#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#include "BlogDB.h"

static int HelpMessage();
static int VersionMessage();
static int ShortArg(char currentArg[], int argIndex, char *argv[]);
static int LongArg(char currentArg[], int argIndex, char *argv[]);


int HelpMessage()
{
    printf("Usage: focussg [OPTION]\n");
    printf("FoCuSSG (Fordsmand's C Static Site Generator)\n");
    printf("\n");
    printf("  -h, --help       Show this help message.\n");
    printf("  -V, --version    Show the version number of FoCuSSG.\n");
    exit(0);
}

int VersionMessage()
{
    printf("Pre-Release\n");
    exit(0);
}

int ShortArg(char currentArg[], int argIndex, char *argv[])
{
    char* options;
    options = &currentArg[1];

    int count = strlen(options);

    if (count == 0) { HelpMessage(); exit(0); }

    for (int i = 0; i < count; ++i) {
        switch (options[i]) {
            case 'h':
                HelpMessage();
                break;
            case 'V':
                VersionMessage();
                break;
            case 0: // Missing character, should never happen
                exit(1);
                break;
            default:
                HelpMessage();
                break;
        }
    }
}

int LongArg(char currentArg[], int argIndex, char *argv[])
{
    char* option;
    option = &currentArg[2];

    if (strcmp(option, "help") == 0) 
        HelpMessage();
    else if (strcmp(option, "version") == 0) 
        VersionMessage();
    else if (strcmp(option, "") == 0) 
        HelpMessage();
    else 
        HelpMessage();
}


int main(int argc, char *argv[])
{
    if (argc == 1) HelpMessage();

    for (int i = 1; i < argc; ++i) 
    {
        if (argv[i][0] != '-') 
            HelpMessage();
        else if (argv[i][1] != '-') 
            ShortArg(argv[i], i, argv);
        else
            LongArg(argv[i], i, argv);
    }

    return 0;
}