import warnings
import six
import sys
import qrcode
import qrcode.util
import qrcode.image.svg

try:
    import qrcode.image.pure
    import pymaging_png  # ensure that PNG support is installed
except ImportError:  # pragma: no cover
    pymaging_png = None

import qrcode
from qrcode.image.base import BaseImage
from qrcode.exceptions import DataOverflowError
from qrcode.util import (
    QRData, MODE_NUMBER, MODE_ALPHA_NUM, MODE_8BIT_BYTE)
from qrcode.tests.svg import SvgImageWhite

try:
    import unittest2 as unittest
except ImportError:
    import unittest

try:
    from unittest import mock
except ImportError:
    import mock

UNICODE_TEXT = u'\u03b1\u03b2\u03b3'


class QRCodeTests(unittest.TestCase):

    def test_basic(self):
        qr = qrcode.QRCode(version=1)
        qr.add_data('a')
        qr.make(fit=False)

    def test_large(self):
        qr = qrcode.QRCode(version=27)
        qr.add_data('a')
        qr.make(fit=False)

    def test_invalid_version(self):
        qr = qrcode.QRCode(version=41)
        self.assertRaises(ValueError, qr.make, fit=False)

    def test_overflow(self):
        qr = qrcode.QRCode(version=1)
        qr.add_data('abcdefghijklmno')
        self.assertRaises(DataOverflowError, qr.make, fit=False)

    def test_add_qrdata(self):
        qr = qrcode.QRCode(version=1)
        data = QRData('a')
        qr.add_data(data)
        qr.make(fit=False)

    def test_fit(self):
        qr = qrcode.QRCode()
        qr.add_data('a')
        qr.make()
        self.assertEqual(qr.version, 1)
        qr.add_data('bcdefghijklmno')
        qr.make()
        self.assertEqual(qr.version, 2)

    def test_mode_number(self):
        qr = qrcode.QRCode()
        qr.add_data('1234567890123456789012345678901234', optimize=0)
        qr.make()
        self.assertEqual(qr.version, 1)
        self.assertEqual(qr.data_list[0].mode, MODE_NUMBER)

    def test_mode_alpha(self):
        qr = qrcode.QRCode()
        qr.add_data('ABCDEFGHIJ1234567890', optimize=0)
        qr.make()
        self.assertEqual(qr.version, 1)
        self.assertEqual(qr.data_list[0].mode, MODE_ALPHA_NUM)

    def test_regression_mode_comma(self):
        qr = qrcode.QRCode()
        qr.add_data(',', optimize=0)
        qr.make()
        self.assertEqual(qr.data_list[0].mode, MODE_8BIT_BYTE)

    def test_mode_8bit(self):
        qr = qrcode.QRCode()
        qr.add_data(u'abcABC' + UNICODE_TEXT, optimize=0)
        qr.make()
        self.assertEqual(qr.version, 1)
        self.assertEqual(qr.data_list[0].mode, MODE_8BIT_BYTE)

    def test_mode_8bit_newline(self):
        qr = qrcode.QRCode()
        qr.add_data('ABCDEFGHIJ1234567890\n', optimize=0)
        qr.make()
        self.assertEqual(qr.data_list[0].mode, MODE_8BIT_BYTE)

    def test_render_pil(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image()
        img.save(six.BytesIO())

    def test_qrcode_bad_factory(self):
        self.assertRaises(
            TypeError, qrcode.QRCode, image_factory='not_BaseImage')
        self.assertRaises(
            AssertionError, qrcode.QRCode, image_factory=dict)

    def test_qrcode_factory(self):

        class MockFactory(BaseImage):
            drawrect = mock.Mock()

        qr = qrcode.QRCode(image_factory=MockFactory)
        qr.add_data(UNICODE_TEXT)
        qr.make_image()
        self.assertTrue(MockFactory.drawrect.called)

    def test_render_svg(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=qrcode.image.svg.SvgImage)
        img.save(six.BytesIO())

    def test_render_svg_path(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=qrcode.image.svg.SvgPathImage)
        img.save(six.BytesIO())

    def test_render_svg_fragment(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=qrcode.image.svg.SvgFragmentImage)
        img.save(six.BytesIO())

    def test_render_svg_with_background(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=SvgImageWhite)
        img.save(six.BytesIO())

    @unittest.skipIf(not pymaging_png, "Requires pymaging with PNG support")
    def test_render_pymaging_png(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=qrcode.image.pure.PymagingImage)
        with warnings.catch_warnings():
            if six.PY3:
                warnings.simplefilter('ignore', DeprecationWarning)
            img.save(six.BytesIO())

