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#ifndef QMLJSCOMPLETIONASSIST_H
#define QMLJSCOMPLETIONASSIST_H

#include "qmljseditor.h"

#include <texteditor/codeassist/basicproposalitem.h>
#include <texteditor/codeassist/basicproposalitemlistmodel.h>
#include <texteditor/codeassist/completionassistprovider.h>
#include <texteditor/codeassist/iassistprocessor.h>
#include <texteditor/snippets/snippetassistcollector.h>
#include <texteditor/codeassist/defaultassistinterface.h>

#include <utils/qtcoverride.h>

#include <QStringList>
#include <QScopedPointer>
#include <QVariant>
#include <QIcon>

namespace QmlJS { class Value; }

namespace QmlJSEditor {
namespace Internal {

class QmlJSCompletionAssistInterface;

class QmlJSAssistProposalItem : public TextEditor::BasicProposalItem
{
public:
    bool prematurelyApplies(const QChar &c) const QTC_OVERRIDE;
    void applyContextualContent(TextEditor::BaseTextEditor *editor,
                                int basePosition) const QTC_OVERRIDE;
};


class QmlJSAssistProposalModel : public TextEditor::BasicProposalItemListModel
{
public:
    QmlJSAssistProposalModel(const QList<TextEditor::BasicProposalItem *> &items)
        : TextEditor::BasicProposalItemListModel(items)
    {}

    void filter(const QString &prefix) QTC_OVERRIDE;
    void sort(const QString &prefix) QTC_OVERRIDE;
    bool keepPerfectMatch(TextEditor::AssistReason reason) const QTC_OVERRIDE;
};


class QmlJSCompletionAssistProvider : public TextEditor::CompletionAssistProvider
{
    Q_OBJECT

public:
    bool supportsEditor(Core::Id editorId) const QTC_OVERRIDE;
    TextEditor::IAssistProcessor *createProcessor() const QTC_OVERRIDE;

    int activationCharSequenceLength() const QTC_OVERRIDE;
    bool isActivationCharSequence(const QString &sequence) const QTC_OVERRIDE;
    bool isContinuationChar(const QChar &c) const QTC_OVERRIDE;
};


class QmlJSCompletionAssistProcessor : public TextEditor::IAssistProcessor
{
public:
    QmlJSCompletionAssistProcessor();
    ~QmlJSCompletionAssistProcessor();

    TextEditor::IAssistProposal *perform(const TextEditor::IAssistInterface *interface) QTC_OVERRIDE;

private:
    TextEditor::IAssistProposal *createContentProposal() const;
    TextEditor::IAssistProposal *createHintProposal(
            const QString &functionName, const QStringList &namedArguments,
            int optionalNamedArguments, bool isVariadic) const;

    bool acceptsIdleEditor() const;

    bool completeUrl(const QString &relativeBasePath, const QString &urlString);
    bool completeFileName(const QString &relativeBasePath,
                          const QString &fileName,
                          const QStringList &patterns = QStringList());

    int m_startPosition;
    QScopedPointer<const QmlJSCompletionAssistInterface> m_interface;
    QList<TextEditor::BasicProposalItem *> m_completions;
    TextEditor::SnippetAssistCollector m_snippetCollector;
};


class QmlJSCompletionAssistInterface : public TextEditor::DefaultAssistInterface
{
public:
    QmlJSCompletionAssistInterface(QTextDocument *textDocument,
                                   int position,
                                   const QString &fileName,
                                   TextEditor::AssistReason reason,
                                   const QmlJSTools::SemanticInfo &info);
    const QmlJSTools::SemanticInfo &semanticInfo() const;
    const QIcon &fileNameIcon() const { return m_darkBlueIcon; }
    const QIcon &keywordIcon() const { return m_darkYellowIcon; }
    const QIcon &symbolIcon() const { return m_darkCyanIcon; }

private:
    QmlJSTools::SemanticInfo m_semanticInfo;
    QIcon m_darkBlueIcon;
    QIcon m_darkYellowIcon;
    QIcon m_darkCyanIcon;
};

} // Internal
} // QmlJSEditor

#endif // QMLJSCOMPLETIONASSIST_H