#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LAENGE 100 //länger der einzelnen Zeilen
#define ANZAHL 10 //Anzahl der Zeilen

enum
{
    CONFIG_FREQUENZ,
    CONFIG_FDMANALOG1,
    CONFIG_FDMANALOG2,
    CONFIG_UPPER_LIMIT,
    CONFIG_LOWER_LIMIT,
    CONFIG_MONITOR,
    CONFIG_DISPLAY,
    N_CONFIG_OPTIONS
};

#define CONFIG_FDMANALOG1_NAME                       "FDM Analog Wert 1"
#define CONFIG_FDMANALOG2_NAME                       "FDM Analog Wert 2"
#define CONFIG_FREQUENZ_NAME                         "Frequenz"
#define CONFIG_UPPER_LIMIT_NAME                      "Upper Limit"
#define CONFIG_LOWER_LIMIT_NAME                      "Lower Limit"
#define CONFIG_MONITOR_NAME                          "Monitoring"
#define CONFIG_DISPLAY_NAME                          "Display"


#define CONFIG_FREQUENZ_VARNAME                         "fdm powerline frequency"
#define CONFIG_FDMANALOG1_VARNAME                       "fdm analog 1"
#define CONFIG_FDMANALOG2_VARNAME                       "fdm analog 2"
#define CONFIG_UPPER_LIMIT_VARNAME                      "upper limit"
#define CONFIG_LOWER_LIMIT_VARNAME                      "lower limit"
#define CONFIG_MONITOR_VARNAME                          "monitor"
#define CONFIG_DISPLAY_VARNAME                          "display"



#define DEFAULT_CONFIG_NAMES           \
{                                      \
  CONFIG_FREQUENZ_NAME,                 \
  CONFIG_FDMANALOG1_NAME,                   \
  CONFIG_FDMANALOG2_NAME,                   \
  CONFIG_UPPER_LIMIT_NAME,              \
  CONFIG_LOWER_LIMIT_NAME,              \
  CONFIG_MONITOR_NAME,                   \
  CONFIG_DISPLAY_NAME,                   \
}

#define DEFAULT_CONFIG_VARNAMES           \
{                                          \
  CONFIG_FREQUENZ_VARNAME,                 \
  CONFIG_FDMANALOG1_VARNAME,               \
  CONFIG_FDMANALOG2_VARNAME,               \
  CONFIG_UPPER_LIMIT_VARNAME,              \
  CONFIG_LOWER_LIMIT_VARNAME,              \
  CONFIG_MONITOR_VARNAME,                   \
  CONFIG_DISPLAY_VARNAME,                   \
 }
#define ToHex(Y) (Y>='0'&&Y<='9'?Y-'0':Y-'A'+10)

char *str_ptr;
char values[4096];
char InputData[4096];
char tmp[256];
FILE* env;
int i;
char *ns = NULL;

char *config_names[N_CONFIG_OPTIONS]= DEFAULT_CONFIG_NAMES;
char *config_varnames[N_CONFIG_OPTIONS]= DEFAULT_CONFIG_VARNAMES;

void getParam(const char *Name, char *Value) {
char *pos1 = strstr(InputData, Name);

if (pos1) {
pos1 += strlen(Name);

if (*pos1 == '=') { // Make sure there is an '=' where we expect it
pos1++;

while (*pos1 && *pos1 != '&') {
if (*pos1 == '%') { // Convert it to a single ASCII character and store at our Valueination
*Value++ = (char)ToHex(pos1[1]) * 16 + ToHex(pos1[2]);
pos1 += 3;
} else if( *pos1=='+' ) { // If it's a '+', store a space at our Valueination
*Value++ = ' ';
pos1++;
} else {
*Value++ = *pos1++; // Otherwise, just store the character at our Valueination
}
}

//*Value++ = '\0';
return;
}

}
strcpy(Value, "undefine"); // If param not found, then use default parameter
return;
}

void getAllParams() {
// Determing if it is a POST or GET method
    env = fopen("/www/cgi-bin/temp/current_environment", "r");

    //Inhalt der Environment Datei lesen
    while(env!=NULL && fgets(tmp, sizeof(tmp),env)!=NULL)
        {
        if (strstr(tmp, "QUERY_STRING='"))
            strcpy(InputData, tmp);
        str_ptr = strtok(tmp, "&'");
        }
}

int main(int argc, char** argv) {
    //Variablen setzen
    FILE* fdmfile;
    FILE* fdmconfig;
    char data[80];
    char* fdminfo;
    double f, fd,td;
    char ref[20] ="", plt[20] = "";
    char query[255];
    char line[256];
    int linenum=0;
    char aktuelleseite[100] = "";
    char modulname[100] = "fdmmodul";
    char submit[100];

getAllParams();
getParam("value", aktuelleseite);
getParam("submit", submit);
printf("Wert von Submit: %s" , submit);

if (submit == "undefine")
{
    printf("Das Formular wurde abgeschickt");
}

    //fdm_info Datei öffnen
    fdmfile = fopen("/fdm_info", "r");

