// Package httpclient ...
//
// Description : httpclient ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2024-05-31 14:59
package httpclient

import (
	"errors"
	"fmt"
	"git.zhangdeman.cn/zhangdeman/consts"
	"git.zhangdeman.cn/zhangdeman/network/httpclient/define"
	requestBoodyWriter "git.zhangdeman.cn/zhangdeman/network/httpclient/implement/request"
	"git.zhangdeman.cn/zhangdeman/wrapper"
	"net/http"
	"net/textproto"
	"resty.dev/v3"
	"strings"
)

// 初始化请求配置, 包括:
// 1. 初始化空指针
// 2. 合并static参数
// 3. 使用 textproto.CanonicalMIMEHeaderKey 统一格式化header key
func initRequestConfig(reqConfig *define.Request) {
	if nil == reqConfig.Header {
		reqConfig.Header = map[string]any{}
	}
	if nil == reqConfig.Body {
		reqConfig.Body = map[string]any{}
	}
	if nil == reqConfig.Cookie {
		reqConfig.Cookie = map[string]any{}
	}
	if reqConfig.Query == nil {
		reqConfig.Query = map[string]any{}
	}
	if reqConfig.PathParam == nil {
		reqConfig.PathParam = map[string]string{}
	}

	// 合并静态参数, 传入参数与静态参数存在相同参数, 以静态参数为准
	for loc, paramTable := range reqConfig.Static {
		switch strings.ToUpper(loc) {
		case consts.RequestDataLocationBody.String():
			for name, val := range paramTable {
				reqConfig.Body[name] = val
			}
		case consts.RequestDataLocationQuery.String():
			for name, val := range paramTable {
				reqConfig.Query[name] = val
			}
		case consts.RequestDataLocationCookie.String():
			for name, val := range paramTable {
				reqConfig.Cookie[name] = val
			}
		case consts.RequestDataLocationHeader.String():
			for name, val := range paramTable {
				reqConfig.Header[name] = val
			}
		case consts.RequestDataLocationUriPath.String():
			for name, val := range paramTable {
				reqConfig.PathParam[name] = fmt.Sprintf("%v", val)
			}
		}
	}

	formatHeader(reqConfig)
}

// NewRestyClient 获取resty client
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 15:00 2024/5/31
func NewRestyClient(reqConfig *define.Request, reqOption *RequestOption) (*resty.Client, *resty.Request, error) {
	client := resty.New()
	request := client.R()
	if nil == reqConfig {
		return nil, nil, errors.New("request config is nil")
	}
	// 限流处理, 增加限流中间件
	client.AddRequestMiddleware(func(client *resty.Client, request *resty.Request) error {
		if nil != reqOption && nil != reqOption.RateLimiter {
			// 未配置流控
			return nil
		}
		if !reqOption.RateLimiter.Allow() {
			// 命中流控
			return define.ErrRateLimitExceeded
		}
		return nil
	})

	initRequestConfig(reqConfig)             // 初始化 + 格式化配置
	client.SetAllowMethodGetPayload(true)    // 配置 GET 请求允许带 Body
	client.SetAllowMethodDeletePayload(true) // 配置 DELETE 请求允许带 Body
	client.SetJSONEscapeHTML(true)           // 处理html实体字符

	request.SetPathParams(reqConfig.PathParam) // 设置path中的参数
	query := map[string]string{}
	for queryName, queryValue := range reqConfig.Query {
		if nil == queryValue {
			continue
		}
		query[queryName] = wrapper.AnyDataType(queryValue).ToString().Value()
	}
	request.SetQueryParams(query) // 设置query参数
	header := map[string]string{}
	for headerName, headerValue := range reqConfig.Header {
		if nil == headerValue {
			continue
		}
		header[headerName] = wrapper.AnyDataType(headerValue).ToString().Value()
	}
	request.SetHeaders(header)      // 设置header
	request.URL = reqConfig.FullUrl // 请求接口
	// 设置url参数, url path格式需要是 /user/{user_id}/detail格式, {user_id} 会自动替换
	request.SetPathParams(reqConfig.PathParam)
	request.Method = reqConfig.Method // 请求方法
	cookieList := make([]*http.Cookie, 0)
	for cookieName, cookieValue := range reqConfig.Cookie {
		if nil == cookieValue {
			continue
		}
		cookieList = append(cookieList, &http.Cookie{
			Name:  cookieName,
			Value: wrapper.AnyDataType(cookieValue).ToString().Value(),
		})
	}
	request.SetCookies(cookieList) // 设置cookie
	if err := setRestyBody(reqConfig, reqOption, request); nil != err {
		return nil, nil, err
	}
	return client, request, nil
}

// setRestyBody 设置请求BODY
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:18 2024/5/31
func setRestyBody(reqConfig *define.Request, requestOption *RequestOption, request *resty.Request) error {
	if nil == reqConfig.Body {
		return nil
	}
	if nil != requestOption && nil != requestOption.RequestBodyWrite {
		// 外部传入的实现
		requestOption.RequestBodyWrite.Write(request, reqConfig.Body)
		return nil
	}
	// 外部没传入, 使用内置实现, 内置默认实现支持: xml/json/form, 如需其他, 自行扩展
	return requestBoodyWriter.WriteBody(reqConfig.ContentType, request, reqConfig.Body)
}

// formatHeader 格式化header
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 15:18 2024/5/31
func formatHeader(requestConfig *define.Request) {
	if nil == requestConfig {
		return
	}
	formatHeaderData := make(map[string]any)
	for headerName, headerVal := range requestConfig.Header {
		// 规范化处理 header 名称
		formatHeaderData[textproto.CanonicalMIMEHeaderKey(headerName)] = headerVal
	}
	requestConfig.Header = formatHeaderData
}