// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

// Contains all the wrappers from the core package.

package geth

import (
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/params"
)

// MainnetChainConfig returns the chain configurations for the main Ethereum network.
func MainnetChainConfig() *ChainConfig {
	return &ChainConfig{
		HomesteadBlock:           params.MainNetHomesteadBlock.Int64(),
		DAOForkBlock:             params.MainNetDAOForkBlock.Int64(),
		DAOForkSupport:           true,
		HomesteadGasRepriceBlock: params.MainNetHomesteadGasRepriceBlock.Int64(),
		HomesteadGasRepriceHash:  Hash{params.MainNetHomesteadGasRepriceHash},
	}
}

// MainnetGenesis returns the JSON spec to use for the main Ethereum network. It
// is actually empty since that defaults to the hard coded binary genesis block.
func MainnetGenesis() string {
	return ""
}

// TestnetChainConfig returns the chain configurations for the Ethereum test network.
func TestnetChainConfig() *ChainConfig {
	return &ChainConfig{
		HomesteadBlock:           params.TestNetHomesteadBlock.Int64(),
		DAOForkBlock:             0,
		DAOForkSupport:           false,
		HomesteadGasRepriceBlock: params.TestNetHomesteadGasRepriceBlock.Int64(),
		HomesteadGasRepriceHash:  Hash{params.TestNetHomesteadGasRepriceHash},
	}
}

// TestnetGenesis returns the JSON spec to use for the Ethereum test network.
func TestnetGenesis() string {
	return core.TestNetGenesisBlock()
}

// ChainConfig is the core config which determines the blockchain settings.
type ChainConfig struct {
	HomesteadBlock           int64 // Homestead switch block
	DAOForkBlock             int64 // TheDAO hard-fork switch block
	DAOForkSupport           bool  // Whether the nodes supports or opposes the DAO hard-fork
	HomesteadGasRepriceBlock int64 // Homestead gas reprice switch block
	HomesteadGasRepriceHash  Hash  // Homestead gas reprice switch block hash
}

// NewChainConfig creates a new chain configuration that transitions immediately
// to homestead and has no notion of the DAO fork (ideal for a private network).
func NewChainConfig() *ChainConfig {
	return new(ChainConfig)
}