<?php

namespace Icinga\Monitoring\Backend;

use Icinga\Data\DatasourceInterface;
use Icinga\Exception\ProgrammingError;
use Icinga\Application\Benchmark;
use Zend_Config;

class AbstractBackend implements DatasourceInterface
{
    protected $config;

    public function __construct(Zend_Config $config = null)
    {
        if ($config === null) {
            // $config = new Zend_Config(array()); ???
        }
        $this->config = $config;
        $this->init();
    }

    protected function init()
    {
    }
    
    /**
     * Dummy function for fluent code
     *
     * return self
     */
    public function select()
    {
        return $this;
    }

    /**
     * Create a Query object instance for given virtual table and desired fields
     *
     * Leave fields empty to get all available properties
     *
     * @param string Virtual table name
     * @param array  Fields
     * return self
     */
    public function from($virtual_table, $fields = array())
    {
        $classname = $this->tableToClassName($virtual_table);
        if (! class_exists($classname)) {
            throw new ProgrammingError(
                sprintf(
                    'Asking for invalid virtual table %s',
                    $classname
                )
            );
        }
        $query = new $classname($this, $fields);
        return $query;
    }

    public function hasView($virtual_table)
    {
        // TODO: This is no longer enough, have to check for Query right now
        return class_exists($this->tableToClassName($virtual_table));
    }

    protected function tableToClassName($virtual_table)
    {
        return 'Icinga\\Monitoring\\View\\'
             // . $this->getName()
             // . '\\'
             . ucfirst($virtual_table)
             . 'View';
    }

    public function getName()
    {
        return preg_replace('~^.+\\\(.+?)$~', '$1', get_class($this));
    }

    public function __toString()
    {
        return $this->getName();
    }


    // UGLY temporary host fetch
    public function fetchHost($host)
    {
        $select = $this->select()
                 ->from('status', array(
                    'host_name',
                    'host_address',
                    'host_state',
                    'host_handled',
                    'host_in_downtime',
                    'host_acknowledged',
                    'host_check_command',
                    'host_last_state_change',
                    'host_alias',
                    'host_output',
                    'host_long_output',
                    'host_perfdata',
                ))
                 ->where('host_name', $host);
        return $select->fetchRow();
        $object = \Icinga\Objects\Host::fromBackend(
            $this->select()
                 ->from('status', array(
                    'host_name',
                    'host_address',
                    'host_state',
                    'host_handled',
                    'host_in_downtime',
                    'host_acknowledged',
                    'host_check_command',
                    'host_last_state_change',
                    'host_alias',
                    'host_output',
                    'host_long_output',
                    'host_perfdata',
                ))
                 ->where('host_name', $host)
                 ->fetchRow()
        );
        // $object->customvars = $this->fetchCustomvars($host);
        return $object;
    }

    // UGLY temporary service fetch
    public function fetchService($host, $service)
    {
Benchmark::measure('Preparing service select');
        $select = $this->select()
                ->from('status', array(

                    'host_name',
                    'host_state',
                    'host_check_command',
                    'host_last_state_change',

                    'service_description',
                    'service_state',
                    'service_acknowledged',
                    'service_handled',
                    'service_output',
                    'service_long_output',
                    'service_perfdata',
                    // '_host_satellite',
                    'service_check_command',
                    'service_last_state_change',
                    'service_last_check',
                    'service_next_check',
                    'service_check_execution_time',
                    'service_check_latency',
        //            'service_
                ))
                ->where('host_name', $host)
                ->where('service_description', $service);
        // Benchmark::measure((string) $select->getQuery());
Benchmark::measure('Prepared service select');

        return $select->fetchRow();
        $object = \Icinga\Objects\Service::fromBackend(
            $this->select()
                ->from('status', array(

                    'host_name',
                    'host_state',
                    'host_check_command',
                    'host_last_state_change',

                    'service_description',
                    'service_state',
                    'service_acknowledged',
                    'service_handled',
                    'service_output',
                    'service_long_output',
                    'service_perfdata',
                    // '_host_satellite',
                    'service_check_command',
                    'service_last_state_change',
                    'service_last_check',
                    'service_next_check',
                    'service_check_execution_time',
                    'service_check_latency',
        //            'service_
                ))
                ->where('host_name', $host)
                ->where('service_description', $service)
                ->fetchRow()
        );
        // $object->customvars = $this->fetchCustomvars($host, $service);
        return $object;
    }


}