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

class Hubtel_sms extends AdminController
{
    public function __construct()
    {
        parent::__construct();
        
        $this->load->helper('hubtel_sms/hubtel_sms');
        $this->load->model('hubtel_sms_model');
        $this->load->library('hubtel_sms/hubtel_api');
    }

    public function index()
    {
        if (!has_permission('hubtel_sms', '', 'view')) {
            access_denied('Hubtel SMS');
        }

        if (!is_hubtel_sms_enabled()) {
            set_alert('warning', _l('hubtel_sms_module_disabled'));
            redirect(admin_url());
        }

        $data['title'] = _l('hubtel_sms');
        
        // Get statistics
        $data['total_messages'] = $this->hubtel_sms_model->get_total_messages();
        $data['sent_messages'] = $this->hubtel_sms_model->get_total_messages('sent');
        $data['failed_messages'] = $this->hubtel_sms_model->get_total_messages('failed');
        $data['total_cost'] = $this->hubtel_sms_model->get_total_cost();
        
        // Get messages and templates
        $data['messages'] = $this->hubtel_sms_model->get_messages();
        $data['templates'] = $this->hubtel_sms_model->get_templates();
        
        // Load client groups for bulk SMS
        $this->load->model('client_groups_model');
        $data['client_groups'] = $this->client_groups_model->get_groups();

        $this->load->view('hubtel_sms/manage', $data);
    }

    public function send_sms()
    {
        if (!has_permission('hubtel_sms', '', 'create')) {
            access_denied('Send SMS');
        }

        if ($this->input->post()) {
            $response = $this->hubtel_sms_model->send_sms(
                $this->input->post('to'),
                $this->input->post('message'),
                $this->input->post('template_id')
            );

            if ($response['success']) {
                set_alert('success', _l('sms_sent_successfully'));
            } else {
                set_alert('danger', $response['message']);
            }
        }

        redirect(admin_url('hubtel_sms'));
    }

    public function send_bulk_sms()
    {
        if (!has_permission('hubtel_sms', '', 'create')) {
            access_denied('Send Bulk SMS');
        }

        if ($this->input->post()) {
            $client_groups = $this->input->post('client_groups');
            $message = $this->input->post('message');
            $template_id = $this->input->post('template_id');

            $success = 0;
            $failed = 0;
            $total_recipients = 0;

            if (!empty($client_groups)) {
                $this->load->model('clients_model');
                foreach ($client_groups as $group_id) {
                    $clients = $this->clients_model->get_clients_by_group($group_id);
                    foreach ($clients as $client) {
                        if (!empty($client['phonenumber'])) {
                            $total_recipients++;
                            $response = $this->hubtel_sms_model->send_sms(
                                $client['phonenumber'],
                                $message,
                                $template_id
                            );
                            if ($response['success']) {
                                $success++;
                            } else {
                                $failed++;
                            }
                        }
                    }
                }
            }

            set_alert('info', sprintf(
                _l('bulk_sms_sent_info'),
                $total_recipients,
                $success,
                $failed
            ));
        }

        redirect(admin_url('hubtel_sms'));
    }

    public function view_message($id)
    {
        if (!has_permission('hubtel_sms', '', 'view')) {
            access_denied('View Message');
        }

        $message = $this->hubtel_sms_model->get_messages($id);
        
        // If message ID exists, get logs, otherwise use empty array
        $logs = [];
        if ($message && isset($message->message_id)) {
            $logs = $this->hubtel_sms_model->get_message_logs($message->message_id);
        }

        echo $this->load->view('hubtel_sms/message_details', [
            'message' => $message,
            'logs' => $logs
        ], true);
    }

    public function preview_template($id)
    {
        if (!has_permission('hubtel_sms', '', 'view')) {
            access_denied('Preview Template');
        }

