"use strict";

// let realConsoleLog = console.log.bind(console);
// console.log = function(...args) {
// 	realConsoleLog(`[console.log called from ${(new Error).stack.split("\n")[2].replace(/^\s* at /, "")}]`);
// 	realConsoleLog(...args);
// };

// let realConsoleError = console.error.bind(console);
// console.error = function(...args) {
// 	realConsoleError(`[console.error called from ${(new Error).stack.split("\n")[2].replace(/^\s* at /, "")}]`);
// 	realConsoleError(...args);
// };

const Promise = require("bluebird");
const express = require("express");
const expressPromiseRouter = require("express-promise-router");

const pipe = require("@promistream/pipe");
const fromNodeStream = require("@promistream/from-node-stream");
const map = require("@promistream/map");

const initialize = require("./initialize");
const errors = require("./errors");

return Promise.try(() => {
	return initialize({
		knexfile: require("../knexfile")
	});
}).then((state) => {
	let { db, knex } = state;

	const queries = require("./queries")(state);

	let app = express();
	let router = expressPromiseRouter();
	
	router.get("/items/:id", (req, res) => {
		return Promise.try(() => {
			return db.Item.query(knex).findById(req.params.id);
		}).then((item) => {
			if (item != null) {
				res.json(item);
			} else {
				throw new errors.NotFound(`No such item exists`);
			}
		});
	});
	
	router.delete("/items/:id", (req, res) => {
		return Promise.try(() => {
			return db.Item.query(knex)
				.findById(req.params.id)
				.delete();
		}).then((affectedRows) => {
			if (affectedRows > 0) {
				res.status(204).end();
			} else {
				throw new errors.NotFound(`No such item exists`);
			}
		});
	});

	// MARKER: Stub out routes, replace error implementation, add response generation for HTTP errors
	
	router.get("/items/:id/metadata", (req, res) => {
		
	});
	
	router.get("/items/:id/operations", (req, res) => {
		
	});
	
	router.get("/items/:id/operations/:operation/expire", (req, res) => {
		
	});
	
	router.post("/items/add", (req, res) => {
		
	});
	
	router.put("/items/add/:id", (req, res) => {
		
	});
	
	router.get("/items/:id", (req, res) => {
		
	});

	router.get("/updates", (req, res) => {
		let timestamp = (req.query.timestamp != null)
			? new Date(parseInt(req.query.since) * 1000)
			: undefined;

		// FIXME: Validation!
		return pipe([
			queries.getUpdates(knex, { prefix: req.query.prefix, timestamp: timestamp }),
			map((item) => JSON.stringify(item) + "\n"),
			fromNodeStream(res)
		]).read();
	});
	
	app.use(router);
	app.listen(3000, () => {
		console.log("Server listening on port 3000");
	});
});