use std::{path, process::exit};

use clap::Parser;
use cli::CliArgs;
use rusqlite::Connection;

const DB_PATH: &str = ".tags";

mod cli;
mod tags;

fn main() {
	let args = CliArgs::parse();

	match args.commands {
		cli::Commands::Init => {
			if !has_database() {
				let conn = Connection::open(DB_PATH).unwrap();
				init_db(&conn);
			} else {
				panic!("Database is already initialized in this folder");
			}
			exit(0);
		}
		cli::Commands::Tag(args) => tags::handle_tag(args),
		cli::Commands::Tags(args) => tags::handle_tags(args),
		cli::Commands::Files(args) => tags::handle_files(args),
	}
}

fn init_db(conn: &Connection) {
	conn.execute(
		r#"CREATE TABLE IF NOT EXISTS tag(
			id INTEGER PRIMARY KEY AUTOINCREMENT, 
			name VARCHAR(255) NOT NULL UNIQUE
		);"#,
		(),
	)
	.unwrap();

	conn.execute(
		r#"CREATE TABLE IF NOT EXISTS file(
			id INTEGER PRIMARY KEY AUTOINCREMENT, 
			path VARCHAR(255) NOT NULL UNIQUE
		);"#,
		(),
	)
	.unwrap();

	conn.execute(
		r#"CREATE TABLE IF NOT EXISTS file_tag(
			tag_id INT REFERENCES tag(id), 
			file_id INT REFERENCES file(id)
		);"#,
		(),
	)
	.unwrap();
}

pub fn try_database() {
	if !has_database() {
		panic!("No database found! Use taggo init to create one first.");
	}
}

pub fn has_database() -> bool {
	path::Path::new(DB_PATH).exists()
}