/*
 * synergy -- mouse and keyboard sharing utility
 * Copyright (C) 2012-2016 Symless Ltd.
 * Copyright (C) 2011 Nick Bolton
 *
 * This package is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * found in the file LICENSE that should have accompanied this file.
 *
 * This package is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "synergy/Clipboard.h"

#include <gtest/gtest.h>

TEST(ClipboardTests, empty_openCalled_returnsTrue) {
  Clipboard clipboard;
  clipboard.open(0);

  bool actual = clipboard.empty();

  EXPECT_EQ(true, actual);
}

TEST(ClipboardTests, empty_singleFormat_hasReturnsFalse) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(Clipboard::kText, "synergy rocks!");

  clipboard.empty();

  bool actual = clipboard.has(Clipboard::kText);
  EXPECT_FALSE(actual);
}

TEST(ClipboardTests, add_newValue_valueWasStored) {
  Clipboard clipboard;
  clipboard.open(0);

  clipboard.add(IClipboard::kText, "synergy rocks!");

  String actual = clipboard.get(IClipboard::kText);
  EXPECT_EQ("synergy rocks!", actual);
}

TEST(ClipboardTests, add_replaceValue_valueWasReplaced) {
  Clipboard clipboard;
  clipboard.open(0);

  clipboard.add(IClipboard::kText, "synergy rocks!");
  clipboard.add(IClipboard::kText, "maxivista sucks"); // haha, just kidding.

  String actual = clipboard.get(IClipboard::kText);
  EXPECT_EQ("maxivista sucks", actual);
}

TEST(ClipboardTests, open_timeIsZero_returnsTrue) {
  Clipboard clipboard;

  bool actual = clipboard.open(0);

  EXPECT_EQ(true, actual);
}

TEST(ClipboardTests, open_timeIsOne_returnsTrue) {
  Clipboard clipboard;

  bool actual = clipboard.open(1);

  EXPECT_EQ(true, actual);
}

TEST(ClipboardTests, close_isOpen_noErrors) {
  Clipboard clipboard;
  clipboard.open(0);

  clipboard.close();

  // can't assert anything
}

TEST(ClipboardTests, getTime_openWithNoEmpty_returnsZero) {
  Clipboard clipboard;
  clipboard.open(1);

  Clipboard::Time actual = clipboard.getTime();

  EXPECT_EQ(0, actual);
}

TEST(ClipboardTests, getTime_openAndEmpty_returnsOne) {
  Clipboard clipboard;
  clipboard.open(1);
  clipboard.empty();

  Clipboard::Time actual = clipboard.getTime();

  EXPECT_EQ(1, actual);
}

TEST(ClipboardTests, has_withFormatAdded_returnsTrue) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks!");

  bool actual = clipboard.has(IClipboard::kText);

  EXPECT_EQ(true, actual);
}

TEST(ClipboardTests, has_withNoFormats_returnsFalse) {
  Clipboard clipboard;
  clipboard.open(0);

  bool actual = clipboard.has(IClipboard::kText);

  EXPECT_FALSE(actual);
}

TEST(ClipboardTests, get_withNoFormats_returnsEmpty) {
  Clipboard clipboard;
  clipboard.open(0);

  String actual = clipboard.get(IClipboard::kText);

  EXPECT_EQ("", actual);
}

TEST(ClipboardTests, get_withFormatAdded_returnsExpected) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks!");

  String actual = clipboard.get(IClipboard::kText);

  EXPECT_EQ("synergy rocks!", actual);
}

TEST(ClipboardTests, marshall_addNotCalled_firstCharIsZero) {
  Clipboard clipboard;

  String actual = clipboard.marshall();

  // seems to return "\0\0\0\0" but EXPECT_EQ can't assert this,
  // so instead, just assert that first char is '\0'.
  EXPECT_EQ(0, (int)actual[0]);
}

TEST(ClipboardTests, marshall_withTextAdded_typeCharIsText) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks!");
  clipboard.close();

  String actual = clipboard.marshall();

  // string contains other data, but 8th char should be kText.
  EXPECT_EQ(IClipboard::kText, (int)actual[7]);
}

TEST(ClipboardTests, marshall_withTextAdded_lastSizeCharIs14) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks!"); // 14 chars
  clipboard.close();

  String actual = clipboard.marshall();

  EXPECT_EQ(14, (int)actual[11]);
}

// TODO: there's some integer -> char encoding going on here. i find it
// hard to believe that the clipboard is the only thing doing this. maybe
// we should refactor this stuff out of the clipboard.
TEST(ClipboardTests, marshall_withTextSize285_sizeCharsValid) {
  // 285 chars
  String data;
  data.append("Synergy is Free and Open Source Software that lets you ");
  data.append("easily share your mouse and keyboard between multiple ");
  data.append("computers, where each computer has it's own display. No ");
  data.append("special hardware is required, all you need is a local area ");
  data.append("network. Synergy is supported on Windows, Mac OS X and Linux.");

  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, data);
  clipboard.close();

  String actual = clipboard.marshall();

