/**
 * Copyright (c) 2011-2018 by Andrew Mustun. All rights reserved.
 * 
 * This file is part of the QCAD project.
 *
 * QCAD 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.
 *
 * QCAD 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 QCAD.
 */

include("../Transform.js");

/**
 * \class Translate
 * \brief Translates (moves or copies) selected entities. Supports multiple copies.
 * \ingroup ecma_modify
 */
function Translate(guiAction) {
    Transform.call(this, guiAction);

    this.referencePoint = undefined;
    this.targetPoint = undefined;

    this.useDialog = RSettings.getBoolValue("Translate/UseDialog", true);

    if (!this.useDialog) {
        this.setUiOptions("Translate.ui");
    }
}

Translate.prototype = new Transform();
Translate.includeBasePath = includeBasePath;

Translate.getPreferencesCategory = function() {
    return [qsTr("Modify"), qsTr("Move/Copy")];
};

Translate.State = {
    SettingReferencePoint : 0,
    SettingTargetPoint : 1
};

Translate.prototype.beginEvent = function() {
    Transform.prototype.beginEvent.call(this);

    if (!this.verifySelection()) {
        return;
    }

    this.setState(Translate.State.SettingReferencePoint);
};

Translate.prototype.initState = function(state) {
    this.getDocumentInterface().setClickMode(RAction.PickCoordinate);
    this.setCrosshairCursor();

    var appWin = RMainWindowQt.getMainWindow();
    switch (this.state) {
    case Translate.State.SettingReferencePoint:
        this.referencePoint = undefined;
        this.targetPoint = undefined;
        var trReferencePoint = qsTr("Reference point");
        this.setCommandPrompt(trReferencePoint);
        this.setLeftMouseTip(trReferencePoint);
        this.setRightMouseTip(EAction.trCancel);
        break;

    case Translate.State.SettingTargetPoint:
        this.targetPoint = undefined;
        var trTargetPoint = qsTr("Target point");
        this.setCommandPrompt(trTargetPoint);
        this.setLeftMouseTip(trTargetPoint);
        this.setRightMouseTip(EAction.trBack);
        break;
    }

    EAction.showSnapTools();
};

Translate.prototype.escapeEvent = function() {
    switch (this.state) {
    case Translate.State.SettingReferencePoint:
        Transform.prototype.escapeEvent.call(this);
        break;

    case Translate.State.SettingTargetPoint:
        this.setState(Translate.State.SettingReferencePoint);
        break;
    }
};

Translate.prototype.pickCoordinate = function(event, preview) {
    var di = this.getDocumentInterface();
    var op;

    switch (this.state) {
    case Translate.State.SettingReferencePoint:
        if (!preview) {
            this.referencePoint = event.getModelPosition();
            di.setRelativeZero(this.referencePoint);
            this.setState(Translate.State.SettingTargetPoint);
        }
        break;

    case Translate.State.SettingTargetPoint:
        this.targetPoint = event.getModelPosition();

        if (preview) {
            op = this.getOperation(true);
            if (!isNull(op)) {
                di.previewOperation(op);
            }
        }
        else {
            if (this.useDialog) {
                this.setState(-1);
                if (!this.showDialog()) {
                    // dialog canceled:
                    this.terminate();
                    return;
                }
            }

            op = this.getOperation(false);
            if (!isNull(op)) {
                di.applyOperation(op);
                di.setRelativeZero(this.targetPoint);
                this.terminate();
            }
        }
        break;
    }
};

Translate.prototype.getOperation = function(preview, selectResult) {
    if (isNull(this.copies)) {
        return undefined;
    }

    if (isNull(selectResult)) {
        selectResult = true;
    }

    var di = this.getDocumentInterface();

    var op = new RModifyObjectsOperation();
    var offset = this.targetPoint.operator_subtract(this.referencePoint)
    var transformation = new RTranslation(offset);
    op.transformSelection(transformation, di, this.getCopies(), preview, selectResult, this.useCurrentAttributes);

    return op;
};

/**
 * Shows the translation dialog.
 *
 * \return True if the dialog was accepted, false if it was canceled.
 */
Translate.prototype.showDialog = function() {
    var dialog = WidgetFactory.createDialog(Translate.includeBasePath, "TranslateDialog.ui");
    WidgetFactory.restoreState(dialog);
    if (!dialog.exec()) {
        destr(dialog);
        EAction.activateMainWindow();
        return false;
    }

    var widgets = getWidgets(dialog);
    if (widgets["DeleteOriginal"].checked===true) {
        this.copies = 0;
    }
    else if (widgets["KeepOriginal"].checked===true) {
        this.copies = 1;
    }
    else {
        this.copies = widgets["NumberOfCopies"].getValue();
    }

    this.useCurrentAttributes = (widgets["UseCurrentAttributes"].checked===true);

    WidgetFactory.saveState(dialog);

    destr(dialog);
    EAction.activateMainWindow();
    return true;
};