   //checken ob fdm_info geöffnet werden konnte
    if(fdmfile == NULL)
        goto done;

   //Inhalt der fdm_info holen und ausgeben
    if( fgets(data,80, fdmfile))

    //fdm_info String aufsplitten
    sscanf(data,"F:%lf FD:%lf REF:%s PLT:%s TD:%lf", &f, &fd, ref, plt, &td);

    //hier beginnt das HTML gefrickel
    printf("<div class=confhead>\n");
    printf("<a href='#10' onMouseUp = \"javascript:showHideInfo('id10','img_10');\">\n");
    printf("<img class=opener src='/images/open.gif' alt='Open Box' border = 0 id=img_10  title = 'Aktuelle FDM Daten'>\n");
    printf("Aktuelle FDM Daten</a></div>\n");
    printf("<div style = 'display:none' id=id10>\n");
    printf("<div class=cfgform><div class=cl-left></div><div class=cfgsubconfhead>FDM Daten</div><div class=cfgborders style='height:50px';><div class=cfginput>\n");
    //Tabelle mit den Aktuellen Daten generieren
    printf("<span class=cfglabel style=\"width:100px;\">Frequenz: %f Hz&nbsp;&nbsp;</span>", f);
    printf("<span class=cfglabel style=\"width:150px;\">Frequenz Differenz: %f Hz&nbsp;&nbsp;</span>", fd);
    printf("<span class=cfglabel style=\"width:100px;\">Referenzzeit: %s&nbsp;&nbsp;</span>",ref);
    printf("<span class=cfglabel style=\"width:100px;\">Powerlinetime: %s&nbsp;&nbsp;</span>",plt);
    printf("<span class=cfglabel style=\"width:100px;\">Zeit Differenz: %fs&nbsp;&nbsp;</span>",td);
    printf("</div></div></div></div><br /><br />");


    //fdm_info schließen
    fclose(fdmfile);

    //HTML Gefrickel Teil 2
    printf("<form action = 'mainv2' method=GET>\n");
    printf("<input type=hidden name=value value=%s />", aktuelleseite);
    printf("<input type=hidden name=callexternalcgi value=%s />", modulname);
    printf("<div class=confhead>\n");
    printf("<a href='#10' onMouseUp = \"javascript:showHideInfo('id11','img_11');\">\n");
    printf("<img class=opener src='/images/open.gif' alt='Open Box' border = 0 id=img_11  title = 'FDM Konfiguration'>\n");
    printf("FDM Konfiguration</a></div>\n");
    printf("<div style = 'display:none' id=id11>\n");
    printf("<div class=cfgform><div class=cl-left></div><div class=cfgsubconfhead>FDM Konfiguration</div><div class=cfgborders style='height:auto;'><div class=cfginput>\n");

    //FDM Konfiguration holen
    fdmconfig = fopen("/etc/fdm_monitor.conf", "r");
    //Konnte FDM Config gelesen werden?

    if(fdmconfig == NULL)
    {
        printf("Couldn't open fdm_monitor.conf\n");
        exit(22);
    }

     char key[256], value[256];
    //Inhalt der FDM Config lesen und HTML Formular generieren
       while(fgets(line, sizeof(line), fdmconfig) != NULL)
        {
        //Feste Config Werte deklarieren
        linenum++;


        if(line[0] == '#') continue;

        if(sscanf(line, "%255[^=]= %255s", key, value) != 2)
        {
                fprintf(stderr, "Syntax error, line %d\n", linenum);
                continue;
        }

        for(i=0;i<N_CONFIG_OPTIONS;i++)
        {
            //printf("%s=%s\n<br>", key, config_varnames[i]);

            if(strncmp(key, config_varnames[i], strlen(config_varnames[i])) == 0)
           {
              printf("<span class=cfglabel style=\"width:120px;\">%s: &nbsp;</span><input type=text name = 'fdm.%s' value = '%s' size='30' id='fdm.%s' maxlength='100'><br />", config_names[i], config_varnames[i], value, config_varnames[i]);
           }

        }
       }
    //fdm_info schließen
    fclose(fdmconfig);

    //HTML abschließen
     printf("<input type=submit name=submit value=SaveConfig></div></div></div></div><br style=\"clear:both\" /><br /></form>");

done:
    return 0;
}