<?php


use Joomla\CMS\Factory;

// No direct access.
defined('_JEXEC') or die;

abstract class AbstractCommonClubsModel
{
    // TODO Add data validator
    // TODO Make setting of values attribute fail in case of problems
    // FIXME Add Joins in select statements
    
    private $id;
    private $new;
    
    public function getId()
    {
        return $this->id;
    }
    
    public function setId($id)
    {
        $this->id = $id;
    }
    
    private $values = null;
    
    protected function getValues($force = false)
    {
        if(is_null($this->values) || $force)
            $this->loadDataFromDatabase();
        
        return $this->values;
    }
    
    public function isNew()
    {
        return $this->new;
    }
    
    public function setValues($values, $unpack = false)
    {
        if($unpack)
            $this->values = $this->unpackExternalReferencesFromKeys($values);
        else 
            $this->values = $values;
    }
    
    public function applyAndMergeValues($values, $unpack = true)
    {
        $vals = $this->getValues();
        
        if($unpack)
            $vals = $this->packExternalReferencesAsKeys($vals);
        
        foreach($this->getFactory()->getAttributes() as $column)
        {
            if(array_key_exists($column->getAlias(), $values))
            {
                $vals[$column->getAlias()] = $values[$column->getAlias()];
            }
        }
        
        if($unpack)
            $vals = $this->unpackExternalReferencesFromKeys($vals);
        
        $this->setValues($vals, false);
    }
    
    protected function setValue($key, $value)
    {
        if(is_null($this->values))
            $this->loadDataFromDatabase();
        
        $this->values[$key] = $value;
    }
    
    public function markAsNew($new)
    {
        $this->new = $new;
    }
    
    public function fillDefaultValues()
    {}
    
    /**
     * @return AbstractCommonClubsModelFactory
     */
    protected abstract function getFactory();
    
    public function save()
    {
        $factory = $this->getFactory();
        $attribs = $factory->getAttributes();
        
        $db = Factory::getDbo();
        $q = $db->getQuery(true);
        
        $db->transactionStart();
        
        if($this->new)
            $this->prepareInsert($attribs, $factory, $q);
        else
            $this->prepareUpdate($attribs, $factory, $q);
        
        $db->setQuery($q);
        $db->execute();
        
        if($this->new)
        {
            $this->finishInsert($db);
        }
        
        $db->transactionCommit();
    }
    
    private function loadDataFromDatabase()
    {
        $factory = $this->getFactory();
        $attribs = $factory->getAttributes();
        
        $db = Factory::getDbo();
        $q = $db->getQuery(true);
        
        foreach($attribs as $a)
        {
            $a->select($q);
        }
        $q->from($factory->getTableName());
        $q->where("id = {$this->id}");
        
        $joins = $factory->getJoins();
        foreach($joins as $j)
        {
            $j->join($q);
        }
        
        $db->setQuery($q);
        $db->execute();
        
        $values = $db->loadAssoc();
        
        $values = $this->unpackExternalReferencesFromKeys($values);
        
        $this->values = $values;
    }
    
    private function packExternalReferencesAsKeys($vals)
    {
        foreach($this->getFactory()->getAttributes() as $a)
        {
            $alias = $a->getAlias();
            $vals[$alias] = $a->packValue($vals[$alias]);
        }
        
        // XXX Joins
        return $vals;
    }
    
    private function unpackExternalReferencesFromKeys($vals)
    {
        $factory = $this->getFactory();
        
        foreach($factory->getAttributes() as $a)
        {
            $alias = $a->getAlias();
            if(isset($vals[$alias]))
                $vals[$alias] = $a->unpackValue($vals[$alias]);
        }
        
        $joins = $factory->getJoins();
        foreach($joins as $join)
        {
            $join->unpackExternalReferencesFromKeys($vals);
        }
        
        return $vals;
    }
    
    
    /**
     * 
     * @param array $rawData
     * @param AbstractCommonClubsModelColumn[] $attribs
     * @param JDatabaseQuery $q
     * @return string[]|number[]|NULL[]
     */
    private function quoteData($rawData, $attribs, $q)
    {
        $quotedData = array();
        
        foreach($attribs as $a)
        {
            $alias = $a->getAlias();
            $quotedData[$alias] = $a->getQuotedValue($q, $rawData[$alias]);
        }
        
        return $quotedData;
    }
    
    protected function filterDatabaseRawData($values)
    {
        return $values;
    }
    
    protected function filterDatabaseQuotedData($quoted)
    {
        return $quoted;
    }
    
