<?php
/** Bounded flat repeating answers; no pricing, consent or conditional dependencies. */
if ( ! defined( 'ABSPATH' ) ) { exit; }
final class KCONV_Repeaters {
    public static function boot() {
        add_filter( 'kconv_allowed_field_types', function( $types ) { $types[] = 'repeater'; return $types; } );
        add_filter( 'kconv_sanitize_field', array( __CLASS__, 'sanitize' ), 40, 2 );
        add_filter( 'kconv_sanitize_schema', array( __CLASS__, 'schema' ), 999, 2 );
        add_filter( 'kconv_validate_field_value', array( __CLASS__, 'validate' ), 10, 3 );
        add_filter( 'kconv_render_field', array( __CLASS__, 'render' ), 5, 4 );
        add_action( 'kconv_form_rendered', array( __CLASS__, 'assets' ) );
        add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_assets' ) );
    }
    public static function error( $text ) { return new WP_Error( 'repeater', $text ); }
    public static function has( $form ) { return in_array( 'repeater', array_column( $form['fields'], 'type' ), true ); }
    public static function sanitize( $clean, $raw ) {
        if ( is_wp_error( $clean ) || 'repeater' !== $clean['type'] ) { return $clean; }
        $r = isset( $raw['repeater'] ) ? $raw['repeater'] : null;
        if ( ! is_array( $r ) || ! isset( $r['min'], $r['max'], $r['fields'] ) || ! is_int( $r['min'] ) || ! is_int( $r['max'] ) || $r['min'] < 0 || $r['max'] < max( 1, $r['min'] ) || $r['max'] > 10 || ! is_array( $r['fields'] ) || ! count( $r['fields'] ) || count( $r['fields'] ) > 6 || isset( $raw['condition'] ) ) { return self::error( __( 'A repeatable group needs 1–6 simple questions and 0–10 rows, with a maximum of at least one. Group conditions are unsupported.', 'killerconversions' ) ); }
        foreach ( $r['fields'] as $child ) {
            if ( ! is_array( $child ) || ! isset( $child['type'] ) || ! in_array( $child['type'], array( 'text', 'email', 'number', 'date', 'select' ), true ) || array_intersect( array_keys( $child ), array( 'repeater', 'condition', 'calculation', 'consent' ) ) ) { return self::error( __( 'Repeatable questions support text, email, number, date and dropdown only. Nested groups, consent, files and conditions are unsupported.', 'killerconversions' ) ); }
        }
        $children = KCONV_Core::sanitize_schema( array( 'fields' => $r['fields'] ) );
        if ( is_wp_error( $children ) ) { return $children; }
        $clean['required'] = false; $clean['width'] = 'full'; $clean['repeater'] = array( 'min' => $r['min'], 'max' => $r['max'], 'fields' => $children['fields'] );
        // Dropdown consent is deliberately unsupported in groups; these are ordinary answers.
