/**
 * Add Custom Lottery Prize
 * @since 1.0
 */
add_filter( 'mycred_lotto_winners_get', 'mycred_pro_add_custom_lottery_prize' );
function mycred_pro_add_custom_lottery_prize( $prizes ) {

	$prizes['ingame'] = 'In-game item';
	return $prizes;

}

/**
 * Add Custom Lottery Prize Settings
 * @since 1.0
 */
add_action( 'mycred_lotto_winnings_ingame', 'mycred_pro_add_custom_lottery_prize_settings', 10, 2 );
function mycred_pro_add_custom_lottery_prize_settings( $i, $lottery ) {

	$winnings = $lottery->get_winnings_prefs();
	if ( isset( $winnings['draw'][ $i ] ) )
		$value = $winnings['draw'][ $i ];
	else
		$value = '';

	echo '<td><input type="text" name="mycred_lotto[winnings][draw][' . $i . ']" id="mycred-lotto-win-draw-' . $i . '" value="' . $value . '" class="long" /></td>';

}

/**
 * Handle Custom Lottery Prize Win
 * @version 1.0
 */
add_action( 'mycred_lotto_give_ingame', 'mycred_pro_custom_lottery_prize_payout', 10, 3 );
function mycred_pro_custom_lottery_prize_payout( $product_winners, $winning_user_ids, $lottery ) {

	// Get the "Winnings" settings for this lottery
	$winnings = $lottery->get_winnings_prefs();

	// Get the "Templates" settings for this ltotery
	$templates = $lottery->get_templates_prefs();

	$admin_email = '';

	// Lets loop through our winners
	foreach ( $winning_user_ids as $pick => $user_id ) {

		// IF you do not want a drawn winner to get anything make sure the field is empty
		if ( $winnings['draw'][ $pick ] == '' ) continue;

		// The prize should be saved in the draw field
		$prize = sanitize_text_field( $winnings['draw'][ $pick ] );

		// Make sure the winning user still exists
		$winning_user = get_userdata( absint( $user_id ) );
		if ( isset( $winning_user->ID ) ) {

			// Replace %prize% template tag with the actual prize
			$template = str_replace( '%prize%', $prize, $templates['win'] );

			// Send Email
			wp_mail( $winning_user->user_email, 'Lottery Win!', $template );

			$admin_email .= sprintf( 'User: %s won: %s', $winning_user->display_name, $prize ) . "\n";

		}

	}

	// Finally, lets send an email to the admin to let him know that winners have been drawn
	$message = sprintf(
		'The following users has been selected winners: %s.',
		$admin_email
	);

	wp_mail( get_option( 'admin_email' ), 'In-Game Lottery Win!', $message );

}