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

class Campaign extends Admin_Controller
{
    public function __construct()
    {
        parent::__construct();
        $this->load->model([
            'customer_m',
            'product_m',
            'category_m',
            'Subscriber_m',
            'Subscriber_group_m',
            'Campaign_email_template_m',
            'Campaign_m',
            'Campaign_email_log_m',
            'Campaign_email_queue_m',
            'Promotional_campaign_m',
        ]);

        $this->load->helper(['url', 'security']);
        $this->load->library('form_validation');
        // $this->load->library('phpmailer_lib');
        $this->load->library('upload');
    }

    public function subscriber()
    {
        $data['userdata'] = $this->session->userdata();
        $data['title'] = 'Campaign Subscriber | Laciasmara';
        $data['subscribers'] = $this->Subscriber_m->get_all([]);
        // Send all subscriber

        $this->load->view('admin_new/layouts/header', $data);
        $this->load->view('admin_new/campaign/subscriber/index.php');
        $this->load->view('admin_new/layouts/footer');
    }

    // Website Campaign
    public function website()
    {
        $data_header['userdata'] = $this->session->userdata();
        $data_header['title'] = 'Website Campaign | Laciasmara';
        $campaigns = $this->Campaign_m->get_all_website_campaigns();

        $data['campaigns'] = $campaigns;
        $data['total_campaign'] = count($campaigns);
        $data['active_campaign'] = $this->Campaign_m->count_website_campaigns(1);
        $data['inactive_campaign'] = $this->Campaign_m->count_website_campaigns(0);
        $this->load->view('admin_new/layouts/header', $data_header);
        $this->load->view('admin_new/campaign/website/index.php', $data);
        $this->load->view('admin_new/layouts/footer');
    }

    public function edit_website_campaign($campaign_id)
    {
        $data_header['userdata'] = $this->session->userdata();
        $data_header['title'] = 'Edit Campaign | Laciasmara';

        $data['products'] = $this->product_m->all_products();
        $data['categories'] = $this->category_m->get_all_categories();
        $data['campaign'] = $this->Promotional_campaign_m->get_by_id($campaign_id);

        $this->load->view('admin_new/layouts/header', $data_header);
        $this->load->view('admin_new/campaign/website/edit.php', $data);
        $this->load->view('admin_new/layouts/footer');
    }

    public function process_update_website_campaign()
    {
        $this->output->set_content_type('application/json');
        $campaign_id = $this->input->post('id');
        try {
            // Cek apakah campaign exists
            $existing_campaign = $this->Promotional_campaign_m->get_by_id($campaign_id);
            if (!$existing_campaign) {
                $this->output->set_output(json_encode([
                    'success' => false,
                    'message' => 'Campaign not found',
                    'campaign_id' => $campaign_id
                ]));
                return;
            }

            $this->db->trans_begin();

            $banner_image = $this->_handle_file_upload_edit('banner_image', 'banner', $existing_campaign->banner_image);
            $thumbnail_image = $this->_handle_file_upload_edit('thumbnail', 'thumbnail', $existing_campaign->thumbnail);

            $campaign_data = $this->_prepare_campaign_data_edit($banner_image, $thumbnail_image);

            // Update campaign
            $update_result = $this->Promotional_campaign_m->update_campaign($campaign_id, $campaign_data);

            if (!$update_result) {
                throw new Exception('Failed to update campaign');
            }

            // Commit transaction
            if ($this->db->trans_status() === FALSE) {
                $this->db->trans_rollback();
                throw new Exception('Database transaction failed');
            } else {
                $this->db->trans_commit();
            }

            // Success response
            $this->output->set_output(json_encode([
                'success' => true,
                'message' => 'Campaign updated successfully',
                'data' => [
                    'campaign_id' => $campaign_id,
                    'code' => $campaign_data['code'],
                ]
            ]));
        } catch (Exception $e) {
            $this->db->trans_rollback();
            $this->output->set_output(json_encode([
                'success' => false,
                'message' => 'Error: ' . $e->getMessage()
            ]));
        }
    }

    public function create_website_campaign()
    {
        $data_header['userdata'] = $this->session->userdata();
        $data_header['title'] = 'Create Campaign | Laciasmara';

        // Product data
        $data['products'] = $this->product_m->all_products();
        $data['categories'] = $this->category_m->get_all_categories();

        // Category data

        $this->load->view('admin_new/layouts/header', $data_header);
        $this->load->view('admin_new/campaign/website/create.php', $data);
        $this->load->view('admin_new/layouts/footer');
    }

    public function process_create_website_campaign()
    {
        $this->output->set_content_type('application/json');
        try {
            // Validate required fields
            $validation_result = $this->_validate_campaign_data();
            if (!$validation_result['status']) {
                $this->output->set_output(json_encode([
                    'success' => false,
                    'message' => $validation_result['message'],
                    'errors' => $validation_result['errors']
                ]));
                return;
            }

