jison = (require 'jison')


grammar=
  lex: 
    "rules": [
       ["\\s+",                     "/* skip whitespace */"],
       ["H:",                       "return 'H:';"],
       ["V:",                       "return 'V:';"],
       ["@",                        "return '@';"],
       ["-",                        "return '-';"],
       ["\\|",                      "return '|';"],
       ["\\[",                      "return '[';"],
       ["]",                        "return ']';"],
       ["\\(",                      "return '(';"],
       ["\\)",                      "return ')';"],
       ["==",                       "return '==';"],
       [">=",                       "return '>=';"],
       ["<=",                       "return '<=';"],
       [",",                        "return ',';"],
       ["$",                        "return 'EOF';"]
       ["[0-9]+(?:\\.[0-9]+)?\\b",  "return 'NUMBER';"],
       ["[_A-Za-z][_A-Za-z0-9]*\\b","return 'IDENTIFIER';"],
    ]
  startSymbol: "visualFormatString", 
  bnf:
    'visualFormatString': [
      ['orientation left_connection_to_superview view more_connections', 
            """
            /* create Solver */
            $$ = [$1,$3,$2,$4 ];
            //console.log($$);
            return $$;
            """
      ]
    ]
    'orientation': [
      ['',  """
            /* x and width */
            $$ = ['orientation', 'x'];
            """] 
      ['H:',"""
            /* x and width */
            $$ = ['orientation', 'x'];
            """] 
      ['V:',"""
            /* y and height */
            $$ = ['orientation', 'y'];
            """]
    ]
    'view': [
      ['[ viewName predicateListWithParens ]', 
            """
            /* find morph viewName and add Constraints */
            //console.log('viewName = ' + $2);
            //console.log('predicates = ' + $3);
            $$ = ['view',$2,$3];
            """]
    ]
    
    'left_connection_to_superview' : [
      ['', """
           /* no constraint */
           $$ = 'no_left_superview_connect';
           """]
      ['| connection', 
           """
           /* connect to superview */
           $$ = ['left_superview_connect', $2];
           """]
    ]
    
    'more_connections': [
      ['EOF', """
              $$ = ['no more connections'];
              """],
      ['right_connection_to_superview',
              """
              $$ = $1;
              """]
      ['connection_to_view',
              """
              //console.log('connection_to_view = ' + $1);
              $$ = $1;
              """]
    ]
    
    'right_connection_to_superview' : [
      ['connection | EOF', """
                           /* connect to superview */
                           $$ = ['right_superview_connect', $1];
                           """]
    ]
    
    'connection_to_view': [
      ['connection view ', 
                """
                /* should add both, connection and view constraints */
                $$ = ['connection_to_view', $1, $2];
                """]
      ['connection view more_connections', 
                """
                /* should add both, connection and view constraints */
                $$ = ['connection_to_view', $1, $2, $3];
                """]
    ]

    'connection': [
      ['', """
           /* space equals 0 */
           $$ = ['connection_no_space']; 
           """]
      ['-', """
            /* default space constraints */
            $$ = ['connection_default'];
            """]
      ['- predicateList -', 
            """
            /* connection has predicateList constraints */
            $$ = ['connection_with_predicates', $2];
            """]
    ] 
    
    'predicateList': [
      ['simplePredicate',
          """
          $$ = [$1];
          """]
      ['predicateListWithParens',
          """
          $$ = [$1];
          """]
    ]
    'simplePredicate': [
      ['metricName',
          """
          $$ = [$1];
          """]
      ['number',
          """
          $$ = [$1];
          """] 
    ]
    'predicateListWithParens': [
      ['', """
           /* no predicates */
           $$ = ['predicates_no'];
           """] 
      ['( predicate more_predicates )', 
           """
           /* predicate */
           $$ = ['predicate',$2, $3];
           """]
    ]
    'more_predicates':[
      ['', 
          """
          $$ = '.';
          """]
      [', predicate more_predicates', 
          """
          $$ = $2;
          """]
    ]
    'predicate': [
      ['objectOfPredicate', 
                """
                $$ = ['obj_of_predicate', $1];
                """]
      ['relation objectOfPredicate', 
                """
                $$ = ['rel_and_obj', $1, $2];
                """] 
      ['objectOfPredicate @ priority',
                """
                $$ = ['obj_at_priority',$1,$3];
                """] 
      ['relation objectOfPredicate @ priority',
                """
                $$ = ['rel_and_obj_at_priority', $1, $2, $4];
                """]
    ]
    
    'relation': [
      ['==',"""
            /* equal*/
            $$ = '==';
            """]
      ['<=',"""
            /* greater or equal*/
            $$ = '<=';
            """]

      ['>=',"""
            /* greater or equal*/
            $$ = '>='; 
            """]
    ]

    'objectOfPredicate': [
      ['constant',""" $$ = ['obj_of_predicate', 'constant', $1]; """]
      ['viewName',""" $$ = ['obj_of_predicate', 'viewname', $1]; """]
    ]
    'priority': [
      ['metricName',""" $$ = [$1]; """]
      ['number', """ $$ = [$1]; """]
    ]
    'constant': [
      ['metricName',""" $$ = [$1]; """] 
      ['number',""" $$ = [$1]; """]
    ]
    'viewName': [
      ['IDENTIFIER', """
                      $$ = yytext;
                      //console.log(yytext);
                      """]
    ]
    'number'  : [
      ['NUMBER', 
                """
                $$ = yytext; /*number*/
                //console.log(yytext);
                """]
    ]

###
    <viewName>
    Parsed as a C identifier.
    This must be a key mapping to an instance of NSView in the passed views dictionary.

    <metricName>
    Parsed as a C identifier. This must be a key mapping to an instance of NSNumber in the passed metrics dictionary.

    <number>
    As parsed by strtod_l, with the C locale.
###


    
fs = require('fs')

parser = new jison.Parser(grammar)
parserSource = parser.generate({moduleName: "VFParser"})
fs.writeFileSync('visual-format-parser.js',parserSource, encoding='utf8')
#console.log parserSource

#console.log parser
#parser.parse '[button]'
#parser.parse '[button]-[textfield]'
#parser.parse '|-[button]-|'
#parser.parse '|[button]|'
#parser.parse '|-[button (>= 50) ]-|'
#parser.parse '|-50-[orchidbox]-50-|'
#parser.parse 'V:[topField]-10-[bottomField]'
#parser.parse '[maroonView][oceanView]'
#parser.parse '[button(100@20)]'
#parser.parse '[button1(==button2)]'
#parser.parse '[flexibleButton(>=70,<=100)]'
#parser.parse '|-[find]-[findNext]-[findField(>=20)]'
#parser.parse '|-[a]-[b]-[c]-|'
#eval parserSource

console.log parser.parse('|-[a]-[b(==a)]-[c(==b)]-|')

# debug
#fs.writeFileSync('./js/example.json',(JSON.stringify ast), encoding='utf8')