diff --git a/.clang-format b/.clang-format
index 182267a..64937c3 100644
--- a/.clang-format
+++ b/.clang-format
@@ -1,12 +1,22 @@
 BasedOnStyle: LLVM
 IndentWidth: 4
-#-------------
+
+#--- cpp
 
 Language: Cpp
-
 PointerAlignment: Left
-ColumnLimit: 120
-AllowAllArgumentsOnNextLine: true
-BreakConstructorInitializersStyle : BCIS_AfterColon
+ColumnLimit: 80
+AlignAfterOpenBracket: Align 
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: true
+BinPackArguments: false
+BreakConstructorInitializers: BeforeColon 
 ConstructorInitializerAllOnOneLineOrOnePerLine: true
 Cpp11BracedListStyle: true
+IncludeBlocks: Regroup
+
+#---
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c278d3c..7f77bd2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -9,7 +9,17 @@ include_directories(
 )
 
 
-add_executable(park main.cpp data.cpp headers/data.h Customer.cpp headers/Customer.h  Park_spot.cpp headers/Park_spot.h Park_time.cpp headers/Park_time.h)
+add_executable(park
+        main.cpp
+        data.cpp
+        headers/data.h
+        Customer.cpp
+        headers/Customer.h 
+        Park_spot.cpp
+        headers/Park_spot.h
+        Park_time.cpp
+        headers/Park_time.h
+ )
 
 
 
diff --git a/Customer.cpp b/Customer.cpp
index 67de740..85948ac 100644
--- a/Customer.cpp
+++ b/Customer.cpp
@@ -1,84 +1,82 @@
 #include "headers/Customer.h"
-#include <iostream>
 
 // constructors
-Customer::Customer(string name_, Verhicle_type verhicle_, SQLite::Database& db):
-    name{name_}, verhicle{verhicle_},
-    card_code{gen_cardcode()}
-{
-    id = auto_increment_db(db) + 1;
-    save_db(db);
+Customer::Customer(string name_, Verhicle_type verhicle_)
+    : name{name_}, verhicle{verhicle_}, card_code{gen_cardcode()} {
+    id = auto_increment_db() + 1;
+    save_db();
 }
 
-Customer::Customer(int id_, string name_, string card_code_, Verhicle_type verhicle_, vector<Park_time> instances)
-    : name{name_}, 
-     card_code{card_code_},
-     verhicle{verhicle_},
-     park_instances{instances}
-{
+Customer::Customer(int id_, string name_, string card_code_,
+                   Verhicle_type verhicle_, vector<Park_time> instances)
+    : name{name_},
+      card_code{card_code_},
+      verhicle{verhicle_},
+      park_instances{instances} {}
 
-}
+Customer::~Customer() { update_db(); }
 
-
-
-// clock methods ====================================================================================
+// clock in/out methods
+// ====================================================================================
 /*
-creert een park_time object met start time= nu, en voegt t toe aan een vector.
+Create a p_time object with start=now and adds to vector
  */
 void Customer::clock_in(int s_id) {
     Park_time pt{id, s_id};
     park_instances.push_back(pt);
 }
 
-// edit de laatste park_time obj in de vector zodat de end_time = now.
-void Customer::clock_out(int s_id) { park_instances[park_instances.size() - 1].clock_out(id, s_id); }
+// edit last p_time object so end=now
+void Customer::clock_out(int s_id) {
+    park_instances[park_instances.size() - 1].clock_out(id, s_id);
+}
 
 // report gen
 void Customer::gen_monthly() {
-    std::cout << "NAME: " << name << " card code: " << card_code << "\n";
-    std::cout << "-------------------------------------------------\n";
+    cout << "NAME: " << name << " card code: " << card_code << "\n";
+    cout << "-------------------------------------------------\n";
     for (auto& i : park_instances) {
-        // TODO: need some logic to only include from this month
-        std::cout << i;
+        // TODO: need some logic to only include from this month. scratch that,
+        // need to remove gen monthly
+        cout << i;
     }
-    std::cout << "-------------------------------------------------\n\n";
+    cout << "-------------------------------------------------\n\n";
 }
 
 //================================================================================================
 // functions that interact with the database
 
-void Customer::save_db(SQLite::Database& database) {
+void Customer::save_db() {
     string statement{"insert into Customer values (, '', '', );"};
     // after ( = 28)
-    statement.insert(38, std::to_string(int(verhicle)));
+    statement.insert(38, to_string(int(verhicle)));
     statement.insert(36, card_code);
     statement.insert(32, name);
-    statement.insert(29, "null");
-    SQLite::Transaction transaction(database);
-    database.exec(statement);
+    statement.insert(29, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
     transaction.commit();
 }
 