        $template = $this->hubtel_sms_model->get_template($id);
        echo $this->load->view('hubtel_sms/template_preview', [
            'template' => $template
        ], true);
    }

    public function get_template($id)
    {
        if (!has_permission('hubtel_sms', '', 'view')) {
            access_denied('Get Template');
        }

        $template = $this->hubtel_sms_model->get_template($id);
        
        if ($template) {
            echo json_encode([
                'success' => true,
                'template' => $template
            ]);
        } else {
            echo json_encode([
                'success' => false,
                'message' => _l('template_not_found')
            ]);
        }
    }

    public function resend($id)
    {
        if (!has_permission('hubtel_sms', '', 'create')) {
            access_denied('Resend SMS');
        }

        $message = $this->hubtel_sms_model->get_messages($id);
        if ($message) {
            $response = $this->hubtel_sms_model->send_sms(
                $message->to,
                $message->message
            );

            echo json_encode($response);
        } else {
            echo json_encode([
                'success' => false,
                'message' => _l('message_not_found')
            ]);
        }
    }

    public function get_recipients_preview()
{
    if (!has_permission('hubtel_sms', '', 'view')) {
        access_denied('Get Recipients Preview');
    }

    $groups = $this->input->get('groups');
    $recipients = [];
    
    if (!empty($groups)) {
        $this->load->model('clients_model');
        foreach ($groups as $group_id) {
            $clients = $this->clients_model->get_clients_by_group($group_id);
            $group_name = $this->client_groups_model->get_group($group_id)->name;
            
            foreach ($clients as $client) {
                if (!empty($client['phonenumber'])) {
                    $recipients[] = [
                        'company' => $client['company'],
                        'phonenumber' => $client['phonenumber'],
                        'group_name' => $group_name
                    ];
                }
            }
        }
    }

    echo json_encode([
        'success' => true,
        'html' => $this->load->view('hubtel_sms/recipients_preview', [
            'recipients' => $recipients
        ], true),
        'count' => count($recipients)
    ]);
}

public function settings()
{
    if (!has_permission('hubtel_sms', '', 'edit')) {
        access_denied('Hubtel SMS Settings');
    }

    if ($this->input->post()) {
        $data = $this->input->post();
        
        // Update options
        update_option('hubtel_sms_client_id', $data['client_id']);
        update_option('hubtel_sms_client_secret', $data['client_secret']);
        update_option('hubtel_sms_sender_id', $data['sender_id']);
        update_option('hubtel_sms_enabled', isset($data['enabled']) ? 1 : 0);

        set_alert('success', _l('settings_updated'));
        redirect(admin_url('hubtel_sms/settings'));
    }

    // Get statistics
    $data['title'] = _l('hubtel_sms_settings');
    $data['total_messages'] = $this->hubtel_sms_model->get_total_messages();
    $data['sent_messages'] = $this->hubtel_sms_model->get_total_messages('sent');
    $data['failed_messages'] = $this->hubtel_sms_model->get_total_messages('failed');
    $data['total_cost'] = $this->hubtel_sms_model->get_total_cost();
    $data['recent_messages'] = $this->hubtel_sms_model->get_recent_messages(5);

    $this->load->view('hubtel_sms/settings', $data);
}

public function get_recent_messages()
{
    if (!has_permission('hubtel_sms', '', 'view')) {
        ajax_access_denied();
    }

    $messages = $this->hubtel_sms_model->get_recent_messages(5);
    if ($messages) {
        // Format messages for display
        foreach ($messages as &$message) {
            $message['date_sent_formatted'] = _dt($message['date_sent']);
            $message['cost_formatted'] = app_format_money($message['rate'], get_base_currency());
        }
    }
    
    echo json_encode([
        'success' => true, 
        'messages' => $messages ?? []
    ]);
}


// public function get_recent_messages()
// {
//     if (!has_permission('hubtel_sms', '', 'view')) {
//         ajax_access_denied();
//     }

