<?php

namespace App\Services;

use App\Models\Requisition;
use App\Models\Tenant;
use Illuminate\Support\Facades\Validator;
use Illuminate\Validation\ValidationException;

class ComparisonPolicy
{
    public const DEFAULTS = ['revision' => 0, 'configured' => false, 'minimum_proposals' => 3, 'minimum_evaluators' => 2,
        'weights' => ['price' => 40, 'quality' => 20, 'delivery' => 15, 'history' => 15, 'payment' => 10]];

    /** @return array{revision: int, configured: bool, minimum_proposals: int, minimum_evaluators: int, weights: array<string,int>} */
    public function company(Tenant $tenant): array
    {
        return $tenant->comparison_policy === null ? self::DEFAULTS : $this->checked($tenant->comparison_policy);
    }

    /** @return array{revision: int, configured: bool, minimum_proposals: int, minimum_evaluators: int, weights: array<string,int>} */
    public function forRequest(Requisition $request): array
    {
        return $request->comparison_policy === null ? self::DEFAULTS : $this->checked($request->comparison_policy);
    }

    /** @param array<string,mixed> $data
     * @return array{revision: int, configured: bool, minimum_proposals: int, minimum_evaluators: int, weights: array<string,int>}
     */
    public function checked(array $data): array
    {
        $rules = ['revision' => 'required|integer|min:0', 'configured' => 'required|boolean',
            'minimum_proposals' => 'required|integer|between:1,100', 'minimum_evaluators' => 'required|integer|between:1,100',
            'weights' => 'required|array:price,quality,delivery,history,payment'];
        foreach (array_keys(self::DEFAULTS['weights']) as $key) {
            $rules['weights.'.$key] = 'required|integer|between:0,100';
        }
        $valid = Validator::make($data, $rules)->validate();
        $weights = [];
        foreach (array_keys(self::DEFAULTS['weights']) as $key) {
            $weights[$key] = (int) $valid['weights'][$key];
        }
        if (array_sum($weights) !== 100) {
            throw ValidationException::withMessages(['weights' => 'A soma das ponderações deve ser exactamente 100%.']);
        }

        return ['revision' => (int) $valid['revision'], 'configured' => (bool) $valid['configured'],
            'minimum_proposals' => (int) $valid['minimum_proposals'], 'minimum_evaluators' => (int) $valid['minimum_evaluators'], 'weights' => $weights];
    }
}