<?php
declare(strict_types=1);


namespace OneClickFormSync\Mapping;

if (!defined('ABSPATH')) {
    exit;
}

use OneClickFormSync\Forms\DTO\NormalizedSubmission;

/**
 * Maps form fields automatically using labels/IDs as column headers.
 */
class AutomaticFieldMapper implements MappingInterface
{
    /**
     * @var ValueSanitizer
     */
    private ValueSanitizer $sanitizer;

    /**
     * AutomaticFieldMapper constructor.
     *
     * @param ValueSanitizer $sanitizer
     */
    public function __construct(ValueSanitizer $sanitizer)
    {
        $this->sanitizer = $sanitizer;
    }

    /**
     * @inheritDoc
     */
    public function map(NormalizedSubmission $submission, array $mappingSettings): array
    {
        $row = [];

        // 1. Map all form input fields.
        foreach ($submission->getFields() as $field) {
            $header = $field->getLabel() ?: $field->getId();
            // Store as Column Header => Sanitized Value.
            $row[$header] = $this->sanitizer->sanitize($field->getValue());
        }

        // 2. Append selected form metadata as extra columns if enabled.
        $metaMappings = [
            'include_submission_id'   => ['Header' => __('Submission ID', '1-click-form-sync'), 'Value' => $submission->getSubmissionId()],
            'include_submission_date' => ['Header' => __('Date', '1-click-form-sync'), 'Value' => $submission->getSubmissionDate()],
            'include_submission_time' => ['Header' => __('Submission Time', '1-click-form-sync'), 'Value' => $submission->getSubmissionTime()],
            'include_form_id'         => ['Header' => __('Form ID', '1-click-form-sync'), 'Value' => $submission->getFormId()],
            'include_form_name'       => ['Header' => __('Form Name', '1-click-form-sync'), 'Value' => $submission->getFormName()],
            'include_page_url'        => ['Header' => __('Page URL', '1-click-form-sync'), 'Value' => $submission->getPageUrl()],
            'include_utm_source'      => ['Header' => __('UTM Source', '1-click-form-sync'), 'Value' => $submission->getUtmSource()],
            'include_utm_medium'      => ['Header' => __('UTM Medium', '1-click-form-sync'), 'Value' => $submission->getUtmMedium()],
            'include_utm_campaign'    => ['Header' => __('UTM Campaign', '1-click-form-sync'), 'Value' => $submission->getUtmCampaign()],
            'include_utm_term'        => ['Header' => __('UTM Term', '1-click-form-sync'), 'Value' => $submission->getUtmTerm()],
            'include_utm_content'     => ['Header' => __('UTM Content', '1-click-form-sync'), 'Value' => $submission->getUtmContent()],
        ];

        foreach ($metaMappings as $settingKey => $meta) {
            $isDefaultEnabled = in_array($settingKey, ['include_submission_date', 'include_page_url'], true);
            if (isset($mappingSettings[$settingKey])) {
                if (!empty($mappingSettings[$settingKey])) {
                    $row[$meta['Header']] = $this->sanitizer->sanitize($meta['Value']);
                }
            } elseif ($isDefaultEnabled) {
                $row[$meta['Header']] = $this->sanitizer->sanitize($meta['Value']);
            }
        }

        // 3. Append custom query parameters if specified and present in metadata.
        if (!empty($mappingSettings['custom_utm_params'])) {
            $customKeys = array_map('trim', explode(',', $mappingSettings['custom_utm_params']));
            $metadata = $submission->getMetadata();
            foreach ($customKeys as $key) {
                $parts = array_map('trim', explode('|', $key));
                $paramName = $parts[0];

                if (!empty($paramName) && isset($metadata[$paramName])) {
                    if ($metadata[$paramName] !== '') {
                        $overrideValue = isset($parts[1]) && $parts[1] !== '' ? $parts[1] : null;
                        $value = $overrideValue !== null ? $overrideValue : $metadata[$paramName];
                        $row[$paramName] = $this->sanitizer->sanitize($value);
                    }
                }
            }
        }

        return $row;
    }
}