# -*- coding: utf-8
"""Tests for prompt generation."""

import tempfile
import unittest

import os
import nose.tools as nt

from IPython.testing import tools as tt, decorators as dec
from IPython.core.prompts import PromptManager
from IPython.testing.globalipapp import get_ipython

ip = get_ipython()


class PromptTests(unittest.TestCase):
    def setUp(self):
        self.pm = PromptManager(shell=ip, config=ip.config)
    
    def test_multiline_prompt(self):
        self.pm.in_template = "[In]\n>>>"
        self.pm.render('in')
        self.assertEqual(self.pm.width, 3)
        self.assertEqual(self.pm.txtwidth, 3)
        
        self.pm.in_template = '[In]\n'
        self.pm.render('in')
        self.assertEqual(self.pm.width, 0)
        self.assertEqual(self.pm.txtwidth, 0)
    
    def test_translate_abbreviations(self):
        def do_translate(template):
            self.pm.in_template = template
            return self.pm.templates['in']
        
        pairs = [(r'%n>', '{color.number}{count}{color.prompt}>'),
                 (r'\T', '{time}'),
                 (r'\n', '\n')
                ]
    
        tt.check_pairs(do_translate, pairs)
    
    def test_user_ns(self):
        self.pm.color_scheme = 'NoColor'
        ip.ex("foo='bar'")
        self.pm.in_template = "In [{foo}]"
        prompt = self.pm.render('in')
        self.assertEquals(prompt, u'In [bar]')

    def test_builtins(self):
        self.pm.color_scheme = 'NoColor'
        self.pm.in_template = "In [{int}]"
        prompt = self.pm.render('in')
        self.assertEquals(prompt, u"In [%r]" % int)

    def test_undefined(self):
        self.pm.color_scheme = 'NoColor'
        self.pm.in_template = "In [{foo_dne}]"
        prompt = self.pm.render('in')
        self.assertEquals(prompt, u"In [<ERROR: 'foo_dne' not found>]")

    def test_render(self):
        self.pm.in_template = r'\#>'
        self.assertEqual(self.pm.render('in',color=False), '%d>' % ip.execution_count)
    
    def test_render_unicode(self):
        td = tempfile.mkdtemp(u'ünicødé')
        save = os.getcwdu()
        os.chdir(td)
        self.pm.in_template = r'\w [\#]'
        try:
            p = self.pm.render('in', color=False)
            self.assertEquals(p, u"%s [%i]" % (os.getcwdu(), ip.execution_count))
        finally:
            os.chdir(save)
            os.rmdir(td)