#ifndef HTTP_CURL
#define HTTP_CURL
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include "auth.h"

// Buffer to store the response
struct ResponseBuffer {
    char *data;    // Pointer to the response data
    size_t size;   // Size of the data
};

// Callback function to handle the response
static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userp) {
    size_t total_size = size * nmemb;
    struct ResponseBuffer *response = (struct ResponseBuffer *)userp;

    // Reallocate memory to fit new data
    char *ptr = realloc(response->data, response->size + total_size + 1);
    if (ptr == NULL) {
        fprintf(stderr, "Failed to allocate memory for response\n");
        return 0; // Returning 0 will signal libcurl to abort the request
    }

    // Assign the newly allocated memory to response->data
    response->data = ptr;

    // Copy the new data into the buffer
    memcpy(&(response->data[response->size]), contents, total_size);

    // Update the size of the buffer
    response->size += total_size;

    // Null-terminate the string
    response->data[response->size] = '\0';

    return total_size;
}

char * curl_post(const char * url, const char * data) {
    CURL *curl;
    CURLcode res;

    struct ResponseBuffer response;
    response.data = (char *)malloc(1); 
    response.size = 0;         

    curl = curl_easy_init();
    if (curl) {
        struct curl_slist *headers = NULL;

        curl_easy_setopt(curl, CURLOPT_URL, url);

        headers = curl_slist_append(headers, "Content-Type: application/json");
        
        char * bearer_header = (char *)malloc(1337);
        sprintf(bearer_header, "Authorization: Bearer %s", resolve_api_key());
        headers = curl_slist_append(headers, bearer_header);

        free(bearer_header);

        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&response);

        res = curl_easy_perform(curl);

        if (res != CURLE_OK) {
            fprintf(stderr, "Error occured: %s\n", curl_easy_strerror(res));
        } 

        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
        return response.data;
    }

    return 0;
}
#endif