var ShapeExpressionInterface = (function(){

    function iterateElements(shapes,view, propertyGroup){
        var arr = [];
        var i, len = shapes ? shapes.length : 0;
        for(i=0;i<len;i+=1){
            if(shapes[i].ty == 'gr'){
                arr.push(groupInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'fl'){
                arr.push(fillInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'st'){
                arr.push(strokeInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'tm'){
                arr.push(trimInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'tr'){
                //arr.push(transformInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'el'){
                arr.push(ellipseInterfaceFactory(shapes[i],view[i],propertyGroup));
            }else if(shapes[i].ty == 'sr'){
                arr.push(starInterfaceFactory(shapes[i],view[i],propertyGroup));
            } else if(shapes[i].ty == 'sh'){
                arr.push(ShapePathInterface(shapes[i],view[i],propertyGroup));
            } else if(shapes[i].ty == 'rc'){
                arr.push(rectInterfaceFactory(shapes[i],view[i],propertyGroup));
            } else if(shapes[i].ty == 'rd'){
                arr.push(roundedInterfaceFactory(shapes[i],view[i],propertyGroup));
            } else if(shapes[i].ty == 'rp'){
                arr.push(repeaterInterfaceFactory(shapes[i],view[i],propertyGroup));
            }
        }
        return arr;
    }

    function contentsInterfaceFactory(shape,view, propertyGroup){
       var interfaces;
       var interfaceFunction = function _interfaceFunction(value){
           var i = 0, len = interfaces.length;
            while(i<len){
                if(interfaces[i]._name === value || interfaces[i].mn === value || interfaces[i].propertyIndex === value || interfaces[i].ix === value || interfaces[i].ind === value){
                   return interfaces[i];
                }
                i+=1;
            }
            if(typeof value === 'number'){
               return interfaces[value-1];
            }
       };
       interfaceFunction.propertyGroup = function(val){
            val = val === undefined ? 1 : val
           if(val <= 0){
               return interfaceFunction;
           } else{
               return propertyGroup(val-1);
           }
       };
       interfaces = iterateElements(shape.it, view.it, interfaceFunction.propertyGroup);
       interfaceFunction.numProperties = interfaces.length;
       var transformInterface = transformInterfaceFactory(shape.it[shape.it.length - 1],view.it[view.it.length - 1],interfaceFunction.propertyGroup);
       interfaceFunction.transform = transformInterface;
       interfaceFunction.propertyIndex = shape.cix;
       interfaceFunction._name = shape.nm;

       return interfaceFunction;
   }

    function groupInterfaceFactory(shape,view, propertyGroup){
        var interfaceFunction = function _interfaceFunction(value){
            switch(value){
                case 'ADBE Vectors Group':
                case 'Contents':
                case 2:
                    return interfaceFunction.content;
                //Not necessary for now. Keeping them here in case a new case appears
                //case 'ADBE Vector Transform Group':
                //case 3:
                default:
                    return interfaceFunction.transform;
            }
        };
        interfaceFunction.propertyGroup = function(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else{
                return propertyGroup(val-1);
            }
        };
        var content = contentsInterfaceFactory(shape,view,interfaceFunction.propertyGroup);
        var transformInterface = transformInterfaceFactory(shape.it[shape.it.length - 1],view.it[view.it.length - 1],interfaceFunction.propertyGroup);
        interfaceFunction.content = content;
        interfaceFunction.transform = transformInterface;
        Object.defineProperty(interfaceFunction, '_name', {
            get: function(){
                return shape.nm;
            }
        });
        //interfaceFunction.content = interfaceFunction;
        interfaceFunction.numProperties = shape.np;
        interfaceFunction.propertyIndex = shape.ix;
        interfaceFunction.nm = shape.nm;
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function fillInterfaceFactory(shape,view,propertyGroup){
        function interfaceFunction(val){
            if(val === 'Color' || val === 'color'){
                return interfaceFunction.color;
            } else if(val === 'Opacity' || val === 'opacity'){
                return interfaceFunction.opacity;
            }
        }
        Object.defineProperties(interfaceFunction, {
            'color': {
                get: ExpressionPropertyInterface(view.c)
            },
            'opacity': {
                get: ExpressionPropertyInterface(view.o)
            },
            '_name': { value: shape.nm },
            'mn': { value: shape.mn }
        });

