package xiaomi

import (
	"errors"
	"fmt"
)

// 封装层错误定义

var (
	// ErrNotSupported 设备不支持该操作
	ErrNotSupported = errors.New("xiaomi: operation not supported by this device")

	// ErrDeviceNotFound 设备不存在
	ErrDeviceNotFound = errors.New("xiaomi: device not found")

	// ErrHomeNotFound 家庭不存在
	ErrHomeNotFound = errors.New("xiaomi: home not found")

	// ErrRoomNotFound 房间不存在
	ErrRoomNotFound = errors.New("xiaomi: room not found")

	// ErrDeviceOffline 设备离线
	ErrDeviceOffline = errors.New("xiaomi: device is offline")

	// ErrNoSPEC 设备缺少 SPEC 信息
	ErrNoSPEC = errors.New("xiaomi: device has no SPEC information")

	// ErrInvalidProp 属性读取/写入失败
	ErrInvalidProp = errors.New("xiaomi: invalid property access")

	// ErrNotInitialized 客户端未初始化
	ErrNotInitialized = errors.New("xiaomi: client not initialized")
)

// ClientError 带上下文的客户端错误
type ClientError struct {
	Op  string // 操作名称
	DID string // 设备 ID
	Err error  // 底层错误
}

func (e *ClientError) Error() string {
	if e.DID != "" {
		return fmt.Sprintf("xiaomi: %s device=%s: %v", e.Op, e.DID, e.Err)
	}
	return fmt.Sprintf("xiaomi: %s: %v", e.Op, e.Err)
}

func (e *ClientError) Unwrap() error {
	return e.Err
}

// wrapErr 包装错误
func wrapErr(op, did string, err error) error {
	if err == nil {
		return nil
	}
	return &ClientError{Op: op, DID: did, Err: err}
}