<?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);
        $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)
    ]);
}
}