        view.c.setGroupProperty(PropertyInterface('Color', propertyGroup));
        view.o.setGroupProperty(PropertyInterface('Opacity', propertyGroup));
        return interfaceFunction;
    }

    function strokeInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return ob;
            } else{
                return propertyGroup(val-1);
            }
        }
        function _dashPropertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return dashOb;
            } else{
                return _propertyGroup(val-1);
            }
        }
        function addPropertyToDashOb(i) {
            Object.defineProperty(dashOb, shape.d[i].nm, {
                get: ExpressionPropertyInterface(view.d.dataProps[i].p)
            });
        }
        var i, len = shape.d ? shape.d.length : 0;
        var dashOb = {};
        for (i = 0; i < len; i += 1) {
            addPropertyToDashOb(i);
            view.d.dataProps[i].p.setGroupProperty(_dashPropertyGroup);
        }

        function interfaceFunction(val){
            if(val === 'Color' || val === 'color'){
                return interfaceFunction.color;
            } else if(val === 'Opacity' || val === 'opacity'){
                return interfaceFunction.opacity;
            } else if(val === 'Stroke Width' || val === 'stroke width'){
                return interfaceFunction.strokeWidth;
            }
        }
        Object.defineProperties(interfaceFunction, {
            'color': {
                get: ExpressionPropertyInterface(view.c)
            },
            'opacity': {
                get: ExpressionPropertyInterface(view.o)
            },
            'strokeWidth': {
                get: ExpressionPropertyInterface(view.w)
            },
            'dash': {
                get: function() {
                    return dashOb;
                }
            },
            '_name': { value: shape.nm },
            'mn': { value: shape.mn }
        });

        view.c.setGroupProperty(PropertyInterface('Color', _propertyGroup));
        view.o.setGroupProperty(PropertyInterface('Opacity', _propertyGroup));
        view.w.setGroupProperty(PropertyInterface('Stroke Width', _propertyGroup));
        return interfaceFunction;
    }

    function trimInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        interfaceFunction.propertyIndex = shape.ix;

        view.s.setGroupProperty(PropertyInterface('Start', _propertyGroup));
        view.e.setGroupProperty(PropertyInterface('End', _propertyGroup));
        view.o.setGroupProperty(PropertyInterface('Offset', _propertyGroup));

        function interfaceFunction(val){
            if(val === shape.e.ix || val === 'End' || val === 'end'){
                return interfaceFunction.end;
            }
            if(val === shape.s.ix){
                return interfaceFunction.start;
            }
            if(val === shape.o.ix){
                return interfaceFunction.offset;
            }
        }
        interfaceFunction.propertyIndex = shape.ix;
        interfaceFunction.propertyGroup = propertyGroup;

        Object.defineProperties(interfaceFunction, {
            'start': {
                get: ExpressionPropertyInterface(view.s)
            },
            'end': {
                get: ExpressionPropertyInterface(view.e)
            },
            'offset': {
                get: ExpressionPropertyInterface(view.o)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function transformInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        view.transform.mProps.o.setGroupProperty(PropertyInterface('Opacity', _propertyGroup));
        view.transform.mProps.p.setGroupProperty(PropertyInterface('Position', _propertyGroup));
        view.transform.mProps.a.setGroupProperty(PropertyInterface('Anchor Point', _propertyGroup));
        view.transform.mProps.s.setGroupProperty(PropertyInterface('Scale', _propertyGroup));
        view.transform.mProps.r.setGroupProperty(PropertyInterface('Rotation', _propertyGroup));
        if(view.transform.mProps.sk){
            view.transform.mProps.sk.setGroupProperty(PropertyInterface('Skew', _propertyGroup));
            view.transform.mProps.sa.setGroupProperty(PropertyInterface('Skew Angle', _propertyGroup));
        }
        view.transform.op.setGroupProperty(PropertyInterface('Opacity', _propertyGroup));

