package cmd

import (
	"flag"
	"log/slog"
	"os"

	"github.com/lmittmann/tint"
)

const (
	defaultRedisAddr     = "localhost:6379"
	defaultRedisPassword = ""
)

var (
	// Flags shared among CLI entrypoints
	Flags *flag.FlagSet

	RedisAddress  string
	RedisPassword string
	LogLevel      flagLevel

	logLevelVar slog.LevelVar
)

func init() {
	h := tint.NewHandler(os.Stderr, &tint.Options{Level: &logLevelVar})
	slog.SetDefault(slog.New(h))

	Flags = flag.NewFlagSet("blob-indexer", flag.ExitOnError)
	Flags.StringVar(&RedisAddress, "redis-addr", defaultRedisAddr, "Address of the Redis server")
	Flags.StringVar(&RedisPassword, "redis-password", defaultRedisPassword, "Password for the Redis server")
	Flags.Var(&LogLevel, "log-level", "Log level (default INFO)")
}

type flagLevel struct{ slog.Level }

func (fl *flagLevel) Set(value string) error {
	return fl.UnmarshalText([]byte(value))
}

func ParseFlags() {
	err := Flags.Parse(os.Args[1:])
	if err != nil {
		panic(err)
	}

	logLevelVar.Set(LogLevel.Level)
}