// Package curl ...
//
// Author: go_developer@163.com<白茶清欢>
//
// Description:
//
// File: request.go
//
// Version: 1.0.0
//
// Date: 2022/05/01 21:25:03
package curl

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"strings"
	"time"

	"github.com/ddliu/go-httpclient"
)

// Request 发送请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:26:02
func Request(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = strings.ToUpper(apiConfig.Method)
	switch apiConfig.Method {
	case http.MethodGet:
		return GET(apiConfig, header, param)
	case http.MethodPost:
		return POST(apiConfig, header, param)
	case http.MethodPut:
		return PUT(apiConfig, header, param)
	case http.MethodDelete:
		return DELETE(apiConfig, header, param)
	case http.MethodConnect:
		return Connect(apiConfig, header, param)
	case http.MethodOptions:
		return OPTION(apiConfig, header, param)
	case http.MethodTrace:
		return Trace(apiConfig, header, param)
	case http.MethodPatch:
		return Patch(apiConfig, header, param)
	default:
		return &ApiResponse{
			RequestConfig:     apiConfig,
			Exception:         NewException(RequestMethodNotSupport, map[string]string{"method": apiConfig.Method}),
			Response:          nil,
			StartRequestTime:  time.Now().UnixNano(),
			FinishRequestTime: time.Now().UnixNano(),
		}
	}
}

// GET ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date: 2022/05/01 21:29:09
func GET(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodGet
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// POST post请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:31:36
func POST(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodPost
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// PUT put请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:31:52
func PUT(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodPut
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// DELETE delete请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:32:08
func DELETE(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodDelete
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// OPTION option请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:32:18
func OPTION(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodOptions
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// Patch patch请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:36:12
func Patch(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodPatch
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// Trace trace请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:36:24
func Trace(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodTrace
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// Connect connect请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022/05/01 21:36:39
func Connect(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) *ApiResponse {
	apiConfig.Method = http.MethodConnect
	buildRequestURLAndParam(apiConfig, header, param)
	return send(apiConfig, header)
}

// getHttpClient 获取httpclient实例
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:27 2022/5/1
func getHttpClient(apiConfig *ApiRequestConfig, header map[string]string) *httpclient.HttpClient {
	fullHeader := make(map[string]string)
	for name, val := range apiConfig.CommonHeader {
		fullHeader[name] = val
	}
	for name, val := range header {
		fullHeader[name] = val
	}
	if len(apiConfig.ContentType) == 0 {
		apiConfig.ContentType = ContentTypeDefault
	}
	fullHeader["content-type"] = apiConfig.ContentType
	return httpclient.NewHttpClient().WithHeaders(fullHeader).
		WithOption(httpclient.OPT_CONNECTTIMEOUT_MS, time.Duration(apiConfig.Timeout.Connect)*time.Millisecond).
		WithOption(httpclient.OPT_TIMEOUT, time.Duration(apiConfig.Timeout.Read)*time.Millisecond)
}

// buildRequestURLAndParam 构建完整请求URL与请求参数
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 21:55 2022/5/1
func buildRequestURLAndParam(apiConfig *ApiRequestConfig, header map[string]string, param map[string]interface{}) {
	apiConfig.Method = strings.ToUpper(apiConfig.Method)
	if apiConfig.Timeout.Connect == 0 {
		apiConfig.Timeout.Connect = DefaultConnectTimeout
	}
	if apiConfig.Timeout.Read == 0 {
		apiConfig.Timeout.Read = DefaultConnectTimeout
	}
	formatParam := make(map[string]interface{})
	for paramName, paramValue := range param {
		uriTemplate := "{" + paramName + "}"
		if strings.Contains(apiConfig.URI, uriTemplate) {
			apiConfig.URI = strings.ReplaceAll(apiConfig.URI, uriTemplate, fmt.Sprintf("%v", paramValue))
			continue
		}
		formatParam[paramName] = paramValue
	}
	apiConfig.Parameter = formatParam
	paramPair := make([]string, 0)
	switch apiConfig.Method {
	case http.MethodPost:
		apiConfig.Body, _ = json.Marshal(formatParam)
	default:
		for paramName, paramValue := range formatParam {
			paramPair = append(paramPair, fmt.Sprintf("%v=%v", paramName, paramValue))
		}
		if len(paramPair) > 0 {
			apiConfig.URI = apiConfig.URI + "?" + strings.Join(paramPair, "&")
		}
	}
	apiConfig.FullURL = strings.ReplaceAll(apiConfig.Domain+"/"+apiConfig.URI, "//", "/")
}

// send 发送请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 14:53 2022/5/2
func send(apiConfig *ApiRequestConfig, header map[string]string) *ApiResponse {
	var (
		client *httpclient.HttpClient
		err    error
	)

	response := &ApiResponse{
		RequestConfig:     apiConfig,
		Response:          nil,
		Exception:         nil,
		StartRequestTime:  time.Now().UnixNano(),
		FinishRequestTime: 0,
	}

	defer func() {
		response.FinishRequestTime = time.Now().UnixNano()
	}()

	client = getHttpClient(apiConfig, header)
	if response.Response, err = client.Do(apiConfig.Method, apiConfig.FullURL, nil, bytes.NewReader(apiConfig.Body)); nil != err {
		response.Exception = NewException(SendRequestError, map[string]string{"real_reason": err.Error()})
	}
	return response
}