"""CLI argument parsing related tests."""
import argparse
import json

import pytest
from requests.exceptions import InvalidSchema

import httpie.cli.argparser
from .fixtures import (
    FILE_CONTENT, FILE_PATH, FILE_PATH_ARG, JSON_FILE_CONTENT,
    JSON_FILE_PATH_ARG,
)
from httpie.status import ExitStatus
from httpie.cli import constants
from httpie.cli.definition import parser
from httpie.cli.argtypes import KeyValueArg, KeyValueArgType
from httpie.cli.requestitems import RequestItems
from .utils import HTTP_OK, MockEnvironment, StdinBytesIO, http


class TestItemParsing:
    key_value_arg = KeyValueArgType(*constants.SEPARATOR_GROUP_ALL_ITEMS)

    def test_invalid_items(self):
        items = ['no-separator']
        for item in items:
            pytest.raises(argparse.ArgumentTypeError, self.key_value_arg, item)

    def test_escape_separator(self):
        items = RequestItems.from_args([
            # headers
            self.key_value_arg(r'foo\:bar:baz'),
            self.key_value_arg(r'jack\@jill:hill'),

            # data
            self.key_value_arg(r'baz\=bar=foo'),

            # files
            self.key_value_arg(fr'bar\@baz@{FILE_PATH_ARG}'),
        ])
        # `requests.structures.CaseInsensitiveDict` => `dict`
        headers = dict(items.headers._store.values())

        assert headers == {
            'foo:bar': 'baz',
            'jack@jill': 'hill',
        }
        assert items.data == {
            'baz=bar': 'foo'
        }
        assert 'bar@baz' in items.files

    @pytest.mark.parametrize(('string', 'key', 'sep', 'value'), [
        ('path=c:\\windows', 'path', '=', 'c:\\windows'),
        ('path=c:\\windows\\', 'path', '=', 'c:\\windows\\'),
        ('path\\==c:\\windows', 'path=', '=', 'c:\\windows'),
    ])
    def test_backslash_before_non_special_character_does_not_escape(
        self, string, key, sep, value
    ):
        expected = KeyValueArg(orig=string, key=key, sep=sep, value=value)
        actual = self.key_value_arg(string)
        assert actual == expected

    def test_escape_longsep(self):
        items = RequestItems.from_args([
            self.key_value_arg(r'bob\:==foo'),
        ])
        assert items.params == {
            'bob:': 'foo'
        }

    def test_valid_items(self):
        items = RequestItems.from_args([
            self.key_value_arg('string=value'),
            self.key_value_arg('Header:value'),
            self.key_value_arg('Unset-Header:'),
            self.key_value_arg('Empty-Header;'),
            self.key_value_arg('list:=["a", 1, {}, false]'),
            self.key_value_arg('obj:={"a": "b"}'),
            self.key_value_arg('ed='),
            self.key_value_arg('bool:=true'),
            self.key_value_arg('file@' + FILE_PATH_ARG),
            self.key_value_arg('query==value'),
            self.key_value_arg('string-embed=@' + FILE_PATH_ARG),
            self.key_value_arg('raw-json-embed:=@' + JSON_FILE_PATH_ARG),
        ])

        # Parsed headers
        # `requests.structures.CaseInsensitiveDict` => `dict`
        headers = dict(items.headers._store.values())
        assert headers == {
            'Header': 'value',
            'Unset-Header': None,
            'Empty-Header': ''
        }

        # Parsed data
        raw_json_embed = items.data.pop('raw-json-embed')
        assert raw_json_embed == json.loads(JSON_FILE_CONTENT)
        items.data['string-embed'] = items.data['string-embed'].strip()
        assert dict(items.data) == {
            "ed": "",
            "string": "value",
            "bool": True,
            "list": ["a", 1, {}, False],
            "obj": {
                "a": "b"
            },
            "string-embed": FILE_CONTENT,
        }