    /**
     * 
     * @param array $attribs
     * @param JDatabaseQuery $q
     * @return array
     */
    private function getQuotedData($attribs, $q)
    {
        $rawData = $this->getValues();
        $rawData = $this->filterDatabaseRawData($rawData);
        
        $quotedData = $this->quoteData($rawData, $attribs, $q);
        $quotedData = $this->filterDatabaseQuotedData($quotedData);
        
        return $quotedData;
    }
    
    /**
     * 
     * @param AbstractCommonClubsModelColumn[] $attribs
     * @param AbstractCommonClubsModelFactory $factory
     * @param JDatabaseQuery $q
     */
    private function prepareInsert($attribs, $factory, $q)
    {
        $q->insert($factory->getTableName());
        
        $dbcols = array();
        foreach($attribs as $a)
        {
            $dbcols[] = $a->getColumn();
        }
        
        $q->columns($q->qn($dbcols));
        
        $quotedData = $this->getQuotedData($attribs, $q);
        
        $q->values(join(', ', $quotedData));
    }
    
    /**
     * 
     * @param JDatabaseDriver $db
     */
    private function finishInsert($db)
    {
        $this->id = $db->insertid();
        $this->new = false;
    }
    
    /**
     * 
     * @param AbstractCommonClubsModelColumn[] $attribs
     * @param AbstractCommonClubsModelFactory $factory
     * @param JDatabaseQuery $q
     */
    private function prepareUpdate($attribs, $factory, $q)
    {
        $q->update($factory->getTableName());
        
        $dbcols = array();
        foreach($attribs as $a)
            $dbcols[] = $a->getColumn();
        
        $quotedData = $this->getQuotedData($attribs, $q);
        
        $q->set(array_map(function($col, $data){
            return "$col = $data";
        }, $dbcols, $quotedData));
        
        $q->where("id = {$this->id}");
    }
    
    /**
     * 
     * @param JDatabaseDriver $db
     */
    protected function prepareDelete($db)
    {}
    
    public function delete()
    {
        $db = Factory::getDbo();
        $q = $db->getQuery(true);
        
        $factory = $this->getFactory();
        
        $q->delete($factory->getTableName());
        $q->where("id = {$this->id}");
        
        $db->transactionStart(true);
        $this->prepareDelete($db);
        $db->setQuery($q);
        $db->execute();
        $db->transactionCommit(true);
    }
    
    /**
     * 
     * @param AbstractCommonClubsModelFactory $factory
     * @param string $colName
     * @param array $constraints
     */
    protected function fetchAssociatedElements($factory, $colName, $constraints = null, $sorting = null)
    {
        $condition = "main.$colName = {$this->id}";
        
        if(isset($constraints))
        {
            if(is_array($constraints))
                $allConstraints = clone $constraints;
            elseif(is_string($constraints))
                $allConstraints = array($constraints);
            else
                throw new Exception('Unknown type of constraint');
            
            // Add the manual condition to match the current object
            $allConstraints[] = $condition;
            
            return $factory->loadElements($allConstraints, $sorting);
        }
        else
            return $factory->loadElements($condition, $sorting);
    }
    
    protected function filterPackData($values)
    {
        return $values;
    }
    
    protected function filterUnpackData($values)
    {
        return $values;
    }
    
    /**
     * @return string
     */
    public function pack()
    {
        $vals = $this->getValues();
        
        $vals = $this->packExternalReferencesAsKeys($vals);
        $vals = $this->filterPackData($vals);
        
        $json = json_encode($vals);
        return urlencode($json);
    }
    
    /**
     * @param string $str
     * @param boolean $decode
     */
    public function unpack($str, $decode = false)
    {
        if($decode)
            $json = urldecode($str);
        else 
            $json = $str;
        $data = json_decode($json, true);
        
        $vals = $this->unpackExternalReferencesFromKeys($data);
        $vals = $this->filterUnpackData($vals);
        
        $this->setValues($vals);
    }
    
    public function dataIsValid()
    {
        return true;
    }
    
}