            // Start database transaction
            $this->db->trans_begin();

            // Handle file uploads
            $banner_image = $this->_handle_file_upload('banner_image', 'banner');
            $thumbnail_image = $this->_handle_file_upload('thumbnail', 'thumbnail');

            $campaign_data = $this->_prepare_campaign_data($banner_image, $thumbnail_image);

            // Insert campaign
            $campaign_id = $this->Promotional_campaign_m->insert_campaign($campaign_data);

            if (!$campaign_id) {
                throw new Exception('Failed to create campaign');
            }

            // Commit transaction
            if ($this->db->trans_status() === FALSE) {
                $this->db->trans_rollback();
                throw new Exception('Database transaction failed');
            } else {
                $this->db->trans_commit();
            }

            // Success response
            $this->output->set_output(json_encode([
                'success' => true,
                'message' => 'Campaign created successfully',
                'data' => [
                    'campaign_id' => $campaign_id,
                    'code' => $campaign_data['code'],
                ]
            ]));
        } catch (Exception $e) {
        }
    }

    /**
     * Validate campaign input data
     */
    private function _validate_campaign_data()
    {
        $errors = [];

        // Required fields validation
        if (empty($_POST['name'])) {
            $errors['name'] = 'Campaign name is required';
        }

        if (empty($_POST['code'])) {
            $errors['code'] = 'Code is required';
        }


        if (!empty($errors)) {
            return [
                'status' => false,
                'message' => 'Validation failed',
                'errors' => $errors
            ];
        }

        return ['status' => true];
    }

    /**
     * Handle file upload
     */
    private function _handle_file_upload($field_name, $prefix)
    {
        if (empty($_FILES[$field_name]['name'])) {
            return null;
        }

        // Tentukan upload path berdasarkan prefix
        $upload_paths = [
            'banner'  => './uploads/campaign/full/',
            'thumbnail' => './uploads/campaign/thumbnail/',
        ];

        $config['upload_path'] = isset($upload_paths[$prefix]) ? $upload_paths[$prefix] : './uploads/campaigns/';
        $config['allowed_types'] = 'gif|jpg|png|jpeg|webp';
        $config['max_size'] = 2048;
        $config['file_name'] = $prefix . '_' . time() . '_' . uniqid();

        // Buat folder kalau belum ada
        if (!is_dir($config['upload_path'])) {
            mkdir($config['upload_path'], 0755, true);
        }

        $this->upload->initialize($config);

        if ($this->upload->do_upload($field_name)) {
            $upload_data = $this->upload->data();
            return $upload_data['file_name'];
        } else {
            throw new Exception('File upload failed: ' . $this->upload->display_errors());
        }
    }

    /**
     * Prepare campaign data for insertion
     */
    private function _prepare_campaign_data($banner_image, $thumbnail_image)
    {
        // Mengambil array data dari POST menggunakan method CodeIgniter
        $applicable_categories = $this->input->post('applicable_categories');
        $applicable_products = $this->input->post('applicable_products');
        $excluded_products = $this->input->post('excluded_products');

        // Description belom masuk

        $data = [
            'name'                  => $this->input->post('name'),
            'code'                  => $this->input->post('code'),
            'description'           => $this->input->post('description'),
            'discount_type'         => $this->input->post('discount_type'),
            'discount_value'        => $this->input->post('discount_value'),
            'min_purchase'          => $this->input->post('min_purchase') ?: null,
            'max_discount'          => $this->input->post('max_discount') ?: null,
            'start_date'            => $this->input->post('start_date'),
            'end_date'              => $this->input->post('end_date'),
            'max_usage'             => $this->input->post('max_usage') ?: null,
            'max_usage_per_user'    => $this->input->post('max_usage_per_user') ?: null,
            'is_active'             => $this->input->post('is_active') ? 1 : 0,
            'is_stackable'          => $this->input->post('is_stackable') ? 1 : 0,
            'priority'              => $this->input->post('priority') ?: $this->_get_next_priority(),
            'banner_image'          => $banner_image,
            'thumbnail'             => $thumbnail_image,

            // Convert arrays to JSON (hanya jika ada data)
            'applicable_categories' => !empty($applicable_categories) ? json_encode(array_values($applicable_categories)) : null,
            'applicable_products'   => !empty($applicable_products) ? json_encode(array_values($applicable_products)) : null,
            'excluded_products'     => !empty($excluded_products) ? json_encode(array_values($excluded_products)) : null,

