#include "baseform.h"

#include "inputdouble.h"
#include "inputint.h"
#include "inputboolean.h"
#include "inputcolor.h"
#include "inputcolorgradation.h"
#include "inputnoise.h"
#include "inputcurve.h"
#include "inputmaterial.h"
#include "inputenum.h"
#include "inputlayers.h"
#include "BasePreview.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QVariant>
#include <QInputDialog>
#include <QComboBox>
#include <QPushButton>

BaseForm::BaseForm(QWidget* parent, bool auto_apply, bool with_layers) : QWidget(parent)
{
    QWidget* control;
    QWidget* layers;
    QLabel* label;

    this->_auto_apply = auto_apply;
    this->_with_layers = with_layers;

    setLayout(new QHBoxLayout());

    control = new QWidget(this);
    control->setLayout(new QVBoxLayout());
    control->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
    layout()->addWidget(control);

    _layer_count = 0;

    if (with_layers)
    {
        layers = new QWidget(this);
        layers->setLayout(new QHBoxLayout());
        layers->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);

        label = new QLabel(tr("Layers : "), layers);
        label->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        layers->layout()->addWidget(label);

        _layer_list = new QComboBox(layers);
        layers->layout()->addWidget(_layer_list);
        QObject::connect(_layer_list, SIGNAL(currentIndexChanged(int)), this, SLOT(layerListChanged()));

        _layer_new = new QPushButton(QIcon(getDataPath("images/layer_add.png")), "", layers);
        _layer_new->setToolTip(tr("Add layer"));
        _layer_new->setMaximumSize(30, 30);
        layers->layout()->addWidget(_layer_new);
        QObject::connect(_layer_new, SIGNAL(clicked()), this, SLOT(layerAddClicked()));

        _layer_del = new QPushButton(QIcon(getDataPath("images/layer_del.png")), "", layers);
        _layer_del->setToolTip(tr("Delete layer"));
        _layer_del->setMaximumSize(30, 30);
        layers->layout()->addWidget(_layer_del);
        QObject::connect(_layer_del, SIGNAL(clicked()), this, SLOT(layerDelClicked()));

        _layer_rename = new QPushButton(QIcon(getDataPath("images/layer_rename.png")), "", layers);
        _layer_rename->setToolTip(tr("Rename layer"));
        _layer_rename->setMaximumSize(30, 30);
        layers->layout()->addWidget(_layer_rename);
        QObject::connect(_layer_rename, SIGNAL(clicked()), this, SLOT(layerRenameClicked()));

        _layer_up = new QPushButton(QIcon(getDataPath("images/layer_up.png")), "", layers);
        _layer_up->setToolTip(tr("Move layer upward"));
        _layer_up->setMaximumSize(30, 30);
        layers->layout()->addWidget(_layer_up);
        QObject::connect(_layer_up, SIGNAL(clicked()), this, SLOT(layerUpClicked()));

        _layer_down = new QPushButton(QIcon(getDataPath("images/layer_down.png")), "", layers);
        _layer_down->setToolTip(tr("Move layer downward"));
        _layer_down->setMaximumSize(30, 30);
        layers->layout()->addWidget(_layer_down);
        QObject::connect(_layer_down, SIGNAL(clicked()), this, SLOT(layerDownClicked()));

        control->layout()->addWidget(layers);
        control->layout()->setAlignment(_buttons, Qt::AlignTop);
    }

    _previews = new QWidget(this);
    _previews->setLayout(new QVBoxLayout());
    _previews->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    layout()->addWidget(_previews);
    layout()->setAlignment(_previews, Qt::AlignTop);

    _form = new QWidget(this);
    _form->setLayout(new QHBoxLayout());
    control->layout()->addWidget(_form);
    control->layout()->setAlignment(_form, Qt::AlignTop);

    _form_labels = new QWidget(_form);
    _form_labels->setLayout(new QVBoxLayout());
    _form->layout()->addWidget(_form_labels);

    _form_previews = new QWidget(_form);
    _form_previews->setLayout(new QVBoxLayout());
    _form->layout()->addWidget(_form_previews);

    _form_controls = new QWidget(_form);
    _form_controls->setLayout(new QVBoxLayout());
    _form->layout()->addWidget(_form_controls);

    _buttons = new QWidget(this);
    _buttons->setLayout(new QHBoxLayout());
    control->layout()->addWidget(_buttons);
    control->layout()->setAlignment(_buttons, Qt::AlignBottom);

    _button_revert = addButton(tr("Revert"));
    _button_revert->setIcon(QIcon(getDataPath("images/cancel.png")));
    _button_revert->setEnabled(false);
    connect(_button_revert, SIGNAL(clicked()), this, SLOT(revertConfig()));
    _button_apply = addButton(tr("Apply"));
    _button_apply->setIcon(QIcon(getDataPath("images/apply.png")));
    _button_apply->setEnabled(false);
    connect(_button_apply, SIGNAL(clicked()), this, SLOT(applyConfig()));
    _button_preset = addButton(tr("Load preset"));
    _button_preset->setIcon(QIcon(getDataPath("images/auto.png")));
    _button_preset->hide();
    connect(_button_preset, SIGNAL(clicked()), this, SLOT(presetChoiceClicked()));

