/*  library for creating CuVoodoo Land Pattern (cvlp) JSON files and render them
    Copyright (C) 2015 King Kévin <kingkevin@cuvoodoo.info>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

// create a set of elements with an line element
function cvlp_line(x1, y1, x2, y2, thickness) {
	var line = {}
    line.type = "line"
	line.x1 = x1
	line.y1 = y1
	line.x2 = x2
	line.y2 = y2
	line.thickness = thickness
	return [line]
}

// create a set of elements with an arc element
// arc goes angle degrees clockwise from start
function cvlp_arc(x, y, radius, start, angle, thickness) {
	var arc = {}
	arc.type = "arc"
	arc.x = x
	arc.y = y
	arc.radius = radius
	arc.start = start
	arc.angle = angle
	arc.thickness = thickness
	return [arc]
}

// create a set of elements with an pad element
function cvlp_pad(number, x, y, width, height, round) {
	var pad = {}
    pad.type = "pad"
	pad.number = number
	pad.x = x
	pad.y = y
	pad.width = width
	pad.height = height
	pad.round = round || true
	return [pad]
}

// create a set of elements with an pin element
function cvlp_pin(number, x, y, thickness, hole, round) {
	var pin = {}
	pin.type = "pin"
	pin.number = number
	pin.x = x
	pin.y = y
	pin.thickness = thickness
	pin.hole = hole
	pin.round = round || true
	return [pin]
}

// create a set of elements representing a chain of lines
// provide a list of [x,y] coordinates
function cvlp_polyline(points, thickness, closed) {
	var polyline = []
	for (var i = 0; i < points.length - 1; i++) {
		polyline = polyline.concat(cvlp_line(points[i][0], points[i][1], points[i+1][0], points[i+1][1], thickness))
	}
	if (closed || false) {
		if (points[0][0]!=points[points.length - 1][0] && points[0][1] != points[points.length - 1][1]) {
			polyline = polyline.concat(cvlp_line(points[points.length - 1][0], points[points.length - 1][1], points[0][0], points[0][1], thickness))
		}
	}
	return polyline
}

// create a set of elements representing a rectangle
// provide top corner, size, an radius of corner
function cvlp_rectangle(x, y, width, height, thickness, radius) {
	var rectangle = []
	rectangle = rectangle.concat(cvlp_line(x + radius, y, x + width - radius, y, thickness))
	rectangle = rectangle.concat(cvlp_line(x + width, y + radius, x + width, y + height - radius, thickness))
	rectangle = rectangle.concat(cvlp_line(x + width - radius, y + height, x + radius, y + height, thickness))
	rectangle = rectangle.concat(cvlp_line(x, y + height - radius, x, y + radius, thickness))
	if (radius !== 'undefined' && radius != 0) {
		rectangle = rectangle.concat(cvlp_arc(x + radius, y + radius, radius, 180, 90, thickness))
		rectangle = rectangle.concat(cvlp_arc(x + width - radius, y + radius, radius, 270, 90, thickness))
		rectangle = rectangle.concat(cvlp_arc(x + width - radius, y + width - radius, radius, 0, 90, thickness))
		rectangle = rectangle.concat(cvlp_arc(x + radius, y + width - radius, radius, 90, 90, thickness))
	}
	return rectangle
}

// convert value from one unit to another
// units allowed: mm, in, mil
// returns converted value, on null if unknown unit
function convert_unit(value, from, to) {
// don't convert if the unit is the same (avoid calculation imprecisions)
	if (from==to) {
		return value;
	}
	// convert to µm
	var mum = 0;
	switch (from) {
		case 'mm':
			mum = value * 1000;
			break;
		case 'in':
			mum = value * 1000 * 25.40;
			break;
		case 'mil':
			mum = value * 25.40;
			break;
		default:
			return null;
	}
	switch (to) {
		case 'mm':
			mum = mum / 1000;
			break;
		case 'in':
			mum = mum / 1000 / 25.40;
			break;
		case 'mil':
			mum = mum / 25.40;
			break;
		default:
			return null;
	}
	return mum;
}

