# Python Substrate Interface Library
#
# Copyright 2018-2020 Stichting Polkascan (Polkascan Foundation).
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os
import unittest

from scalecodec import ScaleBytes
from substrateinterface import SubstrateInterface, ContractMetadata, ContractInstance, Keypair, ContractEvent
from substrateinterface.exceptions import ContractMetadataParseException
from test import settings


class ContractMetadataTestCase(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        cls.substrate = SubstrateInterface(url=settings.KUSAMA_NODE_URL)

    def setUp(self) -> None:
        self.contract_metadata = ContractMetadata.create_from_file(
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'erc20-v0.json'),
            substrate=self.substrate
        )

    def test_metadata_parsed(self):
        self.assertNotEqual(self.contract_metadata.metadata_dict, {})

    def test_incorrect_metadata_file(self):
        with self.assertRaises(ContractMetadataParseException):
            ContractMetadata.create_from_file(
                metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'incorrect_metadata.json'),
                substrate=self.substrate
            )

    def test_extract_typestring_from_types(self):
        self.assertEqual('u128', self.contract_metadata.get_type_string_for_metadata_type(1))
        self.assertEqual('AccountId', self.contract_metadata.get_type_string_for_metadata_type(5))
        self.assertEqual('[u8; 32]', self.contract_metadata.get_type_string_for_metadata_type(6))
        self.assertEqual('Option<AccountId>', self.contract_metadata.get_type_string_for_metadata_type(15))

    def test_invalid_type_id(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.get_type_string_for_metadata_type(99)

        self.assertEqual('type_id 99 not found in metadata', str(cm.exception))

    def test_contract_types_added_type_registry(self):

        for type_id in range(1, 16):
            type_string = self.contract_metadata.get_type_string_for_metadata_type(type_id)
            if type_string != '()':
                self.assertIsNotNone(self.substrate.runtime_config.get_decoder_class(type_string))

    def test_return_type_for_message(self):
        self.assertEqual('u128', self.contract_metadata.get_return_type_string_for_message('total_supply'))
        self.assertEqual('u128', self.contract_metadata.get_return_type_string_for_message('balance_of'))
        self.assertEqual(
            'ink::0x6e689bb2d2a19d1821177a607480a4527195b76dffec908f94ad7af0ed80c21f::12',
            self.contract_metadata.get_return_type_string_for_message('approve')
        )

    def test_invalid_constructor_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_constructor_data("invalid")

        self.assertEqual('Constructor "invalid" not found', str(cm.exception))

    def test_constructor_missing_arg(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_constructor_data("new", args={'test': 2})

        self.assertEqual('Argument "initial_supply" is missing', str(cm.exception))

    def test_constructor_data(self):

        scale_data = self.contract_metadata.generate_constructor_data("new", args={'initial_supply': 1000})
        self.assertEqual('0xd183512be8030000000000000000000000000000', scale_data.to_hex())

    def test_invalid_message_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_message_data("invalid_msg_name")

        self.assertEqual('Message "invalid_msg_name" not found', str(cm.exception))

    def test_generate_message_data(self):

        scale_data = self.contract_metadata.generate_message_data("total_supply")
        self.assertEqual('0xdcb736b5', scale_data.to_hex())

    def test_generate_message_data_with_args(self):

        scale_data = self.contract_metadata.generate_message_data("transfer", args={
            'to': '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty',
            'value': 10000
        })
        self.assertEqual(
            '0xfae3a09d8eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a4810270000000000000000000000000000',
            scale_data.to_hex()
        )

    def test_generate_message_data_missing_arg(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_message_data("transfer", args={
                'value': 10000
            })
        self.assertEqual('Argument "to" is missing', str(cm.exception))

    def test_contract_event_decoding(self):
        contract_event_data = '0x0001d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d018eaf04151687' + \
                              '736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000a7dcf75015000000000000000000'

        contract_event_obj = ContractEvent(
            data=ScaleBytes(contract_event_data),
            runtime_config=self.substrate.runtime_config,
            contract_metadata=self.contract_metadata
        )

        contract_event_obj.decode()

        self.assertEqual(
            'HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F', contract_event_obj.args[0]['value']
        )
        self.assertEqual(
            'FoQJpPyadYccjavVdTWxpxU7rUEaYhfLCPwXgkfD6Zat9QP', contract_event_obj.args[1]['value']
        )
        self.assertEqual(6000000000000000, contract_event_obj.args[2]['value'])

    def test_unsupported_ink_env_type_handling(self):
        with self.assertRaises(NotImplementedError):

