import { ZeroEx } from '0x.js';
import { BlockchainLifecycle } from '@0xproject/dev-utils';
import { BigNumber } from '@0xproject/utils';
import * as chai from 'chai';
import * as Web3 from 'web3';

import { AssetProxyDispatcherContract } from '../../src/contract_wrappers/generated/asset_proxy_dispatcher';
import { DummyERC20TokenContract } from '../../src/contract_wrappers/generated/dummy_e_r_c20_token';
import { DummyERC721TokenContract } from '../../src/contract_wrappers/generated/dummy_e_r_c721_token';
import { ERC20ProxyContract } from '../../src/contract_wrappers/generated/e_r_c20_proxy';
import { ERC721ProxyContract } from '../../src/contract_wrappers/generated/e_r_c721_proxy';
import { assetProxyUtils } from '../../src/utils/asset_proxy_utils';
import { constants } from '../../src/utils/constants';
import { ERC20Wrapper } from '../../src/utils/erc20_wrapper';
import { ERC721Wrapper } from '../../src/utils/erc721_wrapper';
import { AssetProxyId, ContractName } from '../../src/utils/types';
import { chaiSetup } from '../utils/chai_setup';
import { deployer } from '../utils/deployer';
import { provider, web3Wrapper } from '../utils/web3_wrapper';

chaiSetup.configure();
const expect = chai.expect;
const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);

describe('Asset Transfer Proxies', () => {
    let owner: string;
    let notAuthorized: string;
    let assetProxyDispatcherAddress: string;
    let makerAddress: string;
    let takerAddress: string;

    let zrx: DummyERC20TokenContract;
    let erc721Token: DummyERC721TokenContract;
    let erc20Proxy: ERC20ProxyContract;
    let erc721Proxy: ERC721ProxyContract;

    let erc20Wrapper: ERC20Wrapper;
    let erc721Wrapper: ERC721Wrapper;
    let erc721MakerTokenId: BigNumber;

    before(async () => {
        const accounts = await web3Wrapper.getAvailableAddressesAsync();
        const usedAddresses = ([
            owner,
            notAuthorized,
            assetProxyDispatcherAddress,
            makerAddress,
            takerAddress,
        ] = accounts);

        erc20Wrapper = new ERC20Wrapper(deployer, provider, usedAddresses, owner);
        erc721Wrapper = new ERC721Wrapper(deployer, provider, usedAddresses, owner);

        [zrx] = await erc20Wrapper.deployDummyERC20TokensAsync();
        erc20Proxy = await erc20Wrapper.deployERC20ProxyAsync();
        await erc20Wrapper.setBalancesAndAllowancesAsync();
        await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(assetProxyDispatcherAddress, {
            from: owner,
        });

        [erc721Token] = await erc721Wrapper.deployDummyERC721TokensAsync();
        erc721Proxy = await erc721Wrapper.deployERC721ProxyAsync();
        await erc721Wrapper.setBalancesAndAllowancesAsync();
        const erc721Balances = await erc721Wrapper.getBalancesAsync();
        erc721MakerTokenId = erc721Balances[makerAddress][erc721Token.address][0];
        await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(assetProxyDispatcherAddress, {
            from: owner,
        });
    });
    beforeEach(async () => {
        await blockchainLifecycle.startAsync();
    });
    afterEach(async () => {
        await blockchainLifecycle.revertAsync();
    });
    describe('Transfer Proxy - ERC20', () => {
        it('should successfully transfer tokens', async () => {
            // Construct metadata for ERC20 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
            // Perform a transfer from makerAddress to takerAddress
            const erc20Balances = await erc20Wrapper.getBalancesAsync();
            const amount = new BigNumber(10);
            await erc20Proxy.transferFrom.sendTransactionAsync(
                encodedProxyMetadata,
                makerAddress,
                takerAddress,
                amount,
                { from: assetProxyDispatcherAddress },
            );
            // Verify transfer was successful
            const newBalances = await erc20Wrapper.getBalancesAsync();
            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
                erc20Balances[makerAddress][zrx.address].minus(amount),
            );
            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
                erc20Balances[takerAddress][zrx.address].add(amount),
            );
        });

        it('should do nothing if transferring 0 amount of a token', async () => {
            // Construct metadata for ERC20 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
            // Perform a transfer from makerAddress to takerAddress
            const erc20Balances = await erc20Wrapper.getBalancesAsync();
            const amount = new BigNumber(0);
            await erc20Proxy.transferFrom.sendTransactionAsync(
                encodedProxyMetadata,
                makerAddress,
                takerAddress,
                amount,
                { from: assetProxyDispatcherAddress },
            );
            // Verify transfer was successful
            const newBalances = await erc20Wrapper.getBalancesAsync();
            expect(newBalances[makerAddress][zrx.address]).to.be.bignumber.equal(
                erc20Balances[makerAddress][zrx.address],
            );
            expect(newBalances[takerAddress][zrx.address]).to.be.bignumber.equal(
                erc20Balances[takerAddress][zrx.address],
            );
        });

