"""
General serializer field tests.
"""
from __future__ import unicode_literals
import datetime

from django.db import models
from django.test import TestCase
from django.core import validators

from rest_framework import serializers


class TimestampedModel(models.Model):
    added = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)


class CharPrimaryKeyModel(models.Model):
    id = models.CharField(max_length=20, primary_key=True)


class TimestampedModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = TimestampedModel


class CharPrimaryKeyModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = CharPrimaryKeyModel


class TimeFieldModel(models.Model):
    clock = models.TimeField()


class TimeFieldModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = TimeFieldModel


class BasicFieldTests(TestCase):
    def test_auto_now_fields_read_only(self):
        """
        auto_now and auto_now_add fields should be read_only by default.
        """
        serializer = TimestampedModelSerializer()
        self.assertEqual(serializer.fields['added'].read_only, True)

    def test_auto_pk_fields_read_only(self):
        """
        AutoField fields should be read_only by default.
        """
        serializer = TimestampedModelSerializer()
        self.assertEqual(serializer.fields['id'].read_only, True)

    def test_non_auto_pk_fields_not_read_only(self):
        """
        PK fields other than AutoField fields should not be read_only by default.
        """
        serializer = CharPrimaryKeyModelSerializer()
        self.assertEquals(serializer.fields['id'].read_only, False)


class DateFieldTest(TestCase):
    """
    Tests for the DateFieldTest from_native() and to_native() behavior
    """

    def test_from_native_string(self):
        """
        Make sure from_native() accepts default iso input formats.
        """
        f = serializers.DateField()
        result_1 = f.from_native('1984-07-31')

        self.assertEqual(datetime.date(1984, 7, 31), result_1)

    def test_from_native_datetime_date(self):
        """
        Make sure from_native() accepts a datetime.date instance.
        """
        f = serializers.DateField()
        result_1 = f.from_native(datetime.date(1984, 7, 31))

        self.assertEqual(result_1, datetime.date(1984, 7, 31))

    def test_from_native_custom_format(self):
        """
        Make sure from_native() accepts custom input formats.
        """
        f = serializers.DateField(input_formats=['%Y -- %d'])
        result = f.from_native('1984 -- 31')

        self.assertEqual(datetime.date(1984, 1, 31), result)

    def test_from_native_invalid_default_on_custom_format(self):
        """
        Make sure from_native() don't accept default formats if custom format is preset
        """
        f = serializers.DateField(input_formats=['%Y -- %d'])

        try:
            f.from_native('1984-07-31')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY -- DD"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_empty(self):
        """
        Make sure from_native() returns None on empty param.
        """
        f = serializers.DateField()
        result = f.from_native('')

        self.assertEqual(result, None)

    def test_from_native_none(self):
        """
        Make sure from_native() returns None on None param.
        """
        f = serializers.DateField()
        result = f.from_native(None)

        self.assertEqual(result, None)

    def test_from_native_invalid_date(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid date.
        """
        f = serializers.DateField()

        try:
            f.from_native('1984-13-31')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY-MM-DD"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_invalid_format(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid format.
        """
        f = serializers.DateField()

        try:
            f.from_native('1984 -- 31')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY-MM-DD"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_to_native(self):
        """
        Make sure to_native() returns isoformat as default.
        """
        f = serializers.DateField()

        result_1 = f.to_native(datetime.date(1984, 7, 31))

        self.assertEqual('1984-07-31', result_1)

    def test_to_native_custom_format(self):
        """
        Make sure to_native() returns correct custom format.
        """
        f = serializers.DateField(output_format="%Y - %m.%d")

        result_1 = f.to_native(datetime.date(1984, 7, 31))

        self.assertEqual('1984 - 07.31', result_1)


class DateTimeFieldTest(TestCase):
    """
    Tests for the DateTimeField from_native() and to_native() behavior
    """

    def test_from_native_string(self):
        """
        Make sure from_native() accepts default iso input formats.
        """
        f = serializers.DateTimeField()
        result_1 = f.from_native('1984-07-31 04:31')
        result_2 = f.from_native('1984-07-31 04:31:59')
        result_3 = f.from_native('1984-07-31 04:31:59.000200')

        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31), result_1)
        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59), result_2)
        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59, 200), result_3)

    def test_from_native_datetime_datetime(self):
        """
        Make sure from_native() accepts a datetime.datetime instance.
        """
        f = serializers.DateTimeField()
        result_1 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31))
        result_2 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
        result_3 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))

        self.assertEqual(result_1, datetime.datetime(1984, 7, 31, 4, 31))
        self.assertEqual(result_2, datetime.datetime(1984, 7, 31, 4, 31, 59))
        self.assertEqual(result_3, datetime.datetime(1984, 7, 31, 4, 31, 59, 200))

    def test_from_native_custom_format(self):
        """
        Make sure from_native() accepts custom input formats.
        """
        f = serializers.DateTimeField(input_formats=['%Y -- %H:%M'])
        result = f.from_native('1984 -- 04:59')

        self.assertEqual(datetime.datetime(1984, 1, 1, 4, 59), result)

    def test_from_native_invalid_default_on_custom_format(self):
        """
        Make sure from_native() don't accept default formats if custom format is preset
        """
        f = serializers.DateTimeField(input_formats=['%Y -- %H:%M'])

        try:
            f.from_native('1984-07-31 04:31:59')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: YYYY -- HH:MM"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_empty(self):
        """
        Make sure from_native() returns None on empty param.
        """
        f = serializers.DateTimeField()
        result = f.from_native('')