// convert JSON to SVG
function json2svg(json) {
	// create svg
	var svgNS = "http://www.w3.org/2000/svg"
	svg = document.createElementNS(svgNS, 'svg')
	svg.setAttribute('xmlns', svgNS)
	svg.setAttribute('version', 1.1)
	svg.setAttribute('xmlns:inkscape', 'http://www.inkscape.org/namespaces/inkscape')
	// set unit
	if (json.unit == "mil") { // mil units are not supported in SVG, convert to inch
		svg.setAttribute('height', (json.height / 1000) + 'in')
		svg.setAttribute('width', (json.width/1000) + 'in')
	} else {
		svg.setAttribute('height', json.height + '' + json.unit)
		svg.setAttribute('width', json.width + '' + json.unit)
	}
	svg.setAttribute('viewBox', '0 0 ' + json.width + ' ' + json.height)
	// add info
	var svg_title = document.createElementNS(svgNS, 'title');
	svg_title.textContent = json.name;
	svg.appendChild(svg_title);
	// add layers
	layers_desc = [ { name: 'copper', stroke: 'gray', fill: 'gray'},
	                { name: 'hole', stroke: 'none', fill: 'white'},
	                { name: 'silkscreen', stroke: 'black', fill: 'none', 'stroke-linecap': 'round'}
	]
	layers = []
	for (layer_i in layers_desc) {
		var layer_desc = layers_desc[layer_i]
		var layer = document.createElementNS(svgNS, 'g')
		layer.setAttribute('inkscape:groupmode', 'layer')
		layer.setAttribute('inkscape:label', layer_desc.name)
		for (key in layer_desc) {
			layer.setAttribute(key, layer_desc[key])
		}
		svg.appendChild(layer)
		layers[layer_desc.name] = layer
	}
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		switch (element.type) {
			case 'line':
				var line = document.createElementNS(svgNS, 'line')
				line.setAttribute('x1', element.x1)
				line.setAttribute('y1', element.y1)
				line.setAttribute('x2', element.x2)
				line.setAttribute('y2', element.y2)
				line.style.setProperty('stroke-width', element.thickness)
				layers['silkscreen'].appendChild(line)
				break
			case 'arc':
				element.start = (element.start + 360) % 360
				element.stop = (element.stop + 360) % 360
				var arc = null
				if (element.start == element.stop) {
					arc = document.createElementNS(svgNS, 'circle')
					arc.setAttribute('cx', element.x)
					arc.setAttribute('cy', element.y)
					arc.setAttribute('r', element.radius)
				} else {
					var x1 = element.x + element.radius * Math.cos(((-1 * element.start) % 360) / 360.0 * Math.PI * 2)
					var y1 = element.y - element.radius * Math.sin(((-1 * element.start) % 360) / 360.0 * Math.PI * 2)
					var x2 = element.x + element.radius * Math.cos(((-1 * (element.start + element.angle)) % 360) / 360.0 * Math.PI * 2)
					var y2 = element.y - element.radius * Math.sin(((-1 * (element.start + element.angle)) % 360) / 360.0 * Math.PI * 2)
					arc = document.createElementNS(svgNS, 'path')
					arc.setAttribute('d', 'M ' + x1 + ' ' + y1 + ' A ' + element.radius + ' ' + element.radius + ' 0 ' + ((element.angle) % 360 > 180 ? '1' : '0') + ' 1 ' + x2 + ' ' + y2 + ' ')
				}
				arc.style.setProperty('stroke-width', element.thickness)
				layers['silkscreen'].appendChild(arc)
				break
			case 'pad':
				var copper = document.createElementNS(svgNS, 'rect')
				copper.style.setProperty('stroke-width', 0)
				copper.setAttribute('x', element.x - element.width / 2)
				copper.setAttribute('y', element.y - element.height / 2)
				copper.setAttribute('width', element.width)
				copper.setAttribute('height', element.height)
				if (element.round) {
					copper.setAttribute('rx', Math.min(element.width, element.height) / 2)
					copper.setAttribute('ry', Math.min(element.width, element.height) / 2)
				} else {
					copper.setAttribute('rx', 0)
					copper.setAttribute('ry', 0)
				}
				layers['copper'].appendChild(copper)
				break
			case 'pin':
				break
				var copper = document.createElementNS(svgNS, 'rect')
				copper.style.setProperty('stroke-width', 0)
				copper.setAttribute('x', element.x - element.thickness / 2)
				copper.setAttribute('y', element.y - element.thickness / 2)
				copper.setAttribute('height', element.thickness)
				copper.setAttribute('width',element.thickness)
				if (element.round) {
					copper.setAttribute('rx', element.thickness / 2)
					copper.setAttribute('ry', element.thickness / 2)
				} else {
					copper.setAttribute('rx', 0)
					copper.setAttribute('ry', 0)
				}
				layers['copper'].appendChild(copper)
				var hole = document.createElementNS(svgNS, 'circle')
				hole.style.setProperty('stroke-width', 0)
				hole.setAttribute('cx', element.x)
				hole.setAttribute('cy', element.y)
				hole.setAttribute('r', element.hole / 2)
				layers['hole'].appendChild(hole)
				break
			default:
				console.log('unknown element type: ' + element.type)
		}
	}
	return svg
}

