import * as bitcoin from '..';
const { describe, it } = require('mocha');
const assert = require('assert');
const base58 = require('bs58');

const base58EncodeDecode = require('../ts_test/fixtures/core/base58_encode_decode.json');
const base58KeysInvalid = require('../ts_test/fixtures/core/base58_keys_invalid.json');
const base58KeysValid = require('../ts_test/fixtures/core/base58_keys_valid.json');
const blocksValid = require('../ts_test/fixtures/core/blocks.json');
const sigCanonical = require('../ts_test/fixtures/core/sig_canonical.json');
const sigHash = require('../ts_test/fixtures/core/sighash.json');
const sigNoncanonical = require('../ts_test/fixtures/core/sig_noncanonical.json');
const txValid = require('../ts_test/fixtures/core/tx_valid.json');

describe('Bitcoin-core', () => {
  // base58EncodeDecode
  describe('base58', () => {
    base58EncodeDecode.forEach(f => {
      const fhex = f[0];
      const fb58 = f[1];

      it('can decode ' + fb58, () => {
        const buffer = base58.decode(fb58);
        const actual = buffer.toString('hex');

        assert.strictEqual(actual, fhex);
      });

      it('can encode ' + fhex, () => {
        const buffer = Buffer.from(fhex, 'hex');
        const actual = base58.encode(buffer);

        assert.strictEqual(actual, fb58);
      });
    });
  });

  // base58KeysValid
  describe('address.toBase58Check', () => {
    const typeMap = {
      pubkey: 'pubKeyHash',
      script: 'scriptHash',
    };

    base58KeysValid.forEach(f => {
      const expected = f[0];
      const hash = Buffer.from(f[1], 'hex');
      const params = f[2];

      if (params.isPrivkey) return;

      const network = params.isTestnet
        ? bitcoin.networks.testnet
        : bitcoin.networks.bitcoin;
      const version = network[typeMap[params.addrType]];

      it('can export ' + expected, () => {
        assert.strictEqual(
          bitcoin.address.toBase58Check(hash, version),
          expected,
        );
      });
    });
  });

  // base58KeysInvalid
  describe('address.fromBase58Check', () => {
    const allowedNetworks = [
      bitcoin.networks.bitcoin.pubKeyHash,
      bitcoin.networks.bitcoin.scriptHash,
      bitcoin.networks.testnet.pubKeyHash,
      bitcoin.networks.testnet.scriptHash,
    ];

    base58KeysInvalid.forEach(f => {
      const string0 = f[0];

      it('throws on ' + string0, () => {
        assert.throws(() => {
          const address = bitcoin.address.fromBase58Check(string0);

          assert.notStrictEqual(
            allowedNetworks.indexOf(address.version),
            -1,
            'Invalid network',
          );
        }, /(Invalid (checksum|network))|(too (short|long))/);
      });
    });
  });

  // base58KeysValid
  describe('ECPair', () => {
    base58KeysValid.forEach(f => {
      const string0 = f[0];
      const hex = f[1];
      const params = f[2];

      if (!params.isPrivkey) return;

      const network = params.isTestnet
        ? bitcoin.networks.testnet
        : bitcoin.networks.bitcoin;
      const keyPair = bitcoin.ECPair.fromWIF(string0, network);

      it('fromWIF imports ' + string0, () => {
        assert.strictEqual(keyPair.privateKey.toString('hex'), hex);
        assert.strictEqual(keyPair.compressed, params.isCompressed);
      });

      it('toWIF exports ' + hex + ' to ' + string0, () => {
        assert.strictEqual(keyPair.toWIF(), string0);
      });
    });
  });

