#include "SdFat.h"

#define SPI_SPEED SD_SCK_MHZ(4)
#define CS_PIN 10

SdFat sd;

int motionPin=2;
int doorPin=3;
int tamperPin=4;

bool motion=false;
bool doorOpened=false;
int tamperInterval=1000;
int tamperPing=0;

File file;

void setup() {
  Serial.begin(9600);

  if (!sd.begin(CS_PIN, SPI_SPEED)) {
    if (sd.card()->errorCode()) {
      Serial.println("SD initialization failed.");
    } else if (sd.vol()->fatType() == 0) {
      Serial.println("Can't find a valid FAT16/FAT32 partition.");
    } else {
      Serial.println("Can't determine error type");
    }
    return;
  }

  pinMode(motionPin, INPUT);
  pinMode(doorPin, INPUT_PULLUP);
  pinMode(tamperPin, INPUT_PULLUP);
}

void loop() {
  String commande=Serial.readString();
  commande.trim();
  char buffer[32];
  commande.toCharArray(buffer,32);
  
  if(!strcmp(buffer,"logs")){
    Serial.println("Logs:");
    char line[32];
    file=sd.open("log.txt", O_RDONLY);
    while(file.fgets(line, sizeof(line)) > 0){
      Serial.print(line);
    }
  }
  else if(!strcmp(strtok(buffer," "),"log")){
    char str[64];
    strcpy(str,strtok(NULL,""));
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND); //IA
    file.print("---");
    file.print(str);
    file.println("-------");
    file.close();
  }
  else if(!strcmp(buffer,"clear")){
    file=sd.open("log.txt", O_WRITE | O_TRUNC);
    file.close();
  }

  if(digitalRead(motionPin)==HIGH && !motion){
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND); //IA
    Serial.print("Detected something\n");
    file.println("Detected something");
    motion=true;
    file.close();
  }
  else if(digitalRead(motionPin)==LOW && motion){
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND);
    Serial.print("Not detecting it anymore\n");
    file.println("Not detecting it anymore");
    motion=false;
    file.close();
  }

  if(digitalRead(doorPin)==HIGH && !doorOpened){
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND);
    Serial.print("door opened\n");
    file.println("door opened");
    doorOpened=true;
    file.close();
  }
  else if(digitalRead(doorPin)==LOW && doorOpened){
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND);
    Serial.print("door closed\n");
    file.println("door closed");
    doorOpened=false;
    file.close();
  }

  if(digitalRead(tamperPin)==HIGH && millis()-tamperPing>=tamperInterval){
    file=sd.open("log.txt", O_WRITE | O_CREAT | O_APPEND);
    Serial.print("being tampered\n");
    file.println("being tampered");
    file.close();

    tamperPing=millis();
  }

  delay(500);
}