<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;
use Illuminate\Support\Str;
use RuntimeException;

class Parcel2Go
{
    public function __construct(private IntegrationSettings $settings) {}

    public function fetch(string $path): array
    {
        return Http::withToken($this->accessToken())->acceptJson()->connectTimeout(3)->timeout(15)
            ->get($this->url($path))->throw()->json() ?? [];
    }

    public function quote(array $details): array
    {
        return Http::withToken($this->accessToken())->acceptJson()->connectTimeout(3)->timeout(15)
            ->post($this->url('quotes'), [
                'CollectionAddress' => ['Country' => 'GBR', 'Postcode' => $details['collection_postcode']],
                'DeliveryAddress' => ['Country' => 'GBR', 'Postcode' => $details['delivery_postcode']],
                'Parcels' => [[
                    'Value' => $details['value'], 'Weight' => $details['weight'],
                    'Length' => $details['length'], 'Width' => $details['width'], 'Height' => $details['height'],
                ]],
            ])->throw()->json() ?? [];
    }

    public function collectionDates(string $service, string $street, string $town, string $postcode): array
    {
        return Http::withToken($this->accessToken())->acceptJson()->connectTimeout(3)->timeout(15)
            ->post($this->url('collectiondates'), [
                'ServiceSlug' => $service, 'Address' => $street, 'City' => $town,
                'Postcode' => $postcode, 'CountryISO3Code' => 'GBR',
            ])->throw()->json() ?? [];
    }

    public function bookCollection(array $details, string $service, array $booking): array
    {
        $collectionAddress = [
            'ContactName' => $booking['sender_name'], 'Email' => $booking['sender_email'],
            'Phone' => $booking['sender_phone'], 'Property' => $booking['sender_property'],
            'Street' => $booking['sender_street'], 'Town' => $booking['sender_town'],
            'Postcode' => $details['collection_postcode'], 'CountryIsoCode' => 'GBR',
        ];
        $deliveryAddress = [
            'ContactName' => $booking['recipient_name'], 'Email' => $booking['recipient_email'],
            'Phone' => $booking['recipient_phone'], 'Property' => $booking['recipient_property'],
            'Street' => $booking['recipient_street'], 'Town' => $booking['recipient_town'],
            'Postcode' => $details['delivery_postcode'], 'CountryIsoCode' => 'GBR',
        ];
        [$forename, $surname] = array_pad(explode(' ', trim($booking['sender_name']), 2), 2, '');

        return Http::withToken($this->accessToken())->acceptJson()->connectTimeout(3)->timeout(20)
            ->post($this->url('orders'), [
                'Items' => [[
                    'Id' => (string) Str::uuid(),
                    'CollectionDate' => $booking['collection_date'],
                    'OriginCountry' => 'GBR', 'Service' => $service,
                    'CollectionAddress' => $collectionAddress,
                    'Parcels' => [[
                        'Id' => (string) Str::uuid(),
                        'Height' => $details['height'], 'Length' => $details['length'],
                        'Width' => $details['width'], 'Weight' => $details['weight'],
                        'EstimatedValue' => $details['value'],
                        'ContentsSummary' => $booking['contents'],
                        'DeliveryAddress' => $deliveryAddress,
                    ]],
                ]],
                'CustomerDetails' => ['Email' => $booking['sender_email'], 'Forename' => $forename, 'Surname' => $surname ?: $forename],
            ])->throw()->json() ?? [];
    }

    public function labelPdf(string $reference, string $hash): string
    {
        $data = Http::withToken($this->accessToken())->acceptJson()->connectTimeout(3)->timeout(20)
            ->get($this->url('labels/'.$reference), [
                'referenceType' => 'OrderLineId', 'detailLevel' => 'Labels',
                'labelMedia' => 'A4', 'labelFormat' => 'PDF', 'hash' => $hash,
            ])->throw()->json();
        $encoded = $data['Base64EncodedLabels'][0] ?? '';
        $pdf = is_string($encoded) ? base64_decode($encoded, true) : false;
        if ($pdf === false || ! str_starts_with($pdf, '%PDF-')) {
            throw new RuntimeException('Parcel2Go did not return a valid PDF label.');
        }

        return $pdf;
    }

    private function url(string $path): string
    {
        return rtrim($this->settings->for('parcel2go')['base_url'], '/').'/'.ltrim($path, '/');
    }

    private function accessToken(): string
    {
        $settings = $this->settings->for('parcel2go');
        if (! $settings['client_id'] || ! $settings['client_secret'] || ! $settings['auth_url']) {
            throw new RuntimeException('Parcel2Go credentials are not configured.');
        }

        $token = Http::asForm()->timeout(10)->post($settings['auth_url'], [
            'grant_type' => 'client_credentials',
            'scope' => 'public-api my-profile',
            'client_id' => $settings['client_id'],
            'client_secret' => $settings['client_secret'],
        ])->throw()->json('access_token');

        if (! $token) {
            throw new RuntimeException('Parcel2Go did not return an access token.');
        }

        return $token;
    }
}