<?php

namespace App\Services;

use App\Models\Location;
use App\Repositories\LocationRepository;
use App\Models\Source;
use Ramsey\Uuid\Uuid;
use Carbon\Carbon;
use GuzzleHttp\Exception\ConnectException;

class UpdateService
{
    private $limit = 15;
    protected $model;
    protected $locationRepository;

    public function __construct(LocationRepository $locationRepository)
    {
        $this->locationRepository = $locationRepository;
    }

    public function data()
    {
        $sources = Source::where("active", true)->get();
        $missing = [];
        $checked = [];
        //checks source url to make sure they valid
        foreach ($sources as $source) {
            $result = [];
            if ($source['type'] == 'mastodon') {
                if ($source['token'] == null) {
                    try {
                        $result = \Mastodon::domain('https://' . $source['url'])
                            ->get('/instance/domain_blocks');
                        array_push($checked, ['source' => $source->url]);
                    } catch (ConnectException $e) {
                        array_push($missing, ['source' => $source->url]);
                    }
                } else {
                    try {
                        $result = \Mastodon::domain('https://' . $source['url'])
                            ->token($source['token'])
                            ->get('/instance/domain_blocks');
                        array_push($checked, ['source' => $source->url]);
                    } catch (ConnectException $e) {
                    }
                }
            } elseif ($source['type'] == 'custom' && $source['format'] == 'csv') {
                try {
                    $denylist = array_map('str_getcsv', file('https://' . $source['url']));
                    foreach ($denylist as $item) {
                        array_push($result, [
                            'domain'   => $item[0],
                            'severity' => $item[1],
                            'comment'  => $item[2]]);
                    }
                    array_push($checked, ['source' => $source->url]);
                } catch (Exception $e) {
                    array_push($missing, ['source' => $source->url]);
                }
            }

            $source->list_data    = json_encode($result);
            $source->last_updated = Carbon::now();
            $source->save();
        }
        return count($checked) . ' SOURCES UPDATED - ' . count($missing) . ' SOURCES NOT CHECKED';
    }

    public function list()
    {
        $duplicates = 0;
        $fresh      = 0;
        $unified    = [];

        $sources = Source::where("active", true)->get();

        foreach ($sources as $source) {
            //$listData = json_decode();
            foreach (json_decode($source->list_data) as $item) {
                $index = array_search($item->domain, array_column($unified, 'url'));
                if ($index) {
                    //if there is a match, update the count
                    if ($item->severity == "suspend" || $item->severity == "defederate") {
                        ++$unified[$index]['block_count'];
                        array_push($unified[$index]['block_vote'], $source->url);
                    } else {
                        ++$unified[$index]['silence_count'];
                        array_push($unified[$index]['silence_vote'], $source->url);
                    }
                } else {
                    $silence      = 0;
                    $suspend      = 0;
                    $block_vote   = [];
                    $silence_vote = [];
                    if ($item->severity == "suspend" || $item->severity == "defederate") {
                        ++$suspend;
                        array_push($block_vote, $source->url);
                    } else {
                        ++$silence;
                        array_push($silence_vote, $source->url);
                    }
                    array_push($unified, [
                        'name'          => $item->domain,
                        'url'           => $item->domain,
                        'rating'        => $item->severity,
                        'comment'       => $item->comment,
                        'block_count'   => $suspend,
                        'silence_count' => $silence,
                        'block_vote'    => $block_vote,
                        'silence_vote'  => $silence_vote,
                    ]);
                }
            }
        }

        foreach ($unified as $item) {
            $location = $this->locationRepository->getLocation($item['url']);
            if ($location) {
                ++$duplicates;
                //update block count for existing item

                $location->block_count   = $item['block_count'];
                $location->block_vote    = [];
                $location->block_vote    = $item['block_vote'];
                $location->silence_count = $item['silence_count'];
                $location->silence_vote  = [];
                $location->silence_vote  = $item['silence_vote'];

                $location->actions_count = $item['block_count'] + $item['silence_count'];

                if (($item['block_count'] + $item['silence_count']) < 2) {
                    $location->active = false;
                } else {
                    $location->active = true;
                }

                //replace null with empty array
                if ($location->images == null) {
                    $location->images = [];
                };
                $location->save();
            } else {
                // make new entries for instances not present
                ++$fresh;
                $images = [];
                $rating = ($item['rating'] == 'defederate') ? 'suspend' : $item['rating'];

                $status = true;
                if (($item['block_count'] + $item['silence_count']) < 2) {
                    $status = false;
                }

                $new = Location::create([
                    'uuid'          => Uuid::uuid4(),
                    'name'          => $item['url'],
                    'url'           => $item['url'],
                    'description'   => ($item['comment'] != null) ? $item['comment'] : "no description",
                    'active'        => $status,
                    'rating'        => $rating,
                    'added_by'      => 1,
                    'tags'          => 'poor moderation, hate speech',
                    'images'        => json_encode($images),
                    'block_count'   => $item['block_count'],
                    'block_vote'    => $item['block_vote'],
                    'silence_count' => $item['silence_count'],
                    'silence_vote'  => $item['silence_vote'],
                    'actions_cont'  => $item['block_count'] + $item['silence_count']
                ]);
            }
        }
        //TODO: Send update post to TBS social account
        return $duplicates . ' LOCATIONS UPDATED | ' . $fresh . ' NEW LOCATIONS CREATED';
    }

    public function urlExists($url)
    {
        // Remove all illegal characters from a url
        $url = filter_var($url, FILTER_SANITIZE_URL);
        // Validate URI
        if (
            filter_var($url, FILTER_VALIDATE_URL) === false || // check only for http/https schemes.
            !in_array(
                strtolower(parse_url($url, PHP_URL_SCHEME)),
                ["http", "https"],
                true
            )
        ) {
            return false;
        } // Check that URL exists
        $file_headers = @get_headers($url);
        return !(!$file_headers || $file_headers[0] === "HTTP/1.1 404 Not Found");
    }
}