<?php

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Scripting/PHPClass.php to edit this template
 */

/**
 * Description of Database
 *
 * @author SCTN4
 */
class Database {
    protected $connection = null;
    public function __construct()
    {
        try {
            mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
            $this->connection = new mysqli(DB_HOST, DB_USERNAME, DB_PASSWORD, DB_DATABASE_NAME);
    	
            if ( mysqli_connect_errno()) {
                throw new Exception("Could not connect to database.");   
            }
        } catch (Exception $e) {
            throw new Exception($e->getMessage());   
        }			
    }
    
    public function processQuery($query = "", $params = [])
    {
        try {
            $stmt = $this->executeQuery( $query, $params );
            $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);				
            $stmt->close();
            return $result;
        } catch(Exception $e) {
            throw New Exception( $e->getMessage() );
        }
        return false;
    }
    
    private function executeQuery($query = "" , $params = [])
    {
        try {
            $stmt = $this->connection->prepare( $query );
            if($stmt === false) {
                throw New Exception("Unable to do prepared statement: " . $query);
            }
            if( $params ) {
                $stmt->bind_param($params[0], $params[1]);
            }
            $stmt->execute();
            return $stmt;
        } catch(Exception $e) {
            throw New Exception( $e->getMessage());
        }	
    }
    
    public function processStatement($query = "", $params = [])
    {
        try {
            $keys = array_keys($params);
            $n = count($params);

            $query .= " (" . $params[$keys[0]] . ", ";
            for($i = 1; $i < $n-1; $i++) {
                $query .= "'" . $params[$keys[$i]] . "', ";
            }
            $query .= $params[$keys[$i]] . ")";

            //Prepare the statement
            $stmt = $this->connection->stmt_init();
            $stmt = $this->connection->prepare($query);
            if($stmt === false) {
                throw New Exception("Unable to prepare the statement: " . $query);
            }
            
            $result = $stmt->execute();
            if($result === false) {
                throw New Exception("Unable to execute the statement.");
            }
            
            $rowCount = $this->connection->affected_rows;
            if($rowCount < 1)
            {
                throw New Exception("Statement did not return any rows: " . $query);
            }
            
            $stmt->close();
            return $rowCount;
        } catch(Exception $e) {
            throw New Exception( $e->getMessage() );
        }
        return false;
    }
    
    private function executeStatement(&$stmt)
    {
        try {
            return var_dump($stmt);
            $result = $stmt->execute();
            
            if($result === false) {
                throw New Exception("Unable to execute the statement.");
            }
            
            $rowCount = $this->connection->affected_rows;
            return $rowCount;
        } catch(Exception $e) {
            throw New Exception( $e->getMessage() );
        }	
    }
    
    private function initStatement()
    {
        $statement = mysqli_stmt_init($this->connection);
        return $statement;
    }
    private function prepareStatement($statement, $querystring)
    {
        
    }
}