// convert CuVoodoo Land Pattern JSON to gEDA pcb footprint
function json2pcb(json) {
	// create file and add info
	var pcb = ''
	pcb += '# footprint generated from CuVoodoo Land Pattern\n'
	pcb += '# author: ' + json.author + '\n'
	pcb += '# version: ' + json.version + '\n'
	pcb += '# date: ' + json.date + '\n'
	pcb += 'Element["" "' + json.name + '" "" "" 0 0 0 0 0 100 ""]\n'
	pcb += '(\n'
	// add element parts
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		switch (element.type) {
			case 'line':
				pcb += 'ElementLine[' + element.x1 + '' + json.unit + ' ' + element.y1 + '' + json.unit + ' ' + element.x2 + '' + json.unit + ' ' + element.y2 + '' + json.unit + ' ' + element.thickness + '' + json.unit + ']\n'
				break
			case 'arc':
				pcb += 'ElementArc[' + element.x + '' + json.unit + ' ' + element.y + '' + json.unit + ' ' + element.radius + '' + json.unit + ' ' + element.radius + '' + json.unit + ' ' + ((((180 - element.start) % 360) + 360) % 360) + ' ' + (-1 * (element.angle)) + ' ' + element.thickness + '' + json.unit + ']\n'
				break
			case 'pad':
				var x1, y1, x2, y2, thickness
				if (element.width > element.height) {
					x1 = element.x - element.width / 2 + element.height / 2
					y1 = element.y
					x2 = element.x + element.width / 2 - element.height / 2
					y2 = element.y
					thickness = element.height
				} else {
					x1 = element.x
					y1 = element.y - element.height / 2 + element.width / 2
					x2 = element.x
					y2 = element.y + element.height / 2 - element.width / 2
					thickness = element.width
				}
				pcb += 'Pad[' + x1 + '' + json.unit + ' ' + y1 + '' + json.unit + ' ' + x2 + '' + json.unit + ' ' + y2 + '' + json.unit + ' ' + thickness + '' + json.unit + ' ' + 0 + '' + json.unit + ' ' + thickness + '' + json.unit + ' "" "' + element.number + '" "'
				if (!element.round) {
					pcb += 'square'
				}
				pcb += '"]\n'
				break
			case 'pin':
				pcb += 'Pin[' + element.x + '' + json.unit + ' ' + element.y + '' + json.unit + ' ' + element.thickness + '' + json.unit + ' ' + 0 + '' + json.unit + ' ' + thickness + '' + json.unit + ' ' + element.hole + '' + json.unit + ' "" "' + element.number + '" "'
				if (!element.round) {
					pcb += 'square'
				}
				pcb += '"]\n'
				break
			default:
				console.log('unknown element type: ' + element.type)
		}
	}
	pcb += ')\n'
	return pcb
}

