/**
* @param proficiency 表示只选择这个熟练度以下（包括当前）的，当取ProficiencyCount时表示不限熟练度
* @param bAllTime 选取全部时间范围的词
*/
public bool InitQuiz(ArrayList wordPads, QuizType type, int testWordCount, NewWordItem.ProficiencyLevel proficiency, DateTime starDate, DateTime endDate, bool bAllTime = true)
{
HashSet <int> alreadyChoosedWordIndice = new HashSet <int>();
ArrayList totalWords = new ArrayList();
ArrayList totalWordsForOption = new ArrayList(); //不考虑时间的所有词，作为选项候选
int totalWordCount = 0;
System.Collections.IEnumerator iterator = wordPads.GetEnumerator();
DateTime earliestTime = new DateTime(8000, 12, 31);
DateTime latestTime = new DateTime(1000, 1, 1);
while (iterator.MoveNext())
{
WordPad wordPad = iterator.Current as WordPad;
totalWordsForOption.AddRange(wordPad.Words);
if (bAllTime)
{
totalWordCount += wordPad.Words.Count;
totalWords.AddRange(wordPad.Words);
}
else
{
ArrayList wordsWithinTimeRange = wordPad.GetWordsByTimeRange(starDate, endDate);
totalWordCount += wordsWithinTimeRange.Count;
totalWords.AddRange(wordsWithinTimeRange);
if (earliestTime.CompareTo(wordPad.EarliestAddTime) > 0)
{
earliestTime = wordPad.EarliestAddTime;
}
if (latestTime.CompareTo(wordPad.LatestAddTime) < 0)
{
latestTime = wordPad.LatestAddTime;
}
}
}
if (!bAllTime &&
(starDate.CompareTo(latestTime) > 0 || // not in time range
endDate.CompareTo(earliestTime) < 0)
)
{
MessageBox.Show("specified time range exceed all the words' total time range!");
return(false);
}
if (totalWords.Count <= 3)
{
MessageBox.Show("Not sufficient words for a valid test!");
return(false);
}
if (testWordCount > totalWords.Count)
{
testWordCount = totalWords.Count;
MessageBox.Show("test word count is more than word count in all selected wordpads, so clamp to the actual count: " + totalWords.Count);
}
Random randGenerator = new Random(Convert.ToInt32(DateTime.Now.Millisecond));
for (int i = 0; i < testWordCount; i++)
{
int globalIndex = randGenerator.Next(0, totalWordCount);
NewWordItem candidateWord = (NewWordItem)totalWords[globalIndex];
// exclude words not fit condition
while (alreadyChoosedWordIndice.Contains(globalIndex) ||
candidateWord.Meaning == "" ||
candidateWord.Proficiency > proficiency ||
(!bAllTime &&
(candidateWord.AddTime.CompareTo(starDate) < 0 || // not in time range
candidateWord.AddTime.CompareTo(endDate) > 0)
)
)
{
globalIndex = randGenerator.Next(0, totalWordCount);
candidateWord = (NewWordItem)totalWords[globalIndex];
}
// add test word
m_testWords.Add(totalWords[globalIndex]);
// add meaning options for words
HashSet <int> optionsChoosedForCurWord = new HashSet <int>();
optionsChoosedForCurWord.Add(globalIndex);
ArrayList optionWords = new ArrayList();
for (int j = 0; j < 3; j++)
{
int optionWordIndex = randGenerator.Next(0, totalWordsForOption.Count);
while (optionsChoosedForCurWord.Contains(optionWordIndex) ||
((NewWordItem)totalWordsForOption[optionWordIndex]).Meaning == "")
{
optionWordIndex = randGenerator.Next(0, totalWordsForOption.Count);
}
optionWords.Add(totalWordsForOption[optionWordIndex]);
optionsChoosedForCurWord.Add(optionWordIndex);
}
// insert correct word option
int insertPos = randGenerator.Next(0, 3);
optionWords.Insert(insertPos, totalWords[globalIndex]);
m_wordToOptionMap.Add(((NewWordItem)totalWords[globalIndex]).Name, optionWords);
alreadyChoosedWordIndice.Add(globalIndex);
}
m_curTestWordIndex = 0;
m_startTime = DateTime.Now;
UpdateWordUI();
return(true);
}
