#[macro_use] extern crate log;
#[macro_use] extern crate actix_web;

use actix_web::{get, post, web, App, HttpResponse, HttpServer, Responder, HttpRequest};
use parking_lot::Mutex;
use actix_web::web::{service, scope};
use actix_web::http::StatusCode;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::path::{PathBuf, Path};
use actix_web_static_files;
use tera::Tera;
use include_dir::Dir;
use std::sync::Arc;
use log::LevelFilter;
use crate::tera_ext::TeraExt;
use once_cell::sync::Lazy;
use std::borrow::Borrow;
use std::ops::Deref;
use yopa::{Storage, TypedValue};
use std::collections::HashMap;

mod tera_ext;
mod routes;

// Embed static files
include!(concat!(env!("OUT_DIR"), "/static_files.rs"));

// Embed templates
static TEMPLATES: include_dir::Dir = include_dir::include_dir!("./resources/templates");

pub(crate) static TERA : Lazy<Tera> = Lazy::new(|| {
    let mut tera = Tera::default();
    tera.add_include_dir_templates(&TEMPLATES);

    // Special filter for the TypedValue map
    use serde_json::Value;
    tera.register_filter("print_typed_value", |v : &Value, _ : &HashMap<String, Value>| -> tera::Result<Value> {
        if v.is_null() {
            return Ok(v.clone());
        }
        if let Value::Object(map) = v {
            if let Some((_, v)) = map.iter().next() {
                return Ok(v.clone());
            }
        }
        Err(tera::Error::msg("Expected nonenmpty object"))
    });

    tera
});

type YopaStoreWrapper = web::Data<tokio::sync::RwLock<yopa::Storage>>;

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    simple_logging::log_to_stderr(LevelFilter::Debug);

    // Ensure the lazy ref is initialized early (to catch template bugs ASAP)
    let _ = TERA.deref();

    let database : YopaStoreWrapper = {
        let mut store = Storage::new();

        // Seed the store with some dummy data for view development
        use yopa::model;
        use yopa::DataType;

        let id_recipe = store.define_object(model::ObjectModel {
            id: Default::default(),
            name: "Recipe".to_string(),
            parent: None
        }).unwrap();
        let id_book = store.define_object(model::ObjectModel {
            id: Default::default(),
            name: "Book".to_string(),
            parent: None
        }).unwrap();
        let id_ing = store.define_object(model::ObjectModel {
            id: Default::default(),
            name: "Ingredient".to_string(),
            parent: None
        }).unwrap();

        store.define_property(model::PropertyModel {
            id: Default::default(),
            object: id_recipe,
            name: "name".to_string(),
            optional: false,
            multiple: true,
            data_type: DataType::String,
            default: None
        }).unwrap();

        store.define_property(model::PropertyModel {
            id: Default::default(),
            object: id_book,
            name: "title".to_string(),
            optional: false,
            multiple: false,
            data_type: DataType::String,
            default: None
        }).unwrap();

        store.define_property(model::PropertyModel {
            id: Default::default(),
            object: id_book,
            name: "author".to_string(),
            optional: true,
            multiple: true,
            data_type: DataType::String,
            default: Some(TypedValue::String("Pepa Novák".into()))
        }).unwrap();

        let rel_book_id = store.define_relation(model::RelationModel {
            id: Default::default(),
            object: id_recipe,
            name: "book reference".to_string(),
            optional: true,
            multiple: true,
            related: id_book
        }).unwrap();

        store.define_property(model::PropertyModel {
            id: Default::default(),
            object: rel_book_id,
            name: "page".to_string(),
            optional: true,
            multiple: false,
            data_type: DataType::Integer,
            default: None
        }).unwrap();

        store.define_relation(model::RelationModel {
            id: Default::default(),
            object: id_recipe,
            name: "related recipe".to_string(),
            optional: true,
            multiple: true,
            related: id_recipe
        }).unwrap();

        web::Data::new(tokio::sync::RwLock::new(store))
    };

    HttpServer::new(move || {
        let static_files = actix_web_static_files::ResourceFiles::new("/static", included_static_files())
            .do_not_resolve_defaults();

        App::new()
            .app_data(database.clone())
            .service(routes::index)
            .service(static_files)
    })
        .bind("127.0.0.1:8080")?.run().await
}