(function (Prism) {
  Prism.languages.smarty = {
    comment: {
      pattern: /^\{\*[\s\S]*?\*\}/,
      greedy: true,
    },
    'embedded-php': {
      pattern: /^\{php\}[\s\S]*?\{\/php\}/,
      greedy: true,
      inside: {
        smarty: {
          pattern: /^\{php\}|\{\/php\}$/,
          inside: null, // see below
        },
        php: {
          pattern: /[\s\S]+/,
          alias: 'language-php',
          inside: Prism.languages.php,
        },
      },
    },
    string: [
      {
        pattern: /"(?:\\.|[^"\\\r\n])*"/,
        greedy: true,
        inside: {
          interpolation: {
            pattern: /\{[^{}]*\}|`[^`]*`/,
            inside: {
              'interpolation-punctuation': {
                pattern: /^[{`]|[`}]$/,
                alias: 'punctuation',
              },
              expression: {
                pattern: /[\s\S]+/,
                inside: null, // see below
              },
            },
          },
          variable: /\$\w+/,
        },
      },
      {
        pattern: /'(?:\\.|[^'\\\r\n])*'/,
        greedy: true,
      },
    ],
    keyword: {
      pattern: /(^\{\/?)[a-z_]\w*\b(?!\()/i,
      lookbehind: true,
      greedy: true,
    },
    delimiter: {
      pattern: /^\{\/?|\}$/,
      greedy: true,
      alias: 'punctuation',
    },
    number: /\b0x[\dA-Fa-f]+|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:[Ee][-+]?\d+)?/,
    variable: [
      /\$(?!\d)\w+/,
      /#(?!\d)\w+#/,
      {
        pattern: /(\.|->|\w\s*=)(?!\d)\w+\b(?!\()/,
        lookbehind: true,
      },
      {
        pattern: /(\[)(?!\d)\w+(?=\])/,
        lookbehind: true,
      },
    ],
    function: {
      pattern: /(\|\s*)@?[a-z_]\w*|\b[a-z_]\w*(?=\()/i,
      lookbehind: true,
    },
    'attr-name': /\b[a-z_]\w*(?=\s*=)/i,
    boolean: /\b(?:false|no|off|on|true|yes)\b/,
    punctuation: /[\[\](){}.,:`]|->/,
    operator: [
      /[+\-*\/%]|==?=?|[!<>]=?|&&|\|\|?/,
      /\bis\s+(?:not\s+)?(?:div|even|odd)(?:\s+by)?\b/,
      /\b(?:and|eq|gt?e|gt|lt?e|lt|mod|neq?|not|or)\b/,
    ],
  };

  Prism.languages.smarty['embedded-php'].inside.smarty.inside =
    Prism.languages.smarty;
  Prism.languages.smarty.string[0].inside.interpolation.inside.expression.inside =
    Prism.languages.smarty;

  var string = /"(?:\\.|[^"\\\r\n])*"|'(?:\\.|[^'\\\r\n])*'/;
  var smartyPattern = RegExp(
    // comments
    /\{\*[\s\S]*?\*\}/.source +
      '|' +
      // php tags
      /\{php\}[\s\S]*?\{\/php\}/.source +
      '|' +
      // smarty blocks
      /\{(?:[^{}"']|<str>|\{(?:[^{}"']|<str>|\{(?:[^{}"']|<str>)*\})*\})*\}/.source.replace(
        /<str>/g,
        function () {
          return string.source;
        }
      ),
    'g'
  );

  // Tokenize all inline Smarty expressions
  Prism.hooks.add('before-tokenize', function (env) {
    var smartyLiteralStart = '{literal}';
    var smartyLiteralEnd = '{/literal}';
    var smartyLiteralMode = false;

    Prism.languages['markup-templating'].buildPlaceholders(
      env,
      'smarty',
      smartyPattern,
      function (match) {
        // Smarty tags inside {literal} block are ignored
        if (match === smartyLiteralEnd) {
          smartyLiteralMode = false;
        }

        if (!smartyLiteralMode) {
          if (match === smartyLiteralStart) {
            smartyLiteralMode = true;
          }

          return true;
        }
        return false;
      }
    );
  });

  // Re-insert the tokens after tokenizing
  Prism.hooks.add('after-tokenize', function (env) {
    Prism.languages['markup-templating'].tokenizePlaceholders(env, 'smarty');
  });
})(Prism);