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<?php

defined('BASEPATH') OR exit('No direct script access allowed');

class Api extends MX_Controller {

    public function __construct() 
    {
        parent::__construct();
        $this->load->library('session','form_validation','sms_gateway','sendMail');
        // Load necessary models or libraries here if needed
        $this->load->model(['frontend/Register_model', 'frontend/Subscribe_model', 'frontend/Home_model','admin/Product_model','admin/Product_interest_model','admin/Notification_model']);         
    }

    public function commodity_list() 
    {

        // Fetch commodity list from the model
        $commodity_list = $this->Subscribe_model->commodities();

        // Specify the ID to remove
        $id_to_remove = "19"; // Replace with the actual ID to remove

        // Remove the commodity with the specified ID
        $commodity_list = array_filter($commodity_list, function($commodity) use ($id_to_remove) {
            return $commodity['id'] !== $id_to_remove;
        });

        // Re-index the array to fix the array keys after filtering
        $commodity_list = array_values($commodity_list);

        $this->output
             ->set_content_type('application/json')
             ->set_output(json_encode($commodity_list));
    }
   
    public function product_list()
    {
        $product_list = $this->Product_interest_model->fetch();
        $this->output
            ->set_content_type('application/json')
            ->set_output(json_encode($product_list));
    }

    public function product_master_list()
    {
        $product_list = $this->Product_model->fetch();
        $this->output
            ->set_content_type('application/json')
            ->set_output(json_encode($product_list));
    }

    public function subscription_period()
    {
        $period_list = ['6_month','1_year','3_year','5_year'];
        $this->output
            ->set_content_type('application/json')
            ->set_output(json_encode($period_list));
    }

    public function submit_form()
    {
        // Common validation rules
        $this->form_validation->set_rules('book_email', 'E-mail ID', 'required|trim|valid_email');
        $this->form_validation->set_rules('book_contact', 'Contact Number', 'required|trim|numeric|min_length[7]|max_length[15]');
        $this->form_validation->set_rules('verify_otp', 'OTP', 'required|trim|exact_length[4]|numeric');
        $this->form_validation->set_rules('book_name', 'Name', 'required|trim');

        // Run validation
        if ($this->form_validation->run() == FALSE) {
            $response = array(
                'status' => FALSE,
                'message' => validation_errors()
            );
            echo json_encode($response);
            return;
        }

        // Prepare data for saving
        $services = $this->input->post('services');
        $products = $this->input->post('commodities');

        $save_data = array(
            'book_name' => $this->input->post('book_name'),
            'book_organisation' => $this->input->post('book_organisation'),
            'book_designation' => $this->input->post('book_designation'),
            'book_contact' => $this->input->post('contactNo'),
            'book_email' => $this->input->post('book_email'),
            'book_message' => $this->input->post('book_message'),
            'book_prefered_time' => $this->input->post('book_prefered_time'),
            'book_product_interest' => implode(', ', $this->getProductNames($services)),
            'book_url' => $this->input->post('book_url'),
            'book_ip_address' => $this->input->ip_address(),
            'book_date' => date('Y-m-d H:i:s'),
        );
        // Use a transaction for multiple database operations
        $this->db->trans_start();

        // Check if email already exists if services contain '1' (assuming service '1' is related to subscription)
        $message = ''; // Initialize the message for notifications

        if (in_array('1', $services)) {
            $email = $save_data['book_email'];
            $email_exists = $this->Register_model->is_unique_check($email);

            if ($email_exists) {
                // Rollback transaction and set response if email already exists
                $this->db->trans_rollback();
                $response = array(
                    'status' => FALSE,
                    'message' => 'This email address is already registered.'
                );
                echo json_encode($response);
                return;
            } else {
                // Save data to subscription register
                $subscription_data = array(
                    'first_name' => $save_data['book_name'],
                    'organization' => $save_data['book_organisation'],
                    'designation' => $save_data['book_designation'],
                    'mobile' => $save_data['book_contact'],
                    'email' => $save_data['book_email'],
                    'created_at' => $save_data['book_date'],
                    'subscription_type' => '4',
                    'country' => '104',
                    'user_type' => 'Unregister',
                    'choose_type' => is_array($products) ? implode(', ', $products) : $products,
                    'free_trial' => $this->input->post('free_trial') ? '3days_trial' : '',
                    'start_reg' => date('Y-m-d'),
                    'end_reg' => date('Y-m-d', strtotime("+3 days"))
                );
                $save_result_subscription = $this->Register_model->insertSubscriptionRegister($subscription_data);


