/* voronoi.c
*
* Created by Rory Healy (healyr@student.unimelb.edu.au)
* 12th August 2021
* 
*/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "voronoi.h"

#define OPEN_FILE_ERROR "Error: Unable to open file %s\n"
#define NUM_FILE_ERROR "Error: Incorrect number of inputs (3 required).\n"
#define MALLOC_ERROR "Error: Cannot allocate memory.\n"

int main(int argc, char **argv) {
    FILE *dataset = NULL, *polygonData = NULL, *output = NULL;
    checkInputArgs(argc, argv, &dataset, &polygonData, &output);

    watchtower_t *watchtowers = (watchtower_t *) malloc(sizeof(watchtower_t));
    if (watchtowers == NULL) {
        fputs(MALLOC_ERROR, stderr);
        exit(EXIT_FAILURE);
    }

    readWatchtowers(watchtowers, dataset);

    // Cleaning up data
    free(watchtowers);
    fclose(dataset);
    fclose(polygonData);
    fclose(output);
    return 0;
}

void checkInputArgs(int argc, char **argv, FILE **datasetFile, \
FILE **polygonFile, FILE **outputFile) {
    if (argc != 4) {
        fputs(NUM_FILE_ERROR, stderr);
        exit(EXIT_FAILURE);
    }

    *datasetFile = fopen(argv[1], "r");
    if (*datasetFile == NULL) {
        fprintf(stderr, OPEN_FILE_ERROR, argv[1]);
        exit(EXIT_FAILURE);
    }
    
    *polygonFile = fopen(argv[2], "r");
    if (*polygonFile == NULL) {
        fprintf(stderr, OPEN_FILE_ERROR, argv[2]);
        exit(EXIT_FAILURE);
    }

    *outputFile = fopen(argv[3], "w");
    if (*outputFile == NULL) {
        fprintf(stderr, OPEN_FILE_ERROR, argv[3]);
        exit(EXIT_FAILURE);
    }
}

void readWatchtowers(watchtower_t *watchtowers, FILE* datasetFile) {
    char *lineBuffer;
    int lineCount = 0;
    size_t lineBufferSize = 512;
    size_t numberCharsRead;

    lineBuffer = (char *) malloc(lineBufferSize * sizeof(char));
    if (lineBuffer == NULL) {
        fprintf(stderr, MALLOC_ERROR);
        exit(EXIT_FAILURE);
    }

    numberCharsRead = getline(&lineBuffer, &lineBufferSize, datasetFile);
    while (numberCharsRead > 0) {
        lineCount += 1;
        printf("line[%06d]: chars=%06zd, buf size=%06zu, contents: %s",\
        lineCount, numberCharsRead, lineBufferSize, lineBuffer);
        numberCharsRead = getline(&lineBuffer, &lineBufferSize, datasetFile);
    }
    free(lineBuffer);
    lineBuffer = NULL;
}