// Copyright (c) 2013-2014 The btcsuite developers
// Copyright (c) 2015 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.

package main

import (
	"github.com/decred/dcrd/chaincfg"
	"github.com/decred/dcrd/wire"
)

// activeNetParams is a pointer to the parameters specific to the
// currently active decred network.
var activeNetParams = &mainNetParams

// params is used to group parameters for various networks such as the main
// network and test networks.
type params struct {
	*chaincfg.Params
	rpcPort  string
	dnsSeeds []string
}

// mainNetParams contains parameters specific to the main network
// (wire.MainNet).  NOTE: The RPC port is intentionally different than the
// reference implementation because dcrd does not handle wallet requests.  The
// separate wallet process listens on the well-known port and forwards requests
// it does not handle on to dcrd.  This approach allows the wallet process
// to emulate the full reference implementation RPC API.
var mainNetParams = params{
	Params:  &chaincfg.MainNetParams,
	rpcPort: "9109",
	dnsSeeds: []string{
		"mainnet-seed.decred.mindcry.org",
		"mainnet-seed.decred.netpurgatory.com",
		"mainnet.decredseed.org",
		"mainnet-seed.decred.org",
	},
}

// testNetParams contains parameters specific to the test network (version 0)
// (wire.TestNet).  NOTE: The RPC port is intentionally different than the
// reference implementation - see the mainNetParams comment for details.
var testNetParams = params{
	Params:  &chaincfg.TestNetParams,
	rpcPort: "19109",
	dnsSeeds: []string{
		"testnet-seed.decred.mindcry.org",
		"testnet-seed.decred.netpurgatory.org",
		"testnet.decredseed.org",
		"testnet-seed.decred.org",
	},
}

// simNetParams contains parameters specific to the simulation test network
// (wire.SimNet).
var simNetParams = params{
	Params:   &chaincfg.SimNetParams,
	rpcPort:  "19556",
	dnsSeeds: []string{}, // NOTE: There must NOT be any seeds.
}

// netName returns the name used when referring to a decred network.  At the
// time of writing, dcrd currently places blocks for testnet version 0 in the
// data and log directory "testnet", which does not match the Name field of the
// chaincfg parameters.  This function can be used to override this directory name
// as "testnet" when the passed active network matches wire.TestNet.
//
// A proper upgrade to move the data and log directories for this network to
// "testnet" is planned for the future, at which point this function can be
// removed and the network parameter's name used instead.
func netName(chainParams *params) string {
	switch chainParams.Net {
	case wire.TestNet:
		return "testnet"
	default:
		return chainParams.Name
	}
}