use std::{
    fs::File,
    io::{Read, Write},
};

use serde::{Deserialize, Serialize};

use crate::error::MLE;

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Cfg {
    pub data: String,
    pub cache: String,
    pub apis: Apis,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Apis {
    pub modrinth: String,
}

impl Cfg {
    pub fn init(path: Option<String>) -> MLE<Self> {
        let configfile = match path {
            Some(p) => String::from(p),
            None => dirs::config_dir().unwrap().join("modlist.toml").to_string_lossy().into(),
        };

        let mut file = match File::open(&configfile) {
            Ok(file) => file,
            Err(err) => {
                if err.kind() == std::io::ErrorKind::NotFound {
                    println!("No config file found, creating one");
                    let default_cfg = Cfg {
                        data: String::from("~/.cache/modlist/"),
                        cache: String::from("~/.cache/modlist/cache"),
                        apis: Apis {
                            modrinth: String::from("https://api.modrinth.com/v2/"),
                        },
                    };
                    let mut file = File::create(&configfile)?;
                    println!("Created config file");
                    file.write_all(toml::to_string(&default_cfg)?.as_bytes())?;
                    File::open(&configfile)?
                } else {
                    return Err(err.into());
                }
            }
        };
        let mut content = String::new();
        file.read_to_string(&mut content)?;
        let config = toml::from_str::<Cfg>(&content)?;
        Ok(config)
    }
}