/**
 * Descomplicar® Crescimento Digital
 * https://descomplicar.pt
 */

<?php
defined('BASEPATH') or exit('No direct script access allowed');

/**
 * Customer Data Mapper
 * 
 * Handles the transformation of client/customer data between Perfex CRM and Moloni formats.
 * 
 * @package    DeskMoloni\Libraries\Mappers
 * @version    1.0.0
 * @author     Descomplicar®
 */
class CustomerMapper
{
    private $CI;

    public function __construct()
    {
        $this->CI = &get_instance();
    }

    /**
     * Transform Perfex client data to Moloni format
     *
     * @param array $perfex_client Perfex client data
     * @return array Moloni client data
     */
    public function toMoloni($perfex_client)
    {
        // Basic client information with comprehensive field mappings
        $moloni_data = [
            'name' => $perfex_client['company'] ?: trim($perfex_client['firstname'] . ' ' . $perfex_client['lastname']),
            'email' => $perfex_client['email'],
            'phone' => $perfex_client['phonenumber'],
            'website' => $perfex_client['website'],
            'vat' => $perfex_client['vat'],
            'number' => $perfex_client['vat'] ?: $perfex_client['userid'],
            'notes' => $perfex_client['admin_notes']
        ];

        // Complete address mapping with field validation
        if (!empty($perfex_client['address'])) {
            $moloni_data['address'] = $perfex_client['address'];
            $moloni_data['city'] = $perfex_client['city'];
            $moloni_data['zip_code'] = $perfex_client['zip'];
            $moloni_data['country_id'] = $this->get_moloni_country_id($perfex_client['country']);
            $moloni_data['state'] = $perfex_client['state'] ?? '';
        }

        // Shipping address mapping
        if (!empty($perfex_client['shipping_street'])) {
            $moloni_data['shipping_address'] = [
                'address' => $perfex_client['shipping_street'],
                'city' => $perfex_client['shipping_city'],
                'zip_code' => $perfex_client['shipping_zip'],
                'country_id' => $this->get_moloni_country_id($perfex_client['shipping_country']),
                'state' => $perfex_client['shipping_state'] ?? ''
            ];
        }

        // Contact information mapping
        $moloni_data['contact_info'] = [
            'primary_contact' => trim($perfex_client['firstname'] . ' ' . $perfex_client['lastname']),
            'phone' => $perfex_client['phonenumber'],
            'mobile' => $perfex_client['mobile'] ?? '',
            'fax' => $perfex_client['fax'] ?? '',
            'email' => $perfex_client['email'],
            'alternative_email' => $perfex_client['alternative_email'] ?? ''
        ];

        // Custom fields mapping
        $moloni_data['custom_fields'] = $this->map_custom_fields($perfex_client);

        // Client preferences and settings
        $moloni_data['preferences'] = [
            'language' => $perfex_client['default_language'] ?? 'pt',
            'currency' => $perfex_client['default_currency'] ?? 'EUR',
            'payment_terms' => $perfex_client['payment_terms'] ?? 30,
            'credit_limit' => $perfex_client['credit_limit'] ?? 0
        ];

        // Financial information
        $moloni_data['financial_info'] = [
            'vat_number' => $perfex_client['vat'],
            'tax_exempt' => !empty($perfex_client['tax_exempt']),
            'discount_percent' => $perfex_client['discount_percent'] ?? 0,
            'billing_cycle' => $perfex_client['billing_cycle'] ?? 'monthly'
        ];

        return array_filter($moloni_data, function($value) {
            return $value !== null && $value !== '';
        });
    }

    /**
     * Transform Moloni client data to Perfex format
     *
     * @param array $moloni_client Moloni client data
     * @return array Perfex client data
     */
    public function toPerfex($moloni_client)
    {
        // Parse name into first and last name if it's a person
        $name_parts = explode(' ', $moloni_client['name'], 2);
        $is_company = isset($moloni_client['is_company']) ? $moloni_client['is_company'] : (count($name_parts) == 1);

        $perfex_data = [
            'company' => $is_company ? $moloni_client['name'] : '',
            'firstname' => !$is_company ? $name_parts[0] : '',
            'lastname' => !$is_company && isset($name_parts[1]) ? $name_parts[1] : '',
            'email' => $moloni_client['email'] ?? '',
            'phonenumber' => $moloni_client['phone'] ?? '',
            'website' => $moloni_client['website'] ?? '',
            'vat' => $moloni_client['vat'] ?? '',
            'admin_notes' => $moloni_client['notes'] ?? ''
        ];

        // Address mapping from Moloni to Perfex
        if (!empty($moloni_client['address'])) {
            $perfex_data['address'] = $moloni_client['address'];
            $perfex_data['city'] = $moloni_client['city'] ?? '';
            $perfex_data['zip'] = $moloni_client['zip_code'] ?? '';
            $perfex_data['state'] = $moloni_client['state'] ?? '';
            $perfex_data['country'] = $this->get_perfex_country_id($moloni_client['country_id']);
        }

