use std::path::Path;
use std::{env, path::PathBuf};

use tokio::fs;

use crate::error::AppResult;
use crate::task::base_task::ALL_BASE_TASKS;

const DEFAULT_CONFIG_DIR: &str = "/etc";

lazy_static::lazy_static! {
    pub static ref CFG_PATH: PathBuf = env::var("TRM_CFG_PATH").map(PathBuf::from).unwrap_or_else(|_| PathBuf::from(DEFAULT_CONFIG_DIR).join("tourmaline"));
}

pub async fn generate_script_files<P: AsRef<Path>>(output: P) -> AppResult<()> {
    let output = output.as_ref();

    for task in &*ALL_BASE_TASKS {
        let key_data = task.key_data();
        let name = key_data.task_name;
        let script_dir = output.join(name);

        if !script_dir.exists() {
            fs::create_dir_all(&script_dir).await?;
        }
        let up_path = output.join("up.nu");
        let down_path = output.join("down.nu");

        fs::write(
            &up_path,
            format!(
                r#"# Applies all system changes of `{name}`
def main [cfg] {{
    echo "Executing up task `{name}` with config" $cfg
}}
"#
            ),
        )
        .await?;

        fs::write(
            &down_path,
            format!(
                r#"# Reverts all system changes of `{name}`
def main [cfg] {{
    echo "Executing up task `{name}` with config" $cfg
}}
"#
            )
            .trim(),
        )
        .await?;
    }

    Ok(())
}