//  convert CuVoodoo Land Pattern JSON to KiCad s-expression footprint module/file
function json2kicad(json) {
	// create file and add info
	var kicad = ''
	kicad += '# footprint generated from CuVoodoo Land Pattern\n'
	kicad += '# author: ' + json.author + '\n'
	kicad += '# version: ' + json.version + '\n'
	kicad += '# date: ' + json.date + '\n'
	kicad += '(module "' + json.name + '" (layer F.Cu)\n'
	// add element parts
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		switch (element.type) {
			case 'line':
				kicad += '(fp_line (start ' + convert_unit(element.x1, json.unit, 'mm') + ' ' + convert_unit(element.y1, json.unit, 'mm') + ') (end ' + convert_unit(element.x2, json.unit, 'mm') + ' ' + convert_unit(element.y2, json.unit , 'mm') + ') (layer F.SilkS) (width ' + convert_unit(element.thickness, json.unit, 'mm') + '))\n'
				break
			case 'arc':
				kicad += '(fp_arc (start ' + convert_unit(element.x, json.unit, 'mm') + ' ' + convert_unit(element.y, json.unit, 'mm') + ') (end ' + convert_unit((element.x + element.radius * Math.cos(((-1 * element.start) % 360) / 360.0 * Math.PI * 2)), json.unit, 'mm') + ' ' + convert_unit((element.y - element.radius * Math.sin(((-1 * element.start) % 360) / 360.0 * Math.PI * 2)), json.unit, 'mm') + ') (angle ' + element.angle + ') (layer F.SilkS) (width ' + convert_unit(element.thickness, json.unit, 'mm') + '))\n'
				break
			case 'pad':
				kicad += '(pad "' + element.number + '" smd '
				if (element.round) {
					kicad += 'oval'
				} else {
					kicad += 'rect'
				}
				kicad += ' (at ' + convert_unit(element.x, json.unit, 'mm') + ' ' + convert_unit(element.y, json.unit, 'mm') + ')'
				kicad += ' (size ' + convert_unit(element.width, json.unit, 'mm') + ' ' + convert_unit(element.height, json.unit, 'mm') + ')'
				kicad += ' (layers F.Cu F.Paste F.Mask)'
				kicad += ')\n'
				break
			case 'pin':
				var x = (element.x1 + element.x2) / 2
				var y = (element.y1 + element.y2) / 2
				var length = Math.sqrt(Math.pow(element.x2 - element.x1, 2) + Math.pow(element.y2 - element.y1, 2))
				var angle = Math.atan2(element.y2 - element.y1, element.x2 - element.x1) * 180 / Math.PI;
				kicad += '(pad "' + element.number + '" smd '
				if (element.round) {
					kicad += 'oval'
				} else {
					kicad += 'rect'
				}
				kicad += ' (at ' + convert_unit(x, json.unit, 'mm') + ' ' + convert_unit(y, json.unit, 'mm') + ' ' + angle + ')'
				kicad += ' (size ' + convert_unit(length, json.unit, 'mm') + ' ' + convert_unit(element.thickness, json.unit, 'mm') + ')'
				kicad += ' (drill ' + convert_unit(element.hole, json.unit, 'mm')
				kicad += ' (layers F.Cu F.Paste F.Mask)'
				kicad += ')\n'
				break
			default:
				console.log('unknown element type: ' + element.type)
		}
	}
	kicad += ')\n'
	return kicad
}

