package main

import (
	"fmt"

	"git.sr.ht/~emersion/go-scfg"
)

type config struct {
	HTTPAddress string
	LogLevel    string
	Topic       string
}

func readConfig(path string) (*config, error) {
	cfg, err := scfg.Load(path)
	if err != nil {
		return nil, err
	}

	config := new(config)
	// Set default values
	config.HTTPAddress = "127.0.0.1:8080"
	config.LogLevel = "info"

	d := cfg.Get("log-level")
	if d != nil {
		if err := d.ParseParams(&config.LogLevel); err != nil {
			return nil, err
		}
	}

	d = cfg.Get("http-address")
	if d != nil {
		if err := d.ParseParams(&config.HTTPAddress); err != nil {
			return nil, err
		}
	}

	d = cfg.Get("topic")
	if d == nil {
		return nil, fmt.Errorf("%q missing from config", "topic")
	}
	if err := d.ParseParams(&config.Topic); err != nil {
		return nil, err
	}

	return config, nil
}