        self.assertEqual(result, None)

    def test_from_native_none(self):
        """
        Make sure from_native() returns None on None param.
        """
        f = serializers.DateTimeField()
        result = f.from_native(None)

        self.assertEqual(result, None)

    def test_from_native_invalid_datetime(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid datetime.
        """
        f = serializers.DateTimeField()

        try:
            f.from_native('04:61:59')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: "
                                          "YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ]"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_invalid_format(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid format.
        """
        f = serializers.DateTimeField()

        try:
            f.from_native('04 -- 31')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: "
                                          "YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ]"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_to_native(self):
        """
        Make sure to_native() returns isoformat as default.
        """
        f = serializers.DateTimeField()

        result_1 = f.to_native(datetime.datetime(1984, 7, 31))
        result_2 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31))
        result_3 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
        result_4 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))

        self.assertEqual('1984-07-31T00:00:00', result_1)
        self.assertEqual('1984-07-31T04:31:00', result_2)
        self.assertEqual('1984-07-31T04:31:59', result_3)
        self.assertEqual('1984-07-31T04:31:59.000200', result_4)

    def test_to_native_custom_format(self):
        """
        Make sure to_native() returns correct custom format.
        """
        f = serializers.DateTimeField(output_format="%Y - %H:%M")

        result_1 = f.to_native(datetime.datetime(1984, 7, 31))
        result_2 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31))
        result_3 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
        result_4 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))

        self.assertEqual('1984 - 00:00', result_1)
        self.assertEqual('1984 - 04:31', result_2)
        self.assertEqual('1984 - 04:31', result_3)
        self.assertEqual('1984 - 04:31', result_4)


class TimeFieldTest(TestCase):
    """
    Tests for the TimeField from_native() and to_native() behavior
    """

    def test_from_native_string(self):
        """
        Make sure from_native() accepts default iso input formats.
        """
        f = serializers.TimeField()
        result_1 = f.from_native('04:31')
        result_2 = f.from_native('04:31:59')
        result_3 = f.from_native('04:31:59.000200')

        self.assertEqual(datetime.time(4, 31), result_1)
        self.assertEqual(datetime.time(4, 31, 59), result_2)
        self.assertEqual(datetime.time(4, 31, 59, 200), result_3)

    def test_from_native_datetime_time(self):
        """
        Make sure from_native() accepts a datetime.time instance.
        """
        f = serializers.TimeField()
        result_1 = f.from_native(datetime.time(4, 31))
        result_2 = f.from_native(datetime.time(4, 31, 59))
        result_3 = f.from_native(datetime.time(4, 31, 59, 200))

        self.assertEqual(result_1, datetime.time(4, 31))
        self.assertEqual(result_2, datetime.time(4, 31, 59))
        self.assertEqual(result_3, datetime.time(4, 31, 59, 200))

    def test_from_native_custom_format(self):
        """
        Make sure from_native() accepts custom input formats.
        """
        f = serializers.TimeField(input_formats=['%H -- %M'])
        result = f.from_native('04 -- 31')

        self.assertEqual(datetime.time(4, 31), result)

    def test_from_native_invalid_default_on_custom_format(self):
        """
        Make sure from_native() don't accept default formats if custom format is preset
        """
        f = serializers.TimeField(input_formats=['%H -- %M'])

        try:
            f.from_native('04:31:59')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: HH -- MM"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_empty(self):
        """
        Make sure from_native() returns None on empty param.
        """
        f = serializers.TimeField()
        result = f.from_native('')

        self.assertEqual(result, None)

    def test_from_native_none(self):
        """
        Make sure from_native() returns None on None param.
        """
        f = serializers.TimeField()
        result = f.from_native(None)

        self.assertEqual(result, None)

    def test_from_native_invalid_time(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid time.
        """
        f = serializers.TimeField()

        try:
            f.from_native('04:61:59')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: "
                                          "HH:MM[:ss[.uuuuuu]]"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_from_native_invalid_format(self):
        """
        Make sure from_native() raises a ValidationError on passing an invalid format.
        """
        f = serializers.TimeField()

        try:
            f.from_native('04 -- 31')
        except validators.ValidationError as e:
            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: "
                                          "HH:MM[:ss[.uuuuuu]]"])
        else:
            self.fail("ValidationError was not properly raised")

    def test_to_native(self):
        """
        Make sure to_native() returns isoformat as default.
        """
        f = serializers.TimeField()
        result_1 = f.to_native(datetime.time(4, 31))
        result_2 = f.to_native(datetime.time(4, 31, 59))
        result_3 = f.to_native(datetime.time(4, 31, 59, 200))

        self.assertEqual('04:31:00', result_1)
        self.assertEqual('04:31:59', result_2)
        self.assertEqual('04:31:59.000200', result_3)

    def test_to_native_custom_format(self):
        """
        Make sure to_native() returns correct custom format.
        """
        f = serializers.TimeField(output_format="%H - %S [%f]")
        result_1 = f.to_native(datetime.time(4, 31))
        result_2 = f.to_native(datetime.time(4, 31, 59))
        result_3 = f.to_native(datetime.time(4, 31, 59, 200))

        self.assertEqual('04 - 00 [000000]', result_1)
        self.assertEqual('04 - 59 [000000]', result_2)
        self.assertEqual('04 - 59 [000200]', result_3)