            ContractMetadata.create_from_file(
                metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'unsupported_type_metadata.json'),
                substrate=self.substrate
            )


class ContractMetadataV1TestCase(ContractMetadataTestCase):
    def setUp(self) -> None:
        self.contract_metadata = ContractMetadata.create_from_file(
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'erc20-v1.json'),
            substrate=self.substrate
        )

    def test_metadata_parsed(self):
        self.assertNotEqual(self.contract_metadata.metadata_dict, {})

    def test_incorrect_metadata_file(self):
        with self.assertRaises(ContractMetadataParseException):
            ContractMetadata.create_from_file(
                metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'incorrect_metadata.json'),
                substrate=self.substrate
            )

    def test_extract_typestring_from_types(self):
        self.assertEqual(
            'ink::0x418399d957539253bbabc230dffce9e131d9d2e7918edd67e9d7d3f6924e3d9e::1',
            self.contract_metadata.get_type_string_for_metadata_type(1)
        )
        self.assertEqual(
            'ink::0x418399d957539253bbabc230dffce9e131d9d2e7918edd67e9d7d3f6924e3d9e::5',
            self.contract_metadata.get_type_string_for_metadata_type(5)
        )

    def test_invalid_type_id(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.get_type_string_for_metadata_type(99)

        self.assertEqual('type_id 99 not found in metadata', str(cm.exception))

    def test_contract_types_added_type_registry(self):

        for type_id in range(0, len(self.contract_metadata.metadata_dict['types'])):
            type_string = self.contract_metadata.get_type_string_for_metadata_type(type_id)
            if type_string != '()':
                self.assertIsNotNone(self.substrate.runtime_config.get_decoder_class(type_string))

    def test_return_type_for_message(self):
        self.assertEqual(
            'ink::0x418399d957539253bbabc230dffce9e131d9d2e7918edd67e9d7d3f6924e3d9e::0',
            self.contract_metadata.get_return_type_string_for_message('total_supply')
        )
        self.assertEqual(
            'ink::0x418399d957539253bbabc230dffce9e131d9d2e7918edd67e9d7d3f6924e3d9e::0',
            self.contract_metadata.get_return_type_string_for_message('balance_of')
        )
        self.assertEqual(
            'ink::0x418399d957539253bbabc230dffce9e131d9d2e7918edd67e9d7d3f6924e3d9e::11',
            self.contract_metadata.get_return_type_string_for_message('approve')
        )

    def test_invalid_constructor_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_constructor_data("invalid")

        self.assertEqual('Constructor "invalid" not found', str(cm.exception))

    def test_constructor_missing_arg(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_constructor_data("new", args={'test': 2})

        self.assertEqual('Argument "initial_supply" is missing', str(cm.exception))

    def test_constructor_data(self):

        scale_data = self.contract_metadata.generate_constructor_data("new", args={'initial_supply': 1000})
        self.assertEqual('0x9bae9d5ee8030000000000000000000000000000', scale_data.to_hex())

    def test_invalid_message_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_message_data("invalid_msg_name")

        self.assertEqual('Message "invalid_msg_name" not found', str(cm.exception))

    def test_generate_message_data(self):

        scale_data = self.contract_metadata.generate_message_data("total_supply")
        self.assertEqual('0xdb6375a8', scale_data.to_hex())

    def test_generate_message_data_with_args(self):

        scale_data = self.contract_metadata.generate_message_data("transfer", args={
            'to': '5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty',
            'value': 10000
        })
        self.assertEqual(
            '0x84a15da18eaf04151687736326c9fea17e25fc5287613693c912909cb226aa4794f26a4810270000000000000000000000000000',
            scale_data.to_hex()
        )