            'created_at'            => date('Y-m-d H:i:s'),
            'created_by'            => $this->session->userdata('user_id') ?: 'Admin',
        ];

        return $data;
    }

    /**
     * Handle file upload for edit (dengan option keep existing file)
     */
    private function _handle_file_upload_edit($field_name, $prefix, $existing_file = null)
    {
        // Jika tidak ada file baru yang diupload
        if (empty($_FILES[$field_name]['name'])) {
            // Cek apakah user ingin menghapus file (bisa lewat checkbox atau input hidden)
            $remove_file = $this->input->post('remove_' . $field_name);
            if ($remove_file) {
                // Hapus file lama jika ada
                if ($existing_file) {
                    $this->_delete_file($prefix, $existing_file);
                }
                return null;
            }

            // Jika tidak ada file baru dan tidak dihapus, keep existing file
            return $existing_file;
        }

        // Ada file baru, hapus file lama
        if ($existing_file) {
            $this->_delete_file($prefix, $existing_file);
        }

        // Upload file baru
        $upload_paths = [
            'banner'  => './uploads/campaign/full/',
            'thumbnail' => './uploads/campaign/thumbnail/',
        ];

        $config['upload_path'] = isset($upload_paths[$prefix]) ? $upload_paths[$prefix] : './uploads/campaigns/';
        $config['allowed_types'] = 'gif|jpg|png|jpeg|webp';
        $config['max_size'] = 2048;
        $config['file_name'] = $prefix . '_' . time() . '_' . uniqid();

        // Buat folder kalau belum ada
        if (!is_dir($config['upload_path'])) {
            mkdir($config['upload_path'], 0755, true);
        }

        $this->upload->initialize($config);

        if ($this->upload->do_upload($field_name)) {
            $upload_data = $this->upload->data();
            return $upload_data['file_name'];
        } else {
            throw new Exception('File upload failed: ' . $this->upload->display_errors());
        }
    }

    /**
     * Delete old file
     */
    private function _delete_file($prefix, $filename)
    {
        if (empty($filename)) {
            return;
        }

        $upload_paths = [
            'banner'  => './uploads/campaign/full/',
            'thumbnail' => './uploads/campaign/thumbnail/',
        ];

        $file_path = $upload_paths[$prefix] . $filename;

        if (file_exists($file_path)) {
            unlink($file_path);
        }
    }

    /**
     * Prepare campaign data for update
     */
    private function _prepare_campaign_data_edit($banner_image, $thumbnail_image)
    {
        // Mengambil array data dari POST
        $applicable_categories = $this->input->post('applicable_categories');
        $applicable_products = $this->input->post('applicable_products');
        $excluded_products = $this->input->post('excluded_products');

        // Combine date and time untuk start_date dan end_date
        $start_date = $this->input->post('start_date');
        $start_time = $this->input->post('start_time');
        $end_date = $this->input->post('end_date');
        $end_time = $this->input->post('end_time');

        $data = [
            'name'                  => $this->input->post('name'),
            'code'                  => $this->input->post('code'),
            'description'           => $this->input->post('description'),
            'discount_type'         => $this->input->post('discount_type'),
            'discount_value'        => $this->input->post('discount_value') ?: 0,
            'min_purchase'          => $this->input->post('min_purchase') ?: null,
            'max_discount'          => $this->input->post('max_discount') ?: null,
            'start_date'            => $start_date . ' ' . $start_time . ':00',
            'end_date'              => $end_date . ' ' . $end_time . ':00',
            'max_usage'             => $this->input->post('max_usage') ?: null,
            'max_usage_per_user'    => $this->input->post('max_usage_per_user') ?: null,
            'is_active'             => $this->input->post('is_active') ? 1 : 0,
            'is_stackable'          => $this->input->post('is_stackable') ? 1 : 0,
            'priority'              => $this->input->post('priority') ?: 0,

            // Convert arrays to JSON (hanya jika ada data)
            'applicable_categories' => !empty($applicable_categories) ? json_encode(array_values($applicable_categories)) : null,
            'applicable_products'   => !empty($applicable_products) ? json_encode(array_values($applicable_products)) : null,
            'excluded_products'     => !empty($excluded_products) ? json_encode(array_values($excluded_products)) : null,

            'updated_at'            => date('Y-m-d H:i:s'),
        ];

        // Hanya update image jika ada perubahan
        if ($banner_image !== null) {
            $data['banner_image'] = $banner_image;
        }

        if ($thumbnail_image !== null) {
            $data['thumbnail'] = $thumbnail_image;
        }

        return $data;
    }

    private function _get_next_priority()
    {
        $this->db->select_max('priority', 'max_priority');
        $this->db->from('promotional_campaigns');
        $query = $this->db->get();

        if ($query->num_rows() > 0) {
            $result = $query->row();
            $max_priority = $result->max_priority;

            return (int)$max_priority + 1;
        }

        return 1;
    }
}