/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
#include <linux/config.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
#include <led_config.h>
#include <led_ioctl.h>
#include "led.h"
#include "ledlib.h"
#include <malloc.h>
#include <string.h>
#include <stdio.h>

/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
#define MAX_HANDLES 30
static struct _led_handles {
    unsigned int used;
    LED_MODULE_T data;
} led_handles[MAX_HANDLES];

/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
int ledlib_init(void) {
    memset(led_handles, sizeof(struct _led_handles), 0x0);
    return 0;
}

/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
int ledlib_deinit(void) {
    return 0;
}

/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
void *ledlib_open(char *name, int instance) {
    unsigned char *handle;

    handle = malloc(sizeof(int) + strlen(name) + 1);
    if(handle == NULL) {
        return NULL;
    }
    *((int *) handle) = instance;
    strcpy(handle + sizeof(int), name);

    return handle;
}


/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
int ledlib_close(void *handle) {
    if(handle != NULL) {
        free(handle);
    }

    return 0;
}


/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
int ledlib_action(void *handle, int new_state) {
    char buffer[40];
    int led = open(LED_DEV_FILE, O_RDWR);
    if(led < 0)
        return -1;

    sprintf(buffer, "SET %s,%d = %d\n", (char *) handle + sizeof(int), *((int *) handle), new_state);
    write(led, buffer, strlen(buffer));
    close(led);

    return 0;
}


/*------------------------------------------------------------------------------------------*\
\*------------------------------------------------------------------------------------------*/
int ledlib_action_with_event(void *handle, int new_state, unsigned int param_len, void *param) {
    char buffer[4096];
    unsigned int length = 0;
    int led = open(LED_DEV_FILE, O_RDWR);
    if(led < 0)
        return -1;

    sprintf(buffer, "EVENT %s,%d = %d\n", (char *) handle + sizeof(int), *((int *) handle), new_state);
    length = strlen(buffer);

    length +=  3;
    length &= ~3;

    *((unsigned int *) (buffer + length)) = param_len;
    memcpy(buffer + length + sizeof(unsigned int), param, param_len);
    length += sizeof(unsigned int) + param_len;
    
    write(led, buffer, length);
    close(led);

    return 0;
}