package flo

import (
	"github.com/martinboehm/btcd/wire"
	"github.com/martinboehm/btcutil/chaincfg"
	"spacecruft.org/spacecruft/blockbook/bchain"
	"spacecruft.org/spacecruft/blockbook/bchain/coins/btc"
)

// magic numbers
const (
	MainnetMagic wire.BitcoinNet = 0xf1a5c0fd
	TestnetMagic wire.BitcoinNet = 0xf25ac0fd
	RegtestMagic wire.BitcoinNet = 0xdab5bffa
)

// chain parameters
var (
	MainNetParams chaincfg.Params
	TestNetParams chaincfg.Params
)

func init() {
	MainNetParams = chaincfg.MainNetParams
	MainNetParams.Net = MainnetMagic
	MainNetParams.PubKeyHashAddrID = []byte{35}
	MainNetParams.ScriptHashAddrID = []byte{94}
	MainNetParams.Bech32HRPSegwit = "flo"

	TestNetParams = chaincfg.TestNet3Params
	TestNetParams.Net = TestnetMagic
	TestNetParams.PubKeyHashAddrID = []byte{115}
	TestNetParams.ScriptHashAddrID = []byte{198}
	TestNetParams.Bech32HRPSegwit = "tflo"
}

// FloParser handle
type FloParser struct {
	*btc.BitcoinParser
	baseparser *bchain.BaseParser
}

// NewFloParser returns new FloParser instance
func NewFloParser(params *chaincfg.Params, c *btc.Configuration) *FloParser {
	return &FloParser{
		BitcoinParser: btc.NewBitcoinParser(params, c),
		baseparser:    &bchain.BaseParser{},
	}
}

// GetChainParams contains network parameters for the main Flo network,
// and the test Flo network
func GetChainParams(chain string) *chaincfg.Params {
	if !chaincfg.IsRegistered(&MainNetParams) {
		err := chaincfg.Register(&MainNetParams)
		if err == nil {
			err = chaincfg.Register(&TestNetParams)
		}
		if err != nil {
			panic(err)
		}
	}
	switch chain {
	case "test":
		return &TestNetParams
	default:
		return &MainNetParams
	}
}

// PackTx packs transaction to byte array using protobuf
func (p *FloParser) PackTx(tx *bchain.Tx, height uint32, blockTime int64) ([]byte, error) {
	return p.baseparser.PackTx(tx, height, blockTime)
}

// UnpackTx unpacks transaction from protobuf byte array
func (p *FloParser) UnpackTx(buf []byte) (*bchain.Tx, uint32, error) {
	return p.baseparser.UnpackTx(buf)
}