<?php namespace App\Flux\Components;

use App\Log;
use Carbon\Carbon;

trait LoggableTrait
{
    
    /**
     * Creating the model relationships to Logs
     * 
     * @return mixed
     */
    public function logs()
    {
        return $this->morphMany(Log::class, 'loggable');
    }
    
    
    /**
     * Log the passed in message by appending to the current log or create a new log entry.
     * 
     * @param $message
     * @return $this
     */
    public function log($message)
    {
        $name = $this->currentLogName();
        
        $log = $this->logs()->firstOrNew(['name' => $name]);
        
        $log->body .= $this->messagePrefix($log->body) . $message;
        
        $log->save();

        return $this;
    }
    
    
    /**
     * Return the current log
     * 
     * @return mixed
     */
    public function currentLog()
    {
        $name = $this->currentLogName();

        return $this->logs()->where('name', $name)->first();
    }
    
    
    public function clearLogs()
    {
        return $this->logs()->delete();
    }
    
    
    /**
     * Return the current log's name build from the current date and model class name.
     * 
     * @return string
     */
    protected function currentLogName()
    {
        return Carbon::now()->format('Y-m-d') . '_' . strtolower(get_class($this));
    }
    
    
    /**
     * Returns the prefix for the message being added to the log
     * @param $currentLogBody
     * @return string
     */
    protected function messagePrefix($currentLogBody)
    {
        return ($currentLogBody ? "\n" : "") . $this->logDateTimeStamp();
    }
    
    
    /**
     * The prefixed date time stamp that is added before a log message
     * 
     * @return string
     */
    protected function logDateTimeStamp()
    {
        return Carbon::now()->toDateTimeString() . ' ';
    }
}