// convert JSON to eagle library
function json2eagle(json) {
	// create eagle xml library
	var docType = document.implementation.createDocumentType('eagle', 'SYSTEM', 'eagle.dtd')
	var xml = document.implementation.createDocument('', 'eagle', docType)
	xml.documentElement.setAttribute('version','6.0')
	var comment = xml.createComment('footprint generated from CuVoodoo Land Pattern, author: ' + json.author + ', version: ' + json.version + ', date: ' + json.date)
	xml.documentElement.appendChild(comment)
	var drawing = xml.createElement('drawing')
	xml.documentElement.appendChild(drawing)
	// add layers
	var layers = xml.createElement('layers')
	drawing.appendChild(layers)
	layers_desc = [ { number: 1, name: 'Top', color: 4, fill: 1, visible: 'yes', active: 'yes'},
	                { number: 17, name: 'Pads', color: 2, fill: 1, visible: 'yes', active: 'yes'},
	                { number: 21, name: 'tPLace', color: 7, fill: 1, visible: 'yes', active: 'yes'},
	]
	for (layer_i in layers_desc) {
		var layer_desc = layers_desc[layer_i]
		var layer = xml.createElement('layer')
		for (key in layer_desc) {
			layer.setAttribute(key,layer_desc[key])
		}
		layers.appendChild(layer)
	}
	// create library
	var library = xml.createElement('library')
	drawing.appendChild(library)
	// add description
	var description = xml.createElement('description')
	description.textContent = json.name
	library.appendChild(description)
	// add package
	var packages = xml.createElement('packages')
	library.appendChild(packages)
	var packag = xml.createElement('package')
	packag.setAttribute('name','OSHW')
	packages.appendChild(packag)
	var desc =  xml.createElement('description')
	desc.textContent = json.name
	packag.appendChild(desc)
	// add element parts
	// note: in eagle the origin is the bottom left corner (negate y to be compatible with the json coordinate system)
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		switch (element.type) {
			case 'line':
				var line = xml.createElement('wire')
				line.setAttribute('x1', convert_unit(element.x1, json.unit, 'mm'))
				line.setAttribute('y1', convert_unit(-1 * element.y1, json.unit, 'mm'))
				line.setAttribute('x2', convert_unit(element.x2, json.unit, 'mm'))
				line.setAttribute('y2', convert_unit(-1 * element.y2, json.unit, 'mm'))
				line.setAttribute('width', convert_unit(element.thickness, json.unit, 'mm'))
				line.setAttribute('layer', '21')
				packag.appendChild(line)
				break
			case 'arc':
				var wire = xml.createElement('wire')
				wire.setAttribute('x1', convert_unit(element.x + element.radius * Math.cos(((-1 * element.start) % 360) / 360.0 * Math.PI * 2), json.unit, 'mm'))
				wire.setAttribute('y1', convert_unit(-1 * element.y + element.radius * Math.sin(((-1 * element.start) % 360) / 360.0 * Math.PI * 2), json.unit, 'mm'))
				wire.setAttribute('x2', convert_unit(element.x + element.radius * Math.cos(((-1 * (element.start + element.angle)) % 360) / 360.0 * Math.PI * 2), json.unit, 'mm'))
				wire.setAttribute('y2', convert_unit(-1 * element.y + element.radius * Math.sin(((-1 * (element.start + element.angle)) % 360) / 360.0 * Math.PI * 2), json.unit, 'mm'))
				wire.setAttribute('curve',-1 * element.angle)
				wire.setAttribute('width', convert_unit(element.thickness, json.unit,'mm'))
				wire.setAttribute('layer', '21')
				wire.setAttribute('cap', 'round')
				packag.appendChild(wire)
				break
			case 'pad':
				var pad = xml.createElement('smd')
				pad.setAttribute('name', element.number)
				pad.setAttribute('x', convert_unit(element.x, json.unit, 'mm'))
				pad.setAttribute('y', convert_unit(-1 * element.y, json.unit, 'mm'))
				pad.setAttribute('dx', convert_unit(element.width, json.unit, 'mm'))
				pad.setAttribute('dy', convert_unit(element.height, json.unit, 'mm'))
				pad.setAttribute('layer', '1')
				if (element.round) {
					pad.setAttribute('roundness', 100)
				} else {
					pad.setAttribute('roundness', 0)
				}
				packag.appendChild(pad)
				break
			case 'pin':
				var pin = xml.createElement('pad')
				pin.setAttribute('name', element.number)
				pin.setAttribute('x', convert_unit(element.x, json.unit, 'mm'))
				pin.setAttribute('y', convert_unit(-1 * element.y, json.unit, 'mm'))
				pin.setAttribute('drill', convert_unit(element.hole, json.unit, 'mm'))
				pin.setAttribute('diameter', convert_unit(element.thickness, json.unit, 'mm'))
				pin.setAttribute('layer', '17')
				if (element.round) {
					pin.setAttribute('shape', 'round')
				} else {
					pin.setAttribute('shape', 'square')
				}
				packag.appendChild(pin)
				break
			default:
				console.log('unknown element type: ' + element.type)
		}
	}
	return xml
}

