'use strict';
var fs = require('graceful-fs');
var path = require('path');
var test = require('tap').test;
var rimraf = require('rimraf');
var writeStream = require('../index.js');

var target = path.resolve(__dirname, 'test-rename-eperm1');
var target2 = path.resolve(__dirname, 'test-rename-eperm2');
var target3 = path.resolve(__dirname, 'test-rename-eperm3');

test('rename eperm none existing file', function(t) {
  t.plan(2);

  var _rename = fs.rename;
  fs.existsSync = function(src) {
    return true;
  };
  fs.rename = function(src, dest, cb) {
    // simulate a failure during rename where the file
    // is renamed successfully but the process encounters
    // an EPERM error and the target file does not exist
    _rename(src, dest, function(e) {
      var err = new Error('TEST BREAK');
      err.syscall = 'rename';
      err.code = 'EPERM';
      cb(err);
    });
  };

  var stream = writeStream(target, {isWin: true});
  var hadError = false;
  var calledFinish = false;
  stream.on('error', function(er) {
    hadError = true;
    console.log('#', er);
  });
  stream.on('finish', function() {
    calledFinish = true;
  });
  stream.on('close', function() {
    t.is(hadError, true, 'error was caught');
    t.is(calledFinish, false, 'finish was called before close');
  });
  stream.end();
});

// test existing file with diff. content
test('rename eperm existing file different content', function(t) {
  t.plan(2);

  var _rename = fs.rename;
  fs.existsSync = function(src) {
    return true;
  };
  fs.rename = function(src, dest, cb) {
    // simulate a failure during rename where the file
    // is renamed successfully but the process encounters
    // an EPERM error and the target file that has another content than the
    // destination
    _rename(src, dest, function(e) {
      fs.writeFile(src, 'dest', function(writeErr) {
        if (writeErr) {
          return console.log('WRITEERR: ' + writeErr);
        }

        fs.writeFile(target2, 'target', function(writeErr) {
          if (writeErr) {
            return console.log('WRITEERR: ' + writeErr);
          }

          var err = new Error('TEST BREAK');
          err.syscall = 'rename';
          err.code = 'EPERM';
          cb(err);
        });
      });
    });
  };

  var stream = writeStream(target2, {isWin: true});
  var hadError = false;
  var calledFinish = false;
  stream.on('error', function(er) {
    hadError = true;
    console.log('#', er);
  });
  stream.on('finish', function() {
    calledFinish = true;
  });
  stream.on('close', function() {
    t.is(hadError, true, 'error was caught');
    t.is(calledFinish, false, 'finish was called before close');
  });
  stream.end();
});

// test existing file with the same content
// test existing file with diff. content
test('rename eperm existing file different content', function(t) {
  t.plan(2);

  var _rename = fs.rename;
  fs.existsSync = function(src) {
    return true;
  };
  fs.rename = function(src, dest, cb) {
    // simulate a failure during rename where the file
    // is renamed successfully but the process encounters
    // an EPERM error and the target file that has the same content than the
    // destination
    _rename(src, dest, function(e) {
      fs.writeFile(src, 'target2', function(writeErr) {
        if (writeErr) {
          return console.log('WRITEERR: ' + writeErr);
        }

        fs.writeFile(target3, 'target2', function(writeErr) {
          if (writeErr) {
            return console.log('WRITEERR: ' + writeErr);
          }

          var err = new Error('TEST BREAK');
          err.syscall = 'rename';
          err.code = 'EPERM';
          cb(err);
        });
      });
    });
  };

  var stream = writeStream(target3, {isWin: true});
  var hadError = false;
  var calledFinish = false;
  stream.on('error', function(er) {
    hadError = true;
    console.log('#', er);
  });
  stream.on('finish', function() {
    calledFinish = true;
  });
  stream.on('close', function() {
    t.is(hadError, false, 'error was caught');
    t.is(calledFinish, true, 'finish was called before close');
  });
  stream.end();
});

test('cleanup', function(t) {
  rimraf.sync(target);
  rimraf.sync(target2);
  rimraf.sync(target3);
  t.end();
});