                // Add the lead message if only service 1 is selected
                if (count($services) == 1) {
                    $title = "New Leads";
                    $message = "New lead generated for " . implode(", ", $this->getProductNames($services)) . ".";
                }
            }
        }
        // If services array contains '2' or '3' (Assuming they are related to free demo)
        if (in_array('2', $services) || in_array('3', $services)) {
            // Save data to book demo table
            $save_result_book_demo = $this->Home_model->insertBookDemo($save_data);

            // Prepare demo related notification message
            if (count($services) == 1) {
                // Only service '2' or '3' selected, message is based on that service
                $service_names = array();
                if (in_array('2', $services)) {
                    $service_names[] = "New lead generated for " . implode(", ", $this->getProductNames($services)) . ".";
                }
                if (in_array('3', $services)) {
                    $service_names[] = "New lead generated for " . implode(", ", $this->getProductNames($services)) . ".";
                }
                $title = "New Demo Leads";
                $message = implode(" and ", $service_names) . " .";
            } else {
                $title = "New Demo Leads";
                // Both service '2' and '3' selected
                $message = "New lead generated for " . implode(", ", $this->getProductNames($services)) . ".";
            }
        }

        // If both services '1' and '2' or '3' are selected, combine messages
        if (count($services) > 1) {
            $title = 'New Leads';
            // Combine the messages for both subscription and demo services
            $combined_message = "New lead generated for " . implode(", ", $this->getProductNames($services)) . ". ";
            $message = $combined_message;
        }

        // Send the notification
        $this->Notification_model->add_notification($title, $message, 'admin', '1');

        // Complete transaction
        $this->db->trans_complete();

        // Check if both save operations were successful
        if ($this->db->trans_status() === FALSE) {
            $response = array(
                'status' => FALSE,
                'message' => 'There was an issue with your submission. Please try again later.'
            );
        } else {
            $response = array(
                'status' => TRUE,
                'save_data' => $save_data,
                'services' => $this->input->post('services'),
                'message' => 'Thank you for your interest. Our team will contact you shortly.'
            );
        }

        // Return JSON response for AJAX request
        if ($this->input->is_ajax_request()) {
            echo json_encode($response);
        } else {
            // Handle non-AJAX submission (optional)
            // $this->load->view('your_view', $data);
        }
    }

    // Function to fetch product names based on IDs
    private function getProductNames($product_ids)
    {
        $product_list = $this->Product_interest_model->fetch(); // Assuming this fetches the product data
        // Map product IDs to product names
        $product_names = [];
        foreach ($product_list as $product) {
            if (in_array($product['product_id'], $product_ids)) {
                $product_names[] = $product['product_name'];
            }
        }

        return $product_names;
    }

    // Function to send confirmation email
    public function sendConfirmationEmail()
    {
        // Validate and retrieve POST data
        $data = $this->input->post('save_data');
        $services = $this->input->post('services');

        if (!$data || !$services) {
            $this->jsonResponse(false, 'Invalid input data.');
        }

        $toEmail = $data['book_email'];
        $recipientName = $data['book_name'];
        $filePath = null; // Optional main file, if you use it

        // Generate subject dynamically
        $product_names = $this->getProductNames($services);
        // Determine the template and subject based on selected services
        if (in_array('1', $services)) {
            if (count($services) == 1) {
                $template = 'rmpts';
                $subject = 'Raw Materials Price Tracking Services -CostMasters';
                $attachments = FCPATH . '/assets/frontend/files/CostMasters_RMPTS_presentation.pdf';
            } elseif (in_array('2', $services) || in_array('3', $services)) {
                $template = 'rmpts';
                $subject = 'Raw Materials Price Tracking Services -CostMasters';
                $attachments = FCPATH . '/assets/frontend/files/CostMasters_RMPTS_presentation.pdf';
            }
        } elseif (in_array('2', $services)) {
            if (count($services) == 1) {
                $template = 'ice';
                $subject = 'Digitization of Zero Base Costing & Cost Management -CostMasters ICE';
                $attachments = [
                    FCPATH . 'assets/frontend/files/CostMasters_ICE_Thanks.pdf',
                    FCPATH . 'assets/frontend/files/InformationRequired-ICE.pdf'
                ];

