var Express = require('express');
// v1 api
var convert = require('./lib/convert');
// v2 api
var convertv2 = require('./lib/convertv2');
var serveStatic = require('serve-static');
var request = require('request');
var cors = require('cors');
var errorPage = require('./lib/errorPage');
var morgan = require('morgan');

var app = Express();

var logger = morgan(':method :url :status via :referrer - :response-time ms') 

app.use(
	serveStatic('static',{
		maxAge:'1d'
	})
);

function doCache(res,durationSecs){
	res.set({
		"Cache-Control":"max-age="+durationSecs
	})
}


// this just redirects to the 
app.options('/api/feed',cors());
app.get('/api/feed',cors(),function(req,res){

	// get feed url
	var feedUrl = req.query.url;
	if (!feedUrl){
		res.status(400);
		res.send(errorPage(400,'You need to specify a feed URL'));
		return;
	}

	var userUrl = feedUrl.replace(/\.atom.*/i,'');

	var redirectUrl = '/apiv2/feed?';
	var qs = ['userurl='+encodeURIComponent(userUrl),"api=v1"];

	(['size','theme','boosts','replies']).forEach(key=>{
		if (typeof req.query[key] != 'undefined'){
			qs.push(key+'='+encodeURIComponent(req.query[key]));
		}
	})

	res.redirect(redirectUrl + qs.join('&'));

});

app.options('/apiv2/feed',cors());
// http://localhost:8000/apiv2/feed?userurl=https%3A%2F%2Foctodon.social%2Fusers%2Ffenwick67
app.get('/apiv2/feed',cors(),logger,function(req,res){
	
	// get feed url
	var userUrl = req.query.userurl;
	if (!userUrl){
		res.status(400);
		res.send(errorPage(400,'You need to specify a user URL'));
		return;
	}

	var feedUrl = req.query.feedurl;

	var opts = {};
	if (req.query.size){
		opts.size = req.query.size;
	}
	if (req.query.theme){
		opts.theme = req.query.theme;
	}
	if (req.query.header){
		if (req.query.header.toLowerCase() == 'no' || req.query.header.toLowerCase() == 'false'){
			opts.header = false;
		}else{
			opts.header = true;
		}
	}

	opts.boosts = true;
	if (req.query.boosts){
		if (req.query.boosts.toLowerCase() == 'no' || req.query.boosts.toLowerCase() == 'false'){
			opts.boosts = false;
		}else{
			opts.boosts = true;
		}
	}

	opts.replies = true;
	if (req.query.replies){
		if (req.query.replies.toLowerCase() == 'no' || req.query.replies.toLowerCase() == 'false'){
			opts.replies = false;
		}else{
			opts.replies = true;
		}
	}
	opts.userUrl = userUrl;
	opts.feedUrl = feedUrl;
	opts.mastofeedUrl = req.url;

	convertv2(opts).then((data)=>{
		res.status(200);
		doCache(res,60*60);
		res.send(data);
	}).catch((er)=>{
		res.status(500);
		res.send(errorPage(500,null,{theme:opts.theme,size:opts.size}));
		// TODO log the error
		console.error(er,er.stack);
	})
})

app.listen(process.env.PORT || 8000,function(){
	console.log('Server started, listening on '+(process.env.PORT || 8000));
});