<?php
/*
* @package		Tech Fry Library
* @license		https://www.gnu.org/licenses/gpl-3.0.en.html
*/

namespace TechFry\Library\View\Others;

defined('_JEXEC') or die;

// Reference: https://quickchart.io/
class Chart
{
    public $api_data = array();
    
    public $type; // bar, line

    public $data;

    public $options;

    public $data_sets;

    public $labels;

    public function __construct($type)
    {
        $this->type = $type;
        
        $this->api_data['type'] = $type;
    }
    
    public function display()
    {
        $function = 'get_' . $this->type;
        
        //$this->$function();
        
        $json = json_encode($this->api_data);

        $json = str_replace('"', "'", $json);
        
        $url = 'https://quickchart.io/chart?c=' . $json;
        
        $output = '<img class="img-fluid" src="' . $url . '">';
        
        return $output;
    }

    public function get_bar()
    {
        

    }

    public function add_labels($labels)
    {
        // $labels - string or array

        if (\is_string($labels))
        {
            $labels = str_getcsv($labels);
            $labels = array_map('trim', $labels);
        }

        $this->api_data['data']['labels'] = $labels;
    }

    public function add_data($data)
    {
        if (\is_string($data))
        {
            $data = str_getcsv($data);
            $data = array_map('trim', $data);
        }

        $this->api_data['data']['datasets'][] = array('data' => $data);
    }

    // Add label to dataset
    public function add_label($label)
    {
        $this->api_data['data']['datasets'][0]['label'] = $label;
    }

    // Add background color to dataset
    public function add_bg($color)
    {
        $this->api_data['data']['datasets'][0]['backgroundColor'] = $color;
    }

    // Add border color to dataset
    public function add_border($color)
    {
        $this->api_data['data']['datasets'][0]['borderColor'] = $color;
        $this->api_data['data']['datasets'][0]['fill'] = false;
    }

    // Add width to dataset
    public function add_width($width)
    {
        // $width - 0 to 1

        $this->api_data['data']['datasets'][0]['barPercentage'] = $width;
    }

    public function add_dataset($dataset = array())
    {
        // $dataset - label, data, backgroundColor, maxBarThickness

    }
    
    public static function get_output($content, $config = array())
    {
        // content - chart_type, labels, dp
        // config
        
        if (empty($content))
        {
            return;
        }
        
        $datapoints = $content['dp'];
        $labels = $content['labels'];
        $chart_type = $content['chart_type'];
        
        if (is_string($labels))
        {
            $labels = str_getcsv($labels);
            $labels = array_map('trim', $labels);
        }
        
        if (is_string($datapoints))
        {
            $datapoints = str_getcsv($datapoints);
            $datapoints = array_map('trim', $datapoints);
        }
        
        switch ($chart_type)
        {
            case 'bar' :
            case 'horizontalBar' :
            case 'line' :
            case 'radar' :
            case 'pie' :
            case 'doughnut' :
            case 'polarArea' :
                $api_data = array(
                    'type' => $chart_type,
                    'data' => array(
                        'labels' => $labels,
                        'datasets' => array(
                            array(
                                'label' => 'Value',
                                'data' => $datapoints,
                              	'backgroundColor' => 'green',
                              	'maxBarThickness' => 10,
                                )
                            )
                        )
                    );
                break;
                
            case 'radialGauge' :
            case 'progressBar' :
                $api_data = array(
                    'type' => $chart_type,
                    'data' => array(
                        'datasets' => array(
                            array(
                                'data' => $datapoints
                                )
                            )
                        )
                    );
                break;
        }
            
        $json = json_encode($api_data);
                
        $json = str_replace('"', "'", $json);
        
        $url = 'https://quickchart.io/chart?c=' . $json;
        
        $output = '<img src="' . $url . '">';
        
        return $output;
    }
  
  	public static function bar_chart($x_labels, $data = array())
    {
    	// $data - array: label, data, backgroundColor, maxBarThickness
      
      	if (is_string($x_labels))
        {
            $x_labels = str_getcsv($x_labels);
            $x_labels = array_map('trim', $x_labels);
        }
      
      	$api_data = array(
          'type' => 'bar',
          'data' => array(
            'labels' => $x_labels,
            'datasets' => $data
          )
        );
      
      	$json = json_encode($api_data);
                
        $json = str_replace('"', "'", $json);
        
        $url = 'https://quickchart.io/chart?c=' . $json;
        
        $output = '<img src="' . $url . '">';
        
        return $output;
    }
}