diff --git a/Cargo.toml b/Cargo.toml
index 391a7e5..49def5e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-argparse = "0.2.2"
+regex = "1"
 chrono = "0.4.19"
+clap = { version = "3.1.6", features = ["derive"] }
 rusqlite = { version="0.27.0", features=["chrono"] }
diff --git a/src/main.rs b/src/main.rs
index eb36fa6..fe087b4 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,128 +1,104 @@
-extern crate argparse;
+mod storage;
+mod utils;
 
-use argparse::{ArgumentParser, Store, StoreTrue};
-use chrono::{DateTime, Duration, Utc};
-use rusqlite::{params, Connection, Error};
+use chrono::{DateTime, Utc};
+use clap::{Parser, Subcommand};
+use regex::Regex;
+pub use storage::{open_sqlite_storage, Memo, MemoStorage};
+use utils::{parse_human_duration, HumanDisplay};
 
-struct Memo {
-	id: u32,
-	body: String,
-	due: DateTime<Utc>,
+#[derive(Parser)]
+#[clap(author, version, about, long_about = None)]
+#[clap(propagate_version = true, disable_colored_help = true)]
+#[clap(subcommand_required = false)]
+#[clap(disable_help_subcommand = true)]
+struct Cli {
+	#[clap(subcommand)]
+	command: Option<Commands>,
+
+	#[clap(short, long, help = "location for database file")]
+	db_path: Option<String>,
 }
 
-fn init_db(path: &str) -> Result<Connection, Error> {
-	let connection = Connection::open(path)?;
-
-	connection.execute(
-		"CREATE TABLE IF NOT EXISTS memo (
-			id INTEGER PRIMARY KEY,
-			body TEXT NOT NULL,
-			due DATETIME
-		);",
-		[],
-	)?;
-
-	return Ok(connection);
-}
-
-fn all(conn: Connection) -> Result<Vec<Memo>, rusqlite::Error> {
-	let mut statement = conn.prepare("SELECT * FROM memo ORDER BY due, id")?;
-	let mut rows = statement.query([])?;
-
-	let mut results = Vec::new();
-
-	while let Some(row) = rows.next()? {
-		results.push(Memo {
-			id: row.get(0)?,
-			body: row.get(1)?,
-			due: row.get(2)?,
-		});
-	}
-
-	return Ok(results);
-}
-
-pub trait PrettyPrint {
-	fn pretty(&self) -> String;
-}
-
-impl PrettyPrint for Duration {
-	fn pretty(&self) -> String {
-		if self.num_days().abs() > 400 {
-			return format!("{}y {}m", self.num_days().abs() / 365, (self.num_days() % (30*12)) / 30);
-		} else if self.num_days().abs() >= 365 {
-			return format!("{}y", self.num_days().abs() / 365);
-		} else if self.num_days().abs() >= 90 {
-			return format!("{}m", self.num_days().abs() / 30); // sort of
-		} else if self.num_days().abs() >= 1 {
-			return format!("{}d", self.num_days().abs());
-		} else if self.num_hours().abs() > 0 {
-			let h = self.num_minutes().abs() / 60;
-			let m = self.num_minutes().abs() % 60;
-			return format!("{}h {}min", h, m);
-		} else if self.num_minutes().abs() > 0 {
-			return format!("{}min", self.num_minutes().abs());
-		} else if self.num_seconds().abs() > 0 {
-			return format!("{}s", self.num_seconds().abs());
-		}
-		return self.to_string();
-	}
+#[derive(Subcommand)]
+enum Commands {
+	#[clap(trailing_var_arg = true)]
+	New {
+		#[clap(multiple_values = true)]
+		#[clap(min_values = 1)]
+		#[clap(required = true)]
+		body: Vec<String>,
+		#[clap(short, long, help = "due time relative to now")]
+		due: Option<String>,
+	},
+	Done {
+		search: String,
+		#[clap(long)]
+		many: bool,
+	},
+	Del {
+		id: u32,
+	},
 }
 
 fn main() {
+	let args = Cli::parse();
 	let home_path = std::env!("HOME").to_string();
-	if home_path.len() < 1 {
-		panic!("Cannot work without a home folder");
-	}
-
-	let mut version = false;
-	let mut memo: String = "".to_string();
 	let mut db_path: String = home_path + "/.local/share/memo-cli.db";
 
-	{
-		// this block limits scope of borrows by ap.refer() method
-		let mut ap = ArgumentParser::new();
-		ap.set_description("A simple tool to remember things");
-		ap.refer(&mut version).add_option(
-			&["-V", "--version"],
-			StoreTrue,
-			"Show current version and die",
-		);
-		ap.refer(&mut memo)
-			.add_option(&["-n", "--new"], Store, "Add a new memo");
-		ap.refer(&mut db_path)
-			.add_option(&["--path"], Store, "Specify db path");
-
-		ap.parse_args_or_exit();
+	if let Some(db) = args.db_path {
+		db_path = db;
 	}
 