    def test_generate_message_data_missing_arg(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_message_data("transfer", args={
                'value': 10000
            })
        self.assertEqual('Argument "to" is missing', str(cm.exception))

    def test_contract_event_decoding(self):
        contract_event_data = '0x0001d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d018eaf04151687' + \
                              '736326c9fea17e25fc5287613693c912909cb226aa4794f26a480000a7dcf75015000000000000000000'

        contract_event_obj = ContractEvent(
            data=ScaleBytes(contract_event_data),
            runtime_config=self.substrate.runtime_config,
            contract_metadata=self.contract_metadata
        )

        contract_event_obj.decode()

        self.assertEqual(
            'HNZata7iMYWmk5RvZRTiAsSDhV8366zq2YGb3tLH5Upf74F', contract_event_obj.args[0]['value']
        )
        self.assertEqual(
            'FoQJpPyadYccjavVdTWxpxU7rUEaYhfLCPwXgkfD6Zat9QP', contract_event_obj.args[1]['value']
        )
        self.assertEqual(6000000000000000, contract_event_obj.args[2]['value'])

    def test_unsupported_ink_env_type_handling(self):
        with self.assertRaises(NotImplementedError):

            ContractMetadata.create_from_file(
                metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'unsupported_type_metadata.json'),
                substrate=self.substrate
            )


class ContractMetadataV3TestCase(ContractMetadataV1TestCase):
    def setUp(self) -> None:
        self.contract_metadata = ContractMetadata.create_from_file(
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'erc20-v3.json'),
            substrate=self.substrate
        )


class FlipperMetadataV3TestCase(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        cls.substrate = SubstrateInterface(url=settings.KUSAMA_NODE_URL)

    def setUp(self) -> None:
        self.contract_metadata = ContractMetadata.create_from_file(
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'flipper-v3.json'),
            substrate=self.substrate
        )

    def test_metadata_parsed(self):
        self.assertNotEqual(self.contract_metadata.metadata_dict, {})

    def test_incorrect_metadata_file(self):
        with self.assertRaises(ContractMetadataParseException):
            ContractMetadata.create_from_file(
                metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'incorrect_metadata.json'),
                substrate=self.substrate
            )

    def test_extract_typestring_from_types(self):
        self.assertEqual(
            'ink::0xf051c631190ac47f82e280ba763df932210f6e2447978e24cbe0dcc6d6903c7a::0',
            self.contract_metadata.get_type_string_for_metadata_type(0)
        )

    def test_contract_types_added_type_registry(self):
        type_string = self.contract_metadata.get_type_string_for_metadata_type(0)
        if type_string != '()':
            self.assertIsNotNone(self.substrate.runtime_config.get_decoder_class(type_string))

    def test_return_type_for_message(self):
        self.assertEqual(
            'ink::0xf051c631190ac47f82e280ba763df932210f6e2447978e24cbe0dcc6d6903c7a::0',
            self.contract_metadata.get_return_type_string_for_message('get')
        )
        self.assertEqual('Null', self.contract_metadata.get_return_type_string_for_message('flip'))

    def test_constructor_data(self):

        scale_data = self.contract_metadata.generate_constructor_data("new", args={'init_value': True})
        self.assertEqual('0x9bae9d5e01', scale_data.to_hex())

    def test_generate_message_data(self):

        scale_data = self.contract_metadata.generate_message_data("get")
        self.assertEqual('0x2f865bd9', scale_data.to_hex())

    def test_invalid_constructor_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_constructor_data("invalid")

        self.assertEqual('Constructor "invalid" not found', str(cm.exception))

    def test_invalid_message_name(self):
        with self.assertRaises(ValueError) as cm:
            self.contract_metadata.generate_message_data("invalid_msg_name")

        self.assertEqual('Message "invalid_msg_name" not found', str(cm.exception))


class FlipperInstanceTestCase(unittest.TestCase):