        # Parsed query string parameters
        assert items.params == {
            'query': 'value'
        }

        # Parsed file fields
        assert 'file' in items.files
        assert (items.files['file'][1].read().strip().
                decode('utf8') == FILE_CONTENT)

    def test_multiple_file_fields_with_same_field_name(self):
        items = RequestItems.from_args([
            self.key_value_arg('file_field@' + FILE_PATH_ARG),
            self.key_value_arg('file_field@' + FILE_PATH_ARG),
        ])
        assert len(items.files['file_field']) == 2

    def test_multiple_text_fields_with_same_field_name(self):
        items = RequestItems.from_args(
            request_item_args=[
                self.key_value_arg('text_field=a'),
                self.key_value_arg('text_field=b')
            ],
            as_form=True,
        )
        assert items.data['text_field'] == ['a', 'b']
        assert list(items.data.items()) == [
            ('text_field', 'a'),
            ('text_field', 'b'),
        ]


class TestQuerystring:
    def test_query_string_params_in_url(self, httpbin):
        r = http('--print=Hhb', 'GET', httpbin.url + '/get?a=1&b=2')
        path = '/get?a=1&b=2'
        url = httpbin.url + path
        assert HTTP_OK in r
        assert f'GET {path} HTTP/1.1' in r
        assert f'"url": "{url}"' in r

    def test_query_string_params_items(self, httpbin):
        r = http('--print=Hhb', 'GET', httpbin.url + '/get', 'a==1')
        path = '/get?a=1'
        url = httpbin.url + path
        assert HTTP_OK in r
        assert f'GET {path} HTTP/1.1' in r
        assert f'"url": "{url}"' in r

    def test_query_string_params_in_url_and_items_with_duplicates(self,
                                                                  httpbin):
        r = http('--print=Hhb', 'GET',
                 httpbin.url + '/get?a=1&a=1', 'a==1', 'a==1')
        path = '/get?a=1&a=1&a=1&a=1'
        url = httpbin.url + path
        assert HTTP_OK in r
        assert f'GET {path} HTTP/1.1' in r
        assert f'"url": "{url}"' in r


class TestLocalhostShorthand:
    def test_expand_localhost_shorthand(self):
        args = parser.parse_args(args=[':'], env=MockEnvironment())
        assert args.url == 'http://localhost'

    def test_expand_localhost_shorthand_with_slash(self):
        args = parser.parse_args(args=[':/'], env=MockEnvironment())
        assert args.url == 'http://localhost/'

    def test_expand_localhost_shorthand_with_port(self):
        args = parser.parse_args(args=[':3000'], env=MockEnvironment())
        assert args.url == 'http://localhost:3000'

    def test_expand_localhost_shorthand_with_path(self):
        args = parser.parse_args(args=[':/path'], env=MockEnvironment())
        assert args.url == 'http://localhost/path'

    def test_expand_localhost_shorthand_with_port_and_slash(self):
        args = parser.parse_args(args=[':3000/'], env=MockEnvironment())
        assert args.url == 'http://localhost:3000/'

    def test_expand_localhost_shorthand_with_port_and_path(self):
        args = parser.parse_args(args=[':3000/path'], env=MockEnvironment())
        assert args.url == 'http://localhost:3000/path'

    def test_dont_expand_shorthand_ipv6_as_shorthand(self):
        args = parser.parse_args(args=['::1'], env=MockEnvironment())
        assert args.url == 'http://::1'

    def test_dont_expand_longer_ipv6_as_shorthand(self):
        args = parser.parse_args(
            args=['::ffff:c000:0280'],
            env=MockEnvironment()
        )
        assert args.url == 'http://::ffff:c000:0280'

    def test_dont_expand_full_ipv6_as_shorthand(self):
        args = parser.parse_args(
            args=['0000:0000:0000:0000:0000:0000:0000:0001'],
            env=MockEnvironment()
        )
        assert args.url == 'http://0000:0000:0000:0000:0000:0000:0000:0001'


class TestArgumentParser:

    def setup_method(self, method):
        self.parser = httpie.cli.argparser.HTTPieArgumentParser()

    def test_guess_when_method_set_and_valid(self):
        self.parser.args = argparse.Namespace()
        self.parser.args.method = 'GET'
        self.parser.args.url = 'http://example.com/'
        self.parser.args.request_items = []
        self.parser.args.ignore_stdin = False
        self.parser.env = MockEnvironment()
        self.parser._guess_method()
        assert self.parser.args.method == 'GET'
        assert self.parser.args.url == 'http://example.com/'
        assert self.parser.args.request_items == []

    def test_guess_when_method_not_set(self):
        self.parser.args = argparse.Namespace()
        self.parser.args.method = None
        self.parser.args.url = 'http://example.com/'
        self.parser.args.request_items = []
        self.parser.args.ignore_stdin = False
        self.parser.env = MockEnvironment()
        self.parser._guess_method()
        assert self.parser.args.method == 'GET'
        assert self.parser.args.url == 'http://example.com/'
        assert self.parser.args.request_items == []

