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#ifndef SQLITEDB_H

#define SQLITEDB_H

#include "sqlitetypes.h"

#include <QStringList>

#include <QMultiMap>

#include <QByteArray>

struct sqlite3;

class CipherDialog;

enum

{

kLogMsg_User,

kLogMsg_App

};

typedef QMultiMap<QString, sqlb::ObjectPtr> objectMap; // Maps from object type (table, index, view, trigger) to a pointer to the object representation

typedef QMap<QString, objectMap> schemaMap; // Maps from the schema name (main, temp, attached schemas) to the object map for that schema

int collCompare(void* pArg, int sizeA, const void* sA, int sizeB, const void* sB);

class DBBrowserDB : public QObject

{

Q_OBJECT

public:

explicit DBBrowserDB () : _db(nullptr), isEncrypted(false), isReadOnly(false), dontCheckForStructureUpdates(false) {}

virtual ~DBBrowserDB (){}

bool open(const QString& db, bool readOnly = false);

bool attach(const QString& filename, QString attach_as = "");

bool create ( const QString & db);

bool close();

bool setSavepoint(const QString& pointname = "RESTOREPOINT");

bool releaseSavepoint(const QString& pointname = "RESTOREPOINT");

bool revertToSavepoint(const QString& pointname = "RESTOREPOINT");

bool releaseAllSavepoints();

bool revertAll();

bool dump(const QString & filename, const QStringList &tablesToDump, bool insertColNames, bool insertNew, bool exportSchema, bool exportData, bool keepOldSchema);

bool executeSQL(QString statement, bool dirtyDB = true, bool logsql = true);

bool executeMultiSQL(const QString& statement, bool dirty = true, bool log = false);

const QString& lastError() const { return lastErrorMessage; }

/**

* @brief getRow Executes a sqlite statement to get the rowdata(columns)

* for the given rowid.

* @param schemaName Name of the database schema.

* @param sTableName Table to query.

* @param rowid The rowid to fetch.

* @param rowdata A list of QByteArray containing the row data.

* @return true if statement execution was ok, else false.

bool getRow(const sqlb::ObjectIdentifier& table, const QString& rowid, QVector<QByteArray>& rowdata);

/**

* @brief max Queries the table t for the max value of field.

* @param tableName Table to query

* @param field Field to get the max value

* @return the max value of the field or 0 on error

QString max(const sqlb::ObjectIdentifier& tableName, sqlb::FieldPtr field) const;

void updateSchema();

QString addRecord(const sqlb::ObjectIdentifier& tablename);

/**

* @brief Creates an empty insert statement.

* @param schemaName The name of the database schema in which to find the table

* @param pk_value This optional parameter can be used to manually set a specific value for the primary key column

* @return An sqlite conform INSERT INTO statement with empty values. (NULL,'',0)

QString emptyInsertStmt(const QString& schemaName, const sqlb::Table& t, const QString& pk_value = QString()) const;

bool deleteRecords(const sqlb::ObjectIdentifier& table, const QStringList& rowids);

bool updateRecord(const sqlb::ObjectIdentifier& table, const QString& column, const QString& rowid, const QByteArray& value, bool itsBlob, const QString& pseudo_pk = QString());

bool createTable(const sqlb::ObjectIdentifier& name, const sqlb::FieldVector& structure);

bool renameTable(const QString& schema, const QString& from_table, const QString& to_table);

bool addColumn(const sqlb::ObjectIdentifier& tablename, const sqlb::FieldPtr& field);

/**

* @brief alterTable Can be used to rename, modify or drop an existing column of a given table

* @param schema Specifies the name of the schema, i.e. the database name, of the table

* @param tablename Specifies the name of the table to edit

* @param table Specifies the table to edit. The table constraints are used from this but not the columns

* @param name Name of the column to edit

* @param to The new field definition with changed name, type or the like. If Null-Pointer is given the column is dropped.

* @param move Set this to a value != 0 to move the new column to a different position

* @param newSchema Set this to a non-empty string to move the table to a new schema

* @return true if renaming was successful, false if not. In the latter case also lastErrorMessage is set

bool alterTable(const sqlb::ObjectIdentifier& tablename, const sqlb::Table& table, const QString& name, sqlb::FieldPtr to, int move = 0, QString newSchemaName = QString());

objectMap getBrowsableObjects(const QString& schema) const;

const sqlb::ObjectPtr getObjectByName(const sqlb::ObjectIdentifier& name) const;

bool isOpen() const;

bool encrypted() const { return isEncrypted; }

bool readOnly() const { return isReadOnly; }

bool getDirty() const;

QString currentFile() const { return curDBFilename; }

void logSQL(QString statement, int msgtype);

QString getPragma(const QString& pragma);

bool setPragma(const QString& pragma, const QString& value);

bool setPragma(const QString& pragma, const QString& value, QString& originalvalue);

bool setPragma(const QString& pragma, int value, int& originalvalue);

bool loadExtension(const QString& filename);

QVector<QPair<QString, QString>> queryColumnInformation(const QString& schema_name, const QString& object_name);

QString generateSavepointName(const QString& identifier = QString()) const;

// This function generates the name for a temporary table. It guarantees that there is no table with this name yet

QString generateTemporaryTableName(const QString& schema) const;

sqlite3 * _db;

schemaMap schemata;

signals:

void sqlExecuted(QString sql, int msgtype);

void dbChanged(bool dirty);

void structureUpdated();

void requestCollation(QString name, int eTextRep);

private:

QString curDBFilename;

QString lastErrorMessage;

QStringList savepointList;

bool isEncrypted;

bool isReadOnly;

void collationNeeded(void* pData, sqlite3* db, int eTextRep, const char* sCollationName);

bool tryEncryptionSettings(const QString& filename, bool* encrypted, CipherDialog*& cipherSettings);

bool dontCheckForStructureUpdates;

class NoStructureUpdateChecks

{

public:

explicit NoStructureUpdateChecks(DBBrowserDB& db) : m_db(db) { m_db.dontCheckForStructureUpdates = true; }

~NoStructureUpdateChecks() { m_db.dontCheckForStructureUpdates = false; }

private:

DBBrowserDB& m_db;

};

#endif

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