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class ProductFromModelRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(): array
    {
        return [
            'model_id' => 'required|integer|exists:models,id',
            'parameters' => 'required|array',
            'parameters.*' => 'required',
            'product_data' => 'nullable|array',
            'product_data.name' => 'nullable|string|max:200',
            'product_data.code' => 'nullable|string|max:100|unique:products,code',
            'product_data.description' => 'nullable|string|max:1000',
            'product_data.category_id' => 'nullable|integer|exists:categories,id',
            'product_data.memo' => 'nullable|string|max:500',
        ];
    }

    /**
     * Get custom messages for validator errors.
     */
    public function messages(): array
    {
        return [
            'model_id.required' => __('error.model_id_required'),
            'model_id.exists' => __('error.model_not_found'),
            'parameters.required' => __('error.parameters_required'),
            'parameters.array' => __('error.parameters_must_be_array'),
            'product_data.code.unique' => __('error.product_code_duplicate'),
        ];
    }

    /**
     * Configure the validator instance.
     */
    public function withValidator($validator): void
    {
        $validator->after(function ($validator) {
            $this->validateParameters($validator);
            $this->validateProductData($validator);
        });
    }

    /**
     * 매개변수 검증
     */
    private function validateParameters($validator): void
    {
        if (!$this->input('model_id') || !$this->input('parameters')) {
            return;
        }

        try {
            $parameterService = new \App\Services\ModelParameterService();
            $errors = $parameterService->validateParameterValues(
                $this->input('model_id'),
                $this->input('parameters')
            );

            if (!empty($errors)) {
                foreach ($errors as $paramName => $paramErrors) {
                    foreach ($paramErrors as $error) {
                        $validator->errors()->add("parameters.{$paramName}", $error);
                    }
                }
            }
        } catch (\Throwable $e) {
            $validator->errors()->add('parameters', __('error.parameter_validation_failed'));
        }
    }

    /**
     * 제품 데이터 검증
     */
    private function validateProductData($validator): void
    {
        $productData = $this->input('product_data', []);

        // 제품 코드 중복 검증 (수정 시 제외)
        if (!empty($productData['code'])) {
            $query = \Shared\Models\Products\Product::where('code', $productData['code']);

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

            if ($query->exists()) {
                $validator->errors()->add('product_data.code', __('error.product_code_duplicate'));
            }
        }

        // 카테고리 존재 확인
        if (!empty($productData['category_id'])) {
            $categoryExists = \Shared\Models\Products\Category::where('id', $productData['category_id'])
                ->where('is_active', true)
                ->exists();

            if (!$categoryExists) {
                $validator->errors()->add('product_data.category_id', __('error.category_not_found'));
            }
        }
    }

    /**
     * Prepare the data for validation.
     */
    protected function prepareForValidation(): void
    {
        // JSON 문자열인 경우 배열로 변환
        if ($this->has('parameters') && is_string($this->input('parameters'))) {
            $this->merge([
                'parameters' => json_decode($this->input('parameters'), true) ?? []
            ]);
        }

        if ($this->has('product_data') && is_string($this->input('product_data'))) {
            $this->merge([
                'product_data' => json_decode($this->input('product_data'), true) ?? []
            ]);
        }
    }
}