    @unittest.skipIf(not pymaging_png, "Requires pymaging")
    def test_render_pymaging_png_bad_kind(self):
        qr = qrcode.QRCode()
        qr.add_data(UNICODE_TEXT)
        img = qr.make_image(image_factory=qrcode.image.pure.PymagingImage)
        self.assertRaises(ValueError, img.save, six.BytesIO(), kind='FISH')

    def test_optimize(self):
        qr = qrcode.QRCode()
        text = 'A1abc12345def1HELLOa'
        qr.add_data(text, optimize=4)
        qr.make()
        self.assertEqual(
            [d.mode for d in qr.data_list],
            [
                MODE_8BIT_BYTE, MODE_NUMBER, MODE_8BIT_BYTE, MODE_ALPHA_NUM,
                MODE_8BIT_BYTE
            ]
        )
        self.assertEqual(qr.version, 2)

    def test_optimize_short(self):
        qr = qrcode.QRCode()
        text = 'A1abc1234567def1HELLOa'
        qr.add_data(text, optimize=7)
        qr.make()
        self.assertEqual(len(qr.data_list), 3)
        self.assertEqual(
            [d.mode for d in qr.data_list],
            [MODE_8BIT_BYTE, MODE_NUMBER, MODE_8BIT_BYTE]
        )
        self.assertEqual(qr.version, 2)

    def test_optimize_size(self):
        text = 'A1abc12345123451234512345def1HELLOHELLOHELLOHELLOa' * 5

        qr = qrcode.QRCode()
        qr.add_data(text)
        qr.make()
        self.assertEqual(qr.version, 10)

        qr = qrcode.QRCode()
        qr.add_data(text, optimize=0)
        qr.make()
        self.assertEqual(qr.version, 11)

    def test_qrdata_repr(self):
        data = b'hello'
        data_obj = qrcode.util.QRData(data)
        self.assertEqual(repr(data_obj), repr(data))

    def test_print_ascii_stdout(self):
        qr = qrcode.QRCode()
        stdout_encoding = sys.stdout.encoding
        with mock.patch('sys.stdout') as fake_stdout:
            # Python 2.6 needs sys.stdout.encoding to be a real string.
            sys.stdout.encoding = stdout_encoding
            fake_stdout.isatty.return_value = None
            self.assertRaises(OSError, qr.print_ascii, tty=True)
            self.assertTrue(fake_stdout.isatty.called)

    def test_print_ascii(self):
        qr = qrcode.QRCode(border=0)
        f = six.StringIO()
        qr.print_ascii(out=f)
        printed = f.getvalue()
        f.close()
        expected = u'\u2588\u2580\u2580\u2580\u2580\u2580\u2588'
        self.assertEqual(printed[:len(expected)], expected)

        f = six.StringIO()
        f.isatty = lambda: True
        qr.print_ascii(out=f, tty=True)
        printed = f.getvalue()
        f.close()
        expected = (
            u'\x1b[48;5;232m\x1b[38;5;255m' +
            u'\xa0\u2584\u2584\u2584\u2584\u2584\xa0')
        self.assertEqual(printed[:len(expected)], expected)

    def test_print_tty_stdout(self):
        qr = qrcode.QRCode()
        with mock.patch('sys.stdout') as fake_stdout:
            fake_stdout.isatty.return_value = None
            self.assertRaises(OSError, qr.print_tty)
            self.assertTrue(fake_stdout.isatty.called)

    def test_print_tty(self):
        qr = qrcode.QRCode()
        f = six.StringIO()
        f.isatty = lambda: True
        qr.print_tty(out=f)
        printed = f.getvalue()
        f.close()
        BOLD_WHITE_BG = '\x1b[1;47m'
        BLACK_BG = '\x1b[40m'
        WHITE_BLOCK = BOLD_WHITE_BG + '  ' + BLACK_BG
        EOL = '\x1b[0m\n'
        expected = (
            BOLD_WHITE_BG + '  '*23 + EOL +
            WHITE_BLOCK + '  '*7 + WHITE_BLOCK)
        self.assertEqual(printed[:len(expected)], expected)

    def test_get_matrix(self):
        qr = qrcode.QRCode(border=0)
        qr.add_data('1')
        self.assertEqual(qr.get_matrix(), qr.modules)

    def test_get_matrix_border(self):
        qr = qrcode.QRCode(border=1)
        qr.add_data('1')
        matrix = [row[1:-1] for row in qr.get_matrix()[1:-1]]
        self.assertEqual(matrix, qr.modules)

    def test_negative_size_at_construction(self):
        self.assertRaises(ValueError, qrcode.QRCode, box_size=-1)

    def test_negative_size_at_usage(self):
        qr = qrcode.QRCode()
        qr.box_size = -1
        self.assertRaises(ValueError, qr.make_image)


class ShortcutTest(unittest.TestCase):

    def runTest(self):
        qrcode.make('image')
