package syn_notice

import (
	"context"
	"encoding/json"
)

var _ SynApiInterface = (*CmbToBBRequest)(nil)
var _ SynApiInterface = (*BBToWechatRequest)(nil)
var _ SynApiInterface = (*WechatToBBRequest)(nil)

type SynApiInterface interface {
	GetSynNotice() *SynNotice
}

type SynNotice struct {
	OutBizBo   string
	Type       SynNoticeType
	BizContent SynApiInterface
}

func (this *SynNotice) Marshal() ([]byte, error) {
	return json.Marshal(this)
}

// 上下文键类型，避免命名冲突
type contextKey string

const (
	contextCMBToBBKey contextKey = "cmb_to_bb"
	contextBBToWXKey  contextKey = "bb_to_wx"
)

// SynApi 无状态服务
type SynApi struct{}

// NewSynApi 创建无状态的处理实例
func NewSynApi() *SynApi {
	return &SynApi{}
}

// WithCmbTOBB 将 request 存入上下文
func (w *SynApi) WithCmbTOBB(ctx context.Context) context.Context {
	return context.WithValue(ctx, contextCMBToBBKey, &CmbToBBRequest{})
}

// GetCmbToBB 从上下文中获取 request
func (w *SynApi) GetCmbToBB(ctx context.Context) (*CmbToBBRequest, bool) {
	req, ok := ctx.Value(contextCMBToBBKey).(*CmbToBBRequest)
	return req, ok
}

// WithBBToWX 将 request 存入上下文
func (w *SynApi) WithBBToWX(ctx context.Context) context.Context {
	return context.WithValue(ctx, contextBBToWXKey, &BBToWechatRequest{})
}

// GetBBToWX 从上下文中获取 request
func (w *SynApi) GetBBToWX(ctx context.Context) (*BBToWechatRequest, bool) {
	req, ok := ctx.Value(contextBBToWXKey).(*BBToWechatRequest)
	return req, ok
}