// convert CuVoodoo Land Pattern JSON to coralEDA subscircuit
function json2subc(json)
{
	// create file and add info
	var subc = ''
	subc += '# footprint generated from CuVoodoo Land Pattern\n'
	subc += '# author: ' + json.author + '\n'
	subc += '# version: ' + json.version + '\n'
	subc += '# date: ' + json.date + '\n'

	id = 1 // global subc id
	subc += 'li:pcb-rnd-subcircuit-v6 {\n'
	subc += ' ha:subc.' + (id++) + ' {\n'
	subc += '  uid = any_24_ASCII_characters_\n'
	subc += '  ha:attributes {\n'
	subc += '   footprint = ' + json.name + '\n'
	subc += '  }\n'
	subc += '  ha:data {\n'

	// try to group the pads/pins
	function element_generic(element) {
		generic = JSON.parse(JSON.stringify(element))
		delete generic.x
		delete generic.y
		delete generic.number
		return generic
	}

	// get pins/pads
	padstacks = []
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		if (element.type == 'pin' || element.type == 'pad') {
			padstacks.push(element_generic(element))
		}
	}
	padstacks = padstacks.map((value) => JSON.stringify(value))
	padstacks = padstacks.filter((value, index, self) => self.indexOf(value) == index)
	padstacks = padstacks.map((value) => JSON.parse(value))

	// add padstacks prototypes
	id = 2
	subc += '   li:padstack_prototypes {\n'
	for (var padstack_i in padstacks) {
		var padstack = padstacks[padstack_i]
		switch (padstack.type) {
			case 'pad':
				subc += '    ha:ps_proto_v6.' + (id++) + ' {\n'
				subc += '     htop = 0\n'
				subc += '     hbottom = 0\n'
				subc += '     hdia = 0\n'
				subc += '     hplated = 0\n'
				subc += '     li:shape {\n'
				var line = ''
				line += '       ha:ps_line {\n'
				var x1, y1, x2, y2, thickness
				if (padstack.width > padstack.height) {
					x1 = - padstack.width / 2 + padstack.height / 2
					y1 = 0
					x2 = padstack.width / 2 - padstack.height / 2
					y2 = 0
					thickness = padstack.height
				} else {
					x1 = 0
					y1 = - padstack.height / 2 + padstack.width / 2
					x2 = 0
					y2 = padstack.height / 2 - padstack.width / 2
					thickness = padstack.width
				}
				line += '        x1 = ' + x1 + json.unit + '\n'
				line += '        y1 = ' + y1 + json.unit + '\n'
				line += '        x2 = ' + x2 + json.unit + '\n'
				line += '        y2 = ' + y2 + json.unit + '\n'
				line += '        thickness =' + thickness + json.unit + '\n'
				line += '        square = ' + (padstack.round ? '0' : '1') + '\n'
				line += '       }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += line
				subc += '       ha:layer_mask {\n'
				subc += '        top = 1\n'
				subc += '        copper = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += line
				subc += '       ha:layer_mask {\n'
				subc += '        top = 1\n'
				subc += '        mask = 1\n'
				subc += '       }\n'
				subc += '       ha:combining {\n'
				subc += '        sub = 1\n'
				subc += '        auto = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += line
				subc += '       ha:layer_mask {\n'
				subc += '        top = 1\n'
				subc += '        paste = 1\n'
				subc += '       }\n'
				subc += '       ha:combining {\n'
				subc += '        auto = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '     }\n'
				subc += '    }\n'
				break
			case 'pin':
				subc += '    ha:ps_proto_v6.' + (id++) + ' {\n'
				subc += '     htop = 0\n'
				subc += '     hbottom = 0\n'
				subc += '     hdia = ' + element.hole + json.unit + '\n'
				subc += '     hplated = ' + (element.thickness > element.hole ? '1' : '0') + '\n'
				subc += '     li:shape {\n'
				var circle = ''
				circle += '       ha:ps_circ {\n'
				circle += '        x = 0\n'
				circle += '        y = 0\n'
				circle += '        dia = ' + element.thickness + json.unit + '\n'
				circle += '       }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += circle
				subc += '       ha:layer_mask {\n'
				subc += '        top = 1\n'
				subc += '        copper = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += circle
				subc += '       ha:layer_mask {\n'
				subc += '        top = 1\n'
				subc += '        mask = 1\n'
				subc += '       }\n'
				subc += '       ha:combining {\n'
				subc += '        sub = 1\n'
				subc += '        auto = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += circle
				subc += '       ha:layer_mask {\n'
				subc += '        intern = 1\n'
				subc += '        copper = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += circle
				subc += '       ha:layer_mask {\n'
				subc += '        bottom = 1\n'
				subc += '        copper = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '      ha:ps_shape_v4 {\n'
				subc += '       clearance = 0\n'
				subc += circle
				subc += '       ha:layer_mask {\n'
				subc += '        bottom = 1\n'
				subc += '        mask = 1\n'
				subc += '       }\n'
				subc += '       ha:combining {\n'
				subc += '        sub = 1\n'
				subc += '        auto = 1\n'
				subc += '       }\n'
				subc += '      }\n'
				subc += '     }\n'
				subc += '    }\n'
				break
		}
	}
	subc += '   }\n' // end padstack_prototypes

