#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdbool.h>
#include <string.h>
#include <regex.h>
#include <zmq.h>
#include "transfer_defines.h"

char *get_file_content(FILE *fp)
{
    char *buffer = (char*)malloc(sizeof(char) * MESSAGE_LENGTH);
    if (buffer == NULL)
    {
        perror("Failed to allocate memory for buffer");
        return NULL;
    }

    const size_t bytes_read = fread(buffer, sizeof(char), MESSAGE_LENGTH - 1, fp);
    if (bytes_read == 0)
    {
        perror("File is empty or nothing is left to read");
        free(buffer);
        return NULL;
    }

    buffer[bytes_read] = '\0';

    int delimiter_pos = (int)bytes_read - 1;
    while (delimiter_pos >= 0 && !isalpha(buffer[delimiter_pos])) { delimiter_pos--; }

    if (delimiter_pos < 0)
    {
        perror("No delimiting character was found -> taking whole buffer");
        delimiter_pos = (int)bytes_read;
    }

    buffer[delimiter_pos] = '\0';

    if (fseek(fp, delimiter_pos - (int) bytes_read + 1, SEEK_CUR) != 0)
    {
        perror("Failed to seek in file");
        free(buffer);
        return NULL;
    }

    return buffer;
}

pthread_mutex_t words_mutex;

void *receiver()
{

}

int main(const int argc, char **argv) {
    if(argc < 3){
        fprintf(stderr, "Usage: %s <file.txt> <worker port 1> <worker port 2> ... <worker port n>", argv[0]);
        exit(1);
    }

    void *context = zmq_ctx_new();
    void *responder = zmq_socket(context, ZMQ_PULL);
    int rc = zmq_bind(responder, "tcp://localhost:5555");

    if (rc != 0)
    {
        perror("Failed to bind");
        exit(1);
    }

    pthread_mutex_init(&words_mutex, NULL);

    FILE *fp = fopen(argv[1], "r");
    char *file_content_chunks;
    int worker_index = 1;
    while ((file_content_chunks = get_file_content(fp)) != NULL)
    {
        // TODO: send to worker

        free(file_content_chunks);
    }
    fclose(fp);

    return 0;
}