//introducing state variable

pragma solidity ^0.4.17;

contract Car {
 
	string model;
	uint256 daily_rate;
	address creator;  //store the address of the creator (BOB)
	address whoRentsCar;
	bool carIsRented;
    
	function Car(string argmodel,uint256 arg_daily_rate) payable public
	{
    	model = argmodel;
    	daily_rate = arg_daily_rate;
    	creator =msg.sender;	//assigning the value of owner in creator	 
	}
    
 	modifier onlyAccessedBy(address _para) {
    	require(msg.sender == _para); // If it is incorrect here, it reverts.
    	_;                          	// Otherwise, it continues.
	}
    
    
	function getCarModel()  public view returns(string)
	{
    	return model;
	}
    
	function setDailyRate(uint256 arg_dailyRate) onlyAccessedBy(creator)
	{
   	 
    	require(carIsRented==false);
    	daily_rate = arg_dailyRate;
	}
    
	function getDailyRate () public view returns (uint256)
	{
    	return daily_rate;
	}
    
 	function getBalance() public view  returns(uint256)
	{
    	return address(this).balance;
	}
    
	function rent() payable public
	{
   	 
    	whoRentsCar = msg.sender;
    	require(msg.value > 1 ether);
    	carIsRented=true;
	}
    
	function return_car(uint256 noofdays) onlyAccessedBy(whoRentsCar)
	{
    	require(carIsRented==true);
    	carIsRented=false;
    	msg.sender.transfer((address(this).balance) - (noofdays * daily_rate));
    	
	}
    
	function collect_fees() public onlyAccessedBy(creator)
	{
    	require(carIsRented==false);
    	msg.sender.transfer((address(this).balance));
	}
    
}