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#include "senddocumenttracker.h"

#include <algorithm>

namespace CppTools {

void SendDocumentTracker::setLastSentRevision(int revision)
{
    m_lastSentRevision = revision;
    m_contentChangeStartPosition = std::numeric_limits<int>::max();
}

int SendDocumentTracker::lastSentRevision() const
{
    return m_lastSentRevision;
}

void SendDocumentTracker::setLastCompletionPosition(int lastCompletionPosition)
{
    m_lastCompletionPosition = lastCompletionPosition;
}

int SendDocumentTracker::lastCompletionPosition() const
{
    return m_lastCompletionPosition;
}

void SendDocumentTracker::applyContentChange(int startPosition)
{
    if (startPosition < m_lastCompletionPosition)
        m_lastCompletionPosition = -1;

    m_contentChangeStartPosition = std::min(startPosition, m_contentChangeStartPosition);
}

bool SendDocumentTracker::shouldSendCompletion(int newCompletionPosition) const
{
    return m_lastCompletionPosition != newCompletionPosition;
}

bool SendDocumentTracker::shouldSendRevision(uint newRevision) const
{
    return m_lastSentRevision != int(newRevision);
}

bool SendDocumentTracker::shouldSendRevisionWithCompletionPosition(int newRevision, int newCompletionPosition) const
{
    if (shouldSendRevision(newRevision))
        return changedBeforeCompletionPosition(newCompletionPosition);

    return false;
}

bool SendDocumentTracker::changedBeforeCompletionPosition(int newCompletionPosition) const
{
    return m_contentChangeStartPosition < newCompletionPosition;
}

} // namespace CppTools