<?php

declare(strict_types=1);

namespace App\Support\Baselines\CompareSemantics;

use Illuminate\Contracts\Support\Arrayable;
use JsonSerializable;

/**
 * @implements Arrayable<string, mixed>
 */
final readonly class CompareSubjectOutcome implements Arrayable, JsonSerializable
{
    /**
     * @param  array<string, mixed>  $subject
     * @param  array<string, mixed>  $proof
     */
    public function __construct(
        public CompareResultReason $reason,
        public CompareResultCategory $category,
        public CompareResultActionability $actionability,
        public CompareResultReadinessImpact $readinessImpact,
        public CompareResultIdentityStatus $identityStatus,
        public CompareResultComparisonStatus $comparisonStatus,
        public CompareResultCoverageStatus $coverageStatus,
        public CompareResultTrustLevel $trustLevel,
        public array $subject = [],
        public array $proof = [],
    ) {}

    public function isBlocking(): bool
    {
        return in_array($this->readinessImpact, [
            CompareResultReadinessImpact::CustomerBlocker,
            CompareResultReadinessImpact::InternalBlocker,
        ], true);
    }

    public function toArray(): array
    {
        return [
            'reason' => $this->reason->value,
            'category' => $this->category->value,
            'actionability' => $this->actionability->value,
            'readiness_impact' => $this->readinessImpact->value,
            'identity_status' => $this->identityStatus->value,
            'comparison_status' => $this->comparisonStatus->value,
            'coverage_status' => $this->coverageStatus->value,
            'trust_level' => $this->trustLevel->value,
            'subject' => $this->safeArray($this->subject),
            'proof' => $this->safeArray($this->proof),
        ];
    }

    public function jsonSerialize(): array
    {
        return $this->toArray();
    }

    /**
     * @param  array<array-key, mixed>  $value
     * @return array<array-key, mixed>
     */
    private function safeArray(array $value, bool $topLevel = true): array
    {
        $safe = [];

        foreach ($value as $key => $item) {
            if (! $this->isSafeArrayKey($key, $topLevel)) {
                continue;
            }

            $safe[$key] = $this->safeValue($item);
        }

        return $safe;
    }

    private function safeValue(mixed $value): mixed
    {
        if (is_scalar($value) || $value === null) {
            return $value;
        }

        if (is_array($value)) {
            return $this->safeArray($value, false);
        }

        if ($value instanceof \Stringable) {
            return (string) $value;
        }

        if (is_object($value)) {
            return get_debug_type($value);
        }

        if (is_resource($value)) {
            return 'resource:'.get_resource_type($value);
        }

        return get_debug_type($value);
    }

    private function isSafeArrayKey(string|int $key, bool $topLevel): bool
    {
        if (is_string($key)) {
            return $key !== '';
        }

        return ! $topLevel;
    }
}