  // base58KeysInvalid
  describe('ECPair.fromWIF', () => {
    const allowedNetworks = [
      bitcoin.networks.bitcoin,
      bitcoin.networks.testnet,
    ];

    base58KeysInvalid.forEach(f => {
      const string0 = f[0];

      it('throws on ' + string0, () => {
        assert.throws(() => {
          bitcoin.ECPair.fromWIF(string0, allowedNetworks);
        }, /(Invalid|Unknown) (checksum|compression flag|network version|WIF length)/);
      });
    });
  });

  describe('Block.fromHex', () => {
    blocksValid.forEach(f => {
      it('can parse ' + f.id, () => {
        const block = bitcoin.Block.fromHex(f.hex);

        assert.strictEqual(block.getId(), f.id);
        assert.strictEqual(block.transactions.length, f.transactions);
      });
    });
  });

  // txValid
  describe('Transaction.fromHex', () => {
    txValid.forEach(f => {
      // Objects that are only a single string are ignored
      if (f.length === 1) return;

      const inputs = f[0];
      const fhex = f[1];
      //      const verifyFlags = f[2] // TODO: do we need to test this?

      it('can decode ' + fhex, () => {
        const transaction = bitcoin.Transaction.fromHex(fhex);

        transaction.ins.forEach((txIn, i) => {
          const input = inputs[i];

          // reverse because test data is reversed
          const prevOutHash = Buffer.from(input[0], 'hex').reverse();
          const prevOutIndex = input[1];

          assert.deepStrictEqual(txIn.hash, prevOutHash);

          // we read UInt32, not Int32
          assert.strictEqual(txIn.index & 0xffffffff, prevOutIndex);
        });
      });
    });
  });

  // sighash
  describe('Transaction', () => {
    sigHash.forEach(f => {
      // Objects that are only a single string are ignored
      if (f.length === 1) return;

      const txHex = f[0];
      const scriptHex = f[1];
      const inIndex = f[2];
      const hashType = f[3];
      const expectedHash = f[4];

      const hashTypes = [];
      if ((hashType & 0x1f) === bitcoin.Transaction.SIGHASH_NONE)
        hashTypes.push('SIGHASH_NONE');
      else if ((hashType & 0x1f) === bitcoin.Transaction.SIGHASH_SINGLE)
        hashTypes.push('SIGHASH_SINGLE');
      else hashTypes.push('SIGHASH_ALL');
      if (hashType & bitcoin.Transaction.SIGHASH_ANYONECANPAY)
        hashTypes.push('SIGHASH_ANYONECANPAY');

      const hashTypeName = hashTypes.join(' | ');

      it(
        'should hash ' + txHex.slice(0, 40) + '... (' + hashTypeName + ')',
        () => {
          const transaction = bitcoin.Transaction.fromHex(txHex);
          assert.strictEqual(transaction.toHex(), txHex);

          const script = Buffer.from(scriptHex, 'hex');
          const scriptChunks = bitcoin.script.decompile(script);
          assert.strictEqual(
            bitcoin.script.compile(scriptChunks).toString('hex'),
            scriptHex,
          );

          const hash = transaction.hashForSignature(inIndex, script, hashType);

          // reverse because test data is reversed
          // @ts-ignore
          assert.strictEqual(hash.reverse().toString('hex'), expectedHash);
        },
      );
    });
  });

  describe('script.signature.decode', () => {
    sigCanonical.forEach(hex => {
      const buffer = Buffer.from(hex, 'hex');

      it('can parse ' + hex, () => {
        const parsed = bitcoin.script.signature.decode(buffer);
        const actual = bitcoin.script.signature.encode(
          parsed.signature,
          parsed.hashType,
        );

        assert.strictEqual(actual.toString('hex'), hex);
      });
    });

    sigNoncanonical.forEach((hex, i) => {
      if (i === 0) return;
      if (i % 2 !== 0) return;

      const description = sigNoncanonical[i - 1].slice(0, -1);
      const buffer = Buffer.from(hex, 'hex');

      it('throws on ' + description, () => {
        const regexStatement =
          'Expected DER (integer|sequence)|(R|S) value (excessively padded|is' +
          ' negative)|(R|S|DER sequence) length is (zero|too short|too long|i' +
          'nvalid)|Invalid hashType';
        assert.throws(() => {
          bitcoin.script.signature.decode(buffer);
        }, new RegExp(regexStatement));
      });
    });
  });
});

export {};