package types

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
)

type Config struct {
	DeviceID           string        `json:"device_id"`
	Remotes            []*Remote     `json:"remotes"`
	TemperatureSensors []*WireSensor `json:"temperature_sensors"`
}

func (c *Config) ToJSON() (string, error) {
	var b bytes.Buffer
	err := c.JSONWriter(&b)
	if err != nil {
		return "", err
	}

	return b.String(), nil
}

// JSONWriter needs a writer to write the struct into json string
func (c *Config) JSONWriter(w io.Writer) error {
	encoder := json.NewEncoder(w)
	encoder.SetIndent("", "  ")
	err := encoder.Encode(&c)
	if err != nil {
		return fmt.Errorf("Error in encoding struct to json: %v", err)
	}
	return nil
}

// JSONDecoder decode a json string from a reader into a struct
func (c *Config) JSONDecoder(r io.Reader) error {
	jsonDecoder := json.NewDecoder(r)
	if err := jsonDecoder.Decode(&c); err != nil {
		return fmt.Errorf("Can not unmarshal JSON: %v", err)
	}
	return nil
}

type Remote struct {
	Name       string `json:"remote_name"`
	Address    string `json:"remote_address"`
	Registered bool   `json:"remote_registered"`
}

type WireSensor struct {
	ID       string `json:"sensor_id"`
	Name     string `json:"sensor_name"`
	WirePath string `json:"wire_path"`
}