package flags

import (
	"fmt"

	"github.com/urfave/cli/v2"

	opservice "github.com/ethereum-optimism/optimism/op-service"
	oplog "github.com/ethereum-optimism/optimism/op-service/log"
	opmetrics "github.com/ethereum-optimism/optimism/op-service/metrics"
	oppprof "github.com/ethereum-optimism/optimism/op-service/pprof"
	oprpc "github.com/ethereum-optimism/optimism/op-service/rpc"
	txmgr "github.com/ethereum-optimism/optimism/op-service/txmgr"
)

const envVarPrefix = "OP_CHALLENGER"

func prefixEnvVars(name string) []string {
	return opservice.PrefixEnvVar(envVarPrefix, name)
}

var (
	// Required Flags
	L1EthRpcFlag = &cli.StringFlag{
		Name:    "l1-eth-rpc",
		Usage:   "HTTP provider URL for L1.",
		EnvVars: prefixEnvVars("L1_ETH_RPC"),
	}
	RollupRpcFlag = &cli.StringFlag{
		Name:    "rollup-rpc",
		Usage:   "HTTP provider URL for the rollup node.",
		EnvVars: prefixEnvVars("ROLLUP_RPC"),
	}
	L2OOAddressFlag = &cli.StringFlag{
		Name:    "l2oo-address",
		Usage:   "Address of the L2OutputOracle contract.",
		EnvVars: prefixEnvVars("L2OO_ADDRESS"),
	}
	DGFAddressFlag = &cli.StringFlag{
		Name:    "dgf-address",
		Usage:   "Address of the DisputeGameFactory contract.",
		EnvVars: prefixEnvVars("DGF_ADDRESS"),
	}
)

// requiredFlags are checked by [CheckRequired]
var requiredFlags = []cli.Flag{
	L1EthRpcFlag,
	RollupRpcFlag,
	L2OOAddressFlag,
	DGFAddressFlag,
}

// optionalFlags is a list of unchecked cli flags
var optionalFlags = []cli.Flag{}

func init() {
	optionalFlags = append(optionalFlags, oprpc.CLIFlags(envVarPrefix)...)
	optionalFlags = append(optionalFlags, oplog.CLIFlags(envVarPrefix)...)
	optionalFlags = append(optionalFlags, opmetrics.CLIFlags(envVarPrefix)...)
	optionalFlags = append(optionalFlags, oppprof.CLIFlags(envVarPrefix)...)
	optionalFlags = append(optionalFlags, txmgr.CLIFlags(envVarPrefix)...)

	Flags = append(requiredFlags, optionalFlags...)
}

// Flags contains the list of configuration options available to the binary.
var Flags []cli.Flag

func CheckRequired(ctx *cli.Context) error {
	for _, f := range requiredFlags {
		if !ctx.IsSet(f.Names()[0]) {
			return fmt.Errorf("flag %s is required", f.Names()[0])
		}
	}
	return nil
}
