<?php

namespace NoccyLabs\SimpleJWT\Collection;

use ArrayAccess;
use Countable;

class PropertyBag
{

    /**
     * @var array
     */
    private $props = [];

    public function __construct(array $props=[])
    {
        $this->props = $props;
    }

    /**
     * Add a property value, fails if the property exists
     * 
     * @param string $prop Property name
     * @param mixed $value Value
     * @throws PropertyException if the property already exists
     */
    public function add(string $prop, $value)
    {
        if (array_key_exists($prop, $this->props)) {
            throw new PropertyException("Property already exists");
        }
        $this->props[$prop] = $value;
    }

    /**
     * Set a property value, create the property if it doesn't
     * exist.
     * 
     * @param string $prop Property name
     * @param mixed $value Value
     */
    public function set(string $prop, $value)
    {
        $this->props[$prop] = $value;
    }

    /**
     * Apply properties without removing anything.
     * 
     * @param array $props The properties to apply
     */
    public function setAll(array $props)
    {
        $this->props = array_merge(
            $this->props,
            $props
        );
    }

    /**
     * Get the value of a property, fails if the property does not exist.
     * Use the value() method to get with a default value
     * 
     * @param string $prop Property name
     * @return mixed
     * @throws PropertyException if the property does not exist
     */
    public function get(string $prop)
    {
        if (!array_key_exists($prop, $this->props)) {
            throw new PropertyException("No such property");
        }
        return $this->props[$prop];
    }

    /**
     * Retrieve all properties.
     * 
     * @return array
     */
    public function getAll(): array
    {
        return $this->props;
    }

    /**
     * Retrieve all properties as a json string
     * 
     * @return string
     */
    public function getJson(): string
    {
        return json_encode($this->props, JSON_UNESCAPED_SLASHES);
    }

    /**
     * Get the value of the property, or use the provided default value.
     * 
     * @param string $prop Property name
     * @param mixed|null $default Default value
     * @return mixed
     */
    public function valueOf(string $prop, $default=null)
    {
        return array_key_exists($prop, $this->props)
            ? $this->props[$prop]
            : $default;
    }

    /**
     * Remove a property
     * 
     * @param string $prop Property name
     */
    public function delete(string $prop)
    {
        unset($this->props[$prop]);
    }

    /**
     * Check if a property is present
     * 
     * @param string $prop Property name
     */
    public function has(string $prop): bool
    {
        return array_key_exists($prop, $this->props);
    }

    /**
     * Check if all the provided properties are present
     * 
     * @param array $props Property names
     */
    public function hasAll(array $props)
    {
        foreach ($props as $prop) {
            if (!$this->has($prop)) return false;
        }
        return true;
    }

}