use figment::{providers::Serialized, value, Figment, Metadata, Profile, Provider};
use serde::{Deserialize, Serialize};
use std::path::PathBuf;

#[derive(Debug, PartialEq, Eq, Clone, Default, Serialize, Deserialize)]
pub struct Config {
    pub(crate) paths: Vec<PathEntry>,
}

impl Config {
    pub fn from<T: Provider>(provider: T) -> figment::error::Result<Config> {
        Figment::from(provider).extract()
    }
}

impl Provider for Config {
    fn metadata(&self) -> Metadata {
        Metadata::named("Tmuxr path config")
    }

    fn data(&self) -> figment::error::Result<value::Map<Profile, value::Dict>> {
        Serialized::defaults(Config::default()).data()
    }
}

#[derive(Debug, PartialEq, Eq, Clone, Default, Serialize, Deserialize)]
pub struct PathEntry {
    pub path: PathBuf,
    pub hidden: bool,
    pub recurse: Option<usize>,
}

impl std::str::FromStr for PathEntry {
    type Err = std::convert::Infallible;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        Ok(PathEntry {
            path: s.to_string().into(),
            ..Default::default()
        })
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use figment::providers::{Format, Serialized, Toml};

    #[test]
    fn defaults() {
        figment::Jail::expect_with(|jail| {
            jail.create_file(
                "tmuxr.toml",
                r#"
                paths = []
                "#,
            )?;

            let config: Config = Figment::from(Serialized::defaults(Config::default()))
                .merge(Toml::file("tmuxr.toml"))
                .extract()?;

            assert_eq!(config, Config::default());

            Ok(())
        });
    }

    #[test]
    fn custom() {
        figment::Jail::expect_with(|jail| {
            jail.create_file(
                "tmuxr.toml",
                r#"
                paths = [
                    "/tmp/projects",
                    { path = "/tmp/tmuxr/test/other_projects", recursive = false, hidden = true },
                ]
                "#,
            )?;

            let config: Config = Figment::from(Serialized::defaults(Config::default()))
                .merge(Toml::file("tmuxr.toml"))
                .extract()?;

            assert_eq!(
                config,
                Config {
                    paths: Vec::from([
                        PathEntry {
                            path: "/tmp/tmuxr/test/project_1".into(),
                            hidden: false,
                            recurse: None,
                        },
                        PathEntry {
                            path: "/tmp/tmuxr/test/projects".into(),
                            hidden: false,
                            recurse: Some(1),
                        }
                    ]),
                }
            );

            Ok(())
        });
    }
}