//
// Created by xajhu on 2019/11/18 0018.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>

#include "common.h"
#include "err_code.h"
#include "log.h"
#include "../include/restful.h"

#define SSL_CA_FILE                 ("/etc/ssl/certs/ca-certificates.crt")

typedef struct {
    char *pReqUrl;
    char sPath[MAX_PATH];
    char sDlPath[MAX_PATH];
    unsigned int reqResult[4096];
    unsigned int dlSize;
    OnHttpResponse onRspCb;
    CURL *pCurl;
    int errCode;
} HTTP_REQ_PARAMS, *PHTTP_REQ_PARAMS;

static size_t __writeDataCb(void *pData, size_t size, size_t nmemb, void *pParams)
{
    PHTTP_REQ_PARAMS pReq = (PHTTP_REQ_PARAMS)pParams;
    size_t iMemSize = size * nmemb;

    memcpy(pReq->reqResult + pReq->dlSize, pData, iMemSize);
    pReq->dlSize += iMemSize;

    return (iMemSize);
}

int http_post_request(const char *pURL, const char *pPost, OnHttpResponse onRespCb)
{
    int value = 1;
    CURL *pCurl = NULL;
    int ret = 0;
    struct curl_slist *pList;
    PHTTP_REQ_PARAMS pParams = NULL;

    pParams = (PHTTP_REQ_PARAMS)malloc(sizeof(HTTP_REQ_PARAMS));

    if(pParams == NULL) {
        LOG_EX(LOG_Error, "Malloc %u memory error\n", sizeof(HTTP_REQ_PARAMS));
        return -ERR_NOMEM;
    }

    ret = curl_global_init(CURL_GLOBAL_ALL);

    if(ret != CURLE_OK) {
        LOG_EX(LOG_Error, "Init curl global error: %d\n", ret);
        free(pParams);
        return -ERR_ERR;
    }

    pCurl = curl_easy_init();

    if(!pCurl) {
        LOG_EX(LOG_Error, "Init easy curl error: %d\n", ret);
        curl_global_cleanup();
        free(pParams);
        return -ERR_ERR;
    }

    memset(pParams, 0, sizeof(HTTP_REQ_PARAMS));

    pParams->onRspCb = onRespCb;
    pParams->pReqUrl = (char *)malloc(strlen(pURL) + 1);
    pParams->dlSize = 0;
    pParams->pCurl = pCurl;

    memset(pParams->pReqUrl, 0, strlen(pURL) + 1);
    strcpy(pParams->pReqUrl, pURL);

    pList = curl_slist_append(NULL, "Content-Type:application/json;charset=UTF-8");

    curl_easy_setopt(pCurl, CURLOPT_WRITEFUNCTION, __writeDataCb);
    curl_easy_setopt(pCurl, CURLOPT_WRITEDATA, pParams);
    curl_easy_setopt(pCurl, CURLOPT_PRIVATE, pParams);
    curl_easy_setopt(pCurl, CURLOPT_URL, pURL);
    curl_easy_setopt(pCurl, CURLOPT_NOPROGRESS, value);
    curl_easy_setopt(pCurl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
    curl_easy_setopt(pCurl, CURLOPT_HTTPHEADER, pList);

    if(pPost != NULL && strlen(pPost) > 0) {
        curl_easy_setopt(pCurl, CURLOPT_POSTFIELDS, pPost);
        curl_easy_setopt(pCurl, CURLOPT_POSTFIELDSIZE, (long)strlen(pPost));
    }

#ifdef SKIP_PEER_VERIFICATION
        /*
     * If you want to connect to a site who isn't using a certificate that is
     * signed by one of the certs in the CA bundle you have, you can skip the
     * verification of the server's certificate. This makes the connection
     * A LOT LESS SECURE.
     *
     * If you have a CA cert for the server stored someplace else than in the
     * default bundle, then the CURLOPT_CAPATH option might come handy for
     * you.
     */
    curl_easy_setopt(pCurl, CURLOPT_SSL_VERIFYPEER, 0L);
#else
    curl_easy_setopt(pCurl, CURLOPT_CAINFO, SSL_CA_FILE);
    curl_easy_setopt(pCurl, CURLOPT_SSL_VERIFYPEER, value);
#endif

#ifdef SKIP_HOSTNAME_VERIFICATION
    /*
     * If the site you're connecting to uses a different host name that what
     * they have mentioned in their server certificate's commonName (or
     * subjectAltName) fields, libcurl will refuse to connect. You can skip
     * this check, but this will make the connection less secure.
     */
    curl_easy_setopt(pCurl, CURLOPT_SSL_VERIFYHOST, 0L);
#endif

    ret = curl_easy_perform(pCurl);

    if(ret != CURLE_OK) {
        LOG_EX(LOG_Error, "Http Post error: %u\n", ret);
    }

    curl_slist_free_all(pList);
    curl_easy_cleanup(pCurl);
    curl_global_cleanup();

    if(onRespCb) {
        onRespCb(pParams->reqResult, pParams->dlSize, pParams->pReqUrl, pParams->sPath,
                 NULL, -pParams->errCode, NULL);
    }

    if(pParams->pReqUrl) {
        free(pParams->pReqUrl);
    }

    free(pParams);

    return ret;
}