// +build json

package shadowsocks

import (
	"encoding/json"
  
  "github.com/v2ray/v2ray-core/common/log"
  "github.com/v2ray/v2ray-core/common/serial"
  "github.com/v2ray/v2ray-core/proxy/internal"
)

func (this *Config) UnmarshalJSON(data []byte) error {
	type JsonConfig struct {
		Cipher   *serial.StringLiteral `json:"method"`
		Password *serial.StringLiteral `json:"password"`
	}
	jsonConfig := new(JsonConfig)
	if err := json.Unmarshal(data, jsonConfig); err != nil {
		return err
	}
  if this.Password == nil {
    log.Error("Shadowsocks: Password is not specified.")
    return internal.ErrorBadConfiguration
  }
  this.Password = jsonConfig.Password.String()
  if this.Cipher == nil {
    log.Error("Shadowsocks: Cipher method is not specified.")
    return internal.ErrorBadConfiguration
  }
  jsonConfig.Cipher = jsonConfig.Cipher.ToLower()
  switch jsonConfig.Cipher.String() {
    case "aes-256-cfb":
    this.Cipher = &AesCfb {
      KeyBytes: 32
    }
    case "aes-128-cfb":
    this.Cipher = &AesCfb {
      KeyBytes: 32
    }
    default:
    log.Error("Shadowsocks: Unknown cipher method: ", jsonConfig.Cipher)
    return internal.ErrorBadConfiguration
  }
  return nil
}