'use strict';

import assert from "assert";

import { ethers } from "ethers";

import contractData from "./test-contract.json";

const provider = new ethers.providers.InfuraProvider("rinkeby", "49a0efa3aaee4fd99797bfa94d8ce2f1");
//const provider = ethers.getDefaultProvider("rinkeby");

const TIMEOUT_PERIOD = 120000;

const contract = (function() {
    return new ethers.Contract(contractData.contractAddress, contractData.interface, provider);
})();

function equals(name: string, actual: any, expected: any): void {
    if (Array.isArray(expected)) {
        assert.equal(actual.length, expected.length, 'array length mismatch - '  + name);
        expected.forEach(function(expected, index) {
            equals(name + ':' + index, actual[index], expected);
        });
        return;
    }

    if (typeof(actual) === 'object') {
        if (expected.indexed) {
            assert.ok(ethers.Contract.isIndexed(actual), 'index property has index - ' + name);
            if (expected.hash) {
                assert.equal(actual.hash, expected.hash, 'index property with known hash matches - ' + name);
            }
            return;
        }

        if (actual.eq) {
            assert.ok(actual.eq(expected), 'numeric value matches - ' + name);
        }
    }

    assert.equal(actual, expected, 'value matches - ' + name);
}

async function TestContractEvents() {
    const data = await ethers.utils.fetchJson('https://api.ethers.io/api/v1/?action=triggerTest&address=' + contract.address);

    console.log('*** Triggered Transaction Hash: ' + data.hash);

    contract.on("error", (error) => {
        console.log(error);
        assert(false);
        contract.removeAllListeners();
    });

    function waitForEvent(eventName: string, expected: Array<any>): Promise<void> {
        return new Promise(function(resolve, reject) {
            let done = false;
            contract.on(eventName, function() {
                if (done) { return; }
                done = true;

                let args = Array.prototype.slice.call(arguments);
                let event = args[args.length - 1];
                event.removeListener();
                equals(event.event, args.slice(0, args.length - 1), expected);
                resolve();
            });

            const timer = setTimeout(() => {
                if (done) { return; }
                done = true;

                contract.removeAllListeners();
                reject(new Error("timeout"));
            }, TIMEOUT_PERIOD);
            if (timer.unref) { timer.unref(); }
        });
    }

    return new Promise(function(resolve, reject) {
        let p0 = '0x06B5955A67D827CDF91823E3bB8F069e6c89c1D6';
        let p0_1 = '0x06b5955A67d827CdF91823e3Bb8F069e6C89C1d7';
        let p1 = 0x42;
        let p1_1 = 0x43;

        return Promise.all([
            waitForEvent('Test', [ p0, p1 ]),
            waitForEvent('TestP0', [ p0, p1 ]),
            waitForEvent('TestP0P1', [ p0, p1 ]),
            waitForEvent('TestIndexedString', [ { indexed: true, hash: '0x7c5ea36004851c764c44143b1dcb59679b11c9a68e5f41497f6cf3d480715331' }, p1 ]),
            waitForEvent('TestV2', [ { indexed: true }, [ p0, p1 ] ]),
            waitForEvent('TestV2Nested', [ { indexed: true }, [ p0_1, p1_1, [ p0, p1 ] ] ]),
        ]).then(function(result) {
            resolve(result);
        });
    });
}

describe('Test Contract Objects', function() {

    it('parses events', function() {
        this.timeout(TIMEOUT_PERIOD);
        return TestContractEvents();
    });

    it('ABIv2 parameters and return types work', function() {
        this.timeout(TIMEOUT_PERIOD);
        let p0 = '0x06B5955A67D827CDF91823E3bB8F069e6c89c1D6';
        let p0_0f = '0x06B5955a67d827cDF91823e3bB8F069E6c89c1e5';
        let p0_f0 = '0x06b5955a67D827CDF91823e3Bb8F069E6C89c2C6';
        let p1 = 0x42;
        let p1_0f = 0x42 + 0x0f;
        let p1_f0 = 0x42 + 0xf0;

        let expectedPosStruct: any = [ p0_f0, p1_f0, [ p0_0f, p1_0f ] ];

        let seq = Promise.resolve();
        [
            [ p0, p1, [ p0, p1 ] ],
            { p0: p0, p1: p1, child: [ p0, p1 ] },
            [ p0, p1, { p0: p0, p1: p1 } ],
            { p0: p0, p1: p1, child: { p0: p0, p1: p1 } }
        ].forEach(function(struct) {
            seq = seq.then(function() {
                return contract.testV2(struct).then((result: any) => {
                    equals('position input', result, expectedPosStruct);
                    equals('keyword input p0', result.p0, expectedPosStruct[0]);
                    equals('keyword input p1', result.p1, expectedPosStruct[1]);
                    equals('keyword input child.p0', result.child.p0, expectedPosStruct[2][0]);
                    equals('keyword input child.p1', result.child.p1, expectedPosStruct[2][1]);
                });
            });
        });

        return seq;
    });

    it('collapses single argument solidity methods', function() {
        this.timeout(TIMEOUT_PERIOD);
        return contract.testSingleResult(4).then((result: any) => {
            assert.equal(result, 5, 'single value returned');
        });
    });

    it('does not collapses multi argument solidity methods', function() {
        this.timeout(TIMEOUT_PERIOD);
        return contract.testMultiResult(6).then((result: any) => {
            assert.equal(result[0], 7, 'multi value [0] returned');
            assert.equal(result[1], 8, 'multi value [1] returned');
            assert.equal(result.r0, 7, 'multi value [r0] returned');
            assert.equal(result.r1, 8, 'multi value [r1] returned');
        });
    });
});