-void Customer::update_db(SQLite::Database& database) {
-    string statement = "UPDATE Customer SET name = \"\", card_code = \"\" where id = '';";
-    statement.insert(58, std::to_string(id));
+void Customer::update_db() {
+    string statement =
+        "UPDATE Customer SET name = '', card_code = '' where id = '';";
+    statement.insert(58, to_string(id));
     statement.insert(44, card_code);
     statement.insert(28, name);
-    // std::cout << statement; TODO: set some logging here
-    database.exec(statement);
+    data::db.exec(statement);
 }
 
-void Customer::delete_db(SQLite::Database& database) {
+void Customer::delete_db() {
     string statement = "delete from Customer where id= ;";
-    statement.insert(statement.length() - 2, std::to_string(id));
-    // std::cout << statement;
-    SQLite::Transaction transaction(database);
-    database.exec(statement);
+    statement.insert(statement.length() - 2, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
     transaction.commit();
 }
 
-int Customer::auto_increment_db(SQLite::Database& database) {
-    SQLite::Statement max_id(database, "select max(id) from Customer;");
+int Customer::auto_increment_db() {
+    SQLite::Statement max_id(data::db, "select max(id) from Customer;");
     int id = 0;
     max_id.executeStep();
     id = max_id.getColumn(0);
diff --git a/Park_spot.cpp b/Park_spot.cpp
index 929a7d4..edb30d6 100644
--- a/Park_spot.cpp
+++ b/Park_spot.cpp
@@ -1,21 +1,77 @@
 #include "headers/Park_spot.h"
 
-Park_spot::Park_spot(int id_){
-    parked = nullptr;
-    id = id_;
-    taken = false;
+// constructors
+
+Park_spot::Park_spot()
+    : parked{nullptr}, id{auto_increment_db() + 1}, taken{false} {
+    save_db();
 }
 
-// clock in en out, calls de juist(in/out) van de customer aan de hand van internal state van taken
-void Park_spot::clock(Customer* c_customer){
-    if (!taken){
+Park_spot::Park_spot(Customer* parked_, int id_, bool taken_)
+    : parked{nullptr},
+      id{id_},
+      taken{taken_} // TODO: think about how init parked?
+{}
+
+Park_spot::~Park_spot() { update_db(); }
+
+// clock in en out, calls de juist(in/out) van de customer aan de hand van
+// internal state van taken
+void Park_spot::clock(Customer* c_customer) {
+    if (!taken) {
         parked = c_customer;
         taken = true;
         parked->clock_in(id);
-    }
-    else{
+        update_db();
+    } else {
         taken = false;
         parked->clock_out(id);
         parked = nullptr;
+        update_db();
     }
+}
+
+// --------------------- db functs
+
+void Park_spot::update_db() {
+    string statement =
+        "UPDATE Park_spot SET taken = '', customer_id  = '' where id = '';";
+    statement.insert(63, to_string(id));
+    if (taken) {
+        statement.insert(49, to_string(parked->id));
+        statement.insert(30, "true");
+    } else {
+        statement.insert(49, "NULL");
+        statement.insert(30, "false");
+    }
+    data::db.exec(statement);
+}
+
+void Park_spot::save_db() {
+    //(int id, bool taken, int customer_id)
+    string statement{"insert into Park_spot values ( , , );"};
+    // after ( = 28)
+    statement.insert(34, "NULL");
+    statement.insert(32, "false");
+    statement.insert(30, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
+    transaction.commit();
+}
+
+void Park_spot::delete_db() {
+    string statement = "delete from Park_spot where id= ;";
+    statement.insert(statement.length() - 2, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
+    transaction.commit();
+}
+
+int Park_spot::auto_increment_db() {
+    SQLite::Statement max_id(data::db, "select max(id) from Park_spot;");
+    int id = 0;
+    max_id.executeStep();
+    id = max_id.getColumn(0);
+    max_id.reset();
+    return id;
 }
\ No newline at end of file
diff --git a/Park_time.cpp b/Park_time.cpp
index 26f319b..963a53d 100644
--- a/Park_time.cpp
+++ b/Park_time.cpp
@@ -1,39 +1,49 @@
-#include"headers/Park_time.h"
-#include <iostream>
-#include <ctime>
-
+#include "headers/Park_time.h"
 