    def test_guess_when_method_set_but_invalid_and_data_field(self):
        self.parser.args = argparse.Namespace()
        self.parser.args.method = 'http://example.com/'
        self.parser.args.url = 'data=field'
        self.parser.args.request_items = []
        self.parser.args.ignore_stdin = False
        self.parser.env = MockEnvironment()
        self.parser._guess_method()
        assert self.parser.args.method == 'POST'
        assert self.parser.args.url == 'http://example.com/'
        assert self.parser.args.request_items == [
            KeyValueArg(key='data',
                        value='field',
                        sep='=',
                        orig='data=field')
        ]

    def test_guess_when_method_set_but_invalid_and_header_field(self):
        self.parser.args = argparse.Namespace()
        self.parser.args.method = 'http://example.com/'
        self.parser.args.url = 'test:header'
        self.parser.args.request_items = []
        self.parser.args.ignore_stdin = False
        self.parser.env = MockEnvironment()
        self.parser._guess_method()
        assert self.parser.args.method == 'GET'
        assert self.parser.args.url == 'http://example.com/'
        assert self.parser.args.request_items, [
            KeyValueArg(key='test',
                        value='header',
                        sep=':',
                        orig='test:header')
        ]

    def test_guess_when_method_set_but_invalid_and_item_exists(self):
        self.parser.args = argparse.Namespace()
        self.parser.args.method = 'http://example.com/'
        self.parser.args.url = 'new_item=a'
        self.parser.args.request_items = [
            KeyValueArg(
                key='old_item', value='b', sep='=', orig='old_item=b')
        ]
        self.parser.args.ignore_stdin = False
        self.parser.env = MockEnvironment()
        self.parser._guess_method()
        assert self.parser.args.request_items, [
            KeyValueArg(key='new_item', value='a', sep='=', orig='new_item=a'),
            KeyValueArg(
                key='old_item', value='b', sep='=', orig='old_item=b'),
        ]


class TestNoOptions:

    def test_valid_no_options(self, httpbin):
        r = http('--verbose', '--no-verbose', 'GET', httpbin.url + '/get')
        assert 'GET /get HTTP/1.1' not in r

    def test_invalid_no_options(self, httpbin):
        r = http('--no-war', 'GET', httpbin.url + '/get',
                 tolerate_error_exit_status=True)
        assert r.exit_status == ExitStatus.ERROR
        assert 'unrecognized arguments: --no-war' in r.stderr
        assert 'GET /get HTTP/1.1' not in r


class TestStdin:

    def test_ignore_stdin(self, httpbin):
        env = MockEnvironment(
            stdin=StdinBytesIO(FILE_PATH.read_bytes()),
            stdin_isatty=False,
        )
        r = http('--ignore-stdin', '--verbose', httpbin.url + '/get', env=env)
        assert HTTP_OK in r
        assert 'GET /get HTTP' in r, "Don't default to POST."
        assert FILE_CONTENT not in r, "Don't send stdin data."

    def test_ignore_stdin_cannot_prompt_password(self, httpbin):
        r = http('--ignore-stdin', '--auth=no-password', httpbin.url + '/get',
                 tolerate_error_exit_status=True)
        assert r.exit_status == ExitStatus.ERROR
        assert 'because --ignore-stdin' in r.stderr

    def test_stdin_closed(self, httpbin):
        r = http(httpbin + '/get', env=MockEnvironment(stdin=None))
        assert HTTP_OK in r


class TestSchemes:

    def test_invalid_custom_scheme(self):
        # InvalidSchema is expected because HTTPie
        # shouldn't touch a formally valid scheme.
        with pytest.raises(InvalidSchema):
            http('foo+bar-BAZ.123://bah')

    def test_invalid_scheme_via_via_default_scheme(self):
        # InvalidSchema is expected because HTTPie
        # shouldn't touch a formally valid scheme.
        with pytest.raises(InvalidSchema):
            http('bah', '--default=scheme=foo+bar-BAZ.123')

    def test_default_scheme_option(self, httpbin_secure):
        url = f'{httpbin_secure.host}:{httpbin_secure.port}'
        assert HTTP_OK in http(url, '--default-scheme=https')

    def test_scheme_when_invoked_as_https(self, httpbin_secure):
        url = f'{httpbin_secure.host}:{httpbin_secure.port}'
        assert HTTP_OK in http(url, program_name='https')