  // 4 asserts here, but that's ok because we're really just asserting 1
  // thing. the 32-bit size value is split into 4 chars. if the size is 285
  // (29 more than the 8-bit max size), the last char "rolls over" to 29
  // (this is caused by a bit-wise & on 0xff and 8-bit truncation). each
  // char before the last stores a bit-shifted version of the number, each
  // 1 more power than the last, which is done by bit-shifting [0] by 24,
  // [1] by 16, [2] by 8 ([3] is not bit-shifted).
  EXPECT_EQ(0, actual[8]);   // 285 >> 24 = 285 / (256^3) = 0
  EXPECT_EQ(0, actual[9]);   // 285 >> 16 = 285 / (256^2) = 0
  EXPECT_EQ(1, actual[10]);  // 285 >> 8 = 285 / (256^1) = 1(.11328125)
  EXPECT_EQ(29, actual[11]); // 285 - 256 = 29
}

TEST(ClipboardTests, marshall_withHtmlAdded_typeCharIsHtml) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kHTML, "html sucks");
  clipboard.close();

  String actual = clipboard.marshall();

  // string contains other data, but 8th char should be kHTML.
  EXPECT_EQ(IClipboard::kHTML, (int)actual[7]);
}

TEST(ClipboardTests, marshall_withHtmlAndText_has2Formats) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks");
  clipboard.add(IClipboard::kHTML, "html sucks");
  clipboard.close();

  String actual = clipboard.marshall();

  // the number of formats is stored inside the first 4 chars.
  // the writeUInt32 function right-aligns numbers in 4 chars,
  // so if you right align 2, it will be "\0\0\0\2" in a string.
  // we assert that the char at the 4th index is 2 (the number of
  // formats that we've added).
  EXPECT_EQ(2, (int)actual[3]);
}

TEST(ClipboardTests, marshall_withTextAdded_endsWithAdded) {
  Clipboard clipboard;
  clipboard.open(0);
  clipboard.add(IClipboard::kText, "synergy rocks!");
  clipboard.close();

  String actual = clipboard.marshall();

  // string contains other data, but should end in the string we added.
  EXPECT_EQ("synergy rocks!", actual.substr(12));
}

TEST(ClipboardTests, unmarshall_emptyData_hasTextIsFalse) {
  Clipboard clipboard;

  String data;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)0; // 0 formats added

  clipboard.unmarshall(data, 0);

  clipboard.open(0);
  bool actual = clipboard.has(IClipboard::kText);
  EXPECT_FALSE(actual);
}

TEST(ClipboardTests, unmarshall_withTextSize285_getTextIsValid) {
  Clipboard clipboard;

  // 285 chars
  String text;
  text.append("Synergy is Free and Open Source Software that lets you ");
  text.append("easily share your mouse and keyboard between multiple ");
  text.append("computers, where each computer has it's own display. No ");
  text.append("special hardware is required, all you need is a local area ");
  text.append("network. Synergy is supported on Windows, Mac OS X and Linux.");

  String data;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)1; // 1 format added
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)IClipboard::kText;
  data += (char)0;  // 285 >> 24 = 285 / (256^3) = 0
  data += (char)0;  // 285 >> 16 = 285 / (256^2) = 0
  data += (char)1;  // 285 >> 8 = 285 / (256^1) = 1(.11328125)
  data += (char)29; // 285 - 256 = 29
  data += text;

  clipboard.unmarshall(data, 0);

  clipboard.open(0);
  String actual = clipboard.get(IClipboard::kText);
  EXPECT_EQ(text, actual);
}

TEST(ClipboardTests, unmarshall_withTextAndHtml_getTextIsValid) {
  Clipboard clipboard;
  String data;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)2; // 2 formats added
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)IClipboard::kText;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)14;
  data += "synergy rocks!";
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)IClipboard::kHTML;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)10;
  data += "html sucks";

  clipboard.unmarshall(data, 0);

  clipboard.open(0);
  String actual = clipboard.get(IClipboard::kText);
  EXPECT_EQ("synergy rocks!", actual);
}

TEST(ClipboardTests, unmarshall_withTextAndHtml_getHtmlIsValid) {
  Clipboard clipboard;
  String data;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)2; // 2 formats added
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)IClipboard::kText;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)14;
  data += "synergy rocks!";
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)IClipboard::kHTML;
  data += (char)0;
  data += (char)0;
  data += (char)0;
  data += (char)10;
  data += "html sucks";

  clipboard.unmarshall(data, 0);

  clipboard.open(0);
  String actual = clipboard.get(IClipboard::kHTML);
  EXPECT_EQ("html sucks", actual);
}

TEST(ClipboardTests, copy_withSingleText_clipboardsAreEqual) {
  Clipboard clipboard1;
  clipboard1.open(0);
  clipboard1.add(Clipboard::kText, "synergy rocks!");
  clipboard1.close();

  Clipboard clipboard2;
  Clipboard::copy(&clipboard2, &clipboard1);

  clipboard2.open(0);
  String actual = clipboard2.get(Clipboard::kText);
  EXPECT_EQ("synergy rocks!", actual);
}
