/**
 * Copyright (c) 2013 by Matthias Melcher. All rights reserved.
 *
 * This file is an extension of the QCAD project.
 *
 * LineBoxJoint 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.
 *
 * LineBoxJoint 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("script/EAction.js");

/**
 * \class LineBoxJoint
 * \brief Box joint line between two points.
 * \ingroup ecma_misc_draw
 */
function LineBoxJoint(guiAction) {
    EAction.call(this, guiAction);

    this.corner1 = undefined;
    this.corner2 = undefined;

    this.fingerHeight = undefined;
    this.fingerLength = undefined;
    this.slotRatio = undefined;
    this.fingerStyle = undefined;

    this.setUiOptions("LineBoxJoint.ui");
}

LineBoxJoint.prototype = new EAction();

LineBoxJoint.State = {
    SettingCorner1 : 0,
    SettingCorner2 : 1
};

LineBoxJoint.prototype.beginEvent = function() {
    EAction.prototype.beginEvent.call(this);

    this.setState(LineBoxJoint.State.SettingCorner1);
};

LineBoxJoint.prototype.setState = function(state) {
    EAction.prototype.setState.call(this, state);

    this.getDocumentInterface().setClickMode(RAction.PickCoordinate);
    this.setCrosshairCursor();

    var appWin = RMainWindowQt.getMainWindow();
    switch (this.state) {
    case LineBoxJoint.State.SettingCorner1:
        var trCorner1 = qsTr("First point");
        this.setCommandPrompt(trCorner1);
        this.setLeftMouseTip(trCorner1);
        this.setRightMouseTip(EAction.trCancel);
        break;

    case LineBoxJoint.State.SettingCorner2:
        var trCorner2 = qsTr("Second point");
        this.setCommandPrompt(trCorner2);
        this.setLeftMouseTip(trCorner2);
        this.setRightMouseTip(EAction.trDone);
        break;
    }

    EAction.showSnapTools();
};

LineBoxJoint.prototype.escapeEvent = function() {
    switch (this.state) {
    case LineBoxJoint.State.SettingCorner1:
        EAction.prototype.escapeEvent.call(this);
        break;

    case LineBoxJoint.State.SettingCorner2:
        this.setState(LineBoxJoint.State.SettingCorner1);
        break;
    }
};

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

    switch (this.state) {
    case LineBoxJoint.State.SettingCorner1:
        this.corner1 = event.getModelPosition();
        if (!preview) {
            di.setRelativeZero(this.corner1);
            //di.repaintViews();
            this.setState(LineBoxJoint.State.SettingCorner2);
        }
        break;

    case LineBoxJoint.State.SettingCorner2:
        this.corner2 = event.getModelPosition();
        if (preview) {
            this.updatePreview();
        }
        else {
            var op = this.getOperation(false);
            if (!isNull(op)) {
                di.applyOperation(op);
                di.setRelativeZero(this.corner2);
                this.setState(LineBoxJoint.State.SettingCorner1);
            }
        }
        break;
    }
};

LineBoxJoint.prototype.getOperation = function(preview) {
    if (isNull(this.corner1) || isNull(this.corner2)) {
        return undefined;
    }
    if (!isNumberGreaterZero(this.fingerHeight) || !isNumberGreaterZero(this.slotRatio) || !isNumberGreaterZero(this.fingerLength)) {
        return undefined;
    }

    var c1 = this.corner1;
    var c2 = this.corner2;
    var c3 = c2;

    var len = this.corner1.getDistanceTo(this.corner2);
    var ang = this.corner1.getAngleTo(this.corner2);

    var slotLength = this.fingerLength * this.slotRatio;
    var nFingers = Math.ceil((len-slotLength)/(this.fingerLength+slotLength));
    if (!isNumber(nFingers)) {
        return undefined;
    }

    slotLength = (len-(nFingers*this.fingerLength))/(nFingers+1);

    var op = new RAddObjectsOperation();

    var fingerIn = new RVector();
    fingerIn.setPolar(this.fingerHeight, ang-Math.PI/2.0);

    var fingerOut = new RVector();
    fingerOut.setPolar(this.fingerHeight, ang+Math.PI/2.0);

    var fingerEdge = new RVector();
    fingerEdge.setPolar(this.fingerLength, ang);

    var slotEdge = new RVector();
    slotEdge.setPolar(slotLength, ang);


    switch (this.fingerStyle) {
    case 0:
        c2 = c1;
        for (var n=nFingers; n>0; n--) {
            c1 = c2; c2 = c2.operator_add(slotEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerIn);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerOut);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
        }
        c1 = c2; c2 = c2.operator_add(slotEdge);
        op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
        break;
    case 1:
        c2 = c1;
        c1 = c2; c2 = c2.operator_add(fingerIn);
        for (var n=nFingers; n>0; n--) {
            c1 = c2; c2 = c2.operator_add(slotEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerOut);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c1 = c2; c2 = c2.operator_add(fingerIn);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
        }
        c1 = c2; c2 = c2.operator_add(slotEdge);
        op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
        break;
    case 2:
        c2 = c1;
        for (var n=nFingers; n>0; n--) {
            c1 = c2; c2 = c2.operator_add(slotEdge);
            c1 = c2; c2 = c2.operator_add(fingerEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c2)));
            c3 = c1; c3 = c3.operator_add(fingerIn);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c3)));
            c1 = c3; c3 = c3.operator_add(fingerEdge);
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c1, c3)));
            op.addObject(new RLineEntity(this.getDocument(), new RLineData(c3, c2)));
        }
        break;
    }

    return op;
};

LineBoxJoint.prototype.slotFingerHeightChanged = function(value) {
    this.fingerHeight = value;
    this.updatePreview(true);
};

LineBoxJoint.prototype.slotFingerLengthChanged = function(value) {
    this.fingerLength = value;
    this.updatePreview(true);
};

LineBoxJoint.prototype.slotSlotRatioChanged = function(value) {
    this.slotRatio = value;
    this.updatePreview(true);
};

LineBoxJoint.prototype.slotFingerStyleChanged = function(value) {
    this.fingerStyle = value;
    this.updatePreview(true);
};