            } elseif (in_array('3', $services)) {
                $template = 'ice';
                $subject = 'Digitization of Zero Base Costing & Cost Management -CostMasters ICE';
                $attachments = [
                    FCPATH . 'assets/frontend/files/CostMasters_ICE_Thanks.pdf',
                    FCPATH . 'assets/frontend/files/InformationRequired-ICE.pdf'
                ];
            }
        } elseif (in_array('3', $services)) {
            $template = 'rapidrfq';
            $subject = 'Quick Introduction - CostMasters Rapid RFQ';
            $attachments = [
                    FCPATH . 'assets/frontend/files/Rapid_RFQ_Presentation.pdf',
                    FCPATH . 'assets/frontend/files/RFQ_information_required.pdf'
            ];          

        }

        // Load email template
        $message = $this->load->view($template, ['data' => $data], true);
        // Send email
        $send_mail = $this->sendmail->sendEmailWithAttachments($toEmail, $recipientName, $subject, $message,$filePath,$attachments);

        if ($send_mail) {
            $this->jsonResponse(true, 'Email sent successfully.');
        } else {
            $this->jsonResponse(false, 'Failed to send email.', ['error' => $this->sendmail->getLastError()]);
        }
    }

    // Utility function for JSON responses
    private function jsonResponse($status, $message, $extraData = [])
    {
        $response = array_merge(['status' => $status, 'message' => $message], $extraData);
        echo json_encode($response);
        exit;
    }
    
    private function sendOtpEmail($toEmail)
    {
        // Generate OTP using a more secure method (random_int)
        $otp = random_int(1000, 9999);
        
        // Optionally log the OTP for debugging (remove in production)
        log_message('debug', 'Generated Email OTP: ' . $otp);
        
        // Store OTP in session (valid for 10 minutes)
        $this->session->set_userdata('email_otp', $otp);
        $this->session->set_userdata('email_otp_expiry', time() + 600); // 10 minutes validity

        // Prepare email subject
        $subject = 'Email Verification Code';

        // Prepare data to pass to the view
        $data = [
            'otp' => $otp,  // Pass the OTP to the email template
            'expiry_time' => 10  // Example of passing expiration time
        ];

        // Load email template and pass dynamic data
        $msg = $this->load->view('email-otp', ['data' => $data], true);

        try {
            // Send the email
            $send_mail = $this->sendmail->sendTo($toEmail, $toEmail, $subject, $msg);

            // Check if email was sent successfully
            if ($send_mail) {
                // Return success (for debugging, include the OTP)
                return ['success' => true, 'otp' => $otp];
            } else {
                // Log the error if email sending fails
                log_message('error', 'Mailer Error: ' . $this->sendmail->ErrorInfo);
                return ['success' => false, 'error' => 'Failed to send OTP email.'];
            }
        } catch (Exception $e) {
            // Catch any exception and log it
            log_message('error', 'Exception caught while sending OTP email: ' . $e->getMessage());
            return ['success' => false, 'error' => 'An error occurred while sending OTP email.'];
        }
    }

    public function send_otp_email()
    {
        if (!$this->input->is_ajax_request()) {
            show_404(); // Handle only AJAX requests
        }

        $email = $this->input->post('email');

        // Validate email
        if (!$email || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
            $this->output->set_status_header(400);
            echo json_encode(['error' => 'Invalid email. Please enter a valid email address.']);
            return;
        }
        
