#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <uuid/uuid.h>

#include "controller.h"
#include <macros.h>


controller*
controller_create(void)
{
    controller *result = malloc(sizeof(*result));
    uuid_generate(result->uuid);

    strcpy(result->name, "new emgauwa device");
    result->port = 0;
    result->relay_count = 10;

    result->relays = malloc(sizeof(*result->relays) * result->relay_count);
    uint8_t i;
    for(i = 0; i < result->relay_count; i++)
    {
        result->relays[i] = relay_init(i);
    }

    return result;
}

controller*
controller_read(void)
{
    FILE *fp;
    controller *result;;

    fp = fopen(CONTROLLER_FILE_NAME, "rb");

    if(fp == NULL)
    {
        LOG_ERROR("Error opening file");
        result = controller_create();

        return result;
    }

    uint8_t header[CONTROLLER_FILE_HEADER_SIZE];
    size_t read_size;

    read_size = fread(header, sizeof(*header), CONTROLLER_FILE_HEADER_SIZE, fp);
    if(ferror(fp) || read_size != CONTROLLER_FILE_HEADER_SIZE)
    {
        LOG_ERROR("Error reading header");
        result = controller_create();

        return result;
    }

    uint8_t version = header[0];
    printf("%d\n", version);


    // size_t fread(void *ptr, size_t size_of_elements, size_t number_of_elements, FILE *a_file);

    fclose(fp);

    result = controller_create();

    return result;
}

int
controller_save(controller* ci)
{
    FILE *fp;

    fp = fopen(CONTROLLER_FILE_NAME, "w+b");

    if(fp == NULL)
    {
        LOG_ERROR("Error creating or opening file");
        return 1;
    }

    uint8_t header[CONTROLLER_FILE_HEADER_SIZE];
    header[0] = CONTROLLER_FILE_VERSION;

    fwrite(header, sizeof(*header), CONTROLLER_FILE_HEADER_SIZE, fp);
    fwrite(ci->name, sizeof(*ci->name), CONTROLLER_NAME_LENGTH, fp);

    fclose(fp);

    return 0;
}