<?php

namespace App\Services;

use App\Models\UserDomainBlock;
use App\UserFilter;
use Cache;
use Illuminate\Support\Facades\Redis;

class UserFilterService
{
    const USER_MUTES_KEY = 'pf:services:mutes:ids:';

    const USER_BLOCKS_KEY = 'pf:services:blocks:ids:';

    const USER_DOMAIN_KEY = 'pf:services:domain-blocks:ids:';

    public static function mutes(int $profile_id)
    {
        $key = self::USER_MUTES_KEY.$profile_id;
        $warm = Cache::has($key.':cached-v0');
        if ($warm) {
            return Redis::zrevrange($key, 0, -1) ?? [];
        } else {
            if (Redis::zrevrange($key, 0, -1)) {
                return Redis::zrevrange($key, 0, -1);
            }
            $ids = UserFilter::whereFilterType('mute')
                ->whereUserId($profile_id)
                ->pluck('filterable_id')
                ->map(function ($id) {
                    $acct = AccountService::get($id, true);
                    if (! $acct) {
                        return false;
                    }

                    return $acct['id'];
                })
                ->filter(function ($res) {
                    return $res;
                })
                ->values()
                ->toArray();
            foreach ($ids as $muted_id) {
                Redis::zadd($key, (int) $muted_id, (int) $muted_id);
            }
            Cache::set($key.':cached-v0', 1, 7776000);

            return $ids;
        }
    }

    public static function blocks(int $profile_id)
    {
        $key = self::USER_BLOCKS_KEY.$profile_id;
        $warm = Cache::has($key.':cached-v0');
        if ($warm) {
            return Redis::zrevrange($key, 0, -1) ?? [];
        } else {
            if (Redis::zrevrange($key, 0, -1)) {
                return Redis::zrevrange($key, 0, -1);
            }
            $ids = UserFilter::whereFilterType('block')
                ->whereUserId($profile_id)
                ->pluck('filterable_id')
                ->map(function ($id) {
                    $acct = AccountService::get($id, true);
                    if (! $acct) {
                        return false;
                    }

                    return $acct['id'];
                })
                ->filter(function ($res) {
                    return $res;
                })
                ->values()
                ->toArray();
            foreach ($ids as $blocked_id) {
                Redis::zadd($key, (int) $blocked_id, (int) $blocked_id);
            }
            Cache::set($key.':cached-v0', 1, 7776000);

            return $ids;
        }
    }

    public static function filters(int $profile_id)
    {
        return array_unique(array_merge(self::mutes($profile_id), self::blocks($profile_id)));
    }

    public static function mute(int $profile_id, int $muted_id)
    {
        if ($profile_id == $muted_id) {
            return false;
        }
        $key = self::USER_MUTES_KEY.$profile_id;
        $mutes = self::mutes($profile_id);
        $exists = in_array($muted_id, $mutes);
        if (! $exists) {
            Redis::zadd($key, $muted_id, $muted_id);
        }

        return true;
    }

    public static function unmute(int $profile_id, string $muted_id)
    {
        if ($profile_id == $muted_id) {
            return false;
        }
        $key = self::USER_MUTES_KEY.$profile_id;
        $mutes = self::mutes($profile_id);
        $exists = in_array($muted_id, $mutes);
        if ($exists) {
            Redis::zrem($key, $muted_id);
        }

        return true;
    }

    public static function block(int $profile_id, int $blocked_id)
    {
        if ($profile_id == $blocked_id) {
            return false;
        }
        $key = self::USER_BLOCKS_KEY.$profile_id;
        $exists = in_array($blocked_id, self::blocks($profile_id));
        if (! $exists) {
            Redis::zadd($key, $blocked_id, $blocked_id);
        }

        return true;
    }

    public static function unblock(int $profile_id, string $blocked_id)
    {
        if ($profile_id == $blocked_id) {
            return false;
        }
        $key = self::USER_BLOCKS_KEY.$profile_id;
        $exists = in_array($blocked_id, self::blocks($profile_id));
        if ($exists) {
            Redis::zrem($key, $blocked_id);
        }

        return $exists;
    }

    public static function blockCount(int $profile_id)
    {
        return Redis::zcard(self::USER_BLOCKS_KEY.$profile_id);
    }

    public static function muteCount(int $profile_id)
    {
        return Redis::zcard(self::USER_MUTES_KEY.$profile_id);
    }

    public static function domainBlocks($pid, $purge = false)
    {
        if ($purge) {
            Cache::forget(self::USER_DOMAIN_KEY.$pid);
        }

        return Cache::remember(
            self::USER_DOMAIN_KEY.$pid,
            21600,
            function () use ($pid) {
                return UserDomainBlock::whereProfileId($pid)->pluck('domain')->toArray();
            });
    }
}
