#!/usr/bin/env coffee

exec = require('child_process').exec
readline = require 'readline'

# Send something to nailgun and format the result.

send_to_repl = (str) ->
	child = exec "/home/lu/t/vim/clojure/client/ng vimclojure.Nail Repl -r",
		(err, stdout, stderr) ->
			if(err)
				console.log err
				exit 1

			answer = JSON.parse stdout
			process.stdout.write answer.stdout
			if answer.stderr isnt ""
				process.stderr.write answer.stderr
			rl.prompt()

	child.stdin.write str
	child.stdin.end()

get_completion_for = (str, cb) ->
	relevant_match = str.match(/[a-zA-Z][a-zA-Z0-9\-\?]+$/)
	if relevant_match
		relevant = relevant_match[0]
	else
		cb null, [[], str]
		return

	exec "/home/lu/t/vim/clojure/client/ng vimclojure.Nail Complete --base #{relevant}",
		(err, stdout, stderr) ->
			if(err)
				console.log err
				exit 1

			answer = JSON.parse stdout
			matches = (m.word for m in answer.value)
			cb null, [matches, str]

is_balanced = (str) ->
	n = 0
	for c in str
		n += 1 if c in "([\""
		n -= 1 if c in ")]\""
	n == 0

console.log "o'rly 0.x (clojure repl with a nailgun)"
rl = readline.createInterface process.stdin, process.stdout, get_completion_for
rl.setPrompt "> "
rl.prompt()
cmplt = ""
rl.on 'line', (cmd) ->
	cmd = cmplt + cmd
	if is_balanced cmd
		send_to_repl cmd
	else
		cmplt = cmd
		rl.write("  ")