        // Shipping address mapping
        if (!empty($moloni_client['shipping_address'])) {
            $shipping = $moloni_client['shipping_address'];
            $perfex_data['shipping_street'] = $shipping['address'] ?? '';
            $perfex_data['shipping_city'] = $shipping['city'] ?? '';
            $perfex_data['shipping_zip'] = $shipping['zip_code'] ?? '';
            $perfex_data['shipping_state'] = $shipping['state'] ?? '';
            $perfex_data['shipping_country'] = $this->get_perfex_country_id($shipping['country_id']);
        }

        // Contact information mapping
        if (!empty($moloni_client['contact_info'])) {
            $contact = $moloni_client['contact_info'];
            $perfex_data['mobile'] = $contact['mobile'] ?? '';
            $perfex_data['fax'] = $contact['fax'] ?? '';
            $perfex_data['alternative_email'] = $contact['alternative_email'] ?? '';
        }

        // Preferences mapping
        if (!empty($moloni_client['preferences'])) {
            $prefs = $moloni_client['preferences'];
            $perfex_data['default_language'] = $prefs['language'] ?? 'portuguese';
            $perfex_data['default_currency'] = $prefs['currency'] ?? 'EUR';
            $perfex_data['payment_terms'] = $prefs['payment_terms'] ?? 30;
            $perfex_data['credit_limit'] = $prefs['credit_limit'] ?? 0;
        }

        // Financial information mapping
        if (!empty($moloni_client['financial_info'])) {
            $financial = $moloni_client['financial_info'];
            $perfex_data['tax_exempt'] = $financial['tax_exempt'] ?? false;
            $perfex_data['discount_percent'] = $financial['discount_percent'] ?? 0;
            $perfex_data['billing_cycle'] = $financial['billing_cycle'] ?? 'monthly';
        }

        // Map custom fields back to Perfex
        if (!empty($moloni_client['custom_fields'])) {
            $perfex_data = array_merge($perfex_data, $this->map_moloni_custom_fields($moloni_client['custom_fields']));
        }

        return array_filter($perfex_data, function($value) {
            return $value !== null && $value !== '';
        });
    }

    /**
     * Map Perfex custom fields to Moloni format with custom mapping support
     */
    private function map_custom_fields($perfex_client)
    {
        $custom_fields = [];

        // Load custom fields for clients with field mapping
        $this->CI->load->model('custom_fields_model');
        $client_custom_fields = $this->CI->custom_fields_model->get('clients');

        foreach ($client_custom_fields as $field) {
            $field_name = 'custom_fields[' . $field['id'] . ']';
            if (isset($perfex_client[$field_name])) {
                // Custom field mapping with field mapping support
                $custom_fields[$field['name']] = [
                    'value' => $perfex_client[$field_name],
                    'type' => $field['type'],
                    'required' => $field['required'],
                    'mapped_to_moloni' => $this->get_moloni_field_mapping($field['name'])
                ];
            }
        }

        return $custom_fields;
    }

    /**
     * Get Moloni field mapping for custom fields
     */
    private function get_moloni_field_mapping($perfex_field_name)
    {
        // Field mapping configuration
        $field_mappings = [
            'company_size' => 'empresa_dimensao',
            'industry' => 'setor_atividade',
            'registration_number' => 'numero_registo',
            'tax_id' => 'numero_fiscal'
        ];

        return $field_mappings[strtolower($perfex_field_name)] ?? null;
    }

    /**
     * Map Moloni custom fields back to Perfex format
     */
    private function map_moloni_custom_fields($moloni_custom_fields)
    {
        $perfex_fields = [];

        // This would need to be implemented based on your specific custom field mapping strategy
        foreach ($moloni_custom_fields as $field_name => $field_data) {
            // Map back to Perfex custom field format
            $perfex_fields['moloni_' . $field_name] = $field_data['value'];
        }

        return $perfex_fields;
    }

    /**
     * Get Moloni country ID from country name/code
     */
    private function get_moloni_country_id($country)
    {
        if (empty($country)) {
            return null;
        }

        $country_mappings = [
            'Portugal' => 1, 'PT' => 1,
            'Spain' => 2, 'ES' => 2,
            'France' => 3, 'FR' => 3
        ];

        return $country_mappings[$country] ?? 1; // Default to Portugal
    }

    /**
     * Get Perfex country ID from Moloni country ID
     */
    private function get_perfex_country_id($moloni_country_id)
    {
        $country_mappings = [
            1 => 'PT', // Portugal
            2 => 'ES', // Spain
            3 => 'FR'  // France
        ];

        return $country_mappings[$moloni_country_id] ?? 'PT';
    }
}