        function interfaceFunction(value){
            if(shape.a.ix === value || value === 'Anchor Point'){
                return interfaceFunction.anchorPoint;
            }
            if(shape.o.ix === value || value === 'Opacity'){
                return interfaceFunction.opacity;
            }
            if(shape.p.ix === value || value === 'Position'){
                return interfaceFunction.position;
            }
            if(shape.r.ix === value || value === 'Rotation' || value === 'ADBE Vector Rotation'){
                return interfaceFunction.rotation;
            }
            if(shape.s.ix === value || value === 'Scale'){
                return interfaceFunction.scale;
            }
            if(shape.sk && shape.sk.ix === value || value === 'Skew'){
                return interfaceFunction.skew;
            }
            if(shape.sa && shape.sa.ix === value || value === 'Skew Axis'){
                return interfaceFunction.skewAxis;
            }

        }
        Object.defineProperties(interfaceFunction, {
            'opacity': {
                get: ExpressionPropertyInterface(view.transform.mProps.o)
            },
            'position': {
                get: ExpressionPropertyInterface(view.transform.mProps.p)
            },
            'anchorPoint': {
                get: ExpressionPropertyInterface(view.transform.mProps.a)
            },
            'scale': {
                get: ExpressionPropertyInterface(view.transform.mProps.s)
            },
            'rotation': {
                get: ExpressionPropertyInterface(view.transform.mProps.r)
            },
            'skew': {
                get: ExpressionPropertyInterface(view.transform.mProps.sk)
            },
            'skewAxis': {
                get: ExpressionPropertyInterface(view.transform.mProps.sa)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.ty = 'tr';
        interfaceFunction.mn = shape.mn;
        interfaceFunction.propertyGroup = propertyGroup;
        return interfaceFunction;
    }

    function ellipseInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        interfaceFunction.propertyIndex = shape.ix;
        var prop = view.sh.ty === 'tm' ? view.sh.prop : view.sh;
        prop.s.setGroupProperty(PropertyInterface('Size', _propertyGroup));
        prop.p.setGroupProperty(PropertyInterface('Position', _propertyGroup));
        function interfaceFunction(value){
            if(shape.p.ix === value){
                return interfaceFunction.position;
            }
            if(shape.s.ix === value){
                return interfaceFunction.size;
            }
        }

        Object.defineProperties(interfaceFunction, {
            'size': {
                get: ExpressionPropertyInterface(prop.s)
            },
            'position': {
                get: ExpressionPropertyInterface(prop.p)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function starInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        var prop = view.sh.ty === 'tm' ? view.sh.prop : view.sh;
        interfaceFunction.propertyIndex = shape.ix;
        prop.or.setGroupProperty(PropertyInterface('Outer Radius', _propertyGroup));
        prop.os.setGroupProperty(PropertyInterface('Outer Roundness', _propertyGroup));
        prop.pt.setGroupProperty(PropertyInterface('Points', _propertyGroup));
        prop.p.setGroupProperty(PropertyInterface('Position', _propertyGroup));
        prop.r.setGroupProperty(PropertyInterface('Rotation', _propertyGroup));
        if(shape.ir){
            prop.ir.setGroupProperty(PropertyInterface('Inner Radius', _propertyGroup));
            prop.is.setGroupProperty(PropertyInterface('Inner Roundness', _propertyGroup));
        }

        function interfaceFunction(value){
            if(shape.p.ix === value){
                return interfaceFunction.position;
            }
            if(shape.r.ix === value){
                return interfaceFunction.rotation;
            }
            if(shape.pt.ix === value){
                return interfaceFunction.points;
            }
            if(shape.or.ix === value || 'ADBE Vector Star Outer Radius' === value){
                return interfaceFunction.outerRadius;
            }
            if(shape.os.ix === value){
                return interfaceFunction.outerRoundness;
            }
            if(shape.ir && (shape.ir.ix === value || 'ADBE Vector Star Inner Radius' === value)){
                return interfaceFunction.innerRadius;
            }
            if(shape.is && shape.is.ix === value){
                return interfaceFunction.innerRoundness;
            }

