<?php if ( ! defined( 'ABSPATH' ) ) exit;

/**
 * Class NF_Fields_Product
 */
class NF_Fields_Product extends NF_Abstracts_Input
{
    protected $_name = 'product';

    protected $_section = 'pricing';

    protected $_icon = 'tag';

    protected $_aliases = array();

    protected $_type = 'product';

    protected $_templates = array( 'product', 'textbox', 'hidden', 'listselect' );

    protected $_test_value = '0';

    protected $processing_fields = array( 'quantity', 'modifier', 'shipping', 'tax', 'total' );

    protected $_settings = array( 'product_use_quantity', 'product_price', 'product_type', 'product_type' );

    protected $_settings_exclude = array( 'input_limit_set' );

    public function __construct()
    {
        parent::__construct();

        $this->_nicename = __( 'Product', 'ninja-forms' );

        $this->_settings[ 'product_price' ][ 'width' ] = 'full';
        $this->_settings[ 'required' ][ 'deps' ][ 'product_use_quantity' ] = 1;

        add_filter( 'ninja_forms_merge_tag_value_product', array( $this, 'merge_tag_value' ), 10, 2 );

        add_filter( 'ninja_forms_localize_field_' . $this->_name, array( $this, 'filter_required_setting' ) );
        add_filter( 'ninja_forms_localize_field_' . $this->_name . '_preview', array( $this, 'filter_required_setting_preview' ) );
    }

    public function process( $product, $data )
    {
        $related = array();

        foreach( $data[ 'fields' ] as $key => $field ){

            if( ! in_array( $field[ 'type' ], $this->processing_fields ) ) continue;

            $type = $field[ 'type' ];

            if( ! isset( $field[ 'product_assignment' ] ) ) continue;

            if( $product[ 'id' ] != $field[ 'product_assignment' ] ) continue;

            $related[ $type ] = &$data[ 'fields' ][ $key ]; // Assign by reference
        }

        $total = floatval( $product[ 'product_price' ] );

        if( isset( $related[ 'quantity' ][ 'value' ] ) && $related[ 'quantity' ][ 'value' ] ){
            $total = $total * $related[ 'quantity' ][ 'value' ];
        } elseif( $product[ 'product_use_quantity'] && $product[ 'value' ] ){
            $total = $total * $product[ 'value' ];
        }

        if( isset( $related[ 'modifier' ] ) ){
            //TODO: Handle multiple modifiers.
        }

        $data[ 'product_totals' ][] = number_format( $total, 2 );

        return $data;
    }

    /**
     * Validate
     *
     * @param $field
     * @param $data
     * @return array $errors
     */
    public function validate( $field, $data )
    {
        $errors = array();

        if( isset( $field[ 'product_use_quantity' ] ) && 1 == $field[ 'product_use_quantity' ] ){

            // Required check.
            if( isset( $field['required'] ) && 1 == $field['required'] && ! trim( $field['value'] ) ){
                $errors[] = 'Field is required.';
            }
        }

        return $errors;
    }

    public function filter_required_setting( $field )
    {
        if( 0 == $field->get_setting( 'product_use_quantity', 0 ) ) {
            $field->update_setting('required', 0);
        }
        return $field;
    }

    public function filter_required_setting_preview( $field )
    {
        if( ! isset( $field[ 'settings' ][ 'product_use_quantity' ] ) || 1 != $field[ 'settings' ][ 'product_use_quantity' ] ) {
            $field[ 'settings' ][ 'required' ] = 0;
        }
        return $field;
    }

    public function merge_tag_value( $value, $field )
    {
        $product_price = ( isset( $field[ 'product_price' ] ) ) ? str_replace( '$', '', $field[ 'product_price' ] ) : 0;
        $product_quantity = ( isset( $field[ 'product_use_quantity' ] ) && 1 == $field[ 'product_use_quantity' ] ) ? $value : 1;

        // TODO: Extract a higher level currency formatting based on settings.
        return '$' . number_format( $product_price * $product_quantity, 2 );
    }
}