package lnutils

import (

"log/slog"

"strings"

"github.com/btcsuite/btcd/btcec/v2"

"github.com/btcsuite/btclog/v2"

"github.com/davecgh/go-spew/spew"

)

// LogClosure is used to provide a closure over expensive logging operations so

// don't have to be performed when the logging level doesn't warrant it.

type LogClosure func() string

// String invokes the underlying function and returns the result.

func (c LogClosure) String() string {

return c()

}

// NewLogClosure returns a new closure over a function that returns a string

// which itself provides a Stringer interface so that it can be used with the

// logging system.

func NewLogClosure(c func() string) LogClosure {

return LogClosure(c)

}

// SpewLogClosure takes an interface and returns the string of it created from

// `spew.Sdump` in a LogClosure.

func SpewLogClosure(a any) LogClosure {

return func() string {

return spew.Sdump(a)

}

}

// NewSeparatorClosure returns a new closure that logs a separator line.

func NewSeparatorClosure() LogClosure {

return func() string {

return strings.Repeat("=", 80)

}

}

// LogPubKey returns a slog attribute for logging a public key in hex format.

func LogPubKey(key string, pubKey *btcec.PublicKey) slog.Attr {

// Handle nil pubkey gracefully, although callers should ideally prevent

// this.

if pubKey == nil {

return btclog.Fmt(key, "<nil>")

}

return btclog.Hex6(key, pubKey.SerializeCompressed())

}