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

use anyhow::{bail, Context, Result};
use directories::ProjectDirs;
use dotenv::from_path;

const CONFIG_FILE_NAME: &str = ".env";

pub fn get_config_dirs() -> Vec<PathBuf> {
    let mut config_dirs = vec![
        PathBuf::from(""), // Current directory
    ];
    if let Ok(manifest_dir) = env::var("CARGO_MANIFEST_DIR") {
        config_dirs.push(PathBuf::from(manifest_dir));
    }
    if let Some(proj_dirs) = ProjectDirs::from("org", "P4pillon", "Krys4lide") {
        config_dirs.push(proj_dirs.config_dir().to_path_buf());
    }
    config_dirs
}

pub fn get_config_files() -> Result<Vec<PathBuf>> {
    let config_dirs = get_config_dirs();
    let mut config_files = Vec::new();
    for config_dir in config_dirs.iter() {
        let config_file = config_dir.join(CONFIG_FILE_NAME);
        if config_file.exists() {
            config_files.push(config_file);
        }
    }
    if config_files.is_empty() {
        bail!(
            "No config file {CONFIG_FILE_NAME} found in the following directories: {config_dirs:#?}"
        );
    }
    Ok(config_files)
}

pub fn load_config() -> Result<()> {
    let config_files = get_config_files()?;
    // Load the first config file found
    // TODO: add a verbose log to list all config files found
    println!(
        "DEBUG: Config files found (1st loaded): {:#?}",
        config_files
    );
    from_path(config_files[0].as_path()).context("Failed to load config file")
}