<?php

declare(strict_types=1);

namespace App\Cfnpp;

/**
 * Options for controlling the Cfnpp compilation process.
 *
 * @author Adam Pippin <hello@adampippin.ca>
 */
class Options implements \App\Engine\IOptions
{
	/**
	 * Store variables for use in templates.
	 *
	 * @var array<string,mixed>
	 */
	protected $variables;

	/**
	 * Store the parameters we send to cloudformation.
	 *
	 * @var array<string,mixed>
	 */
	protected $parameters;

	public function __construct()
	{
		$this->variables = [];
		$this->parameters = [];
	}

	/**
	 * Set all variables.
	 *
	 * @param  array<string,mixed> $variables
	 * @return void
	 */
	public function setVariables(array $variables): void
	{
		$this->variables = $variables;
	}

	/**
	 * Retrieve all variables.
	 *
	 * @return array<string,mixed>
	 */
	public function getVariables(): array
	{
		return $this->variables;
	}

	/**
	 * Retrieve the value of a single variable.
	 *
	 * @param  string     $name
	 * @throws \Exception if variable does not exist
	 * @return mixed
	 */
	public function getVariable(string $name)
	{
		if (!isset($this->variables[$name]))
		{
			throw new \Exception('Unset variable: '.$name);
		}
		return $this->variables[$name];
	}

	/**
	 * Set a single variable.
	 *
	 * @param  string $name
	 * @param  mixed  $value
	 * @return void
	 */
	public function setVariable(string $name, $value): void
	{
		$this->variables[$name] = $value;
	}

	/**
	 * Check if a variable exists.
	 *
	 * @param  string $name
	 * @return bool
	 */
	public function hasVariable(string $name): bool
	{
		return isset($this->variables[$name]);
	}

	/**
	 * Set all parameters.
	 *
	 * @param  array<string,mixed> $parameters
	 * @return void
	 */
	public function setParameters(array $parameters): void
	{
		$this->parameters = $parameters;
	}

	/**
	 * Retrieve all parameters.
	 *
	 * @return array<string,mixed>
	 */
	public function getParameters(): array
	{
		return $this->parameters;
	}

	/**
	 * Retrieve the value of a single parameter.
	 *
	 * @param  string     $name
	 * @throws \Exception if parameter does not exist
	 * @return mixed
	 */
	public function getParameter(string $name)
	{
		if (!isset($this->parameters[$name]))
		{
			throw new \Exception('Unset parameter: '.$name);
		}
		return $this->parameters[$name];
	}

	/**
	 * Set a single parameter.
	 *
	 * @param  string $name
	 * @param  mixed  $value
	 * @return void
	 */
	public function setParameter(string $name, $value): void
	{
		$this->parameters[$name] = $value;
	}

	/**
	 * Check if a parameter exists.
	 *
	 * @param  string $name
	 * @return bool
	 */
	public function hasParameter(string $name): bool
	{
		return isset($this->parameters[$name]);
	}
}