-	if version {
-		const VERSION: &str = env!("CARGO_PKG_VERSION");
-		println!("memo-cli v{}", VERSION);
-		return;
-	}
+	let storage = open_sqlite_storage(&db_path).unwrap();
 
-	let connection =
-		init_db(&db_path).unwrap_or_else(|err| panic!("Could not open db : {}", err.to_string()));
-
-	if memo.len() > 0 {
-		connection
-			.execute(
-				"INSERT INTO memo (body, due) VALUES (?, ?)",
-				params![memo, Utc::now()],
-			)
-			.unwrap_or_else(|err| panic!("Could not insert into db : {}", err.to_string()));
-		println!("New memo : '{}'", memo);
-	} else {
-		let zero_duration = Duration::seconds(0);
-		let memos = all(connection)
-			.unwrap_or_else(|err| panic!("Could not read all  memos : {}", err.to_string()));
-		for m in memos {
-			let delta = m.due - Utc::now();
-			if delta.le(&zero_duration) {
-				println!("[*] {} : +{} \t[{}]", m.body, delta.pretty(), m.id);
+	match args.command {
+		Some(Commands::New { body, due }) => {
+			let mut due_date: Option<DateTime<Utc>> = None;
+			if let Some(d) = due {
+				if d.len() > 0 {
+					due_date = Some(Utc::now() + parse_human_duration(d.as_str()).unwrap());
+				}
+			}
+			let txt = body.join(" ");
+			storage.add(txt.as_str(), due_date).unwrap();
+			println!("new memo: '{}'", txt);
+		}
+		Some(Commands::Done { search, many }) => {
+			let rex = Regex::new(search.as_str());
+			let mut found = false;
+			let mut to_remove: Option<Memo> = None;
+			if let Some(re) = rex.ok() {
+				for memo in storage.all().unwrap() {
+					if re.is_match(memo.body.as_str()) {
+						if many {
+							storage.del(memo.id).unwrap();
+							println!("[-] task #{} done", memo.id);
+						} else if found {
+							println!("[!] would remove multiple tasks");
+							to_remove = None;
+							break;
+						} else {
+							to_remove = Some(memo);
+							found = true;
+						}
+					}
+				}
+				if let Some(rm) = to_remove {
+					storage.del(rm.id).unwrap();
+					println!("[-] task #{} done", rm.id);
+				}
 			} else {
-				println!(" *  {} : -{} \t[{}]", m.body, delta.pretty(), m.id);
+				println!("[!] invalid regex");
+			}
+		}
+		Some(Commands::Del { id }) => {
+			storage.del(id).unwrap();
+			println!("[-] task #{} deleted", id);
+		}
+		None => {
+			for m in storage.all().unwrap() {
+				println!("{}", m.human());
 			}
 		}
 	}
diff --git a/src/storage.rs b/src/storage.rs
new file mode 100644
index 0000000..ce97ca0
--- /dev/null
+++ b/src/storage.rs
@@ -0,0 +1,107 @@
+use chrono::{DateTime, Utc};
+use rusqlite::{params, Connection, Error};
+use std::fmt;
+
+pub struct Memo {
+	pub id: u32,
+	pub body: String,
+	pub due: Option<DateTime<Utc>>,
+}
+
+impl fmt::Display for Memo {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		let mut due_str = "null".to_string();
+		if self.due.is_some() {
+			due_str = self.due.unwrap().to_string();
+		}
+		return write!(
+			f,
+			"Memo(id={id}, body={body}, due={due})",
+			id = self.id,
+			body = self.body,
+			due = due_str,
+		);
+	}
+}
+
+pub trait MemoStorage {
+	fn all(&self) -> Result<Vec<Memo>, Error>;
+	fn add(&self, body: &str, due: Option<DateTime<Utc>>) -> Result<(), Error>;
+	fn del(&self, id: u32) -> Result<bool, Error>;
+	fn get(&self, id: u32) -> Result<Memo, Error>;
+}
+
+// SQLiteStorage
+
+pub struct SQLiteStorage {
+	conn: Connection,
+}
+
+pub fn open_sqlite_storage(path: &str) -> Result<SQLiteStorage, Error> {
+	let connection = Connection::open(path)?;
+	// TODO check if table exist and is valid
+	connection.execute(
+		"CREATE TABLE IF NOT EXISTS memo (
+			id INTEGER PRIMARY KEY,
+			body TEXT NOT NULL,
+			due DATETIME
+		);",
+		[],
+	)?;
+	return Ok(SQLiteStorage { conn: connection });
+}
+
+impl MemoStorage for SQLiteStorage {
