use crate::AuthConfig;
use gix::bstr::BStr;
use semver::Version;
use serde::{Deserialize, Deserializer, Serializer};
use sha2::{Digest, Sha256};
use std::collections::{BTreeMap, HashSet};

pub fn authenticate_conn(
	conn: &mut gix::remote::Connection<
		'_,
		'_,
		Box<dyn gix::protocol::transport::client::Transport + Send>,
	>,
	auth_config: &AuthConfig,
) {
	if let Some(iden) = auth_config.git_credentials().cloned() {
		conn.set_credentials(move |action| match action {
			gix::credentials::helper::Action::Get(ctx) => {
				Ok(Some(gix::credentials::protocol::Outcome {
					identity: iden.clone(),
					next: gix::credentials::helper::NextAction::from(ctx),
				}))
			}
			gix::credentials::helper::Action::Store(_) => Ok(None),
			gix::credentials::helper::Action::Erase(_) => Ok(None),
		});
	}
}

pub fn serialize_gix_url<S: Serializer>(url: &gix::Url, serializer: S) -> Result<S::Ok, S::Error> {
	serializer.serialize_str(&url.to_bstring().to_string())
}

pub fn deserialize_gix_url<'de, D: Deserializer<'de>>(
	deserializer: D,
) -> Result<gix::Url, D::Error> {
	let s = String::deserialize(deserializer)?;
	gix::Url::from_bytes(BStr::new(&s)).map_err(serde::de::Error::custom)
}

pub fn deserialize_gix_url_map<'de, D: Deserializer<'de>>(
	deserializer: D,
) -> Result<BTreeMap<String, gix::Url>, D::Error> {
	BTreeMap::<String, String>::deserialize(deserializer)?
		.into_iter()
		.map(|(k, v)| {
			gix::Url::from_bytes(BStr::new(&v))
				.map(|v| (k, v))
				.map_err(serde::de::Error::custom)
		})
		.collect()
}

#[allow(dead_code)]
pub fn deserialize_gix_url_vec<'de, D: Deserializer<'de>>(
	deserializer: D,
) -> Result<Vec<gix::Url>, D::Error> {
	Vec::<String>::deserialize(deserializer)?
		.into_iter()
		.map(|v| gix::Url::from_bytes(BStr::new(&v)).map_err(serde::de::Error::custom))
		.collect()
}

pub fn deserialize_gix_url_hashset<'de, D: Deserializer<'de>>(
	deserializer: D,
) -> Result<HashSet<gix::Url>, D::Error> {
	HashSet::<String>::deserialize(deserializer)?
		.into_iter()
		.map(|v| gix::Url::from_bytes(BStr::new(&v)).map_err(serde::de::Error::custom))
		.collect()
}

pub fn deserialize_git_like_url<'de, D: Deserializer<'de>>(
	deserializer: D,
) -> Result<gix::Url, D::Error> {
	let s = String::deserialize(deserializer)?;
	if s.contains(':') {
		gix::Url::from_bytes(BStr::new(&s)).map_err(serde::de::Error::custom)
	} else {
		gix::Url::from_bytes(BStr::new(format!("https://github.com/{s}").as_bytes()))
			.map_err(serde::de::Error::custom)
	}
}

pub fn hash<S: AsRef<[u8]>>(struc: S) -> String {
	format!("{:x}", Sha256::digest(struc.as_ref()))
}

pub fn is_default<T: Default + Eq>(t: &T) -> bool {
	t == &T::default()
}

pub fn no_build_metadata(version: &Version) -> Version {
	let mut version = version.clone();
	version.build = semver::BuildMetadata::EMPTY;
	version
}