'use strict';

var helpers = require('../helpers');

module.exports = {
  'name': 'space-between-parens',
  'defaults': {
    'include': false
  },
  'detect': function (ast, parser) {
    var result = [];

    ast.traverseByType('arguments', function (args) {
      var first = args.first(),
          last = args.last();

      if (args.length === 0) {
        return;
      }

      if (parser.options.include) {
        if (!first.is('space')) {
          result = helpers.addUnique(result, {
            'ruleId': parser.rule.name,
            'line': first.start.line,
            'column': first.start.column - 1,
            'message': 'Space expected at beginning of parenthesis',
            'severity': parser.severity
          });
        }
        if (!last.is('space')) {
          result = helpers.addUnique(result, {
            'ruleId': parser.rule.name,
            'line': last.end.line,
            'column': last.end.column,
            'message': 'Space expected at end of parenthesis',
            'severity': parser.severity
          });
        }
      }
      else {
        // Ignore if arguments are multi-line
        if (first.is('space') && !helpers.hasEOL(first.content)) {
          result = helpers.addUnique(result, {
            'ruleId': parser.rule.name,
            'line': first.start.line,
            'column': first.start.column,
            'message': 'No space allowed at beginning of parenthesis',
            'severity': parser.severity
          });
        }
        if (last.is('space')) {
          // Proceed if arguments aren't multi-line.
          // With Sass we have one extra check for nested nodes where we must
          // check doublePrevious as the last node will be the indentation
          if (
            (ast.syntax === 'scss' && !helpers.hasEOL(last.content))
            || (ast.syntax === 'sass' && !helpers.hasEOL(last.content) && !helpers.hasEOL(args.content[args.content.length - 2].content))
          ) {
            result = helpers.addUnique(result, {
              'ruleId': parser.rule.name,
              'line': last.start.line,
              'column': last.start.column,
              'message': 'No space allowed at end of parenthesis',
              'severity': parser.severity
            });
          }
        }
      }
    });

    return result;
  }
};