import os
import unittest
import json
import logging

import web3
import eth_tester

from eth_accounts_index import AccountRegistry

logging.basicConfig(level=logging.DEBUG)
logg = logging.getLogger()

testdir = os.path.dirname(__file__)


class Test(unittest.TestCase):

    def setUp(self):
        eth_params = eth_tester.backends.pyevm.main.get_default_genesis_params({
            'gas_limit': 9000000,
            })

        f = open(os.path.join(testdir, '../eth_accounts_index/data/AccountsIndex.bin'), 'r')
        bytecode = f.read()
        f.close()

        f = open(os.path.join(testdir, '../eth_accounts_index/data/AccountsIndex.abi.json'), 'r')
        abi = json.load(f)
        f.close()

        backend = eth_tester.PyEVMBackend(eth_params)
        self.eth_tester =  eth_tester.EthereumTester(backend)
        provider = web3.Web3.EthereumTesterProvider(self.eth_tester)
        self.w3 = web3.Web3(provider)
        c = self.w3.eth.contract(abi=abi, bytecode=bytecode)
        tx_hash = c.constructor().transact({'from': self.w3.eth.accounts[0]})

        r = self.w3.eth.getTransactionReceipt(tx_hash)

        self.address = r.contractAddress
        c = self.w3.eth.contract(abi=abi, address=self.address)

        c.functions.addWriter(self.w3.eth.accounts[1]).transact()


    def tearDown(self):
        pass


    def test_basic(self):
        registry = AccountRegistry(self.w3, self.address)
        self.assertEqual(registry.count(), 1); # count starts at 1, first addess is always 0x0


    def test_access(self):
        registry = AccountRegistry(self.w3, self.address, self.w3.eth.accounts[1])
        registry.add(self.w3.eth.accounts[2])
        self.eth_tester.mine_block()
        self.assertEqual(registry.count(), 2)

        # account 2 does not have access
        registry = AccountRegistry(self.w3, self.address, self.w3.eth.accounts[2])
        registry.add(self.w3.eth.accounts[2])
        self.eth_tester.mine_block()
        self.assertEqual(registry.count(), 2)

        # after this account 2 has access
        registry.contract.functions.addWriter(self.w3.eth.accounts[2]).transact()
        registry.add(self.w3.eth.accounts[3])
        self.eth_tester.mine_block()
        self.assertEqual(registry.count(), 3)

        # after this account 2 no longer has access
        registry.contract.functions.deleteWriter(self.w3.eth.accounts[2]).transact()
        registry.add(self.w3.eth.accounts[3])
        self.eth_tester.mine_block()
        self.assertEqual(registry.count(), 3)


    def test_indices(self):
        registry = AccountRegistry(self.w3, self.address, self.w3.eth.accounts[1])
        registry.add(self.w3.eth.accounts[2])

        self.assertTrue(registry.have(self.w3.eth.accounts[2]))
        self.assertFalse(registry.have(self.w3.eth.accounts[3]))


    def test_no_duplicates(self):
        registry = AccountRegistry(self.w3, self.address, self.w3.eth.accounts[1])
        tx_hash = registry.add(self.w3.eth.accounts[2])
        self.eth_tester.mine_block()
        tx_hash = registry.add(self.w3.eth.accounts[3])
        self.eth_tester.mine_block()
        # BUG: eth_tester does not detect the duplicate here, but does in the test.py file in the solidity folder
        #self.assertRaises(Exception):
        tx_hash = registry.add(self.w3.eth.accounts[2]) 
        self.eth_tester.mine_block()


    def test_list(self):
        registry = AccountRegistry(self.w3, self.address, self.w3.eth.accounts[1])

        for i in range(2, 10):
            registry.add(self.w3.eth.accounts[i])

        self.assertEqual(registry.count(), 9)

        accounts_reverse = []
        for i in range(9, 1, -1):
            accounts_reverse.append(self.w3.eth.accounts[i])

        accounts_list = registry.last(8)
        for i in range(8):
            self.assertEqual(accounts_list[i], accounts_reverse[i])


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