"use strict"

const fs = require("fs")

let circles = {}
let rects = {}
let edges = {}
let mode, name, subname, x, y, w, h, cx, cy, rx, ry, x2, y2
let labels = []

function add_circle(cx, cy, rx, ry) {
	if (!(name in circles))
		circles[name] = {}
	circles[name][subname] = {cx,cy,rx,ry}
}

function add_rect(x, y, w, h) {
	if (!(name in rects))
		rects[name] = {}
	rects[name][subname] = {x,y,w,h}
}

function add_edge(x1, y1, x2, y2) {
	if (name in edges)
		edges[name].push({x1,y1,x2,y2})
	else
		edges[name] = [ {x1,y1,x2,y2} ]
}

function flush() {
	if (mode === 'path') {
		add_edge(x, y, x2, y2)
	}
	if (mode === 'rect') {
		add_rect(x, y, w, h)
	}
	if (mode === 'circle') {
		add_circle( cx, cy, rx, ry )
	}
	x = y = x2 = y2 = w = h = cx = cy = rx = ry = 0
	subname = null
}

function parse_path_data(path) {
	let cx = 0
	let cy = 0
	let abs = 0
	for (let i = 0; i < path.length;) {
		switch (path[i]) {
		case 'M':
			x2 = x = cx = Number(path[i+1])
			y2 = y = cy = Number(path[i+2])
			i += 3
			abs = true
			break
		case 'm':
			x2 = x = cx = cx + Number(path[i+1])
			y2 = y = cy = cy + Number(path[i+2])
			i += 3
			abs = false
			break
		case 'C':
			x2 = cx = Number(path[i+5])
			y2 = cy = Number(path[i+6])
			i += 7
			abs = true
			break
		case 'L':
			i += 1
			abs = true
			break
		case 'H':
			x2 = cx = Number(path[i+1])
			i += 2
			abs = true
			break
		case 'V':
			y2 = cy = Number(path[i+1])
			i += 2
			abs = true
			break
		case 'c':
			x2 = cx = cx + Number(path[i+5])
			y2 = cy = cy + Number(path[i+6])
			i += 7
			abs = false
			break
		case 'l':
			i += 1
			abs = false
			break
		case 'h':
			x2 = cx = cx + Number(path[i+1])
			i += 2
			abs = false
			break
		case 'v':
			y2 = cy = cy + Number(path[i+1])
			i += 2
			abs = false
			break
		default:
			if (abs) {
				x2 = cx = Number(path[i+0])
				y2 = cy = Number(path[i+1])
			} else {
				x2 = cx = cx + Number(path[i+0])
				y2 = cy = cy + Number(path[i+1])
			}
			i += 2
			break
		}
	}
}

for (let line of fs.readFileSync("tools/layout.svg", "utf-8").split("\n")) {
	line = line.trim()
	if (line.startsWith("<rect")) {
		flush()
		mode = "rect"
		x = y = w = h = 0
	}
	else if (line.startsWith("<ellipse") || line.startsWith("<circle")) {
		flush()
		mode = "circle"
		cx = cy = rx = ry = 0
	}
	else if (line.startsWith("<path")) {
		flush()
		mode = "path"
	}
	else if (line.startsWith("<g")) {
		flush()
		mode = "g"
	}
	else if (line.startsWith('x="'))
		x = (Math.round(line.split('"')[1]))
	else if (line.startsWith('y="'))
		y = (Math.round(line.split('"')[1]))
	else if (line.startsWith('width="'))
		w = (Math.round(line.split('"')[1]))
	else if (line.startsWith('height="'))
		h = (Math.round(line.split('"')[1]))
	else if (line.startsWith('cx="'))
		cx = (Math.round(line.split('"')[1]))
	else if (line.startsWith('cy="'))
		cy = (Math.round(line.split('"')[1]))
	else if (line.startsWith('r="'))
		rx = ry = (Math.round(line.split('"')[1]))
	else if (line.startsWith('rx="'))
		rx = (Math.round(line.split('"')[1]))
	else if (line.startsWith('ry="'))
		ry = (Math.round(line.split('"')[1]))
	else if (line.startsWith('inkscape:label="') && mode === "g")
		name = line.split('"')[1]
	else if (line.startsWith('inkscape:label="') && mode !== "g")
		subname = line.split('"')[1]
	else if (line.startsWith('d="'))
		parse_path_data(line.split('"')[1].split(/[ ,]/))
	if (line.includes("</tspan>")) {
		let name = line.replace(/^[^>]*>/, "").replace(/<\/tspan.*/, "")
		labels.push({x, y, name})
	}
}

flush()

function find_closest_node(list, x, y) {
	let nd = Infinity, nn = null

	for (let n of list) {
		let d = Math.hypot(n.x - x, n.y - y)
		if (d < nd) {
			nd = d
			nn = n
		}
	}

	if (!nn) {
		console.log("NOT FOUND", x, y)
		return [ null, 0 ]
	}

	return [ nn, nd ]
}

console.log("const layout = " + JSON.stringify({ circles, rects }, null, "\t"))