    @classmethod
    def setUpClass(cls):

        class MockedSubstrateInterface(SubstrateInterface):

            def rpc_request(self, method, params, result_handler=None):
                if method == 'state_call':
                    return {
                        'jsonrpc': '2.0',
                        'result': '0x7ee58accd6100100070000c0ce020200100001000000000000000000000000000000000000000000000400',
                        'id': 10
                    }
                if method == 'contracts_call':
                    return {
                        'jsonrpc': '2.0',
                        'result': {
                            'gasConsumed': 7419127834,
                            'gasRequired': 74999922688,
                            'storageDeposit': {'charge': '0x0'},
                            'debugMessage': '',
                            'result': {'Ok': {'flags': 0, 'data': '0x00'}}
                        },
                        'id': self.request_id}

                return super().rpc_request(method, params, result_handler)

        cls.substrate = MockedSubstrateInterface(url=settings.KUSAMA_NODE_URL, type_registry_preset='canvas')
        # cls.substrate = SubstrateInterface(url='ws://127.0.0.1:9944')

        cls.keypair = Keypair.create_from_uri('//Alice')

    def setUp(self) -> None:
        self.contract = ContractInstance.create_from_address(
            contract_address="5GhwarrVMH8kjb8XyW6zCfURHbHy3v84afzLbADyYYX6H2Kk",
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'flipper-v3.json'),
            substrate=self.substrate
        )

    def test_instance_read(self):

        result = self.contract.read(self.keypair, 'get')

        self.assertEqual(False, result.contract_result_data.value)

    def test_instance_read_at_not_best_block(self):
        parent_hash = self.substrate.get_block_header()['header']['parentHash']
        result = self.contract.read(self.keypair, 'get', block_hash = parent_hash)

        self.assertEqual(False, result.contract_result_data.value)


class FlipperInstanceV4TestCase(FlipperInstanceTestCase):
    def setUp(self) -> None:
        self.contract = ContractInstance.create_from_address(
            contract_address="5DaohteAvvR9PZEhynqWvbFT8HEaHNuiiPTZV61VEUHnqsfU",
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'flipper-v4.json'),
            substrate=self.substrate
        )


class FlipperInstanceV5TestCase(FlipperInstanceTestCase):

    @classmethod
    def setUpClass(cls):

        class MockedSubstrateInterface(SubstrateInterface):

            def rpc_request(self, method, params, result_handler=None):
                if method == 'state_call':
                    return {
                        'jsonrpc': '2.0',
                         'result': '0x1a987a663dbd8e5cf16786bc0100010000000000000000000000000000000000000000000008000000',
                         'id': 16
                    }
                if method == 'contracts_call':
                    return {
                        'jsonrpc': '2.0',
                        'result': {
                            'gasConsumed': 7419127834,
                            'gasRequired': 74999922688,
                            'storageDeposit': {'charge': '0x0'},
                            'debugMessage': '',
                            'result': {'Ok': {'flags': 0, 'data': '0x0000'}}
                        },
                        'id': self.request_id}

                return super().rpc_request(method, params, result_handler)

        cls.substrate = MockedSubstrateInterface(
            url=settings.KUSAMA_NODE_URL, type_registry_preset='canvas', type_registry={'types': {"ContractExecResult": "ContractExecResultTo269"}}
        )

        cls.keypair = Keypair.create_from_uri('//Alice')

    def setUp(self) -> None:
        self.contract = ContractInstance.create_from_address(
            contract_address="5DaohteAvvR9PZEhynqWvbFT8HEaHNuiiPTZV61VEUHnqsfU",
            metadata_file=os.path.join(os.path.dirname(__file__), 'fixtures', 'flipper-v5.json'),
            substrate=self.substrate
        )

    def test_instance_read(self):

        result = self.contract.read(self.keypair, 'get')

        self.assertEqual({'Ok': False}, result.contract_result_data.value)

    def test_instance_read_at_not_best_block(self):
        parent_hash = self.substrate.get_block_header()['header']['parentHash']
        result = self.contract.read(self.keypair, 'get', block_hash=parent_hash)

        self.assertEqual({'Ok': False}, result.contract_result_data.value)


if __name__ == '__main__':
    unittest.main()