// @TODO: Exapnd this
describe("Test Contract Transaction Population", function() {
    const abi = [
        "function transfer(address to, uint amount)",
        "function unstake() nonpayable",
        "function mint() payable",
        "function balanceOf(address owner) view returns (uint)"
    ];

    const testAddress = "0xdeadbeef00deadbeef01deadbeef02deadbeef03"
    const testAddressCheck = "0xDEAdbeeF00deAdbeEF01DeAdBEEF02DeADBEEF03";
    const fireflyAddress = "0x8ba1f109551bD432803012645Ac136ddd64DBA72";

    const contract = new ethers.Contract(testAddress, abi);
    const contractConnected = contract.connect(ethers.getDefaultProvider());

    it("standard population", async function() {
        const tx = await contract.populateTransaction.balanceOf(testAddress);
        //console.log(tx);
        assert.equal(Object.keys(tx).length, 2, "correct number of keys");
        assert.equal(tx.data, "0x70a08231000000000000000000000000deadbeef00deadbeef01deadbeef02deadbeef03", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
    });

    it("allows 'from' overrides", async function() {
        const tx = await contract.populateTransaction.balanceOf(testAddress, {
            from: testAddress
        });
        //console.log(tx);

        assert.equal(Object.keys(tx).length, 3, "correct number of keys");
        assert.equal(tx.data, "0x70a08231000000000000000000000000deadbeef00deadbeef01deadbeef02deadbeef03", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal((<any>tx).from, testAddressCheck, "from address matches");
    });

    it("allows ENS 'from' overrides", async function() {
        this.timeout(20000);

        const tx = await contractConnected.populateTransaction.balanceOf(testAddress, {
            from: "ricmoo.firefly.eth"
        });
        //console.log(tx);

        assert.equal(Object.keys(tx).length, 3, "correct number of keys");
        assert.equal(tx.data, "0x70a08231000000000000000000000000deadbeef00deadbeef01deadbeef02deadbeef03", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal((<any>tx).from, fireflyAddress, "from address matches");
    });

    it("allows send overrides", async function() {
        const tx = await contract.populateTransaction.mint({
            gasLimit: 150000,
            gasPrice: 1900000000,
            nonce: 5,
            value: 1234,
            from: testAddress
        });
        //console.log(tx);

        assert.equal(Object.keys(tx).length, 7, "correct number of keys");
        assert.equal(tx.data, "0x1249c58b", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal(tx.nonce, 5, "nonce address matches");
        assert.ok(tx.gasLimit.eq(150000), "gasLimit matches");
        assert.ok(tx.gasPrice.eq(1900000000), "gasPrice matches");
        assert.ok(tx.value.eq(1234), "value matches");
        assert.equal(tx.from, testAddressCheck, "from address matches");
    });

    it("allows zero 'value' to non-payable", async function() {
        const tx = await contract.populateTransaction.unstake({
            from: testAddress,
            value: 0
        });
        //console.log(tx);

        assert.equal(Object.keys(tx).length, 3, "correct number of keys");
        assert.equal(tx.data, "0x2def6620", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal(tx.from, testAddressCheck, "from address matches");
    });

    // @TODO: Add test cases to check for fault cases
    // - cannot send non-zero value to non-payable
    // - using the wrong from for a Signer-connected contract
    it("forbids non-zero 'value' to non-payable", async function() {
        try {
            const tx = await contract.populateTransaction.unstake({
                value: 1
            });
            console.log("Tx", tx);
            assert.ok(false, "throws on non-zero value to non-payable");
        } catch(error) {
            assert.ok(error.operation === "overrides.value");
        }
    });

    it("allows overriding same 'from' with a Signer", async function() {
        const contractSigner = contract.connect(testAddress);
        const tx = await contractSigner.populateTransaction.unstake({
            from: testAddress
        });
        //console.log(tx);

        assert.equal(Object.keys(tx).length, 3, "correct number of keys");
        assert.equal(tx.data, "0x2def6620", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal(tx.from, testAddressCheck, "from address matches");
    });

    it("forbids overriding 'from' with a Signer", async function() {
        const contractSigner = contract.connect(testAddress);
        try {
            const tx = await contractSigner.populateTransaction.unstake({
                from: fireflyAddress
            });
            console.log("Tx", tx);
            assert.ok(false, "throws on non-zero value to non-payable");
        } catch(error) {
            assert.ok(error.operation === "overrides.from");
        }
    });

    it("allows overriding with invalid, but nullish values", async function() {
        const contractSigner = contract.connect(testAddress);
        const tx = await contractSigner.populateTransaction.unstake({
            blockTag: null,
            from: null
        });
        //console.log("Tx", tx);
        assert.equal(Object.keys(tx).length, 3, "correct number of keys");
        assert.equal(tx.data, "0x2def6620", "data matches");
        assert.equal(tx.to, testAddressCheck, "to address matches");
        assert.equal(tx.from, testAddressCheck.toLowerCase(), "from address matches");
    });

});

/*
// Test Contract interaction inside Grid-deployed Geth
describe("Test Contract Life-Cycle", function() {
    this.timeout(10000);

    let blockNumber: number = null;

    before(async function() {
        const provider = ethers.getDefaultProvider();
        blockNumber = await provider.getBlockNumber();
        //console.log(blockNumber);
        this.skip();
    });

    it("says hi", function() {
        console.log("hi", blockNumber);
    });
});
*/