<?php

namespace App\Services;

use App\Models\UserDomainBlock;
use App\Profile;
use App\Status;
use App\Transformer\Api\AccountTransformer;
use App\User;
use App\UserSetting;
use Cache;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;
use League\Fractal;
use League\Fractal\Serializer\ArraySerializer;
use NumberFormatter;

class AccountService
{
    const CACHE_KEY = 'pf:services:account:';

    const CACHE_PF_ACCT_SETTINGS_KEY = 'pf:services:account-settings:';

    public static function get($id, $softFail = false)
    {
        $res = Cache::remember(self::CACHE_KEY.$id, 43200, function () use ($id) {
            $fractal = new Fractal\Manager;
            $fractal->setSerializer(new ArraySerializer);
            $profile = Profile::find($id);
            if (! $profile || $profile->status === 'delete') {
                return null;
            }
            $resource = new Fractal\Resource\Item($profile, new AccountTransformer);

            return $fractal->createData($resource)->toArray();
        });

        if (! $res) {
            return $softFail ? null : abort(404);
        }

        return $res;
    }

    public static function getMastodon($id, $softFail = false)
    {
        $account = self::get($id, $softFail);
        if (! $account) {
            return null;
        }

        if (config('exp.emc') == false) {
            return $account;
        }

        unset(
            $account['header_bg'],
            $account['is_admin'],
            $account['last_fetched_at'],
            $account['local'],
            $account['location'],
            $account['note_text'],
            $account['pronouns'],
            $account['website']
        );

        $account['avatar_static'] = $account['avatar'];
        $account['bot'] = false;
        $account['emojis'] = [];
        $account['fields'] = [];
        $account['header'] = url('/storage/headers/missing.png');
        $account['header_static'] = url('/storage/headers/missing.png');
        $account['last_status_at'] = null;

        return $account;
    }

    public static function del($id)
    {
        Cache::forget('pf:activitypub:user-object:by-id:'.$id);

        return Cache::forget(self::CACHE_KEY.$id);
    }

    public static function settings($id)
    {
        return Cache::remember('profile:compose:settings:'.$id, 604800, function () use ($id) {
            $settings = UserSetting::whereUserId($id)->first();
            if (! $settings) {
                return self::defaultSettings();
            }

            return collect($settings)
                ->filter(function ($item, $key) {
                    return in_array($key, array_keys(self::defaultSettings())) == true;
                })
                ->map(function ($item, $key) {
                    if ($key == 'compose_settings') {
                        $cs = self::defaultSettings()['compose_settings'];
                        $ms = is_array($item) ? $item : [];

                        return array_merge($cs, $ms);
                    }

                    if ($key == 'other') {
                        $other = self::defaultSettings()['other'];
                        $mo = is_array($item) ? $item : [];

                        return array_merge($other, $mo);
                    }

                    return $item;
                });
        });
    }

    public static function getAccountSettings($pid)
    {
        $key = self::CACHE_PF_ACCT_SETTINGS_KEY.$pid;

        return Cache::remember($key, 14400, function () use ($pid) {
            $user = User::with('profile')->whereProfileId($pid)->whereNull('status')->first();
            if (! $user) {
                return [];
            }

            $settings = $user->settings;
            $other = array_merge(self::defaultSettings()['other'], $settings->other ?? []);

            return [
                'reduce_motion' => (bool) $settings->reduce_motion,
                'high_contrast_mode' => (bool) $settings->high_contrast_mode,
                'video_autoplay' => (bool) $settings->video_autoplay,
                'media_descriptions' => (bool) $settings->media_descriptions,
                'crawlable' => (bool) $settings->crawlable,
                'show_profile_follower_count' => (bool) $settings->show_profile_follower_count,
                'show_profile_following_count' => (bool) $settings->show_profile_following_count,
                'public_dm' => (bool) $settings->public_dm,
                'disable_embeds' => (bool) $other['disable_embeds'],
                'show_atom' => (bool) $settings->show_atom,
                'is_suggestable' => (bool) $user->profile->is_suggestable,
                'indexable' => (bool) $user->profile->indexable,
            ];
        });
    }

    public static function forgetAccountSettings($pid)
    {
        return Cache::forget(self::CACHE_PF_ACCT_SETTINGS_KEY.$pid);
    }

    public static function canEmbed($id)
    {
        $res = self::getAccountSettings($id);
        if (! $res || ! isset($res['disable_embeds'])) {
            return false;
        }