 Park_time::Park_time(int c_id, int s_id)
-    : customer_id { c_id }
-    , spot_id { s_id }
-    , duration { 0 }
-    , start { high_resolution_clock::now() }
-{
+    : customer_id{c_id},
+      spot_id{s_id},
+      duration{0},
+      start{high_resolution_clock::now()},
+      id{auto_increment_db() + 1} {
+    save_db();
 }
 
-void Park_time::clock_out(int c_id, int s_id)
-{
+Park_time::Park_time(int id_, int customer_id_, int spot_id_, int start_,
+                     int duration_)
+    : id{id_},
+      customer_id{customer_id_},
+      spot_id{spot_id_},
+      duration{duration_} {
+    start = time_point<system_clock>(seconds(start_));
+    end = time_point<system_clock>(seconds(start_ + duration_));
+}
+
+Park_time::~Park_time() { update_db(); }
+
+void Park_time::clock_out(int c_id, int s_id) {
 
     if (c_id != customer_id) {
-        std::cout << "wrong customer id, you are at the wrong location";
+        cout << "wrong customer id, you are at the wrong location";
         return;
     }
     if (s_id != spot_id) {
-        std::cout << "Wrong spot id, you're at the wrong location";
+        cout << "Wrong spot id, you're at the wrong location";
         return;
     }
 
     if (!duration) {
         end = high_resolution_clock::now();
-        duration = duration_cast<seconds>(end - start).count(); // use mins later
+        duration =
+            duration_cast<seconds>(end - start).count(); // use mins later
+        update_db();
 
     } else {
-        std::cout << "Already clocked out. Something is wrong \n";
+        cout << "Already clocked out. Something is wrong \n";
     }
 }
 
-
-std::ostream& operator<<(std::ostream& os, const Park_time & pt){
+std::ostream& operator<<(std::ostream& os, const Park_time& pt) {
     std::time_t start_ = system_clock::to_time_t(pt.start);
     std::time_t end_ = system_clock::to_time_t(pt.end);
     os << "- - - - - - - - - - - - - - - - - - - -\n";
@@ -44,13 +54,44 @@ std::ostream& operator<<(std::ostream& os, const Park_time & pt){
     return os;
 }
 
-void Park_time::debug() {
+int Park_time::start_to_int() {
     auto start_to_epoch = start.time_since_epoch();
-    auto start_value = std::chrono::duration_cast<std::chrono::seconds>(start_to_epoch);
+    auto start_value = duration_cast<seconds>(start_to_epoch);
     int start_seconds = start_value.count();
+    return start_seconds;
+}
 
-    auto end_to_epoch = end.time_since_epoch();
-    auto end_value = std::chrono::duration_cast<std::chrono::seconds>(start_to_epoch);
-    int end_seconds = end_value.count();
-    std::cout << "<" << start_seconds << "-" << end_seconds << ">" ;
+// db funcs
+// -----------------------------------------------------------------------------
+
+void Park_time::save_db() {
+    string statement{"insert into Park_time values ( , , , , , );"};
+    statement.insert(41, "NULL");
+    statement.insert(39, "NULL");
+    statement.insert(37, to_string(start_to_int()));
+    statement.insert(35, to_string(spot_id));
+    statement.insert(33, to_string(customer_id));
+    statement.insert(31, to_string(id));
+    SQLite::Transaction transaction(data::db);
+    data::db.exec(statement);
+    transaction.commit();
+}
+
+void Park_time::update_db() {
+    string statement =
+        "UPDATE Park_time SET end = , duration =  where id = '';";
+    statement.insert(53, to_string(id));
+    statement.insert(40, to_string(duration));
+    statement.insert(27, to_string(start_to_int() + duration));
+    data::db.exec(statement);
+}
+
+// to get id on first save to db
+int Park_time::auto_increment_db() {
+    SQLite::Statement max_id(data::db, "select max(id) from Park_time;");
+    int id = 0;
+    max_id.executeStep();
+    id = max_id.getColumn(0);
+    max_id.reset();
+    return id;
 }
\ No newline at end of file
diff --git a/data.cpp b/data.cpp
index f8d1fa3..7176131 100644
--- a/data.cpp
+++ b/data.cpp
@@ -2,12 +2,20 @@
 
 namespace data {
 
-SQLite::Database start_db() {
-    SQLite::Database db("test.db3", SQLite::OPEN_READWRITE | SQLite::OPEN_CREATE);
+SQLite::Database
+start_db() {
+    SQLite::Database db("test.db3",
+                        SQLite::OPEN_READWRITE | SQLite::OPEN_CREATE);
 
