package main

import (
	"encoding/json"
	"os"
)

type config struct {
	DSN   string `json:"dsn"`
	Topic string `json:"topic"`
}

func parseEnvConfig() (cfg config) {
	const defaultPath = "./cli.json"

	data, err := os.ReadFile(defaultPath)
	if err != nil {
		if !os.IsNotExist(err) {
			panic(err.Error())
		}
	} else {
		err := json.Unmarshal(data, &cfg)
		if err != nil {
			panic(err.Error())
		}
	}

	if dsn := os.Getenv("SMTH_DSN"); dsn != "" {
		cfg.DSN = dsn
	}

	if topic := os.Getenv("SMTH_TOPIC"); topic != "" {
		cfg.Topic = topic
	}

	return cfg
}