package auth

import (
	"bytes"
	"fmt"
	"strings"

	"github.com/cosmos/cosmos-sdk/x/params"
)

// DefaultParamspace defines the default auth module parameter subspace
const DefaultParamspace = "auth"

// Default parameter values
const (
	DefaultMaxMemoCharacters      uint64 = 256
	DefaultTxSigLimit             uint64 = 7
	DefaultTxSizeCostPerByte      uint64 = 10
	DefaultSigVerifyCostED25519   uint64 = 590
	DefaultSigVerifyCostSecp256k1 uint64 = 1000
)

// Parameter keys
var (
	KeyMaxMemoCharacters      = []byte("MaxMemoCharacters")
	KeyTxSigLimit             = []byte("TxSigLimit")
	KeyTxSizeCostPerByte      = []byte("TxSizeCostPerByte")
	KeySigVerifyCostED25519   = []byte("SigVerifyCostED25519")
	KeySigVerifyCostSecp256k1 = []byte("SigVerifyCostSecp256k1")
)

var _ params.ParamSet = &Params{}

// Params defines the parameters for the auth module.
type Params struct {
	MaxMemoCharacters      uint64 `json:"max_memo_characters"`
	TxSigLimit             uint64 `json:"tx_sig_limit"`
	TxSizeCostPerByte      uint64 `json:"tx_size_cost_per_byte"`
	SigVerifyCostED25519   uint64 `json:"sig_verify_cost_ed25519"`
	SigVerifyCostSecp256k1 uint64 `json:"sig_verify_cost_secp256k1"`
}

// ParamKeyTable for auth module
func ParamKeyTable() params.KeyTable {
	return params.NewKeyTable().RegisterParamSet(&Params{})
}

// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
// pairs of auth module's parameters.
// nolint
func (p *Params) ParamSetPairs() params.ParamSetPairs {
	return params.ParamSetPairs{
		{KeyMaxMemoCharacters, &p.MaxMemoCharacters},
		{KeyTxSigLimit, &p.TxSigLimit},
		{KeyTxSizeCostPerByte, &p.TxSizeCostPerByte},
		{KeySigVerifyCostED25519, &p.SigVerifyCostED25519},
		{KeySigVerifyCostSecp256k1, &p.SigVerifyCostSecp256k1},
	}
}

// Equal returns a boolean determining if two Params types are identical.
func (p Params) Equal(p2 Params) bool {
	bz1 := msgCdc.MustMarshalBinaryLengthPrefixed(&p)
	bz2 := msgCdc.MustMarshalBinaryLengthPrefixed(&p2)
	return bytes.Equal(bz1, bz2)
}

// DefaultParams returns a default set of parameters.
func DefaultParams() Params {
	return Params{
		MaxMemoCharacters:      DefaultMaxMemoCharacters,
		TxSigLimit:             DefaultTxSigLimit,
		TxSizeCostPerByte:      DefaultTxSizeCostPerByte,
		SigVerifyCostED25519:   DefaultSigVerifyCostED25519,
		SigVerifyCostSecp256k1: DefaultSigVerifyCostSecp256k1,
	}
}

// String implements the stringer interface.
func (p Params) String() string {
	var sb strings.Builder
	sb.WriteString("Params: \n")
	sb.WriteString(fmt.Sprintf("MaxMemoCharacters: %d\n", p.MaxMemoCharacters))
	sb.WriteString(fmt.Sprintf("TxSigLimit: %d\n", p.TxSigLimit))
	sb.WriteString(fmt.Sprintf("TxSizeCostPerByte: %d\n", p.TxSizeCostPerByte))
	sb.WriteString(fmt.Sprintf("SigVerifyCostED25519: %d\n", p.SigVerifyCostED25519))
	sb.WriteString(fmt.Sprintf("SigVerifyCostSecp256k1: %d\n", p.SigVerifyCostSecp256k1))
	return sb.String()
}