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use anyhow::Context;
use keyring::Keyring;
use std::{env, fmt::Debug};

#[cfg(test)]
use std::sync::Once;

mod client;
mod git;
mod pulls;
mod repositories;
mod teams;
mod users;

pub use client::*;
pub use git::*;
pub use pulls::*;
pub use repositories::*;
pub use teams::*;
pub use users::*;

#[cfg(test)]
static LOG: Once = Once::new();

#[cfg(test)]
fn log() {
    LOG.call_once(|| jacklog::init(Some(&"debug")).unwrap());
}

#[cfg(test)]
fn handle() -> String {
    env::var("GITHUB_HANDLE").expect("error reading GITHUB_HANDLE")
}

#[cfg(test)]
fn org() -> String {
    env::var("GITHUB_TEST_ORG").expect("error reading GITHUB_TEST_ORG")
}

#[cfg(test)]
fn repo() -> String {
    env::var("GITHUB_TEST_REPO").expect("error reading GITHUB_TEST_REPO")
}

#[cfg(test)]
fn client() -> GithubClient {
    GithubClient::new(&EnvironmentProvider::default()).unwrap()
}

#[derive(Debug)]
pub struct AuthToken(String);

#[derive(Debug, Default)]
pub struct EnvironmentProvider {
    pub token_env_var: Option<String>,
    token: String,
}

#[derive(Debug)]
pub struct KeychainProvider {
    service: String,
    name: String,
}

impl Default for KeychainProvider {
    fn default() -> Self {
        Self {
            service: "buhtig".into(),
            name: "github-token".into(),
        }
    }
}

impl KeychainProvider {
    pub fn new<T: AsRef<str>>(service: Option<T>, name: Option<T>) -> Self {
        Self {
            service: match service {
                Some(s) => s.as_ref().to_string(),
                None => "buhtig".to_string(),
            },
            name: match name {
                Some(n) => n.as_ref().to_string(),
                None => "github-token".to_string(),
            },
        }
    }
}

pub trait CredentialsProvider {
    fn token(&self) -> String;
}

impl CredentialsProvider for AuthToken {
    fn token(&self) -> String {
        self.0.clone()
    }
}

impl CredentialsProvider for EnvironmentProvider {
    fn token(&self) -> String {
        // TODO: Get rid of this awful ownership hack clone.
        let var = self
            .token_env_var
            .clone()
            .unwrap_or_else(|| "GITHUB_TOKEN".to_string());

        env::var(&var).context(format!("{} not set", var)).unwrap()
    }
}

impl CredentialsProvider for KeychainProvider {
    fn token(&self) -> String {
        Keyring::new(&self.service, &self.name)
            .get_password()
            .expect("missing github token in keyring")
    }
}

#[derive(Debug)]
pub enum SortDirection {
    Asc,
    Desc,
}