#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

#define period 7

float temps[period];
char days[7][10] = {"pondeli", "utery", "streda" ,"ctvrtek" ,"patek" ,"sobota" ,"nedele" };

void inputTemp()
{
    printf("\nZadani teplot...\n\n");
    for (short i = 0; i < period; i++)
    {
        printf("Enter temp for %s: ", days[i%7]);
        scanf("%f", temps+i);
    }
    printf("\n");
}

void readFromFile()
{
    printf("\nNačítani teploty ze souboru...\n\n");
    printf("Please, enter input file name: ");
    char fName[255];
    scanf("%s", fName);
    FILE *inF = fopen(fName, "r");
    if (inF != NULL)
    {
        for (short i = 0; i < period; i++)
        {
            fscanf(inF, "%f", temps+i);
        }
        fclose(inF);
        printf("\n...Reading SUCESS!...\n");
    }
    else
        printf("File not found!!!\n");
    printf("\n");
}

void saveToFile()
{
    char fName[255];
    printf("\nUloženi teploty do souboru...\n\n");
    printf("Please, enter output file name: ");
    scanf("%s", fName);
    FILE *outF = fopen(fName, "w");
    if (outF != NULL)
    {
        for (short i = 0; i < period; i++)
        {
            fprintf(outF, "%.2f\n", temps[i]);
        }
        fclose(outF);
        printf("\n...Data was save...\n");
    }
    else
        printf("output file ERROR!!!\n");

    printf("\n");
}

void outputTemp()
{
    printf("\nTydenni prehled teplot...\n\n");
    for (short i = 0; i < period; i++)
    {
        printf("-----------------------\n");
        printf("| %-10s | %7.2f|\n", days[i], temps[i]);
    }
    printf("-----------------------\n");
    printf("\n");
}

void outputDayTemp()
{
    int day;
    printf("\nZadej den [1-po, ..., 7-ne] : ");
    scanf("%d", &day);
    printf("V den %d - %s je teplota %.2fst.C.\n\n\n", day, days[day-1], temps[day-1]);
}

void inputDayTemp()
{
    int day;
    printf("\nZadej den [1-po, ..., 7-ne] : ");
    scanf("%d", &day);
    printf("\nZadej teplotu: ");
    scanf("%f", temps+(day-1));
    printf("\n\n");
}
void stat()
{
    double sum = 0, max = temps[0];
    char flag = '0';
    int maxIndex = 0;
    for (int i = 0; i < period; i++)
    {
        sum = sum + temps[i];
        if (temps[i] > max)
        {
            max = temps[i];
            maxIndex = i;
        }
    }
    printf("\n**********************************");
    printf("\nPrumerna denni teplota je %.2fst.C.\n", sum/period);
    printf("Maximalni teplota %.2fst.C. nastala v %s (%d den)\n", max, days[maxIndex], maxIndex+1);
    for (int i = 0; i < period; i++)
    {
        for (int j = 0; j < period; j++)
        {
            if (i == j) continue;
            if (temps[i] == temps[j] && i < j)
            {
                if (flag == '0')
                {
                    printf("Dny se stejnou teplotou %.2fst.C. : %s", temps[i], days[i]);
                    flag = '1';
                }
                printf(", %s", days[j]);
            }
            else if (temps[i] == temps[j] && i > j)
                break;
        }
        if (flag == '1')
        {
            printf("\n");
            flag = '0';
        }

    }


    printf("\n**********************************\n");
}
int main()
{
    FILE *inpF = fopen("input.txt", "r");
    if (inpF != NULL)
    {
        for (short i = 0; i < period; i++)
        {
            fscanf(inpF,"%f",temps+i);
        }
        fclose(inpF);
    }
    else
    {
        for (short i = 0; i < period; i++)
        {
            temps[i] = 0;
        }
    }
    char key;
    do
    {
        printf("0. Konec;\n");
        printf("1. Zadat teploty na klávesnici;\n");
        printf("2. Načíst teploty ze souboru;\n");
        printf("3. Uložit teploty do souboru;\n");
        printf("4. Zobrazit teploty;\n");
        printf("5. Zobrazit teplotu v zadaný den (číslo od 1 do 7);\n");
        printf("6. Změna teploty v zadaný den (číslo od 1 do 7);\n");
        printf("7. Statistika teplot\n   (určí se průměrná denní teplota a informace, jestli existuje více dnů se stejnou teplotou).\n");
        do
        {
            key = getch();
        } while (key != '1' && key != '2' && key != '3' && key != '4'
            && key != '0' && key != '5' && key != '6' && key != '7');
        switch (key)
        {
        case '0':
            break;
        case '1':
            inputTemp();
            break;
        case '2':
            readFromFile();
            break;
        case '3':
            saveToFile();
            break;
        case '4':
            outputTemp();
            break;
        case '5':
            outputDayTemp();
            break;
        case '6':
            inputDayTemp();
            break;
        case '7':
            stat();
            break;
        default:
            continue;
            break;
        }


    } while (key != '0');


    return 0;
}