var _d = console.log.bind( console, 'dbg: ' );
var fs = require('fs');

function DescribeBlock( parentBlock ){
  _d( 'DescribeBlock:init', parentBlock );
  this.parent = parentBlock;
  if( parentBlock ){
    parentBlock.addChild( this );
  }

  this.children = [];
  this.its = [];
  this.beforeEach = null;
  this.afterEach = null;
}

DescribeBlock.prototype.addChild = function( child ){
  this.children.push( child );
};




function SimpleMocha(){
  
  this.describe             = this.describe.bind( this );
  this.it                   = this.it.bind( this );
  this.before               = this.before.bind( this );
  this.after                = this.after.bind( this );
  this.beforeEach           = this.beforeEach.bind( this );
  this.afterEach            = this.afterEach.bind( this );

  this.rootDescribeBlock    = new DescribeBlock();
  this.currentDescribeBlock = this.rootDescribeBlock;
}

SimpleMocha.prototype.describe   = function( description, fn ){
  var parentDescribeBlock = this.currentDescribeBlock;
  var thisDescribeBlock = new DescribeBlock( parentDescribeBlock );

  this.currentDescribeBlock = thisDescribeBlock;
  fn();
  this.currentDescribeBlock = parentDescribeBlock;
};

SimpleMocha.prototype.it         = function(){};
SimpleMocha.prototype.before     = function( fn ){
  this.currentDescribeBlock.beforeFn = fn;
};

SimpleMocha.prototype.after      = function(){};
SimpleMocha.prototype.beforeEach = function(){};
SimpleMocha.prototype.afterEach  = function(){};


SimpleMocha.DescribeBlock = DescribeBlock;


SimpleMocha.load = function( fileName ){
  var sm = new SimpleMocha();
  var describe    = sm.describe;
  var it          = sm.it;
  var before      = sm.before;
  var after       = sm.after;
  var beforeEach  = sm.after;
  var afterEach   = sm.after;

  var code = fs.readFileSync( fileName, 'utf-8' );

  eval( code );
  
  return sm;
};



module.exports = SimpleMocha;