<?php

namespace App\Services\JobApi\Transformers;

use App\Services\JobApi\DTO\JobData;
use App\Services\JobApi\Exceptions\TransformationException;
use DateTime;

class AdzunaTransformer implements JobTransformer
{
    public function transform(array $data): JobData
    {
        try {
            return new JobData(
                externalId: (string) $data['id'],
                title: $data['title'] ?? 'Untitled',
                company: $data['company']['display_name'] ?? 'Unknown Company',
                description: $this->sanitizeDescription($data['description'] ?? ''),
                location: $this->parseLocation($data),
                salaryMin: $data['salary_min'] ?? null,
                salaryMax: $data['salary_max'] ?? null,
                salaryCurrency: 'USD',
                jobType: $this->mapJobType($data['contract_type'] ?? null),
                sourceUrl: $data['redirect_url'] ?? null,
                applyUrl: $data['redirect_url'] ?? null,
                postedAt: $this->parseDate($data['created'] ?? null),
                expiresAt: null,
                remoteAllowed: $this->isRemote($data),
                experienceLevel: null,
                category: $data['category']['label'] ?? null,
                rawData: $data,
            );
        } catch (\Throwable $e) {
            throw new TransformationException(
                'Adzuna',
                'Failed to transform Adzuna job data: ' . $e->getMessage(),
                ['data' => $data, 'error' => $e->getMessage()]
            );
        }
    }

    public function transformMany(array $jobs): array
    {
        return array_map(fn($job) => $this->transform($job), $jobs);
    }

    private function sanitizeDescription(string $description): string
    {
        $clean = strip_tags($description);
        $clean = html_entity_decode($clean, ENT_QUOTES | ENT_HTML5, 'UTF-8');
        $clean = preg_replace('/\s+/', ' ', $clean);
        return trim($clean);
    }

    private function parseLocation(array $data): ?string
    {
        $location = $data['location']['display_name'] ?? null;

        if (empty($location)) {
            // Fallback to area
            $area = $data['location']['area'] ?? [];
            if (!empty($area)) {
                return implode(', ', $area);
            }
        }

        return $location;
    }

    private function isRemote(array $data): bool
    {
        $title = strtolower($data['title'] ?? '');
        $description = strtolower($data['description'] ?? '');
        $location = strtolower($data['location']['display_name'] ?? '');

        return str_contains($title, 'remote') ||
               str_contains($description, 'remote') ||
               str_contains($location, 'remote');
    }

    private function parseDate(?string $date): ?DateTime
    {
        if (empty($date)) {
            return null;
        }

        try {
            return new DateTime($date);
        } catch (\Exception $e) {
            return null;
        }
    }

    private function mapJobType(?string $type): ?string
    {
        if (empty($type)) {
            return null;
        }

        return match (strtolower($type)) {
            'permanent', 'full_time' => 'full-time',
            'part_time' => 'part-time',
            'contract' => 'contract',
            'temporary' => 'temporary',
            default => 'full-time',
        };
    }
}