package params

import (
	"encoding/binary"
	"math/big"

	"github.com/ethereum/go-ethereum/common"
)

// To make taiko-geth compatible with the op-service library, we need to define the following constants and functions.
type ProtocolVersion [32]byte
type ProtocolVersionComparison int

func (p ProtocolVersion) String() string {
	return ""
}

func (p ProtocolVersion) Compare(other ProtocolVersion) (cmp ProtocolVersionComparison) {
	return 0
}

type ProtocolVersionV0 struct {
	Build                           [8]byte
	Major, Minor, Patch, PreRelease uint32
}

func (v ProtocolVersionV0) Encode() (out ProtocolVersion) {
	copy(out[8:16], v.Build[:])
	binary.BigEndian.PutUint32(out[16:20], v.Major)
	binary.BigEndian.PutUint32(out[20:24], v.Minor)
	binary.BigEndian.PutUint32(out[24:28], v.Patch)
	binary.BigEndian.PutUint32(out[28:32], v.PreRelease)
	return
}

func u64(val uint64) *uint64 { return &val }

// Network IDs
var (
	TaikoMainnetNetworkID     = big.NewInt(167000)
	TaikoInternalL2ANetworkID = big.NewInt(167001)
	TaikoInternalL2BNetworkID = big.NewInt(167002)
	SnaefellsjokullNetworkID  = big.NewInt(167003)
	AskjaNetworkID            = big.NewInt(167004)
	GrimsvotnNetworkID        = big.NewInt(167005)
	EldfellNetworkID          = big.NewInt(167006)
	JolnirNetworkID           = big.NewInt(167007)
	KatlaNetworkID            = big.NewInt(167008)
	HeklaNetworkID            = big.NewInt(167009)
	PreconfDevnetNetworkID    = big.NewInt(167010)
	MasayaDevnetNetworkID     = big.NewInt(167011)
)

var networkIDToChainConfig = map[*big.Int]*ChainConfig{
	TaikoMainnetNetworkID:      TaikoChainConfig,
	TaikoInternalL2ANetworkID:  TaikoChainConfig,
	TaikoInternalL2BNetworkID:  TaikoChainConfig,
	SnaefellsjokullNetworkID:   TaikoChainConfig,
	AskjaNetworkID:             TaikoChainConfig,
	GrimsvotnNetworkID:         TaikoChainConfig,
	EldfellNetworkID:           TaikoChainConfig,
	JolnirNetworkID:            TaikoChainConfig,
	KatlaNetworkID:             TaikoChainConfig,
	HeklaNetworkID:             TaikoChainConfig,
	PreconfDevnetNetworkID:     TaikoChainConfig,
	MasayaDevnetNetworkID:      TaikoChainConfig,
	MainnetChainConfig.ChainID: MainnetChainConfig,
	SepoliaChainConfig.ChainID: SepoliaChainConfig,
	TestChainConfig.ChainID:    TestChainConfig,
	NonActivatedConfig.ChainID: NonActivatedConfig,
}

func NetworkIDToChainConfigOrDefault(networkID *big.Int) *ChainConfig {
	if config, ok := networkIDToChainConfig[networkID]; ok {
		return config
	}

	return AllEthashProtocolChanges
}

var TaikoChainConfig = &ChainConfig{
	ChainID:                 TaikoInternalL2ANetworkID, // Use Internal Devnet network ID by default.
	HomesteadBlock:          common.Big0,
	EIP150Block:             common.Big0,
	EIP155Block:             common.Big0,
	EIP158Block:             common.Big0,
	ByzantiumBlock:          common.Big0,
	ConstantinopleBlock:     common.Big0,
	PetersburgBlock:         common.Big0,
	IstanbulBlock:           common.Big0,
	BerlinBlock:             common.Big0,
	LondonBlock:             common.Big0,
	ShanghaiTime:            u64(0),
	MergeNetsplitBlock:      nil,
	TerminalTotalDifficulty: common.Big0,
	Taiko:                   true,
}