-    db.exec("create table if not exists Customer (id integer primary key, name text, card_code varchar(20), verhicle int)");
-    db.exec("create table if not exists Park_spot (id integer primary key, taken boolean, customer_id int)");
-    db.exec("create table if not exists Park_time (id integer primary key, customer_id int, spot_id int, start real, end real, duration real)");
+    db.exec(
+        "create table if not exists Customer (id integer primary key, name "
+        "text, card_code varchar(20), verhicle int)");
+    db.exec(
+        "create table if not exists Park_spot (id integer primary key, taken "
+        "boolean, customer_id int)");
+    db.exec(
+        "create table if not exists Park_time (id integer primary key, "
+        "customer_id int, spot_id int, start int, end int, duration int)");
 
     return db;
 }
diff --git a/headers/Customer.h b/headers/Customer.h
index f235ed9..fb6e449 100644
--- a/headers/Customer.h
+++ b/headers/Customer.h
@@ -1,37 +1,35 @@
 #ifndef CUSTOMER_H
 #define CUSTOMER_H
 #pragma once
-#include "../thirdparty/SQLiteCpp/include/SQLiteCpp/SQLiteCpp.h"
+
 #include "Park_time.h"
-#include <ctime>
+#include "data.h"
+
 #include <random>
-#include <string>
 #include <vector>
 
-using std::string;
 using std::vector;
 
-// enum type is basically een manier om categories te representen als een integer in the background, maar om t in code
-// aan te geven als de actual category.
-enum class Verhicle_type {
-    small = 1,
-    medium = 2,
-    large = 3,
-};
+// will make it easy to represent it in the database while making it easy to use
+// while programming
+enum class Verhicle_type { bike = 1, small_car = 2, suv = 3, pickup = 4 };
 
 /*
-card code is een randomly generated string moeten zijn, die je bv. op een nfc card zou opslaan en zo zou
-authenticaten bij je parking spot. We kunnen dit ipv of samen met een password gebruiken.
-clock in en out creeert en compleet een park_time object. Voegt het toe aan een vector.
+card code is een randomly generated string moeten zijn, die je bv. op een nfc
+card zou opslaan en zo zou authenticaten bij je parking spot. We kunnen dit ipv
+of samen met een password gebruiken. clock in en out creeert en compleet een
+park_time object. Voegt het toe aan een vector.
 
 */
 
 class Customer {
   public:
-    Customer(string name_, Verhicle_type verhicle_, SQLite::Database& db);
-    Customer(int id_, string name_, string card_code_, Verhicle_type verhicle_,
-             vector<Park_time> instances); // needed to construct from db
-    // potentially: add a destructor that calls update_db() before being destroyed
+    Customer(string name_, Verhicle_type verhicle_);
+    Customer(int id_, string name_, // needed to construct from db
+             string card_code_,
+             Verhicle_type verhicle_, // TODO: how init. p_time instances?
+             vector<Park_time> instances);
+    ~Customer();
     int id;
     string name;
     string card_code;
@@ -39,20 +37,18 @@ class Customer {
     void clock_in(int s_id);
     void clock_out(int s_id);
 
-    void update_db(SQLite::Database& database);
-    void delete_db(SQLite::Database& database);
+    void update_db();
+    void delete_db();
 
-    // void gen_weekly(); TODO: this
-    void gen_monthly();
+    void gen_monthly(); // remove, make it a function in data
 
   private:
     Verhicle_type verhicle;
     vector<Park_time> park_instances;
 
     string gen_cardcode();
-
-    void save_db(SQLite::Database& database);
-    int auto_increment_db(SQLite::Database& database);
+    void save_db();
+    int auto_increment_db();
 };
 
 #endif // CUSTOMER_H
\ No newline at end of file
diff --git a/headers/Park_spot.h b/headers/Park_spot.h
index 4085152..e5dc5d7 100644
--- a/headers/Park_spot.h
+++ b/headers/Park_spot.h
@@ -1,21 +1,33 @@
 #include "Customer.h"
 
-
 /*
 db representation:
 int id not null
 bool taken not null
 int customer_id (null) (many to one, foreign key, whatever)
 
