#!/usr/bin/env node

var width = 960,
    height = 500,
    projectionName = process.argv[2],
    projectionSymbol = "geo" + projectionName[0].toUpperCase() + projectionName.slice(1);

if (!/^[a-z0-9]+$/i.test(projectionName)) throw new Error;

var fs = require("fs"),
    topojson = require("topojson-client"),
    Canvas = require("canvas"),
    d3_geo = require("../");

var canvas = new Canvas(width, height),
    context = canvas.getContext("2d");

var us = require("./data/us-10m.json");

var path = d3_geo.geoPath()
    .projection(d3_geo[projectionSymbol]().precision(0.1))
    .context(context);

context.fillStyle = "#fff";
context.fillRect(0, 0, width, height);

context.beginPath();
path(topojson.feature(us, us.objects.land));
context.fillStyle = "#000";
context.fill();

context.beginPath();
path(topojson.mesh(us, us.objects.counties, function(a, b) { return a !== b && !(a.id / 1000 ^ b.id / 1000); }));
context.lineWidth = 0.5;
context.strokeStyle = "#fff";
context.stroke();

context.beginPath();
path(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; }));
context.lineWidth = 1;
context.strokeStyle = "#fff";
context.stroke();

canvas.pngStream().pipe(process.stdout);