package config

import (
  "gopkg.in/yaml.v2"
  "io"
  "bytes"
  "github.com/imdario/mergo"
)

type Config struct {
  XMPP XMPPConfig `yaml:"xmpp,omitempty"`
}

type XMPPConfig struct {
  Address string
  Jid string
  Credential string
  Insecure bool
  MUCs []string
}

func Load(r io.Reader) (c Config, err error) {
  buf := new(bytes.Buffer)
  buf.ReadFrom(r)

  if err = yaml.Unmarshal(buf.Bytes(), &c); err != nil {
    return
  }

  mergo.Merge(&c, Config{
    XMPP: XMPPConfig{
      Address: "localhost:5222",
      Jid: "user@localhost",
      Credential: "password",
      Insecure: true,
    },
  })

  return
}

func Save(w io.Writer, c Config) (err error) {
  out, err := yaml.Marshal(c)
  if err != nil {
    return
  }
  _, err = w.Write(out)
  return
}