package wechat

import (
	"bytes"
	"encoding/json"
	"encoding/xml"
	"errors"

	"git.chuangxin1.com/cx/myth"
)

func checkJSONError(msg myth.HTTPMessage) (jq *myth.JSONQuery, err error) {
	if msg.StatusCode == 200 {
		jq, err = msg.JSONQuery()
		if err != nil {
			return
		}
		code := int(0)
		code, err = jq.Int(`errcode`)
		if code == ErrReqOk {
			err = nil
			return
		}
		if err == nil {
			var msg string
			msg, err = jq.String("errmsg")
			if err != nil {
				return
			}
			err = errors.New(msg)
		}
	} else {
		err = errors.New(`HTTP StatusCode not 200`)
	}
	return
}

// getJSON 获取 JSON 格式返回数据
func getJSON(uri string) (jq *myth.JSONQuery, err error) {
	var msg myth.HTTPMessage

	headers := make(map[string]string)
	headers["Accept-Encoding"] = "gzip, deflate, br"
	headers["Accept"] = "application/json"
	if msg, err = myth.Get(uri, "", "", headers); err != nil {
		return
	}
	jq, err = checkJSONError(msg)
	return
}

// getBody 获取原始返回数据
func getBody(uri string) (msg myth.HTTPMessage, err error) {
	headers := make(map[string]string)
	headers["Accept-Encoding"] = "gzip, deflate, br"

	msg, err = myth.Get(uri, "", "", headers)
	if err != nil {
		return
	}
	if msg.StatusCode == 200 {
		jq := &myth.JSONQuery{}
		jq, err = msg.JSONQuery()
		if err != nil {
			return
		}
		code := int(0)
		code, err = jq.Int(`errcode`)
		if code == ErrReqOk {
			err = nil
			return
		}
		if err == nil {
			var errmsg string
			errmsg, err = jq.String("errmsg")
			if err != nil {
				return
			}
			err = errors.New(errmsg)
		}
	} else {
		err = errors.New(`HTTP StatusCode not 200`)
	}
	return
}

func postJSON(url string, args interface{}) (msg myth.HTTPMessage, err error) {
	headers := make(map[string]string)

	headers["Accept-Encoding"] = "gzip, deflate, br"
	headers["Content-Type"] = "application/json; charset=utf-8"

	var data []byte
	data, err = json.Marshal(args)
	if err != nil {
		return
	}
	msg, err = myth.Post(url, "", "", headers, bytes.NewReader(data))

	return
}

func postXML(url string, args interface{}) (msg myth.HTTPMessage, err error) {
	headers := make(map[string]string)

	headers["Accept-Encoding"] = "gzip, deflate, br"
	headers["Content-Type"] = "application/xml; charset=utf-8"

	var data []byte
	data, err = xml.Marshal(args)
	if err != nil {
		return
	}
	msg, err = myth.Post(url, "", "", headers, bytes.NewReader(data))

	return
}