        it('should throw if allowances are too low', async () => {
            // Construct metadata for ERC20 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
            // Create allowance less than transfer amount. Set allowance on proxy.
            const allowance = new BigNumber(0);
            const transferAmount = new BigNumber(10);
            await zrx.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
                from: makerAddress,
            });
            // Perform a transfer; expect this to fail.
            return expect(
                erc20Proxy.transferFrom.sendTransactionAsync(
                    encodedProxyMetadata,
                    makerAddress,
                    takerAddress,
                    transferAmount,
                    { from: notAuthorized },
                ),
            ).to.be.rejectedWith(constants.REVERT);
        });

        it('should throw if requesting address is not authorized', async () => {
            // Construct metadata for ERC20 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC20ProxyData(zrx.address);
            // Perform a transfer from makerAddress to takerAddress
            const amount = new BigNumber(10);
            return expect(
                erc20Proxy.transferFrom.sendTransactionAsync(encodedProxyMetadata, makerAddress, takerAddress, amount, {
                    from: notAuthorized,
                }),
            ).to.be.rejectedWith(constants.REVERT);
        });
    });

    describe('Transfer Proxy - ERC721', () => {
        it('should successfully transfer tokens', async () => {
            // Construct metadata for ERC721 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC721ProxyData(erc721Token.address, erc721MakerTokenId);
            // Verify pre-condition
            const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
            expect(ownerMakerAsset).to.be.bignumber.equal(makerAddress);
            // Perform a transfer from makerAddress to takerAddress
            const erc20Balances = await erc20Wrapper.getBalancesAsync();
            const amount = new BigNumber(1);
            await erc721Proxy.transferFrom.sendTransactionAsync(
                encodedProxyMetadata,
                makerAddress,
                takerAddress,
                amount,
                { from: assetProxyDispatcherAddress },
            );
            // Verify transfer was successful
            const newOwnerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
            expect(newOwnerMakerAsset).to.be.bignumber.equal(takerAddress);
        });

        it('should throw if transferring 0 amount of a token', async () => {
            // Construct metadata for ERC721 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC721ProxyData(erc721Token.address, erc721MakerTokenId);
            // Verify pre-condition
            const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
            expect(ownerMakerAsset).to.be.bignumber.equal(makerAddress);
            // Perform a transfer from makerAddress to takerAddress
            const erc20Balances = await erc20Wrapper.getBalancesAsync();
            const amount = new BigNumber(0);
            return expect(
                erc721Proxy.transferFrom.sendTransactionAsync(
                    encodedProxyMetadata,
                    makerAddress,
                    takerAddress,
                    amount,
                    { from: assetProxyDispatcherAddress },
                ),
            ).to.be.rejectedWith(constants.REVERT);
        });

        it('should throw if transferring > 1 amount of a token', async () => {
            // Construct metadata for ERC721 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC721ProxyData(erc721Token.address, erc721MakerTokenId);
            // Verify pre-condition
            const ownerMakerAsset = await erc721Token.ownerOf.callAsync(erc721MakerTokenId);
            expect(ownerMakerAsset).to.be.bignumber.equal(makerAddress);
            // Perform a transfer from makerAddress to takerAddress
            const erc20Balances = await erc20Wrapper.getBalancesAsync();
            const amount = new BigNumber(500);
            return expect(
                erc721Proxy.transferFrom.sendTransactionAsync(
                    encodedProxyMetadata,
                    makerAddress,
                    takerAddress,
                    amount,
                    { from: assetProxyDispatcherAddress },
                ),
            ).to.be.rejectedWith(constants.REVERT);
        });

        it('should throw if allowances are too low', async () => {
            // Construct metadata for ERC721 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC721ProxyData(erc721Token.address, erc721MakerTokenId);
            // Remove transfer approval for makerAddress.
            await erc721Token.setApprovalForAll.sendTransactionAsync(erc721Proxy.address, false, {
                from: makerAddress,
            });
            // Perform a transfer; expect this to fail.
            const amount = new BigNumber(1);
            return expect(
                erc20Proxy.transferFrom.sendTransactionAsync(encodedProxyMetadata, makerAddress, takerAddress, amount, {
                    from: notAuthorized,
                }),
            ).to.be.rejectedWith(constants.REVERT);
        });

        it('should throw if requesting address is not authorized', async () => {
            // Construct metadata for ERC721 proxy
            const encodedProxyMetadata = assetProxyUtils.encodeERC721ProxyData(erc721Token.address, erc721MakerTokenId);
            // Perform a transfer from makerAddress to takerAddress
            const amount = new BigNumber(1);
            return expect(
                erc721Proxy.transferFrom.sendTransactionAsync(
                    encodedProxyMetadata,
                    makerAddress,
                    takerAddress,
                    amount,
                    { from: notAuthorized },
                ),
            ).to.be.rejectedWith(constants.REVERT);
        });
    });
});