//     $messages = $this->hubtel_sms_model->get_recent_messages(5);
//     echo json_encode(['success' => true, 'messages' => $messages]);
// }

public function send_test()
{
    if (!has_permission('hubtel_sms', '', 'edit')) {
        ajax_access_denied();
    }

    $number = $this->input->post('number');
    if (!$number) {
        echo json_encode([
            'success' => false,
            'message' => _l('enter_phone_number')
        ]);
        return;
    }

    $sender_id = get_option('hubtel_sms_sender_id');
    
    // Record test message attempt
    $result = $this->hubtel_api->send_sms(
        $number,
        'This Is A Test Message',
        $sender_id
    );

    // Log the test attempt
    log_activity('SMS Test Attempt - Number: ' . $number . ', Response: ' . json_encode($result));

    if ($result['success']) {
        $message = _l('test_sms_sent_successfully');
        if (isset($result['data']['messageId'])) {
            $message .= ' (ID: ' . $result['data']['messageId'] . ')';
        }
        $result['message'] = $message;
    }

    echo json_encode($result);
}


private function get_module_statistics()
{
    return [
        'total_messages' => $this->hubtel_sms_model->get_total_messages(),
        'sent_messages' => $this->hubtel_sms_model->get_total_messages('sent'),
        'failed_messages' => $this->hubtel_sms_model->get_total_messages('failed'),
        'total_cost' => $this->hubtel_sms_model->get_total_cost(),
        'recent_messages' => $this->hubtel_sms_model->get_recent_messages(5),
    ];
}


public function get_account_info()
{
    if (!has_permission('hubtel_sms', '', 'view')) {
        ajax_access_denied();
    }

    $balance = $this->hubtel_api->get_balance();
    
    if (!$balance) {
        echo json_encode([
            'success' => false,
            'message' => _l('unable_to_get_balance')
        ]);
        return;
    }
    
    echo json_encode([
        'success' => true,
        'data' => [
            'balance' => $balance['balance'] ?? 0,
            'currency' => $balance['currency'] ?? 'GHS',
            'statistics' => $this->get_module_statistics()
        ]
    ]);
}

public function template($id = '')
{
    if (!has_permission('hubtel_sms', '', $id ? 'edit' : 'create')) {
        access_denied('SMS Templates');
    }

    if ($this->input->post()) {
        $data = $this->input->post();
        
        if ($id) {
            $success = $this->hubtel_sms_model->update_template($id, $data);
            $message = _l('template_updated');
        } else {
            $success = $this->hubtel_sms_model->add_template($data);
            $message = _l('template_added');
        }

        if ($success) {
            set_alert('success', $message);
        }

        redirect(admin_url('hubtel_sms'));
    }

    $data['title'] = $id ? _l('edit_template') : _l('new_template');
    
    if ($id) {
        $data['template'] = $this->hubtel_sms_model->get_template($id);
        if (!$data['template']) {
            show_404();
        }
    }

    // Get merge fields for templates
    $data['available_merge_fields'] = [
        'client' => [
            '{contact_firstname}' => _l('contact_firstname'),
            '{contact_lastname}' => _l('contact_lastname'),
            '{client_company}' => _l('client_company'),
            '{client_phonenumber}' => _l('client_phonenumber')
        ],
        'invoice' => [
            '{invoice_number}' => _l('invoice_number'),
            '{invoice_duedate}' => _l('invoice_duedate'),
            '{invoice_total}' => _l('invoice_total'),
            '{invoice_status}' => _l('invoice_status')
        ]
    ];

    $this->load->view('hubtel_sms/template', $data);
}

public function delete_template($id)
{
    if (!has_permission('hubtel_sms', '', 'delete')) {
        access_denied('Delete SMS Template');
    }

    if ($this->hubtel_sms_model->delete_template($id)) {
        set_alert('success', _l('template_deleted'));
    }

    redirect(admin_url('hubtel_sms'));
}
}