use std::{fs, process};
use std::path::{Path, PathBuf};
use std::io::{self, Write};
use colored::Colorize;


pub fn init() {
    let ventodir: PathBuf = env_config();
    
    if ventodir.is_dir() {
        let mut answer = String::new();
        print!("⚠️  {} {}", format!("WARNING:").bold().red(), "Vento has already been initialized. Reinitializing will delete all files on the directory for Vento. Do you wish to proceed? (y/N) ");
        let _ = io::stdout().flush();
        io::stdin()
            .read_line(&mut answer)
            .expect("❌ Failed to read input");
        match answer.as_str().trim() {
            "y" | "Y" => {fs::remove_dir_all(&ventodir).expect("❌ Vento was unable to initalize. Do you have the correct permissions?");},
            "n" | "N" | _ => process::exit(0)
        };
    };
    
    create_slots(ventodir);
}

pub fn list(slot: &str) {
    let ventodir: PathBuf = env_config();
    let active: PathBuf = [ventodir.to_path_buf(), Path::new("active").to_path_buf()].iter().collect();
    let inactive: PathBuf = [ventodir.to_path_buf(), Path::new("inactive").to_path_buf()].iter().collect();
    let slotdir: PathBuf;

    match slot {
        "inactive" => slotdir = inactive,
        "active" | _ => slotdir = active
    };
    println!("🗃️  {}", format!("Files in {} inventory:", match slot {
        "active" => format!("{}", slot).bold(),
        "inactive" | _ => format!("{}", slot).blue().bold()
    }).green());
    for file in fs::read_dir(&slotdir).unwrap() {
       println!("- {}", file.unwrap().path().file_name().unwrap().to_os_string().into_string().unwrap());
    };
}

pub fn switch() {
    let ventodir: PathBuf = env_config();
    let active: PathBuf = [ventodir.to_path_buf(), Path::new("active").to_path_buf()].iter().collect();
    let temp: PathBuf = [ventodir.to_path_buf(), Path::new("temp").to_path_buf()].iter().collect();
    let inactive: PathBuf = [ventodir.to_path_buf(), Path::new("inactive").to_path_buf()].iter().collect();
    
    fs::rename(&active, &temp).expect("❌ Vento was unable to switch slots. Try running vento init and try again");
    fs::rename(&inactive, &active).expect("❌ Vento was unable to switch slots. Try running vento init and try again");
    fs::rename(&temp, &inactive).expect("❌ Vento was unable to switch slots. Try running vento init and try again");

    println!("🎉 {}", format!("Switched inventory slots!").green());
}

fn env_config() -> PathBuf {
    let emptypath = PathBuf::new();
    let home = match dirs::home_dir() {
        Option::Some(dir) => dir,
        _ => PathBuf::new()
    };
    if home == emptypath {
        println!("❌ {}", format!("Vento was unable to detect your home folder. Have you configured your environment correctly?").red());
        process::exit(0);
    } else {
        return [home, Path::new(".vento").to_path_buf()].iter().collect();
    };
}

fn create_slots(dir: PathBuf) {
    let active: PathBuf = [dir.to_path_buf(), Path::new("active").to_path_buf()].iter().collect();
    let inactive: PathBuf = [dir.to_path_buf(), Path::new("inactive").to_path_buf()].iter().collect();

    fs::create_dir_all(active).expect("❌ Vento was unable to initalize. Do you have the correct permissions?");
    fs::create_dir_all(inactive).expect("❌ Vento was unable to initalize. Do you have the correct permissions?");

    println!("🎉 {}", format!("Vento has been succesfully initialized!").green());
}