<?php

$json = '{
  "code": 0,
  "status": "200 OK",
  "message": "Success.",
  "data": {
    "lang": "sk",
    "enums": []
  }
}'; 

$decoded = json_decode($json);

$fixedRules = array(
    "state" => "</font><font color='green'>ENUM</font> (ACTIVE | DISABLED | ARCHIVED | DELETED)",
    "description" =>  "<font color='green'>STRING</font>"
);

processJson($decoded, 0, $fixedRules);

function processJson($data, $step = 0, $fixedRules) {
    if ($step === 0) {
        for ($i = 0; $i < $step + 1; $i++) {
            echo "&emsp; ";
        }
    }
    if (is_array($data)) {
        echo "&lbrack;<br>";
    } else {
        echo "&lbrace;<br>";
    }
    echo "\n";
    foreach ($data as $key => $val) {
        for ($i = 0; $i < $step + 2; $i++) {
            echo "&emsp; ";
        }
        if (is_object($val) || is_array($val)) {
            echo "<font color='blue'>";
            if (!is_numeric($key)) {
                echo $key . ": ";
            }
            echo "</font>";
            processJson($val, $step + 1, $fixedRules);
        } else {
           
                echo "<font color='blue'>";
                if (!is_numeric($key)) {
                    echo $key;
                    echo ": ";
                }
                echo "</font>";
                 if (key_exists($key, $fixedRules)) {
                echo $fixedRules[$key];
            } else {
                echo "<font color='green'>";
                if (is_numeric($val)) {
                    echo "INTEGER";
                } else if (is_date($val)) {
                    echo "DATETIME";
                } else {
                    echo strtoupper(gettype($val));
                }
                echo "</font>";
            }
            echo "\n";
            echo "<br>";
            echo "\n";
        }
    }

    for ($i = 0; $i < $step + 1; $i++) {
        echo "&emsp; ";
    }
    if (is_array($data)) {
        echo "&rbrack;<br>";
    } else {
        echo "&rbrace;<br>";
    }
}

function is_date($x) {
    if ($x === true || $x === false) {
        return false;
    }
    return (date('Y-m-d H:i:s', strtotime($x)) == $x);
}