/**

* Module dependencies.

*/

var express = require('express')

, Canvas = require('../lib/canvas')

, Image = Canvas.Image

, bodyParser = require('body-parser')

, app = express();

// Config

app.set('views', __dirname + '/views');

app.set('view engine', 'jade');

// Middleware

app.use(bodyParser.json());

app.use(express.static(__dirname + '/public'));

// Routes

app.get('/', function(req, res){

res.render('tests');

});

function testFn(req){

// Normalize state.png as ./public/state.png

// no good way around this at the moment

req.body.fn = req.body.fn

.replace("'state.png'", "'" + __dirname + "/public/state.png'")

.replace("'face.jpeg'", "'" + __dirname + "/public/face.jpeg'")

.replace("'star.png'", "'" + __dirname + "/public/star.png'");

// Do not try this at home :)

return eval('(' + req.body.fn + ')');

}

function createCanvas(req, type){

var width = req.body.width

, height = req.body.height;

return new Canvas(width, height, type);

}

app.post('/render', function(req, res, next){

var fn = testFn(req)

, canvas = createCanvas(req)

, ctx = canvas.getContext('2d')

, start = new Date;

function done(){

var duration = new Date - start;

canvas.toDataURL(function(err, str){

res.send({ data: str, duration: duration });

});

}

2 == fn.length

? fn(ctx, done)

: fn(ctx), done();

});

app.post('/pdf', function(req, res, next){

req.body = JSON.parse(req.body.json);

var fn = testFn(req)

, canvas = createCanvas(req, 'pdf')

, ctx = canvas.getContext('2d');

function done(){

res.writeHead(200, {'Content-Type' : 'application/pdf'});

res.write(canvas.toBuffer());

res.end();

}

2 == fn.length

? fn(ctx, done)

: fn(ctx), done();

});

app.post('/jpeg', function(req, res, next){

var fn = testFn(req)

, canvas = createCanvas(req)

, ctx = canvas.getContext('2d');

function done(){

var stream = canvas.jpegStream();

var buffers = [];

stream.on('data', function (chunk) {

buffers.push(chunk);

});

stream.on('end', function() {

res.send({data: 'data:image/jpeg;base64,' + Buffer.concat(buffers).toString('base64')});

});

}

2 == fn.length

? fn(ctx, done)

: fn(ctx), done();

});

var port = parseInt(process.argv[2] || '4000', 10);

app.listen(port);

console.log('Test server listening on port %d', port);