/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "librarydialog.h"
#include "ui_librarydialog.h"
#include "libraryaddfunctiondialog.h"
#include "libraryeditargdialog.h"

#include <QFile>
#include <QSettings>
#include <QFileDialog>
#include <QTextStream>
#include <QInputDialog>

// TODO: get/compare functions from header

LibraryDialog::LibraryDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LibraryDialog),
    ignoreChanges(false)
{
    ui->setupUi(this);
    ui->buttonSave->setEnabled(false);
}

LibraryDialog::~LibraryDialog()
{
    delete ui;
}

void LibraryDialog::openCfg()
{
    const QSettings settings;
    const QString datadir = settings.value("DATADIR",QString()).toString();

    QString selectedFilter;
    const QString filter(tr("Library files (*.cfg)"));
    const QString selectedFile = QFileDialog::getOpenFileName(this,
                                 tr("Open library file"),
                                 datadir,
                                 filter,
                                 &selectedFilter);

    if (!selectedFile.isEmpty()) {
        mFileName.clear();
        QFile file(selectedFile);
        if (file.open(QIODevice::ReadOnly | QIODevice::Text)) {
            ignoreChanges = true;
            data.open(file);
            mFileName = selectedFile;
            ui->buttonSave->setEnabled(false);
            ui->functions->clear();
            foreach(const struct CppcheckLibraryData::Function &function, data.functions) {
                ui->functions->addItem(function.name);
            }
            ignoreChanges = false;
        }
    }
}

void LibraryDialog::saveCfg()
{
    if (mFileName.isNull())
        return;
    QFile file(mFileName);
    if (file.open(QIODevice::WriteOnly | QIODevice::Text)) {
        QTextStream ts(&file);
        ts << data.toString();
        ui->buttonSave->setEnabled(false);
    }
}

void LibraryDialog::addFunction()
{
    LibraryAddFunctionDialog *d = new LibraryAddFunctionDialog;
    if (d->exec() == QDialog::Accepted && !d->functionName().isEmpty()) {

        CppcheckLibraryData::Function f;
        f.name = d->functionName();
        int args = d->numberOfArguments();

        for (int i = 1; i <= args; i++) {
            CppcheckLibraryData::Function::Arg arg;
            arg.nr = i;
            f.args.append(arg);
        }
        data.functions.append(f);
        ui->functions->addItem(f.name);
        ui->buttonSave->setEnabled(true);
    }
    delete d;
}

void LibraryDialog::selectFunction(int row)
{
    if (row == -1) {
        ui->functionreturn->setChecked(false);
        ui->useretval->setChecked(false);
        ui->leakignore->setChecked(false);
        ui->arguments->clear();
        return;
    }

    ignoreChanges = true;
    const CppcheckLibraryData::Function &function = data.functions[row];
    ui->functionreturn->setChecked(!function.noreturn);
    ui->useretval->setChecked(function.useretval);
    ui->leakignore->setChecked(function.leakignore);
    updateArguments(function);
    ignoreChanges = false;
}

void LibraryDialog::changeFunction()
{
    if (ignoreChanges)
        return;
    foreach(const QListWidgetItem *item, ui->functions->selectedItems()) {
        CppcheckLibraryData::Function &function = data.functions[ui->functions->row(item)];
        function.noreturn   = !ui->functionreturn->isChecked();
        function.useretval  = ui->useretval->isChecked();
        function.leakignore = ui->leakignore->isChecked();
    }
    ui->buttonSave->setEnabled(true);
}

void LibraryDialog::editArg()
{
    if (ui->functions->selectedItems().count() != 1)
        return;
    if (ui->arguments->selectedItems().count() != 1)
        return;

    CppcheckLibraryData::Function &function = data.functions[ui->functions->row(ui->functions->selectedItems().first())];
    CppcheckLibraryData::Function::Arg &arg = function.args[ui->arguments->row(ui->arguments->selectedItems().first())];

    LibraryEditArgDialog *d = new LibraryEditArgDialog(0, arg);
    if (d->exec() == QDialog::Accepted) {
        arg = d->getArg();
        ui->arguments->selectedItems().first()->setText(getArgText(arg));
    }

    delete d;
    ui->buttonSave->setEnabled(true);
}

QString LibraryDialog::getArgText(const CppcheckLibraryData::Function::Arg &arg)
{
    QString s("arg");
    if (arg.nr != CppcheckLibraryData::Function::Arg::ANY)
        s += QString::number(arg.nr);

    s += "\n    not bool: " + QString(arg.notbool ? "true" : "false");
    s += "\n    not null: " + QString(arg.notnull ? "true" : "false");
    s += "\n    not uninit: " + QString(arg.notuninit ? "true" : "false");
    s += "\n    format string: " + QString(arg.formatstr ? "true" : "false");
    s += "\n    strz: " + QString(arg.strz ? "true" : "false");
    s += "\n    valid: " + QString(arg.valid.isEmpty() ? "any" : arg.valid);
    foreach(const CppcheckLibraryData::Function::Arg::MinSize &minsize, arg.minsizes) {
        s += "\n    minsize: " + minsize.type + " " + minsize.arg + " " + minsize.arg2;
    }
    return s;
}

void LibraryDialog::updateArguments(const CppcheckLibraryData::Function &function)
{
    ui->arguments->clear();
    foreach(const CppcheckLibraryData::Function::Arg &arg, function.args) {
        ui->arguments->addItem(getArgText(arg));
    }
}