<?php

namespace ImportWP\Common\Exporter\Mapper;

abstract class AbstractMapper
{
    protected $filters;
    protected $record = [];
    public $records = [];

    public function get_value($column, $template_data = null)
    {
        if (is_null($template_data)) {
            $template_data = $this->record();
        }

        $parts = explode('.', $column);
        if (count($parts) == 2) {

            // handle looped data
            if (isset($template_data[$parts[0]], $template_data[$parts[0]][0], $template_data[$parts[0]][0][$parts[1]])) {
                return array_reduce($template_data[$parts[0]], function ($carry, $item) use ($parts) {
                    if (isset($item[$parts[1]])) {
                        $carry[] = $item[$parts[1]];
                    }
                    return $carry;
                }, []);
            }

            // handled grouped data or single
            return isset($template_data[$parts[0]], $template_data[$parts[0]][$parts[1]]) ? $template_data[$parts[0]][$parts[1]] : '';
        }

        return isset($template_data[$column]) ? $template_data[$column] : '';
    }

    public function set_filters($filters = [])
    {
        $this->filters = $filters;
    }

    /**
     * Filter record
     *
     * @param array $post
     * @return boolean
     */
    public function filter()
    {
        $result = false;

        if (empty($this->filters)) {
            return $result;
        }

        foreach ($this->filters as $group) {

            $result = true;

            if (empty($group)) {
                continue;
            }

            foreach ($group as $row) {

                $left = $this->get_value($row['left']);
                $right = $row['right'];
                $right_parts = array_map('trim', explode(',', $right));

                switch ($row['condition']) {
                    case 'equal':
                        if ($left != $right) {
                            $result = false;
                        }
                        break;
                    case 'contains':
                        if (stripos($left, $right) === false) {
                            $result = false;
                        }
                        break;
                    case 'in':
                        if (!in_array($left, $right_parts)) {
                            $result = false;
                        }
                        break;
                    case 'not-equal':
                        if ($left == $right) {
                            $result = false;
                        }
                        break;
                    case 'not-contains':
                        if (stripos($left, $right) !== false) {
                            $result = false;
                        }
                        break;
                    case 'not-in':
                        if (in_array($left, $right_parts)) {
                            $result = false;
                        }
                        break;
                }
            }

            if ($result) {
                return true;
            }
        }


        return $result;
    }

    public function record($index = 0)
    {
        if (isset($this->records[$index])) {
            return $this->records[$index];
        }

        return $this->record;
    }
}