-Dit representeert een parkeerplaats. Het heeft als internal state alleen dat t bezet is of niet.
+Dit representeert een parkeerplaats. Het heeft als internal state alleen dat t
+bezet is of niet.
 */
 
 class Park_spot {
-    public:
+  public:
     int id;
     bool taken;
-    Customer* parked; //TODO: think about memory management
-    Park_spot(int id_);
-    void clock(Customer* c_customer);
-    private:
+    Customer* parked;
+    Park_spot();
+    Park_spot(Customer* parked_, int id_, bool taken_);
+    ~Park_spot();
+    void
+    clock(Customer* c_customer);
+
+  private:
+    void
+    save_db();
+    void
+    update_db();
+    void
+    delete_db();
+    int
+    auto_increment_db();
 };
\ No newline at end of file
diff --git a/headers/Park_time.h b/headers/Park_time.h
index a98d9c8..49ab9ea 100644
--- a/headers/Park_time.h
+++ b/headers/Park_time.h
@@ -2,43 +2,44 @@
 #define PARK_TIME_H
 #pragma once
 
-#include <chrono>
-#include <iostream>
+#include "data.h"
 
+#include <chrono>
+#include <ctime>
+#include <iostream>
+#include <string>
 
 using namespace std::chrono;
-
+using std::cout;
+using std::string;
+using std::to_string;
 /*
-db repr of Park_time
-int id (not null, auto increment)
-int customer_id (not null) (many to one or something like that)
-int spot_id (not null, many to one or something like that)
-int duration 
-datetime start (not null)
-datetime end
 
-Dit is gewoon een record van hoe lang, wie en waar iemand parkeert. Basically, een component van 
-de internal state van customer.
+
+Record of who parked at what park_spot and at what time.
 */
 
 class Park_time {
-public:
+  public:
+    Park_time(int c_id, int s_id);
+    Park_time(int id_, int customer_id_, int spot_id_, int start_,
+              int duration_);
+    ~Park_time();
     int id;
     int customer_id;
     int spot_id;
     int duration;
-    Park_time(int c_id, int s_id);
-    void clock_out(int c_id, int s_id);
-    friend std::ostream& operator<<(std::ostream& os, const  Park_time & pt);
-    void debug();
 
-private:
+    void clock_out(int c_id, int s_id);
+    friend std::ostream& operator<<(std::ostream& os, const Park_time& pt);
+
+  private:
     high_resolution_clock::time_point start;
     high_resolution_clock::time_point end;
-    //TODO: discuss pros cons of using chrono, ctime, or 3th party lib
+    void save_db();
+    void update_db();
+    int auto_increment_db(); // helper
+    int start_to_int();      // helper
 };
 
-
-
-
 #endif // Park_time
\ No newline at end of file
diff --git a/headers/data.h b/headers/data.h
index 5595cdf..2684f60 100644
--- a/headers/data.h
+++ b/headers/data.h
@@ -1,6 +1,12 @@
+#ifndef DATA_H
+#define DATA_H
+#pragma once
 #include "../thirdparty/SQLiteCpp/include/SQLiteCpp/SQLiteCpp.h"
-#include "Customer.h"
 namespace data {
-SQLite::Database start_db();
+SQLite::Database
+start_db();
+static SQLite::Database db = start_db();
 
-}
+} // namespace data
+
+#endif
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index cc0b796..0c03f7f 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,8 +1,6 @@
 #include "headers/Park_spot.h"
-#include "headers/data.h"
-#include <iostream>
-#include <thread> // to make pausing work, not sure if i need chrono, or this, or both
-#include <vector>
+
+#include <thread>
 
 /*
 Code strucure like this:
@@ -19,7 +17,8 @@ record die zegt dat een customer voor x tijd geparkeert heeft bij spot x, enz.
 De client clockt in en uit bij een spot.
  */
 
-void Wait(int sec)
+void
+Wait(int sec)
 /*
 a wait function where 1 sec represents 1 hour irl.
  */
@@ -27,14 +26,14 @@ a wait function where 1 sec represents 1 hour irl.
     std::this_thread::sleep_for(seconds{sec});
 }
 
-using std::cout;
-
-int main() {
-
-    SQLite::Database db = data::start_db();
-    // see implementation of update_db, save_db and delete_db of customer to see how queries and statements work
-    Customer sagar{"Sagar Winston Ramsaransing", Verhicle_type::medium, db};
-    sagar.update_db(db);
-    cout << "THIS WRKS";
-    // sagar.delete_db(db);
+int
+main() {
+    class Customer sagar {
+        "Sagar Ramsaransing", Verhicle_type::bike
+    };
+    sagar.update_db();
+    Park_spot p1;
+    p1.clock(&sagar);
+    Wait(2);
+    // p1.clock(&sagar);
 }
diff --git a/test.db3 b/test.db3
index 10a2d99..794b7ed 100644
Binary files a/test.db3 and b/test.db3 differ