package main

import (
	"encoding/json"
	"os"
)

type Config struct {
	NodeID                []byte  `json:"nodeID"`
	Name                  string  `json:"name"`
	ShortName             string  `json:"shortName"`
	DefaultHops           uint32  `json:"defaultHops"`
	MaxHops               uint32  `json:"maxHops"`
	NodeBroadcastInterval float64 `json:"nodeBroadcastInterval"`
	X25519Key             []byte  `json:"x25519Key"`
	Channels              []struct {
		Name string `json:"name"`
		PSK  []byte `json:"psk"`
	} `json:"channels"`
	Position struct {
		BroadcastInterval float64 `json:"broadcastInterval"`
		Latitude          float64 `json:"latitude"`
		Longitude         float64 `json:"longitude"`
		Altitude          float64 `json:"altitude"`
	} `json:"position"`
	DeviceMetrics struct {
		BroadcastInterval float64 `json:"broadcastInterval"`
		UPSAddress        string  `json:"upsAddress"`
	} `json:"deviceMetrics"`
	KavaModem struct {
		Address string `json:"address"`
	} `json:"kavaModem"`
	MqttIf struct {
		Address  string `json:"address"`
		Username string `json:"username"`
		Password string `json:"password"`
		ClientID string `json:"clientId"`
		Root     string `json:"root"`
	} `json:"mqttIf"`
}

func ReadConfig(filename string) (*Config, error) {
	cfg := Config{}
	f, err := os.Open(filename)
	if err != nil {
		return nil, err
	}
	dec := json.NewDecoder(f)
	if err := dec.Decode(&cfg); err != nil {
		return nil, err
	}
	return &cfg, nil
}