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

void fileName(char *dest, int num) {
    strcpy(dest, "storage/");

    int len = 0, tempNum = num;
    while(tempNum > 0) {
        tempNum /= 10;
        len++;
    }
    int *numArr = (int*) malloc(len * sizeof(int));
    char *numString = (char*) malloc((len + 1) * sizeof(char));
    
    int i = 0; tempNum = num;
    while(i < len) {
        num /= 10;
        numArr[len - ++i] = tempNum - 10 * num;
        tempNum = num;
    }
    
    for(i = 0; i < len; i++) {
        numString[i] = numArr[i] + '0';
    }
    numString[len] = '\0';

    strcat(dest, numString);
    strcat(dest, ".txt");

    return;
}

void check(float *storage, float check, int max) {
    if ((check > *storage) == max) *storage = check;
    return;
}

int main() {
    int fileNum = 1;
    char fName[50];

    fileName(fName, fileNum++);
    FILE *f = fopen(fName, "r");
    FILE *out = fopen("storage/stats.txt", "w");
    if(!out) printf("Could not open output file");
    fprintf(out, "Overall: 0.000-5.000v, avg:0.000v\nTotal Time: 0 Minutes     \n\n");

    int i = 0;
    float min = 5, max = 0, localMin = 5, localMax = 0;

    double sum = 0, localSum = 0;
    unsigned long count = 0;

    int time = 0;
    while(f) {
        char c = getc(f);
        char str[6]; int j = 0;
        while(c != EOF) {
            if(c != '\n') str[j++] = c;
            
            if(j >= 5) {
                str[5] = '\0';
                float f = atof((str));
                for(int k = 0; k < 6; k++) str[k] = 0;
                i++; j = 0;

                check(&localMin, f, 0);
                check(&localMax, f, 1);
                localSum += f;

                if(i >= 6000) {
                    fprintf(out, "%d-%d minutes: %.3f-%.3fv, avg:%.3fv.\n", time, time + 10, localMin, localMax, localSum / i);
                    sum += localSum; count += i;
                    check(&min, localMin, 0);
                    check(&max, localMax, 1);
                    localSum = 0; localMin = 5; localMax = 0;
                    i = 0; time += 10;
                }

            }
            c = getc(f);
        }
        fprintf(out, "%d-%d minutes: %.3f-%.3fv, avg:%.3fv.\n", time, time + 1 + i / 600, localMin, localMax, localSum / i);
        sum += localSum; count += i;
        check(&min, localMin, 0);
        check(&max, localMax, 1);
        localSum = 0; localMin = 5; localMax = 0;
        i = 0; time += 20;

        fclose(f);
        printf("Done with %s\n", fName);
        fileName(fName, fileNum++);
        f = fopen(fName, "r");
    }

    fseek(out, 9, SEEK_SET); //9 = length of total header
    fprintf(out, "%.3f-%.3fv, avg:%.3fv\n", min, max, sum / count);
    fprintf(out, "Total Time: %d Minutes", 1 + count / 600);
    fclose(out);

    return 0;
}