/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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#pragma once

#include "precompiledheaderstorageinterface.h"

#include <sqlitetransaction.h>
#include <sqliteexception.h>

#include <utils/smallstringview.h>

namespace ClangBackEnd {

template<typename Database=Sqlite::Database>
class PrecompiledHeaderStorage final : public PrecompiledHeaderStorageInterface
{
    using ReadStatement = typename Database::ReadStatement;
    using WriteStatement = typename Database::WriteStatement;
public:
    PrecompiledHeaderStorage(Database &database)
        : m_transaction(database),
          m_database(database)
    {
        m_transaction.commit();
    }

    void insertProjectPrecompiledHeader(Utils::SmallStringView projectPartName,
                                 Utils::SmallStringView pchPath,
                                 long long pchBuildTime) override
    {
        try {
            Sqlite::ImmediateTransaction transaction{m_database};

            m_insertProjectPartStatement.write(projectPartName);
            m_insertProjectPrecompiledHeaderStatement.write(projectPartName, pchPath, pchBuildTime);

            transaction.commit();
        } catch (const Sqlite::StatementIsBusy) {
            insertProjectPrecompiledHeader(projectPartName, pchPath, pchBuildTime);
        }
    }

    void deleteProjectPrecompiledHeader(Utils::SmallStringView projectPartName) override
    {
        try {
            Sqlite::ImmediateTransaction transaction{m_database};

            m_deleteProjectPrecompiledHeaderStatement.write(projectPartName);

            transaction.commit();
        } catch (const Sqlite::StatementIsBusy) {
            deleteProjectPrecompiledHeader(projectPartName);
        }
    }

    void insertSystemPrecompiledHeader(Utils::SmallStringView projectPartName,
                                       Utils::SmallStringView pchPath,
                                       long long pchBuildTime) override
    {
        try {
            Sqlite::ImmediateTransaction transaction{m_database};

            m_insertProjectPartStatement.write(projectPartName);
            m_insertSystemPrecompiledHeaderStatement.write(projectPartName, pchPath, pchBuildTime);

            transaction.commit();
        } catch (const Sqlite::StatementIsBusy) {
            insertSystemPrecompiledHeader(projectPartName, pchPath, pchBuildTime);
        }
    }

    void deleteSystemPrecompiledHeader(Utils::SmallStringView projectPartName) override
    {
        try {
            Sqlite::ImmediateTransaction transaction{m_database};

            m_deleteSystemPrecompiledHeaderStatement.write(projectPartName);

            transaction.commit();
        } catch (const Sqlite::StatementIsBusy) {
            deleteSystemPrecompiledHeader(projectPartName);
        }
    }

    Utils::PathString fetchSystemPrecompiledHeaderPath(Utils::SmallStringView projectPartName) override
    {
        try {
            Sqlite::DeferredTransaction transaction{m_database};

            auto value = m_fetchSystemPrecompiledHeaderPathStatement
                             .template value<Utils::PathString>(projectPartName);

            if (value)
                return value.value();

            transaction.commit();
        } catch (const Sqlite::StatementIsBusy) {
            return fetchSystemPrecompiledHeaderPath(projectPartName);
        }

        return Utils::SmallStringView("");
    }

public:
    Sqlite::ImmediateNonThrowingDestructorTransaction m_transaction;
    Database &m_database;
    WriteStatement m_insertProjectPrecompiledHeaderStatement{
        "INSERT INTO precompiledHeaders(projectPartId, projectPchPath, projectPchBuildTime) "
        "VALUES((SELECT projectPartId FROM projectParts WHERE projectPartName = ?001),?002,?003) "
        "ON CONFLICT (projectPartId) DO UPDATE SET projectPchPath=?002,projectPchBuildTime=?003",
        m_database};
    WriteStatement m_insertSystemPrecompiledHeaderStatement{
        "INSERT INTO precompiledHeaders(projectPartId, systemPchPath, systemPchBuildTime) "
        "VALUES((SELECT projectPartId FROM projectParts WHERE projectPartName = ?001),?002,?003) "
        "ON CONFLICT (projectPartId) DO UPDATE SET systemPchPath=?002,systemPchBuildTime=?003",
        m_database};
    WriteStatement m_insertProjectPartStatement{
        "INSERT OR IGNORE INTO projectParts(projectPartName) VALUES (?)", m_database};
    WriteStatement m_deleteProjectPrecompiledHeaderStatement{
        "UPDATE OR IGNORE precompiledHeaders SET projectPchPath=NULL,projectPchBuildTime=NULL "
        "WHERE projectPartId = (SELECT projectPartId FROM "
        "projectParts WHERE projectPartName = ?)",
        m_database};
    WriteStatement m_deleteSystemPrecompiledHeaderStatement{
        "UPDATE OR IGNORE precompiledHeaders SET systemPchPath=NULL,systemPchBuildTime=NULL "
        "WHERE projectPartId = (SELECT projectPartId FROM "
        "projectParts WHERE projectPartName = ?)",
        m_database};
    ReadStatement m_fetchSystemPrecompiledHeaderPathStatement{
        "SELECT systemPchPath FROM precompiledHeaders WHERE projectPartId = (SELECT projectPartId "
        "FROM projectParts WHERE projectPartName = ?)",
        m_database};
};

}