        foreach ( $clean['repeater']['fields'] as &$child ) { unset( $child['consent'] ); } unset( $child );
        return $clean;
    }
    private static function references( $value, $ids ) {
        if ( ! is_array( $value ) ) { return false; }
        foreach ( $value as $key => $part ) {
            if ( in_array( $key, array( 'source', 'field' ), true ) && is_string( $part ) && in_array( $part, $ids, true ) ) { return true; }
            if ( is_array( $part ) && self::references( $part, $ids ) ) { return true; }
        }
        return false;
    }
    public static function schema( $schema, $raw ) {
        if ( is_wp_error( $schema ) ) { return $schema; }
        $ids = array(); foreach ( $schema['fields'] as $field ) { if ( 'repeater' === $field['type'] ) { $ids[] = $field['id']; } }
        if ( count( $ids ) > 3 ) { return self::error( __( 'Use at most three repeatable groups per form.', 'killerconversions' ) ); }
        foreach ( $schema['fields'] as $field ) {
            if ( ! empty( $field['condition'] ) && self::references( $field['condition'], $ids ) ) { return self::error( __( 'Repeatable groups cannot control conditional questions.', 'killerconversions' ) ); }
            if ( ! empty( $field['calculation'] ) ) { foreach ( $ids as $id ) { if ( preg_match( '/\b' . preg_quote( $id, '/' ) . '\b/', wp_json_encode( $field['calculation'] ) ) ) { return self::error( __( 'Repeatable groups cannot be used in calculations.', 'killerconversions' ) ); } } }
        }
        if ( $ids && ! empty( $raw['logic']['branches'] ) ) { return self::error( __( 'Repeatable groups currently require a linear step flow without branching.', 'killerconversions' ) ); }
        foreach ( array( 'estimate', 'logic' ) as $key ) { if ( ! empty( $raw[ $key ] ) && self::references( $raw[ $key ], $ids ) ) { return self::error( __( 'Repeatable groups cannot be pricing or advanced-logic dependencies.', 'killerconversions' ) ); } }
        return $schema;
    }
    public static function is_value( $value ) {
        if ( ! is_array( $value ) || ! isset( $value['count'], $value['rows'], $value['labels'] ) || ! is_int( $value['count'] ) || $value['count'] < 0 || $value['count'] > 10 || ! is_array( $value['rows'] ) || ! is_array( $value['labels'] ) || count( $value['rows'] ) !== $value['count'] || ! count( $value['labels'] ) || count( $value['labels'] ) > 6 || ( $value['count'] && array_keys( $value['rows'] ) !== range( 0, $value['count'] - 1 ) ) ) { return false; }
        foreach ( $value['labels'] as $id => $label ) { if ( ! is_string( $id ) || ! preg_match( '/^[a-z][a-z0-9_]{0,39}$/D', $id ) || ! is_string( $label ) || ! strlen( $label ) || KCONV_Field_Rules::length( $label ) > 200 ) { return false; } }
        foreach ( $value['rows'] as $row ) { if ( ! is_array( $row ) || count( $row ) !== count( $value['labels'] ) || array_diff( array_keys( $row ), array_keys( $value['labels'] ) ) ) { return false; } foreach ( $row as $answer ) { if ( ! is_string( $answer ) || KCONV_Field_Rules::length( $answer ) > 1000 ) { return false; } } }
        return true;
    }
    public static function validate( $previous, $field, $value ) {
        if ( 'repeater' !== $field['type'] ) { return $previous; }
        $r = $field['repeater']; $partial = ! empty( $field['_kconv_partial'] );
        if ( ! is_array( $value ) || array_diff( array_keys( $value ), array( 'count', 'rows', 'labels' ) ) || ! isset( $value['count'], $value['rows'] ) || ! is_int( $value['count'] ) || ! preg_match( '/^(?:0|[1-9][0-9]?)$/D', (string) $value['count'] ) || ! is_array( $value['rows'] ) ) { return self::error( __( 'The repeatable group is incomplete. Reload and enter its answers again.', 'killerconversions' ) ); }
        $count = (int) $value['count']; $rows = $value['rows'];
        if ( $count > $r['max'] || ( ! $partial && $count < $r['min'] ) || count( $rows ) !== $count || ( $count && array_keys( $rows ) !== range( 0, $count - 1 ) ) ) {
            /* translators: 1: minimum rows, 2: maximum rows. */
            return self::error( sprintf( __( 'Use %1$d–%2$d complete rows in this group.', 'killerconversions' ), $partial ? 0 : $r['min'], $r['max'] ) ); }