        // Generate and send the OTP email
        $result = $this->sendOtpEmail($email);
        if ($result['success']) {
            // Returning the OTP for debugging purposes
            echo json_encode([
                'status'  => 'true',
                'otp'     => $result['otp'],  // If needed, this could be removed in production
                'message' => 'OTP sent successfully to your email.'
            ]);
        } else {
            $this->output->set_status_header(500);
            echo json_encode(['status' => 'false', 'error' => $result['error']]);
        }
    }
    
    public function send_otp()
    {
        // Ensure it's an AJAX request
        if (!$this->input->is_ajax_request()) {
            show_404(); // Handle only AJAX requests
        }
        // Get the contact number from POST data
        $contact_no = $this->input->post('contactNo');
        // Validate input
        if (!$contact_no || !is_numeric($contact_no) || strlen($contact_no) !== 10) {
            $this->output->set_status_header(400);
            echo json_encode(array('error' => 'Invalid contact number.'));
            return;
        }
        // Generate OTP
        $otp = rand(1000, 9999);
        // Store OTP in session or database for validation
        $this->session->set_userdata('mobile_otp', $otp);
        $this->session->set_userdata('contact_no', $contact_no);
        $this->session->set_userdata('mobile_otp_expiry', time() + 600);


        // Prepare SMS message
        $message = $otp . ' is your OTP to access CostMasters RM portal. This OTP is valid for 10 mins. Do not disclose it to anyone.';
        $senderId = 'CIRxCM';
        // Assuming $this->sms_gateway is your SMS gateway library instance
        $send = $this->sms_gateway->sendSms($contact_no, $message, $senderId);
        // Check if SMS was sent successfully
        if ($send) {
            // Return success response
            echo json_encode(array('status' => 'true', 'message' => 'OTP sent successfully.'));
        } else {
            // Return error response
            $this->output->set_status_header(500);
            echo json_encode(array('error' => 'Failed to send SMS.'));
        }
    }

    // Helper function for consistent error response
    private function send_error($status_code, $message)
    {
        $this->output->set_status_header($status_code);
        echo json_encode(['status' => 'false', 'error' => $message]);
    }


    public function verify_otp()
    {
        if (!$this->input->is_ajax_request()) {
            show_404(); // Restrict to AJAX requests only
        }

        $otp = $this->input->post('otp');
        $contact_no = $this->input->post('contact_no');
        $email = $this->input->post('email');
        $country_code = $this->input->post('countryCode');
        // Determine OTP type
        if ($country_code === 'in') {
        // Determine OTP type
        if (!empty($contact_no) && preg_match('/^[6789]\d{9}$/', $contact_no)) {
            $stored_otp = $this->session->userdata('mobile_otp');
            $otp_expiry = $this->session->userdata('mobile_otp_expiry');
            $type = 'mobile';
        }
        } elseif (!empty($email)) {
            $stored_otp = $this->session->userdata('email_otp');
            $otp_expiry = $this->session->userdata('email_otp_expiry');
            $type = 'email';
        } else {
            echo json_encode([
                'status' => 'false',
                // 'msg' => $contact_no . $this->session->userdata('mobile_otp'),
                'error' => 'Invalid request. Please provide OTP and either a valid mobile number or email.'
            ]);
            return;
        }

        // OTP not found
        if (!$stored_otp) {
            echo json_encode(['status' => 'false', 'error' => 'No OTP found. Please request a new OTP.']);
            return;
        }

        // OTP expiry check (10 minutes)
        if (time() > $otp_expiry) {
            if ($type === 'mobile') {
                $this->session->unset_userdata('mobile_otp');
                $this->session->unset_userdata('mobile_otp_expiry');
            } else {
                $this->session->unset_userdata('email_otp');
                $this->session->unset_userdata('email_otp_expiry');
            }
            echo json_encode(['status' => 'false', 'error' => 'OTP has expired. Please request a new one.']);
            return;
        }

        // OTP verification
        if ($otp == $stored_otp) {
            if ($type === 'mobile') {
                $this->session->unset_userdata('mobile_otp');
                $this->session->unset_userdata('mobile_otp_expiry');
            } else {
                $this->session->unset_userdata('email_otp');
                $this->session->unset_userdata('email_otp_expiry');
            }
            echo json_encode(['status' => 'true', 'verified' => $type, 'message' => ucfirst($type) . ' OTP verified successfully.']);
        } else {
            // For debugging only — remove in production
            // echo json_encode(['status' => 'false','otp' => $otp . " - " . $stored_otp,'error' => 'Invalid OTP.']);
            echo json_encode(['status' => 'false', 'error' => 'Invalid OTP. Please try again.']);
        }
    }

}