<?php

namespace Illuminate\Queue\Failed;

use DateTimeInterface;
use Illuminate\Database\ConnectionResolverInterface;
use Illuminate\Support\Facades\Date;

class DatabaseFailedJobProvider implements FailedJobProviderInterface, PrunableFailedJobProvider
{
    /**
     * The connection resolver implementation.
     *
     * @var \Illuminate\Database\ConnectionResolverInterface
     */
    protected $resolver;

    /**
     * The database connection name.
     *
     * @var string
     */
    protected $database;

    /**
     * The database table.
     *
     * @var string
     */
    protected $table;

    /**
     * Create a new database failed job provider.
     *
     * @param  \Illuminate\Database\ConnectionResolverInterface  $resolver
     * @param  string  $database
     * @param  string  $table
     * @return void
     */
    public function __construct(ConnectionResolverInterface $resolver, $database, $table)
    {
        $this->table = $table;
        $this->resolver = $resolver;
        $this->database = $database;
    }

    /**
     * Log a failed job into storage.
     *
     * @param  string  $connection
     * @param  string  $queue
     * @param  string  $payload
     * @param  \Throwable  $exception
     * @return int|null
     */
    public function log($connection, $queue, $payload, $exception)
    {
        $failed_at = Date::now();

        $exception = (string) mb_convert_encoding($exception, 'UTF-8');

        return $this->getTable()->insertGetId(compact(
            'connection', 'queue', 'payload', 'exception', 'failed_at'
        ));
    }

    /**
     * Get a list of all of the failed jobs.
     *
     * @return array
     */
    public function all()
    {
        return $this->getTable()->orderBy('id', 'desc')->get()->all();
    }

    /**
     * Get a single failed job.
     *
     * @param  mixed  $id
     * @return object|null
     */
    public function find($id)
    {
        return $this->getTable()->find($id);
    }

    /**
     * Delete a single failed job from storage.
     *
     * @param  mixed  $id
     * @return bool
     */
    public function forget($id)
    {
        return $this->getTable()->where('id', $id)->delete() > 0;
    }

    /**
     * Flush all of the failed jobs from storage.
     *
     * @param  int|null  $hours
     * @return void
     */
    public function flush($hours = null)
    {
        $this->getTable()->when($hours, function ($query, $hours) {
            $query->where('failed_at', '<=', Date::now()->subHours($hours));
        })->delete();
    }

    /**
     * Prune all of the entries older than the given date.
     *
     * @param  \DateTimeInterface  $before
     * @return int
     */
    public function prune(DateTimeInterface $before)
    {
        $query = $this->getTable()->where('failed_at', '<', $before);

        $totalDeleted = 0;

        do {
            $deleted = $query->take(1000)->delete();

            $totalDeleted += $deleted;
        } while ($deleted !== 0);

        return $totalDeleted;
    }

    /**
     * Get a new query builder instance for the table.
     *
     * @return \Illuminate\Database\Query\Builder
     */
    protected function getTable()
    {
        return $this->resolver->connection($this->database)->table($this->table);
    }
}