    _auto_update_previews = true;

    if (auto_apply)
    {
        hideButtons();
    }
}

void BaseForm::hideButtons()
{
    _button_apply->hide();
    _button_revert->hide();
}

void BaseForm::savePack(PackStream* stream)
{
    // Save previews status
    for (int i = 0; i < _previews_list.size(); i++)
    {
        _previews_list[i]->savePack(stream);
    }
}

void BaseForm::loadPack(PackStream* stream)
{
    // Load previews status
    for (int i = 0; i < _previews_list.size(); i++)
    {
        _previews_list[i]->loadPack(stream);
    }
}

void BaseForm::configChangeEvent()
{
    if (_auto_apply)
    {
        applyConfig();
    }
    else
    {
        _button_apply->setEnabled(true);
        _button_revert->setEnabled(true);
    }

    for (int i = 0; i < _inputs_list.size(); i++)
    {
        if (_with_layers && _layer_list->count() == 0)
        {
            _inputs_list[i]->checkVisibility(false);
        }
        else
        {
            _inputs_list[i]->checkVisibility(true);
        }
    }

    if (_auto_update_previews)
    {
        updatePreviews();
    }
}

void BaseForm::autoPresetSelected(int)
{
    for (int i = 0; i < _inputs_list.size(); i++)
    {
        _inputs_list[i]->revert();
    }
    updatePreviews();
    configChangeEvent();
}

void BaseForm::revertConfig()
{
    for (int i = 0; i < _inputs_list.size(); i++)
    {
        _inputs_list[i]->revert();
    }

    if (_with_layers)
    {
        rebuildLayerList();
        if (_layer_list->currentIndex() < 0 && _layer_list->count() > 0)
        {
            _layer_list->setCurrentIndex(0);
        }
    }

    for (int i = 0; i < _inputs_list.size(); i++)
    {
        if (_with_layers && _layer_list->count() == 0)
        {
            _inputs_list[i]->checkVisibility(false);
        }
        else
        {
            _inputs_list[i]->checkVisibility(true);
        }
    }

    updatePreviews();
    //configChangeEvent();

    _button_apply->setEnabled(false);
    _button_revert->setEnabled(false);
}

void BaseForm::applyConfig()
{
    _button_apply->setEnabled(false);
    _button_revert->setEnabled(false);

    emit(configApplied());
}

void BaseForm::rebuildLayerList()
{
    if (_with_layers)
    {
        int selected = _layer_list->currentIndex();
        _layer_list->clear();

        _layer_names = getLayers();
        _layer_count = _layer_names.count();

        for (int i = 0; i < _layer_count; i++)
        {
            _layer_list->addItem(QString(tr("Layer %1 - %2")).arg(i + 1).arg(_layer_names[i]));
        }
        if (selected >= 0)
        {
            if (selected >= _layer_count)
            {
                _layer_list->setCurrentIndex(_layer_count - 1);
            }
            else
            {
                _layer_list->setCurrentIndex(selected);
            }
        }
    }
}

void BaseForm::layerAddClicked()
{
    layerAddedEvent();

    rebuildLayerList();
    _layer_list->setCurrentIndex(_layer_list->count() - 1);

    _button_apply->setEnabled(true);
    _button_revert->setEnabled(true);
}

void BaseForm::layerDelClicked()
{
    if (_layer_list->currentIndex() >= 0)
    {
        layerDeletedEvent(_layer_list->currentIndex());

        rebuildLayerList();

        _button_apply->setEnabled(true);
        _button_revert->setEnabled(true);
    }
}

void BaseForm::layerUpClicked()
{
    if (_layer_list->currentIndex() < _layer_count - 1)
    {
        layerMovedEvent(_layer_list->currentIndex(), _layer_list->currentIndex() + 1);

        rebuildLayerList();

        _layer_list->setCurrentIndex(_layer_list->currentIndex() + 1);

        _button_apply->setEnabled(true);
        _button_revert->setEnabled(true);
    }
}

void BaseForm::layerDownClicked()
{
    if (_layer_list->currentIndex() > 0)
    {
        layerMovedEvent(_layer_list->currentIndex(), _layer_list->currentIndex() - 1);

        rebuildLayerList();

        _layer_list->setCurrentIndex(_layer_list->currentIndex() - 1);

        _button_apply->setEnabled(true);
        _button_revert->setEnabled(true);
    }
}

void BaseForm::layerRenameClicked()
{
    int layer = _layer_list->currentIndex();
    if (layer >= 0)
    {
        QString new_name = QInputDialog::getText(this, tr("Rename layer"), tr("New name: "), QLineEdit::Normal, _layer_names[layer]);
        if (not new_name.isEmpty())
        {
            layerRenamedEvent(layer, new_name);

            _button_apply->setEnabled(true);
            _button_revert->setEnabled(true);
        }
    }
}

void BaseForm::layerListChanged()
{
    bool changed = _button_apply->isEnabled();

    layerSelectedEvent(_layer_list->currentIndex());

