'use strict';

var chai = chai || require('chai');
var bitcore = bitcore || require('../bitcore');
var buffertools = require('buffertools');

var should = chai.should();
var testdata = testdata || require('./testdata');

var ScriptInterpreterModule = bitcore.ScriptInterpreter;
var Script = bitcore.Script;
var ScriptInterpreter;

describe('ScriptInterpreter', function() {
  it('should initialze the main object', function() {
    should.exist(ScriptInterpreterModule);
  });
  it('should be able to create class', function() {
    ScriptInterpreter = ScriptInterpreterModule;
    should.exist(ScriptInterpreter);
  });
  it('should be able to create instance', function() {
    var si = new ScriptInterpreter();
    should.exist(si);
  });
  var testScripts = function(data, valid) {
    var i = 0;
    data.forEach(function(datum) {
      if (datum.length < 2) throw new Error('Invalid test data');
      var scriptSig = datum[0]; // script inputs
      var scriptPubKey = datum[1]; // output script
      var human = scriptSig + ' ' + scriptPubKey;
      it('should ' + (!valid ? 'not ' : '') + 'validate script ' + human, function(done) {
        console.log((!valid ? 'invalid ' : 'valid ') + human + ';' + (i++) + ' - ' + datum[2]);
        try {
          ScriptInterpreter.verify(
            Script.fromHumanReadable(scriptSig),
            Script.fromHumanReadable(scriptPubKey),
            null, 0, 0, // tx, output index, and hashtype
            function(err, result) {
              if (valid) {
                should.not.exist(err);
              } else {
                var failed = (typeof err !== 'undefined') || (result === false);
                console.log('err=' + err);
                console.log('result=' + result);
                failed.should.equal(true);
              }
              if (typeof result !== 'undefined') {
                result.should.equal(valid);
              }
              done();
            }
          );
        } catch (e) {
          if (valid) {
            console.log(e);
          }
          valid.should.equal(false);
          done();
        }

      });
    });
  };
  testScripts(testdata.dataScriptValid, true);
  testScripts(testdata.dataScriptInvalid, false);



  testdata.dataSigCanonical.forEach(function(datum) {
    it('should validate valid canonical signatures', function() {
      ScriptInterpreter.isCanonicalSignature(new Buffer(datum, 'hex')).should.equal(true);
    });
  });
  testdata.dataSigNonCanonical.forEach(function(datum) {
    it('should NOT validate invalid canonical signatures', function() {
      var sig;
      var isHex;
      //is Hex?
      try {
        sig = new Buffer(datum, 'hex');
        isHex = 1;
      } catch (e) {}

      if (isHex)
        ScriptInterpreter.isCanonicalSignature.bind(sig).should.
      throw ();
    });
  });


});