// Copyright (c) 2014-2016 The btcsuite developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.

package dagconfig

import (
	"bytes"
	"testing"

	"github.com/davecgh/go-spew/spew"
)

// TestGenesisBlock tests the genesis block of the main network for validity by
// checking the encoded bytes and hashes.
func TestGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := MainNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestGenesisBlock: %v", err)
	}

	// Ensure the encoded block matches the expected bytes.
	if !bytes.Equal(buf.Bytes(), genesisBlockBytes) {
		t.Fatalf("TestGenesisBlock: Genesis block does not appear valid - "+
			"got %v, want %v", spew.Sdump(buf.Bytes()),
			spew.Sdump(genesisBlockBytes))
	}

	// Check hash of the block against expected hash.
	hash := MainNetParams.GenesisBlock.BlockHash()
	if !MainNetParams.GenesisHash.IsEqual(hash) {
		t.Fatalf("TestGenesisBlock: Genesis block hash does not "+
			"appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(MainNetParams.GenesisHash))
	}
}

// TestRegTestGenesisBlock tests the genesis block of the regression test
// network for validity by checking the encoded bytes and hashes.
func TestRegTestGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := RegressionNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestRegTestGenesisBlock: %v", err)
	}

	// Ensure the encoded block matches the expected bytes.
	if !bytes.Equal(buf.Bytes(), regTestGenesisBlockBytes) {
		t.Fatalf("TestRegTestGenesisBlock: Genesis block does not "+
			"appear valid - got %v, want %v",
			spew.Sdump(buf.Bytes()),
			spew.Sdump(regTestGenesisBlockBytes))
	}

	// Check hash of the block against expected hash.
	hash := RegressionNetParams.GenesisBlock.BlockHash()
	if !RegressionNetParams.GenesisHash.IsEqual(hash) {
		t.Fatalf("TestRegTestGenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(RegressionNetParams.GenesisHash))
	}
}

// TestTestNet3GenesisBlock tests the genesis block of the test network (version
// 3) for validity by checking the encoded bytes and hashes.
func TestTestNet3GenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := TestNet3Params.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestTestNet3GenesisBlock: %v", err)
	}

	// Ensure the encoded block matches the expected bytes.
	if !bytes.Equal(buf.Bytes(), testNet3GenesisBlockBytes) {
		t.Fatalf("TestTestNet3GenesisBlock: Genesis block does not "+
			"appear valid - got %v, want %v",
			spew.Sdump(buf.Bytes()),
			spew.Sdump(testNet3GenesisBlockBytes))
	}

	// Check hash of the block against expected hash.
	hash := TestNet3Params.GenesisBlock.BlockHash()
	if !TestNet3Params.GenesisHash.IsEqual(hash) {
		t.Fatalf("TestTestNet3GenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(TestNet3Params.GenesisHash))
	}
}

// TestSimNetGenesisBlock tests the genesis block of the simulation test network
// for validity by checking the encoded bytes and hashes.
func TestSimNetGenesisBlock(t *testing.T) {
	// Encode the genesis block to raw bytes.
	var buf bytes.Buffer
	err := SimNetParams.GenesisBlock.Serialize(&buf)
	if err != nil {
		t.Fatalf("TestSimNetGenesisBlock: %v", err)
	}

	// Ensure the encoded block matches the expected bytes.
	if !bytes.Equal(buf.Bytes(), simNetGenesisBlockBytes) {
		t.Fatalf("TestSimNetGenesisBlock: Genesis block does not "+
			"appear valid - got %v, want %v",
			spew.Sdump(buf.Bytes()),
			spew.Sdump(simNetGenesisBlockBytes))
	}

	// Check hash of the block against expected hash.
	hash := SimNetParams.GenesisBlock.BlockHash()
	if !SimNetParams.GenesisHash.IsEqual(hash) {
		t.Fatalf("TestSimNetGenesisBlock: Genesis block hash does "+
			"not appear valid - got %v, want %v", spew.Sdump(hash),
			spew.Sdump(SimNetParams.GenesisHash))
	}
}

// genesisBlockBytes are the wire encoded bytes for the genesis block of the
// main network as of protocol version 60002.
var genesisBlockBytes = []byte{
	0x01, 0x00, 0x00, 0x00, 0x00, 0xd4, 0xdc, 0x8b,
	0xb8, 0x76, 0x57, 0x9d, 0x7d, 0xe9, 0x9d, 0xae,
	0xdb, 0xf8, 0x22, 0xd2, 0x0d, 0xa2, 0xe0, 0xbb,
	0xbe, 0xed, 0xb0, 0xdb, 0xba, 0xeb, 0x18, 0x4d,
	0x42, 0x01, 0xff, 0xed, 0x9d, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x51, 0x9f, 0x81,
	0xbb, 0x93, 0xfd, 0x72, 0x9d, 0x9d, 0xe0, 0x60,
	0x80, 0xfa, 0x01, 0xe6, 0x34, 0x93, 0x22, 0xed,
	0x67, 0x69, 0x14, 0x52, 0xca, 0x95, 0xd1, 0x9b,
	0x77, 0xdb, 0xb8, 0x12, 0x80, 0xb0, 0xc4, 0xda,
	0x5c, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x7f,
	0x20, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x01, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
	0xff, 0xff, 0xff, 0x0e, 0x00, 0x00, 0x0b, 0x2f,
	0x50, 0x32, 0x53, 0x48, 0x2f, 0x62, 0x74, 0x63,
	0x64, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xff, 0xff, 0x01, 0x00, 0xf2, 0x05, 0x2a, 0x01,
	0x00, 0x00, 0x00, 0x01, 0x51, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00,
}

// regTestGenesisBlockBytes are the wire encoded bytes for the genesis block of
// the regression test network as of protocol version 60002.
var regTestGenesisBlockBytes = genesisBlockBytes

// testNet3GenesisBlockBytes are the wire encoded bytes for the genesis block of
// the test network (version 3) as of protocol version 60002.
var testNet3GenesisBlockBytes = genesisBlockBytes

// simNetGenesisBlockBytes are the wire encoded bytes for the genesis block of
// the simulation test network as of protocol version 70002.
var simNetGenesisBlockBytes = genesisBlockBytes