use clap::Parser;
use std::{error::Error, path::PathBuf, process::Command};
use tempfile::TempPath;
use walkdir::WalkDir;

use crate::{
    art::{ArtArgs, add_art, is_flac},
    convert::{ToAacArgs, convert_to_aac},
};

mod art;
mod convert;

type Rail = Result<(), Box<dyn Error + Send + Sync>>;

#[derive(Parser, Debug)]
#[command(name = "podtools")]
#[command(bin_name = "podtools")]
enum AllCli {
    /// Convert FLACs to AAC
    ToAac(ToAacArgs),

    /// Apply iPod-safe album art to AAC files
    Art(ArtArgs),

    /// FLAC to AAC, Album Art, Import
    TheWorks(TheWorksArgs),
}

#[derive(clap::Args, Debug)]
#[command(version, about, long_about = None)]
pub struct TheWorksArgs {
    #[arg(long)]
    cover: PathBuf,

    path: PathBuf,
}

fn main() -> Rail {
    match AllCli::parse() {
        AllCli::ToAac(to_aac_args) => convert_to_aac(to_aac_args)?,
        AllCli::Art(args) => add_art(args)?,
        AllCli::TheWorks(args) => {
            println!("The works #1: Convert to AAC.");
            convert_to_aac(ToAacArgs {
                replace: false,
                no_metadata: false,
                recursive: true,
                path: args.path.clone(),
            })?;

            println!("The works #2: Add art.");
            add_art(ArtArgs {
                recursive: true,
                cover: args.cover,
                path: args.path.clone(),
            })?;

            println!("The works #3: Import AACs into iTunes.");
            let walker = WalkDir::new(&args.path);
            let files: Result<Vec<_>, _> = walker.into_iter().filter_entry(is_flac).collect();
            let files = files?;

            if files.is_empty() {
                return Err("No files".into());
            }

            for file in files {
                if file.file_type().is_file() {
                    Command::new("open")
                        .args(["-a", "Music"])
                        .arg(file.path())
                        .output()?;
                }
            }
            println!("Job done.");
        }
    }

    Ok(())
}

pub fn temp_file(suffix: Option<&str>) -> TempPath {
    tempfile::Builder::new()
        .suffix(suffix.unwrap_or(""))
        .tempfile()
        .unwrap()
        .into_temp_path()
}