// app.get('/json/add/:tag',               fns.addTag);               // Adds a tag to the scan list
// app.get('/json/remove/:tag',            fns.removeTag);            // Removes a tag from the scan list
// app.get('/json/val/:tag',               fns.latestTagValue);       // Gets the latest value of a single tag
// app.get('/json/series/:tag/:hours',     fns.seriesTagValues);      // Gets all the values of a tag for the last X hours
// app.get('/json/tags',                   fns.allTags);              // Lists all tags in the scan list
// app.get('/json/all',                    fns.allValues);            // Gets the latest values of all tags in the scan list


var getScanList = function(sl){
	var query = "SELECT * FROM TagData.tags WHERE deleted = 0;";

};

exports.addTag = function(req, res){
	var vals = {
		tagName: req.params.tagName,
		units: req.params.units,
	};
	var query = "INSERT INTO TagData.tags SET ?";
	req.app.locals.db.query(query, vals, function(err, rows, fields) {
		  if (err) {
		  	res.json({status:"error", message:err});
		  	console.log(err);
		} else {
			res.json({status:"OK"});
		}
	});
};

exports.removeTag = function(req, res){
	var query = "UPDATE TagData.tags SET deleted = 1 WHERE id = " + parseInt(req.params.tag) + ";";
	req.app.locals.db.query(query, function(err, rows, fields) {
		  if (err) {
		  	res.json({status:"error", message:err});
		  	console.log(err);
		} else {
			res.json({status:"OK"});
		}
	});
};

exports.latestTagValue = function(req, res){
	var query = "SELECT * FROM TagData.values WHERE id = (SELECT MAX(id) FROM TagData.values WHERE tagID = (SELECT id FROM TagData.tags WHERE tagName = '" + req.params.tag + "'));";
	req.app.locals.db.query(query, function(err, rows, fields) {
		  if (err) {
		  	res.json({status:"error", message:err});
		  	console.log(err);
		} else {
			res.json({status:"OK", tag_val:rows[0]});
		}
	});
};

exports.seriesTagValues = function(req, res){
	var query = "SELECT * FROM TagData.values WHERE tagID = "+ req.params.tag +" AND dateAdded > DATE_SUB(NOW(),INTERVAL "+ req.params.hours +" HOUR)";
	req.app.locals.db.query(query, function(err, rows, fields) {
		if (err){
			console.log(err);
			res.json({status:"error", message:err, query:query});
		} else {
			res.json({status:"OK", tag: req.params.tag, values:rows});
		}
	});
};

exports.allTags = function(req, res){
	var query = "SELECT * FROM TagData.tags WHERE deleted = 0;";
	req.app.locals.db.query(query, function(err, rows, fields) {
		  if (err) {
		  	res.json({status:"error", message:err});
		  	console.log(err);
		} else {
			res.json({status:"OK", tags:rows});
		}
	});
};

exports.allValues = function(req, res){
	res.json({status:"error", message:"not implemented"});
};