        $clean = array(); $keys = array_column( $r['fields'], 'id' ); $labels = array_column( $r['fields'], 'label', 'id' );
        foreach ( $rows as $i => $row ) {
            if ( ! is_array( $row ) || count( $row ) !== count( $keys ) || array_diff( array_keys( $row ), $keys ) || array_diff( $keys, array_keys( $row ) ) ) { return self::error( __( 'A repeatable row is incomplete or contains unknown questions. Reload before submitting.', 'killerconversions' ) ); }
            $children = $r['fields']; if ( $partial ) { foreach ( $children as &$child ) { $child['required'] = false; } unset( $child ); }
            list( $answers, $errors ) = KCONV_Core::validate_values( $children, $row );
            if ( $errors ) { $key = key( $errors );
                /* translators: 1: row number, 2: question label, 3: validation error. */
                return self::error( sprintf( __( 'Row %1$d, %2$s: %3$s', 'killerconversions' ), $i + 1, $labels[ $key ], $errors[ $key ] ) ); }
            $clean[] = $answers;
        }
        return array( 'value' => array( 'count' => $count, 'rows' => $clean, 'labels' => $labels ) );
    }
    public static function text( $value ) {
        if ( ! self::is_value( $value ) ) { return ''; }
        $lines = array(); foreach ( $value['rows'] as $i => $row ) {
            /* translators: Sequential row number in a repeatable group. */
            $lines[] = sprintf( __( 'Row %d', 'killerconversions' ), $i + 1 ); foreach ( $row as $key => $answer ) { $label = isset( $value['labels'][ $key ] ) && is_string( $value['labels'][ $key ] ) ? $value['labels'][ $key ] : $key; $lines[] = $label . ': ' . ( is_scalar( $answer ) ? (string) $answer : '' ); } } return implode( "\n", $lines );
    }
    public static function emails( $values, $fields ) { $emails = array(); foreach ( $fields as $field ) { if ( 'repeater' !== $field['type'] || ! isset( $values[ $field['id'] ] ) || ! self::is_value( $values[ $field['id'] ] ) ) { continue; } foreach ( $field['repeater']['fields'] as $child ) { if ( 'email' !== $child['type'] ) { continue; } foreach ( $values[ $field['id'] ]['rows'] as $row ) { if ( ! empty( $row[ $child['id'] ] ) && is_email( $row[ $child['id'] ] ) ) { $emails[] = strtolower( $row[ $child['id'] ] ); } } } } return array_unique( $emails ); }
    public static function render( $html, $field, $form, $instance ) {
        if ( 'repeater' !== $field['type'] ) { return $html; }
        $id = $instance . '-' . $field['id'];
        return '<div class="kconv-field kconv-repeater" data-kconv-field="' . esc_attr( $field['id'] ) . '" data-kconv-repeater="' . esc_attr( $field['id'] ) . '"><fieldset><legend>' . esc_html( $field['label'] ) . '</legend><p class="kconv-help" id="' . esc_attr( $id . '-help' ) . '">' . esc_html( $field['help'] ) . '</p><div data-kconv-repeater-rows></div><button type="button" data-kconv-repeater-add hidden>' . esc_html__( 'Add row', 'killerconversions' ) . '</button><p role="status" aria-live="polite" data-kconv-repeater-status></p><span class="kconv-error" id="' . esc_attr( $id . '-error' ) . '"></span><noscript><p>' . esc_html__( 'Repeatable groups need JavaScript. Enable it before completing this form; an incomplete group cannot be submitted.', 'killerconversions' ) . '</p></noscript></fieldset></div>';
    }
    public static function assets( $form ) { if ( self::has( $form ) ) { wp_enqueue_script( 'kconv-repeaters', KCONV_URL . 'assets/repeaters.js', array( 'kconv-forms', 'wp-i18n' ), KCONV_VERSION, true ); wp_set_script_translations( 'kconv-repeaters', 'killerconversions', KCONV_DIR . 'languages' ); wp_enqueue_style( 'kconv-repeaters', KCONV_URL . 'assets/repeaters.css', array( 'kconv-forms' ), KCONV_VERSION ); } }
    public static function admin_assets() { if ( KCONV_Admin_Scope::plugin( array( 'killerconversions' ) ) ) { wp_enqueue_script( 'kconv-repeaters-admin', KCONV_URL . 'assets/repeaters-admin.js', array( 'kconv-admin', 'wp-i18n' ), KCONV_VERSION, true ); wp_set_script_translations( 'kconv-repeaters-admin', 'killerconversions', KCONV_DIR . 'languages' ); wp_enqueue_style( 'kconv-repeaters-admin', KCONV_URL . 'assets/repeaters.css', array( 'kconv-workspace' ), KCONV_VERSION ); } }
}