use std::path::PathBuf;

use anyhow::{anyhow, Context, Result};
use clap::Parser;

use crate::{paths::Paths, spec::Spec};

#[derive(Parser)]
#[command(author, version, about, long_about = None)]
pub(crate) struct Cli {
    /// Path to the directory it should operate on. Defaults to the current working directory.
    #[arg(value_name = "DIR")]
    pub(crate) path: Option<PathBuf>,
}

pub(crate) fn setup() -> Result<(Paths, Spec)> {
    let cli = Cli::parse();
    let base_dir = cli
        .path
        .ok_or_else(|| anyhow!("No path specified in CLI parameters."))
        .or_else(|_| std::env::current_dir())
        .context(
            "Couldn't get current dir from env, and no path was specified in CLI parameters either",
        )?;
    let paths = Paths::new(base_dir);
    let spec_string =
        std::fs::read_to_string(&paths.spec).context("Failed to read spec into string")?;
    let spec: Spec =
        serde_yaml::from_str(&spec_string).context("Failed to parse spec from string")?;
    Ok((paths, spec))
}