#!/usr/bin/env python
# coding: utf-8
# Copyright (c) 2015 Nagarjuna Kumarappan
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# Author: Nagarjuna Kumarappan <nagarjuna.412@gmail.com>


# imports
from plumbum import local, FG
import tempfile
import os
import sys

# constants
FZF_URL = "https://github.com/junegunn/fzf"
CURRENT_DIR = os.path.dirname(os.path.realpath(__file__))

#VERSION = open(CURRENT_DIR+'/VERSION').read().strip('\n').split('.')

class FzfPrompt:
	
	def __init__(self):
		self.sh = local['sh']

		# check fzf
		try:
			self.fzf = local['fzf']
		except:
			raise SystemError("Cannot find 'fzf' installed on PATH. ( {0} )".format(FZF_URL))
	
	
	def prompt(self, choices=None, fzf_options=""):
		
		# convert lists to strings [ 1, 2, 3 ] => "1\n2\n3"
		choices_str = '\n'.join( map(str,choices) )

		selection = []

		with tempfile.NamedTemporaryFile() as input_file:
			with tempfile.NamedTemporaryFile() as output_file:

				# create an temp file with list entries as lines 
				input_file.write(choices_str)
				input_file.flush()
				
				self.sh['-c',CURRENT_DIR+"/filefzf.sh {0} {1} {2}".format( input_file.name, output_file.name, fzf_options )] & FG
			
				# get selected options
				with open(output_file.name) as f:
					for line in f:
						selection.append(line.strip('\n'))
		
		return selection