        return ! $res['disable_embeds'];
    }

    public static function defaultSettings()
    {
        return [
            'crawlable' => true,
            'public_dm' => false,
            'reduce_motion' => false,
            'high_contrast_mode' => false,
            'video_autoplay' => false,
            'show_profile_follower_count' => true,
            'show_profile_following_count' => true,
            'compose_settings' => [
                'default_scope' => 'public',
                'default_license' => 1,
                'media_descriptions' => false,
            ],
            'other' => [
                'advanced_atom' => false,
                'disable_embeds' => false,
                'mutual_mention_notifications' => false,
                'hide_collections' => false,
                'hide_like_counts' => false,
                'hide_groups' => false,
                'hide_stories' => false,
                'disable_cw' => false,
            ],
        ];
    }

    public static function syncPostCount($id)
    {
        $profile = Profile::find($id);

        if (! $profile) {
            return false;
        }

        $key = self::CACHE_KEY.'pcs:'.$id;

        if (Cache::has($key)) {
            return;
        }

        $count = Status::whereProfileId($id)
            ->whereNull(['in_reply_to_id', 'reblog_of_id'])
            ->whereIn('scope', ['public', 'unlisted', 'private'])
            ->count();

        $profile->status_count = $count;
        $profile->save();

        Cache::put($key, 1, 259200);

        return true;
    }

    public static function usernameToId($username)
    {
        $key = self::CACHE_KEY.'u2id:'.hash('sha256', $username);

        return Cache::remember($key, 14400, function () use ($username) {
            $s = Str::of($username);
            if ($s->contains('@') && ! $s->startsWith('@')) {
                $username = "@{$username}";
            }
            $profile = DB::table('profiles')
                ->whereUsername($username)
                ->first();
            if (! $profile) {
                return null;
            }

            return (string) $profile->id;
        });
    }

    public static function hiddenFollowers($id)
    {
        $account = self::get($id, true);
        if (! $account || ! isset($account['local']) || $account['local'] == false) {
            return false;
        }

        return Cache::remember('pf:acct:settings:hidden-followers:'.$id, 43200, function () use ($id) {
            $user = User::whereProfileId($id)->first();
            if (! $user) {
                return false;
            }
            $settings = UserSetting::whereUserId($user->id)->first();
            if ($settings) {
                return $settings->show_profile_follower_count == false;
            }

            return false;
        });
    }

    public static function hiddenFollowing($id)
    {
        $account = self::get($id, true);
        if (! $account || ! isset($account['local']) || $account['local'] == false) {
            return false;
        }

        return Cache::remember('pf:acct:settings:hidden-following:'.$id, 43200, function () use ($id) {
            $user = User::whereProfileId($id)->first();
            if (! $user) {
                return false;
            }
            $settings = UserSetting::whereUserId($user->id)->first();
            if ($settings) {
                return $settings->show_profile_following_count == false;
            }

            return false;
        });
    }

    public static function setLastActive($id = false)
    {
        if (! $id) {
            return;
        }
        $key = 'user:last_active_at:id:'.$id;
        if (! Cache::has($key)) {
            $user = User::find($id);
            if (! $user) {
                return;
            }
            $user->last_active_at = now();
            $user->save();
            Cache::put($key, 1, 14400);
        }
    }

    public static function blocksDomain($pid, $domain = false)
    {
        if (! $domain) {
            return;
        }

        return UserDomainBlock::whereProfileId($pid)->whereDomain($domain)->exists();
    }

    public static function formatNumber($num)
    {
        if (! $num || $num < 1) {
            return '0';
        }
        $num = intval($num);
        $formatter = new NumberFormatter('en_US', NumberFormatter::DECIMAL);
        $formatter->setAttribute(NumberFormatter::MAX_FRACTION_DIGITS, 1);

        if ($num >= 1000000000) {
            return $formatter->format($num / 1000000000).'B';
        } elseif ($num >= 1000000) {
            return $formatter->format($num / 1000000).'M';
        } elseif ($num >= 1000) {
            return $formatter->format($num / 1000).'K';
        } else {
            return $formatter->format($num);
        }
    }

    public static function getMetaDescription($id)
    {
        $account = self::get($id, true);

        if (! $account) {
            return '';
        }

        $posts = self::formatNumber($account['statuses_count']).' Posts, ';
        $following = self::formatNumber($account['following_count']).' Following, ';
        $followers = self::formatNumber($account['followers_count']).' Followers';
        $note = $account['note'] && strlen($account['note']) ?
            ' · '.\Purify::clean(strip_tags(str_replace("\n", '', str_replace("\r", '', $account['note'])))) :
            '';

        return $posts.$following.$followers.$note;
    }
}