var grunt = require('grunt');
var fs = require('fs');
var gruntTextReplace = require('../lib/grunt-text-replace');


var replaceText = function (text, from, to) {
  return gruntTextReplace.replaceText({
    text: text,
    replacements: [{
      from: from,
      to: to
    }]
  });
};

var replaceTextMultiple = function (text, replacements) {
  return gruntTextReplace.replaceText({
    text: text,
    replacements: replacements
  });
};

var replaceFile = function (pathToSourceFile, pathToDestinationFile, replacements) {
  return gruntTextReplace.replaceFile({
    src: pathToSourceFile,
    dest: pathToDestinationFile,
    replacements: replacements
  });
};

var replaceFileMultiple = function (sourceFiles, destinationDirectory, replacements) {
  return gruntTextReplace.replaceFileMultiple({
    src: sourceFiles,
    dest: destinationDirectory,
    replacements: replacements
  });
};


exports.textReplace = {
  'Test core replacement functionality': {
    'Test string replacements': function (test) {
      test.equal(replaceText('Hello world', 'Hello', 'Goodbye'), 'Goodbye world');
      test.notEqual(replaceText('Hello w000rld', 'w0*rld', 'world'), 'Hello world');
      test.equal(replaceText('Hello (*foo.)', '(*foo.)', 'world'), 'Hello world');
      test.equal(replaceText('Hello \\foo', '\\', ''), 'Hello foo');
      test.equal(replaceText('Foo bar bar', 'bar', 'foo'), 'Foo foo foo');
      test.equal(replaceText('Foo bar bar', 'bar', 'Foo bar'), 'Foo Foo bar Foo bar');
      test.done();
    },

    'Test regex replacements': function (test) {
      test.equal(replaceText('Hello world', /Hello/, 'Goodbye'), 'Goodbye world');
      test.equal(replaceText('Hello world', /(Hello) (world)/, '$2 $1'), 'world Hello');
      test.equal(replaceText('Foo bar bar', /bar/, 'foo'), 'Foo foo bar');
      test.equal(replaceText('Foo bar bar', /bar/g, 'foo'), 'Foo foo foo');
      test.done();
    },

    'Test grunt.template replacements': function (test) {
      test.equal(replaceText('Hello world', 'world',
        '<%= grunt.template.date("20 Nov 2012 11:30:00 GMT", "dd/mm/yy") %>'), 'Hello 20/11/12');
      test.done();
    },

    'Test function replacements': function (test) {
      test.equal(replaceText('Hello world', 'world',
        function (matchedWord, index, fullText, regexMatches) {
          return new Array(4).join(matchedWord);
        }), 'Hello worldworldworld');
      test.equal(replaceText('Hello world', 'world',
        function (matchedWord, index, fullText, regexMatches) {
          return index;
        }), 'Hello 6');
      test.equal(replaceText('Hello world', 'Hello',
        function (matchedWord, index, fullText, regexMatches) {
          return index;
        }), '0 world');
      test.equal(replaceText('Hello world', 'foo',
        function (matchedWord, index, fullText, regexMatches) {
          return index;
        }), 'Hello world');
      test.equal(replaceText('Hello world', 'world',
        function (matchedWord, index, fullText, regexMatches) {
          return fullText;
        }), 'Hello Hello world');
      test.equal(replaceText('Hello world', /(Hello) (world)/g,
        function (matchedWord, index, fullText, regexMatches) {
          return 'Place: ' + regexMatches[1] + ', Greeting: ' + regexMatches[0];
        }), 'Place: world, Greeting: Hello');
      test.equal(replaceText('Hello world', /(Hello) (world)/g,
        function (matchedWord, index, fullText, regexMatches) {
          return regexMatches[0] + ' <%= grunt.template.date("20 Nov 2012 11:30:00 GMT", "dd/mm/yy") %>';
        }), 'Hello 20/11/12');
      test.done();
    },

    'Test non string or function "to" replacements': function (test) {
      test.equal(replaceText('Hello 0 true 1 false 2345', 'true', false), 'Hello 0 false 1 false 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', 'false', true), 'Hello 0 true 1 true 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', '1', 22), 'Hello 0 true 22 false 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', '0', 1), 'Hello 1 true 1 false 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', /true|false/g, 0), 'Hello 0 0 1 0 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', 'Hello', 1e5), '100000 0 true 1 false 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', 'Hello', null), ' 0 true 1 false 2345');
      test.equal(replaceText('Hello 0 true 1 false 2345', 'true', undefined), 'Hello 0  1 false 2345');
      test.done();
    },

    'Test multiple replacements': function (test) {
      test.equal(replaceTextMultiple('Hello world',
        [{
          from: 'Hello',
          to: 'Hi'
        }, {
          from: 'world',
          to: 'planet'
        }]), 'Hi planet');
      test.done();
    }
  },

  'Test file handling': {
    setUp: function (done) {
      grunt.file.copy('test/text_files/test.txt', 'test/temp/testA.txt');
      grunt.file.copy('test/text_files/test.txt', 'test/temp/testB.txt');
      done();
    },

    tearDown: function (done) {
      fs.unlinkSync('test/temp/testA.txt');
      fs.unlinkSync('test/temp/testB.txt');
      fs.rmdirSync('test/temp');
      done();
    },

    'Test change to file specifying destination file': function (test) {
      var originalText, replacedText;
      originalText = grunt.file.read('test/temp/testA.txt');
      replaceFile('test/temp/testA.txt', 'test/temp/testA.txt', [{from: 'world', to: 'planet'}]);
      replacedText = grunt.file.read('test/temp/testA.txt');
      test.equal(originalText, 'Hello world');
      test.equal(replacedText, 'Hello planet');
      test.done();
    },

    'Test change to file specifying destination directory': function (test) {
      var originalText, replacedText;
      originalText = grunt.file.read('test/temp/testA.txt');
      replaceFile('test/temp/testA.txt', 'test/temp/', [{from: 'world', to: 'planet'}]);
      replacedText = grunt.file.read('test/temp/testA.txt');
      test.equal(originalText, 'Hello world');
      test.equal(replacedText, 'Hello planet');
      test.done();
    },

    'Test change to multiple files specifying paths': function (test) {
      var originalText, replacedTextA, replacedTextB;
      originalText = grunt.file.read('test/temp/testA.txt');
      replaceFileMultiple(['test/temp/testA.txt', 'test/temp/testB.txt'], 'test/temp/', [{from: 'world', to: 'planet'}]);
      replacedTextA = grunt.file.read('test/temp/testA.txt');
      replacedTextB = grunt.file.read('test/temp/testB.txt');
      test.equal(originalText, 'Hello world');
      test.equal(replacedTextA, 'Hello planet');
      test.equal(replacedTextB, 'Hello planet');
      test.done();
    },

    'Test change to multiple files specifying minimatch paths': function (test) {
      var originalText, replacedTextA, replacedTextB;
      originalText = grunt.file.read('test/temp/testA.txt');
      replaceFileMultiple(['test/temp/test*.txt'], 'test/temp/', [{from: 'world', to: 'planet'}]);
      replacedTextA = grunt.file.read('test/temp/testA.txt');
      replacedTextB = grunt.file.read('test/temp/testB.txt');
      test.equal(originalText, 'Hello world');
      test.equal(replacedTextA, 'Hello planet');
      test.equal(replacedTextB, 'Hello planet');
      test.done();
    }

  }
};