mod git;
mod ite;

use actix_web::{get, post, web, App, HttpResponse, HttpServer, Responder, Error, HttpRequest};
use askama_actix::Template;
use actix_session::{Session, CookieSession};
use actix_web_httpauth::headers::authorization::{Authorization, Basic};
use actix_web::http::header::Header;
use actix_web_httpauth::middleware::HttpAuthentication;
use actix_web::dev::ServiceRequest;
use actix_web_httpauth::extractors::basic::{BasicAuth, Config};
use actix_web_httpauth::extractors::AuthenticationError;
use crate::git::{GitBrowseEntry, GitRepo, GitCommit, GitBrowseDir};
use actix_web::middleware::Logger;
use env_logger::Env;
use crate::ite::SuperIterator;
use std::ops::Add;
use std::path::{PathBuf, Path};

#[derive(Template)]
#[template(path = "hello.html")]
struct HelloTemplate<'a> {
    name: &'a str,
}

struct User {
    name : String,
}

struct Owner {
    name : String,
}

struct Repository {
    name : String,
    owner : Owner,
}

#[derive(Template)]
#[template(path = "git.html")]
struct GitMainTemplate<TS, ROOT>
where for <'a> &'a TS : IntoIterator<Item = &'a GitBrowseEntry>,
      for <'a> &'a ROOT : IntoIterator<Item = &'a (String, String)>,
{
    repo : Repository,
    browse : TS,
    root : ROOT,
    user_opt : Option<User>,
}

#[get("/")]
async fn hello() -> impl Responder {
    HttpResponse::Ok().body("Bonjour monde !")
}

#[get("/test")]
async fn hello_test() -> impl Responder {
    HttpResponse::Ok().body("Coucou")
}

#[get("/askama")]
async fn askama() -> impl Responder {
    let name : &str = "world";
    HelloTemplate { name }
}

#[get("/session")]
async fn hello_session(session : Session) -> impl Responder {
    // session.renew();
    match session.set("VieuxVy", 1) {
        Ok(_) => HttpResponse::Ok().body("Coucou\r\n"),
        Err(e) => HttpResponse::BadGateway().body("fail\r\n"),
    }

}

// #[get("/auth")]
async fn hello_auth(req : HttpRequest) -> impl Responder {
    match Authorization::<Basic>::parse(&req){
        Ok(auth) => HttpResponse::Ok().body(format!("Hello, {}!", auth.as_ref().user_id())),
        Err(e) => HttpResponse::Unauthorized().body("forbidden")
    }
}

#[get("/git/{owner}/{repo}/{commit}/{path:.*}")]
async fn git_main(web::Path((owner, reponame, commitname, rootname)): web::Path<(String, String, String, String)>) -> impl Responder {
    let repo = GitRepo::new();
    let path : Vec<(String, String)> = rootname.split("/").map_accum("/git/".to_string() + &owner + "/" + &reponame + "/" + &commitname, |str_ref, b| {
        let href = b + "/" + str_ref;
        ((str_ref.to_string(), href.clone()), href)
    }).collect();
    let commit = GitCommit::new(commitname);
    let root = GitBrowseDir::new(rootname);
    let browse = repo.browse(&commit, &root).await;
    let owner = Owner { name : owner};
    let repo = Repository {name : reponame, owner};
    let user = User { name : "Hubert".to_string()};
    GitMainTemplate { repo, browse : browse, root : path, user_opt : Some(user)}
}

#[post("/echo")]
async fn echo(req_body: String) -> impl Responder {
    HttpResponse::Ok().body(req_body)
}

async fn manual_hello() -> impl Responder {
    HttpResponse::Ok().body("Hey there!\r\n")
}

#[get("/{id}/{name}/index.html")]
async fn index(web::Path((id, name)): web::Path<(u32, String)>) -> impl Responder {
    format!("Hello {}! id:{}", name, id)
}

async fn basic_auth_validator(req: ServiceRequest, credentials: BasicAuth) -> Result<ServiceRequest, Error> {
    let config = req
        .app_data::<Config>()
        .map(|data| data.clone())
        .unwrap_or_else(Default::default);
    match validate_credentials(credentials.user_id(), credentials.password().map(|s| s.trim())) {
        Ok(res) => {
            if res == true {
                Ok(req)
            } else {
                Err(AuthenticationError::from(config).into())
            }
        }
        Err(_) => Err(AuthenticationError::from(config).into()),
    }
}

fn validate_credentials(user_id: &str, user_password: Option<&str>) -> Result<bool, std::io::Error>
{
    if user_id.eq("karl") && user_password.eq(&Option::Some("password")) {
        return Ok(true);
    }
    return Err(std::io::Error::new(std::io::ErrorKind::Other, "Authentication failed!"));
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    std::env::set_var("RUST_LOG", "actix_web=info");
    env_logger::from_env(Env::default().default_filter_or("info")).init();
    HttpServer::new(|| {
        let auth = HttpAuthentication::basic(basic_auth_validator);
        App::new()
            .wrap(Logger::default())
            // .wrap(Logger::new("%a %{User-Agent}i"))
            .wrap(CookieSession::signed(&[0; 32]).secure(false))
            .service(hello)
            .service(echo)
            .service(hello_test)
            .service(index)
            .service(askama)
            .service(git_main)
            .service(hello_session)
            // .service(
            //     web::scope("/auth")
            //         .wrap(auth)
            //         .route("/", web::get().to(hello_auth))
            // )
            .service(
                web::resource("/auth")
                    .wrap(auth)
                    .route(web::get().to(hello_auth))
            )
            .route("/hey", web::get().to(manual_hello))
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}