    _button_apply->setEnabled(changed);
    _button_revert->setEnabled(changed);
}

void BaseForm::presetChoiceClicked()
{
    bool ok;
    QString item = QInputDialog::getItem(this, tr("Choose a preset"), tr("Preset settings : "), _preset_list, 0, false, &ok);

    if (ok && !item.isEmpty())
    {
        int preset = _preset_list.indexOf(item);
        if (preset >= 0)
        {
            autoPresetSelected(preset);
        }
    }
}

void BaseForm::addPreview(BasePreview* preview, QString label)
{
    QLabel* label_widget;

    label_widget = new QLabel(label, _previews);
    label_widget->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);

    _previews->layout()->addWidget(label_widget);
    _previews->layout()->addWidget(preview);

    _previews_list.append(preview);
}

QPushButton* BaseForm::addButton(QString label)
{
    QPushButton* button = new QPushButton(label);
    _buttons->layout()->addWidget(button);
    return button;
}

void BaseForm::addAutoPreset(QString label)
{
    _preset_list.append(label);
    _button_preset->show();
}

BaseInput* BaseForm::addInput(BaseInput* input)
{
    int row_height = 30;

    _form_labels->layout()->addWidget(input->label());
    _form_previews->layout()->addWidget(input->preview());
    _form_controls->layout()->addWidget(input->control());

    input->label()->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
    input->label()->setMinimumSize(150, row_height);
    input->label()->setMaximumSize(250, row_height);

    input->preview()->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
    input->preview()->setMinimumSize(100, row_height);
    input->preview()->setMaximumSize(250, row_height);

    input->control()->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
    input->control()->setMinimumSize(280, row_height);
    input->control()->setMaximumSize(700, row_height);

    connect(input, SIGNAL(valueChanged()), this, SLOT(configChangeEvent()));

    _inputs_list.append(input);
    input->revert();

    return input;
}

BaseInput* BaseForm::addInputInt(QString label, int* value, int min, int max, int small_step, int large_step)
{
    return addInput(new InputInt(_form, label, value, min, max, small_step, large_step));
}

BaseInput* BaseForm::addInputDouble(QString label, double* value, double min, double max, double small_step, double large_step)
{
    return addInput(new InputDouble(_form, label, value, min, max, small_step, large_step));
}

BaseInput* BaseForm::addInputBoolean(QString label, int* value)
{
    return addInput(new InputBoolean(_form, label, value));
}

BaseInput* BaseForm::addInputColor(QString label, Color* value)
{
    return addInput(new InputColor(_form, label, value));
}

BaseInput* BaseForm::addInputColorGradation(QString label, ColorGradation* value)
{
    return addInput(new InputColorGradation(_form, label, value));
}

BaseInput* BaseForm::addInputNoise(QString label, NoiseGenerator* value)
{
    return addInput(new InputNoise(_form, label, value));
}

BaseInput* BaseForm::addInputCurve(QString label, Curve* value, double xmin, double xmax, double ymin, double ymax, QString xlabel, QString ylabel)
{
    return addInput(new InputCurve(_form, label, value, xmin, xmax, ymin, ymax, xlabel, ylabel));
}

BaseInput* BaseForm::addInputMaterial(QString label, SurfaceMaterial* material)
{
    return addInput(new InputMaterial(_form, label, material));
}

BaseInput* BaseForm::addInputEnum(QString label, int* value, const QStringList& values)
{
    return addInput(new InputEnum(_form, label, value, values));
}

BaseInput* BaseForm::addInputLayers(QString label, Layers* value, FormLayerBuilder form_builder)
{
    return addInput(new InputLayers(_form, label, value, form_builder));
}

void BaseForm::updatePreviews()
{
    for (int i = 0; i < _previews_list.size(); i++)
    {
        _previews_list[i]->redraw();
    }
}

void BaseForm::disablePreviewsUpdate()
{
    _auto_update_previews = false;
}

int BaseForm::currentLayer()
{
    if (_with_layers)
    {
        return _layer_list->currentIndex();
    }
    else
    {
        return -1;
    }
}

QStringList BaseForm::getLayers()
{
    return QStringList();
}

void BaseForm::layerAddedEvent()
{
    rebuildLayerList();
}

void BaseForm::layerDeletedEvent(int)
{
    rebuildLayerList();
}

void BaseForm::layerMovedEvent(int, int)
{
    rebuildLayerList();
}

void BaseForm::layerRenamedEvent(int, QString)
{
    rebuildLayerList();
}

void BaseForm::layerSelectedEvent(int layer)
{
    for (int i = 0; i < _inputs_list.size(); i++)
    {
        _inputs_list[i]->revert();
        _inputs_list[i]->checkVisibility(layer >= 0);
    }

    for (int i = 0; i < _previews_list.size(); i++)
    {
        _previews_list[i]->redraw();
    }

    _layer_del->setEnabled(layer >= 0);
    _layer_rename->setEnabled(layer >= 0);
    _layer_down->setEnabled(layer > 0);
    _layer_up->setEnabled(layer >= 0 and layer < _layer_count - 1);
}