+	fn all(&self) -> Result<Vec<Memo>, Error> {
+		let mut statement = self.conn.prepare("SELECT * FROM memo ORDER BY due, id")?;
+		let mut rows = statement.query([])?;
+		let mut results = Vec::new();
+
+		while let Some(row) = rows.next()? {
+			results.push(Memo {
+				id: row.get(0)?,
+				body: row.get(1)?,
+				due: row.get(2)?,
+			});
+		}
+
+		return Ok(results);
+	}
+
+	fn add(&self, body: &str, due: Option<DateTime<Utc>>) -> Result<(), Error> {
+		// TODO join these 2 ifs?
+		if due.is_some() {
+			self.conn.execute(
+				"INSERT INTO memo (body, due) VALUES (?, ?)",
+				params![body, due],
+			)?;
+		} else {
+			self.conn
+				.execute("INSERT INTO memo (body) VALUES (?)", params![body])?;
+		}
+		return Ok(());
+	}
+
+	fn del(&self, id: u32) -> Result<bool, Error> {
+		let count = self
+			.conn
+			.execute("DELETE FROM memo WHERE id = ?", params![id])?;
+		if count > 0 {
+			return Ok(true);
+		} else {
+			return Ok(false);
+		}
+	}
+
+	fn get(&self, id: u32) -> Result<Memo, Error> {
+		return Ok(self
+			.conn
+			.query_row("SELECT * FROM memo WHERE id = ?", params![id], |row| {
+				return Ok(Memo {
+					id: row.get(0)?,
+					body: row.get(1)?,
+					due: row.get(2).unwrap_or(None),
+				});
+			})?);
+	}
+}
diff --git a/src/utils.rs b/src/utils.rs
new file mode 100644
index 0000000..cf0813a
--- /dev/null
+++ b/src/utils.rs
@@ -0,0 +1,82 @@
+use crate::storage::Memo;
+use chrono::{Duration, Utc};
+use regex::{Error, Regex};
+
+pub trait HumanDisplay {
+	fn human(&self) -> String;
+}
+
+impl HumanDisplay for Duration {
+	fn human(&self) -> String {
+		if self.num_days().abs() > 400 {
+			return format!(
+				"{}y {}m",
+				self.num_days().abs() / 365,
+				(self.num_days() % (30 * 12)) / 30
+			);
+		} else if self.num_days().abs() >= 365 {
+			return format!("{}y", self.num_days().abs() / 365);
+		} else if self.num_days().abs() >= 90 {
+			return format!("{}m", self.num_days().abs() / 30); // sort of
+		} else if self.num_days().abs() >= 1 {
+			return format!("{}d", self.num_days().abs());
+		} else if self.num_hours().abs() > 0 {
+			let h = self.num_minutes().abs() / 60;
+			let m = self.num_minutes().abs() % 60;
+			return format!("{}h {}min", h, m);
+		} else if self.num_minutes().abs() > 0 {
+			return format!("{}min", self.num_minutes().abs());
+		} else if self.num_seconds().abs() > 0 {
+			return format!("{}s", self.num_seconds().abs());
+		}
+		return self.to_string();
+	}
+}
+
+impl HumanDisplay for Memo {
+	fn human(&self) -> String {
+		if self.due.is_some() {
+			let delta = self.due.unwrap() - Utc::now();
+			if delta.le(&Duration::seconds(0)) {
+				return format!("[*] {} (+{})", self.body, delta.human());
+			} else {
+				return format!(" *  {} (-{})", self.body, delta.human());
+			}
+		} else {
+			return format!(" *  {}", self.body);
+		}
+	}
+}
+
+pub fn parse_human_duration(input: &str) -> Result<Duration, Error> {
+	let mut secs: i64 = 0;
+	println!("{}", input);
+
+	for (token, mult) in [("d", 60 * 60 * 24), ("h", 60 * 60), ("m", 60)] {
+		let re = Regex::new(format!("((?:-|)[0-9]+){token}", token = token).as_str())?;
+		if let Some(captures) = re.captures(input) {
+			if let Some(cap) = captures.get(1) {
+				secs += mult * cap.as_str().parse::<i64>().unwrap(); // safely unwrap because regex gave only digits
+			}
+		}
+	}
+
+	return Ok(Duration::seconds(secs));
+}
+
+// TODO is it possible to make this a method?
+pub fn vec_to_str<T: std::fmt::Display>(arr: &Vec<T>) -> String {
+	let mut out = String::default();
+	let mut first = true;
+	out += "[";
+	for el in arr {
+		if !first {
+			out += ",";
+		}
+		out += " ";
+		out += el.to_string().as_mut_str();
+		first = false;
+	}
+	out += " ]";
+	return out;
+}