        }

        Object.defineProperties(interfaceFunction, {
            'position': {
                get: ExpressionPropertyInterface(prop.p)
            },
            'rotation': {
                get: ExpressionPropertyInterface(prop.r)
            },
            'points': {
                get: ExpressionPropertyInterface(prop.pt)
            },
            'outerRadius': {
                get: ExpressionPropertyInterface(prop.or)
            },
            'outerRoundness': {
                get: ExpressionPropertyInterface(prop.os)
            },
            'innerRadius': {
                get: ExpressionPropertyInterface(prop.ir)
            },
            'innerRoundness': {
                get: ExpressionPropertyInterface(prop.is)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function rectInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        var prop = view.sh.ty === 'tm' ? view.sh.prop : view.sh;
        interfaceFunction.propertyIndex = shape.ix;
        prop.p.setGroupProperty(PropertyInterface('Position', _propertyGroup));
        prop.s.setGroupProperty(PropertyInterface('Size', _propertyGroup));
        prop.r.setGroupProperty(PropertyInterface('Rotation', _propertyGroup));

        function interfaceFunction(value){
            if(shape.p.ix === value){
                return interfaceFunction.position;
            }
            if(shape.r.ix === value){
                return interfaceFunction.roundness;
            }
            if(shape.s.ix === value || value === 'Size' || value === 'ADBE Vector Rect Size'){
                return interfaceFunction.size;
            }

        }
        Object.defineProperties(interfaceFunction, {
            'position': {
                get: ExpressionPropertyInterface(prop.p)
            },
            'roundness': {
                get: ExpressionPropertyInterface(prop.r)
            },
            'size': {
                get: ExpressionPropertyInterface(prop.s)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function roundedInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        var prop = view;
        interfaceFunction.propertyIndex = shape.ix;
        prop.rd.setGroupProperty(PropertyInterface('Radius', _propertyGroup));

        function interfaceFunction(value){
            if(shape.r.ix === value || 'Round Corners 1' === value){
                return interfaceFunction.radius;
            }

        }
        Object.defineProperties(interfaceFunction, {
            'radius': {
                get: ExpressionPropertyInterface(prop.rd)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    function repeaterInterfaceFactory(shape,view,propertyGroup){
        function _propertyGroup(val){
            val = val === undefined ? 1 : val
            if(val <= 0){
                return interfaceFunction;
            } else {
                return propertyGroup(--val);
            }
        }
        var prop = view;
        interfaceFunction.propertyIndex = shape.ix;
        prop.c.setGroupProperty(PropertyInterface('Copies', _propertyGroup));
        prop.o.setGroupProperty(PropertyInterface('Offset', _propertyGroup));

        function interfaceFunction(value){
            if(shape.c.ix === value || 'Copies' === value){
                return interfaceFunction.copies;
            } else if(shape.o.ix === value || 'Offset' === value){
                return interfaceFunction.offset;
            }

        }
        Object.defineProperties(interfaceFunction, {
            'copies': {
                get: ExpressionPropertyInterface(prop.c)
            },
            'offset': {
                get: ExpressionPropertyInterface(prop.o)
            },
            '_name': { value: shape.nm }
        });
        interfaceFunction.mn = shape.mn;
        return interfaceFunction;
    }

    return function(shapes,view,propertyGroup) {
        var interfaces;
        function _interfaceFunction(value){
            if(typeof value === 'number'){
                value = value === undefined ? 1 : value
                if (value === 0) {
                    return propertyGroup
                } else {
                    return interfaces[value-1];
                }
            } else {
                var i = 0, len = interfaces.length;
                while(i<len){
                    if(interfaces[i]._name === value){
                        return interfaces[i];
                    }
                    i+=1;
                }
            }
        }
        _interfaceFunction.propertyGroup = propertyGroup;
        interfaces = iterateElements(shapes, view, _interfaceFunction);
        _interfaceFunction.numProperties = interfaces.length;
        return _interfaceFunction;
    };
}());