<?php

namespace NoccyLabs\Juicer\Recipe\Importer;

use NoccyLabs\Juicer\Recipe\RecipeInterface;
use NoccyLabs\Juicer\Recipe\Recipe;
use NoccyLabs\Juicer\Ingredient\Ingredient;

/**
 * Import recipes from Json
 * 
 */
class JsonImporter
{

    /**
     * Import a recipe from json
     * 
     * @param string The json string to parse and import
     * @return RecipeInterface
     */
    public function import(string $json): RecipeInterface
    {
        $data = json_decode($json);

        $recipe = new Recipe();
        $recipe->setRecipeName(@$data->recipe);
        $recipe->setRecipeAuthor(@$data->author);
        $recipe->setDescription(@$data->description);
        $recipe->setExtra((array)@$data->extra);

        foreach ((array)@$data->ingredients as $ingredientData) {
            $ingredient = new Ingredient($ingredientData->flavor, $ingredientData->brand, $ingredientData->percent);
            $recipe->addIngredient($ingredient);
        }

        return $recipe;
    }

    /**
     * Import a recipe from json contained in a file
     * 
     * @param string The filename to read and import
     * @return RecipeInterface
     */
    public function readFromFile(string $filename): RecipeInterface
    {
        $fd = fopen($filename, "r");
        if (!$fd) {
            throw new \InvalidArgumentException();
        }
        $json = fread($fd, filesize($filename));
        fclose($fd);

        return $this->import($json);
    }

}