<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Shared\Models\Products\ModelParameter;

class ModelParameterRequest 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
    {
        $rules = [
            'model_id' => 'required|integer|exists:models,id',
            'name' => 'required|string|max:50|regex:/^[a-zA-Z][a-zA-Z0-9_]*$/',
            'label' => 'required|string|max:100',
            'type' => 'required|string|in:' . implode(',', ModelParameter::TYPES),
            'unit' => 'nullable|string|max:20',
            'validation_rules' => 'nullable|array',
            'options' => 'nullable|array',
            'default_value' => 'nullable',
            'order' => 'nullable|integer|min:1',
            'description' => 'nullable|string|max:500',
            'is_required' => 'boolean',
            'is_active' => 'boolean',
        ];

        // 타입별 세부 검증
        if ($this->input('type') === ModelParameter::TYPE_NUMBER) {
            $rules['validation_rules.min'] = 'nullable|numeric';
            $rules['validation_rules.max'] = 'nullable|numeric|gte:validation_rules.min';
            $rules['default_value'] = 'nullable|numeric';
        }

        if ($this->input('type') === ModelParameter::TYPE_SELECT) {
            $rules['options'] = 'required|array|min:1';
            $rules['options.*'] = 'required|string|max:100';
            $rules['default_value'] = 'nullable|string|in_array:options';
        }

        if ($this->input('type') === ModelParameter::TYPE_BOOLEAN) {
            $rules['default_value'] = 'nullable|boolean';
        }

        if ($this->input('type') === ModelParameter::TYPE_TEXT) {
            $rules['validation_rules.max_length'] = 'nullable|integer|min:1|max:1000';
            $rules['validation_rules.pattern'] = 'nullable|string|max:200';
            $rules['default_value'] = 'nullable|string';
        }

        return $rules;
    }

    /**
     * Get custom messages for validator errors.
     */
    public function messages(): array
    {
        return [
            'name.regex' => __('error.parameter_name_format'),
            'validation_rules.max.gte' => __('error.max_must_be_greater_than_min'),
            'options.required' => __('error.select_type_requires_options'),
            'options.min' => __('error.select_type_requires_options'),
            'default_value.in_array' => __('error.default_value_not_in_options'),
        ];
    }

    /**
     * Configure the validator instance.
     */
    public function withValidator($validator): void
    {
        $validator->after(function ($validator) {
            // 추가 검증 로직
            $this->validateParameterNameUnique($validator);
            $this->validateValidationRules($validator);
        });
    }

    /**
     * 매개변수명 중복 검증
     */
    private function validateParameterNameUnique($validator): void
    {
        if (!$this->input('model_id') || !$this->input('name')) {
            return;
        }

        $query = ModelParameter::where('model_id', $this->input('model_id'))
            ->where('name', $this->input('name'));

        // 수정 시 자기 자신 제외
        if ($this->route('id')) {
            $query->where('id', '!=', $this->route('id'));
        }

        if ($query->exists()) {
            $validator->errors()->add('name', __('error.parameter_name_duplicate'));
        }
    }

    /**
     * 검증 규칙 유효성 검증
     */
    private function validateValidationRules($validator): void
    {
        $type = $this->input('type');
        $validationRules = $this->input('validation_rules', []);

        if ($type === ModelParameter::TYPE_TEXT && isset($validationRules['pattern'])) {
            // 정규식 패턴 검증
            if (@preg_match($validationRules['pattern'], '') === false) {
                $validator->errors()->add('validation_rules.pattern', __('error.invalid_regex_pattern'));
            }
        }
    }
}