/*main.c*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "lib/max_functions.h"

//global variables
static int state=0;

int main(int argc, char *argv[])
{
    if (argc == 1)
        printf("max668_calc: Usage: max668_calc set_output_voltage -E [E series] -V [voltage]\n");

    for (int i = 0; i < argc; i++) {
        if (strcmp(argv[i], "-h") == 0) {
            printf("max668_calc: Usage: max668_calc set_output_voltage -E [E series] -V [voltage]\n");
            return EXIT_SUCCESS;
        }
    }

    int command = 0;

    for (int i = 1; i < argc; i++) {
        if (strcmp(argv[i], "set_output_voltage") == 0) {

            command = 1;
        }
        else if ((strchr(argv[i], '-') == NULL) && (strchr(argv[i-1], '-') == NULL)) {

            printf("max668_calc: Usage: max668_calc set_output_voltage -E [E series] -V [voltage]\n");
            return EXIT_SUCCESS;
        }
    }

    double voltage = 0.0;
    ESeries e_series;
    char input[10];
    int read_number;
    int temp_result;

    switch (command) {

        case 1:

            for (int i = 0; i < argc; i++) {

                if (argv[i][0] == '-') {

                    if (strcmp(argv[i], "-V") == 0) {

                        if(strlen(argv[i+1]) > 9) {

                            printf("max668_calc: Malformed voltage format.");
                            return EXIT_FAILURE;
                        }

                        strncpy(argv[i+1], input, strlen(argv[i+1]));
                        input[strlen(argv[i+1])+1] = '\0';

                        if (input[strlen(input)] == 'V') {

                            input[strlen(input)] = '\0';
                        }

                        temp_result = sscanf(input, "%lf", &voltage);

                        if (temp_result == 0) {
                            printf("max668_calc: Malformed voltage format.");
                            return EXIT_FAILURE;
                        }
                    }

                    else if (strcmp(argv[i], "-E") == 0) {

                        if(strlen(argv[i+1]) > 9) {

                            printf("max668_calc: Malformed E series format.");
                            return EXIT_FAILURE;
                        }

                        strncpy(argv[i+1], input, strlen(argv[i+1]));
                        input[strlen(argv[i+1])+1] = '\0';

                        if (input[0] == 'E') {

                            strcpy(input, &input[1]);
                        }

                        temp_result = sscanf(input, "%i", &read_number);

                        if (temp_result == 0) {
                            printf("max668_calc: Malformed E-Series format.");
                            return EXIT_FAILURE;
                        }

                        e_series = get_E_Series(read_number);
                    }

                    else {
                        printf("max668_calc: Unknown option. Use max668_calc -h\n");
                        return EXIT_FAILURE;
                    }
                }
            }
            set_output_voltage(voltage, e_series);
            break;

        default:
            printf("max668_calc: Command not found. Use max668_calc -h\n");
            break;
    }

    return EXIT_SUCCESS;
}