// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
// See the file LICENSE for licensing terms.

package config

import (
	"encoding/json"
	"time"

	"github.com/luxfi/constants"
)

var DefaultExecutionConfig = ExecutionConfig{
	Network:                   DefaultNetworkConfig,
	BlockCacheSize:            64 * constants.MiB,
	TxCacheSize:               128 * constants.MiB,
	TransformedNetTxCacheSize: 4 * constants.MiB,
	RewardUTXOsCacheSize:      2048,
	ChainCacheSize:            2048,
	ChainDBCacheSize:          2048,
	BlockIDCacheSize:          8192,
	FxOwnerCacheSize:          4 * constants.MiB,
	ChecksumsEnabled:          false,
	MempoolPruneFrequency:     30 * time.Minute,
}

// ExecutionConfig provides execution parameters of PlatformVM
type ExecutionConfig struct {
	Network                   NetworkConfig `json:"network"`
	BlockCacheSize            int           `json:"block-cache-size"`
	TxCacheSize               int           `json:"tx-cache-size"`
	TransformedNetTxCacheSize int           `json:"transformed-chain-tx-cache-size"`
	RewardUTXOsCacheSize      int           `json:"reward-utxos-cache-size"`
	ChainCacheSize            int           `json:"chain-cache-size"`
	ChainDBCacheSize          int           `json:"chain-db-cache-size"`
	BlockIDCacheSize          int           `json:"block-id-cache-size"`
	FxOwnerCacheSize          int           `json:"fx-owner-cache-size"`
	ChecksumsEnabled          bool          `json:"checksums-enabled"`
	MempoolPruneFrequency     time.Duration `json:"mempool-prune-frequency"`
}

// GetExecutionConfig returns an ExecutionConfig
// input is unmarshalled into an ExecutionConfig previously
// initialized with default values
func GetExecutionConfig(b []byte) (*ExecutionConfig, error) {
	ec := DefaultExecutionConfig

	// if bytes are empty keep default values
	if len(b) == 0 {
		return &ec, nil
	}

	return &ec, json.Unmarshal(b, &ec)
}
