package meituan_union

import (
	"fmt"
	"sort"
	"strings"

	"github.com/zeromicro/go-zero/core/logx"

	"gitee.com/chengdu-lenntc/third-platform-sdk/client"
	"gitee.com/chengdu-lenntc/third-platform-sdk/util"
)

// MeituanUnionApi 美团联盟平台的api
type MeituanUnionApi interface {
	// Sign 签名
	Sign(params map[string]interface{}) string
	// NotifySign 通知签名
	NotifySign(params map[string]interface{}) string
	// GetLink 获取推广链接
	GetLink(params GenerateLinkRequest) (*GenerateLinkResponse, error)
	// MiniCode 获取小程序码
	MiniCode(params MiniCodeRequest) (*MimiCodeResponse, error)
	// GetOrderBySinge 获取单个订单
	GetOrderBySinge(params GetOrderBySingeRequest) (*GetOrderBySingeResponse, error)
	// GetOrderByBatch 批量获取订单
	GetOrderByBatch(params GetOrderByBatchRequest) (*GetOrderByBatchResponse, error)
}

type meituanUnionApiImpl struct {
	log    logx.Logger
	client *Client
}

func newMeituanUnionApiImpl(log logx.Logger, client *Client) MeituanUnionApi {
	return &meituanUnionApiImpl{
		log:    log,
		client: client,
	}
}

// Sign 签名
func (a *meituanUnionApiImpl) Sign(params map[string]interface{}) string {
	kvPairs := a.getSignStr(params)
	sort.Strings(kvPairs)
	paramStr := strings.Join(kvPairs, "")
	return util.Md5String(a.client.authConfig.SignKey + paramStr + a.client.authConfig.SignKey)
}

// NotifySign 通知签名
func (a *meituanUnionApiImpl) NotifySign(params map[string]interface{}) string {
	kvPairs := a.getSignStr(params)
	sort.Strings(kvPairs)
	paramStr := strings.Join(kvPairs, "")
	return util.Md5String(a.client.authConfig.NotifyKey + paramStr + a.client.authConfig.NotifyKey)
}

// GetLink 获取推广链接
func (a *meituanUnionApiImpl) GetLink(params GenerateLinkRequest) (*GenerateLinkResponse, error) {
	params.Sign = a.Sign(util.StructToMap(params))
	queryArgs := util.StructToMap(params)
	req := &client.HttpRequest{Headers: a.client.Headers, QueryArgs: queryArgs}
	response := new(GenerateLinkResponse)
	if err := a.client.HttpGet(GetLinkUrl, req, &client.HttpResponse{Result: response}); err != nil {
		return nil, err
	}
	return response, nil
}

// MiniCode 获取小程序码
func (a *meituanUnionApiImpl) MiniCode(params MiniCodeRequest) (*MimiCodeResponse, error) {
	params.Sign = a.Sign(util.StructToMap(params))
	queryArgs := util.StructToMap(params)
	req := &client.HttpRequest{Headers: a.client.Headers, QueryArgs: queryArgs}
	response := new(MimiCodeResponse)
	if err := a.client.HttpGet(GetMiniCode, req, &client.HttpResponse{Result: response}); err != nil {
		return nil, err
	}
	return response, nil
}

// GetOrderBySinge 获取单个订单
func (a *meituanUnionApiImpl) GetOrderBySinge(params GetOrderBySingeRequest) (*GetOrderBySingeResponse, error) {
	params.Sign = a.Sign(util.StructToMap(params))
	queryArgs := util.StructToMap(params)
	req := &client.HttpRequest{Headers: a.client.Headers, QueryArgs: queryArgs}
	response := new(GetOrderBySingeResponse)
	if err := a.client.HttpGet(GetOrderSinge, req, &client.HttpResponse{Result: response}); err != nil {
		return nil, err
	}
	return response, nil
}

// GetOrderByBatch 批量获取订单
func (a *meituanUnionApiImpl) GetOrderByBatch(params GetOrderByBatchRequest) (*GetOrderByBatchResponse, error) {
	params.Sign = a.Sign(util.StructToMap(params))
	queryArgs := util.StructToMap(params)
	req := &client.HttpRequest{Headers: a.client.Headers, QueryArgs: queryArgs}
	response := new(GetOrderByBatchResponse)
	if err := a.client.HttpGet(GetOrderBatch, req, &client.HttpResponse{Result: response}); err != nil {
		return nil, err
	}
	return response, nil
}

func (a *meituanUnionApiImpl) getSignStr(dataMap map[string]any) []string {
	var kvPairs []string
	for k, v := range dataMap {
		key := a.lowerFirstLetter(k)
		if key == "sign" || key == "Sign" {
			continue
		}
		kvPairs = append(kvPairs, fmt.Sprintf("%s%v", key, v))
	}
	return kvPairs
}

func (a *meituanUnionApiImpl) lowerFirstLetter(s string) string {
	if len(s) == 0 {
		return s
	}
	return strings.ToLower(string(s[0])) + s[1:]
}