use std::fmt::{Display, Formatter};

use serde::Deserialize;
use terrors::OneOf;

use crate::filesystem::FileSystem;

#[derive(Debug, PartialEq, Eq, Deserialize)]
pub struct Config {
    forge_type: ForgeType,
    hostname: String,
    user: String,
    // API Token
    // Private SSH Key Path
}

#[derive(Debug, PartialEq, Eq, Deserialize)]
pub enum ForgeType {
    ForgeJo,
    // Gitea,
    // GitHub,
    // GitLab,
    // BitBucket,
}
impl Display for ForgeType {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        write!(f, "{:?}", self)
    }
}

#[allow(dead_code)]
impl Config {
    pub(crate) fn load(fs: &FileSystem) -> Result<Self, OneOf<(std::io::Error, toml::de::Error)>> {
        let str = fs.read_file("git-next-server.toml").map_err(OneOf::new)?;
        toml::from_str(&str).map_err(OneOf::new)
    }
    pub const fn forge_type(&self) -> &ForgeType {
        &self.forge_type
    }
    pub fn hostname(&self) -> &str {
        self.hostname.as_str()
    }
    pub fn user(&self) -> &str {
        self.user.as_str()
    }
}

#[cfg(test)]
mod tests {
    use crate::filesystem::FileSystem;

    use super::*;

    #[test]
    fn test_config_load() -> Result<(), OneOf<(std::io::Error, toml::de::Error)>> {
        let fs = FileSystem::new_temp().map_err(OneOf::new)?;
        fs.write_file(
            "git-next-server.toml",
            r#"
            forge_type = "ForgeJo"
            hostname = "git.example.net"
            user = "Bob"
        "#,
        )
        .map_err(OneOf::new)?;
        let config = Config::load(&fs)?;
        assert_eq!(config.forge_type(), &ForgeType::ForgeJo);
        assert_eq!(config.hostname(), "git.example.net".to_string());
        assert_eq!(config.user(), "Bob".to_string());

        Ok(())
    }
}