	// add pads/pins
	subc += '   li:objects {\n'
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		if (element.type != 'pin' && element.type != 'pad') {
			continue
		}
		padstack = padstacks.map((value) => JSON.stringify(value)).indexOf(JSON.stringify(element_generic(element)))
		if (padstack < 0) {
			continue
		}
		subc += '    ha:padstack_ref.' + (id++) + '{\n'
		subc += '     proto = ' + (2 + padstack) + '\n'
		subc += '     rot = 0\n'
		subc += '     x = ' + element.x + json.unit + '\n'
		subc += '     y = ' + element.y + json.unit + '\n'
		subc += '     ha:attributes {\n'
		subc += '      term = ' + element.number + '\n'
		subc += '      name = ' + element.number + '\n'
		subc += '     }\n'
		subc += '    }\n'
	}
	subc += '   }\n' // end objects

	// add silkscreen
	subc += '   li:layers {\n'
	subc += '    ha:top-silkscreen {\n'
	subc += '     lid = 1\n'
	subc += '     ha:type {\n'
	subc += '      top = 1\n'
	subc += '      silk = 1\n'
	subc += '     }\n'
	subc += '     li:objects {\n'
	for (var element_i in json.elements) {
		var element = json.elements[element_i]
		switch (element.type) {
			case 'line':
				subc += '      ha:line.' + (id++) + '{\n'
				subc += '       clearance = 0\n'
				subc += '       x1 = ' + element.x1 + json.unit + '\n'
				subc += '       y1 = ' + element.y1 + json.unit + '\n'
				subc += '       x2 = ' + element.x2 + json.unit + '\n'
				subc += '       y2 = ' + element.y2 + json.unit + '\n'
				subc += '       thickness = ' + element.thickness + json.unit + '\n'
				subc += '      }\n'
				break
			case 'arc':
				subc += '      ha:arc.' + (id++) + '{\n'
				subc += '       clearance = 0\n'
				subc += '       x = ' + element.x + json.unit + '\n'
				subc += '       y = ' + element.y + json.unit + '\n'
				subc += '       width = ' + element.radius + json.unit + '\n'
				subc += '       height = ' + element.radius + json.unit + '\n'
				subc += '       thickness = ' + element.thickness + json.unit + '\n'
				subc += '       astart = ' + ((element.start * -1 + 180) % 360) + '\n'
				subc += '       adelta = ' + (element.angle * -1) + '\n'
				subc += '      }\n'
				break
		}
		if (element.type != 'pin' && element.type != 'pad') {
			continue
		}
		padstack = padstacks.map((value) => JSON.stringify(value)).indexOf(JSON.stringify(element_generic(element)))
		if (padstack < 0) {
			continue
		}
		subc += '    ha:padstack_ref.' + (id++) + '{\n'
		subc += '     proto = ' + (2 + padstack) + '\n'
		subc += '     rot = 0\n'
		subc += '     x = ' + element.x + json.unit + '\n'
		subc += '     y = ' + element.y + json.unit + '\n'
		subc += '     ha:attributes {\n'
		subc += '      term = ' + element.number + '\n'
		subc += '      name = ' + element.number + '\n'
		subc += '     }\n'
		subc += '    }\n'
	}
	subc += '     }\n' // end objects
	subc += '    }\n' // end silkscreen
	subc += '   }\n' // end layers

	subc += '  }\n' // end data
	subc += ' }\n' // end subc
	subc += '}\n' // end pcb-rnd-subcircuit-v6

	return subc
}