use crate::addressing::Address;
use crate::database::Entry;
use crate::hash::{decode, encode};
use actix::prelude::*;
use actix_files::NamedFile;
use actix_web::error::{ErrorBadRequest, ErrorInternalServerError};
use actix_web::{error, get, post, web, Error, HttpResponse};
use anyhow::Result;
use log::debug;
use serde::Deserialize;
use std::collections::HashMap;
use std::path::PathBuf;

#[derive(Clone)]
pub struct State {
    pub directory: PathBuf,
    pub db: Addr<crate::database::DbExecutor>,
    pub hasher: Addr<crate::hash::HasherWorker>,
}

#[get("/raw/{hash}")]
pub async fn get_raw(state: web::Data<State>, hash: web::Path<String>) -> Result<NamedFile, Error> {
    let address = Address::decode(&decode(hash.into_inner()).map_err(ErrorInternalServerError)?)
        .map_err(ErrorInternalServerError)?;
    if let Address::Hash(hash) = address {
        let response = state
            .db
            .send(crate::database::RetrieveByHash { hash })
            .await?;

        debug!("{:?}", response);

        match response {
            Ok(result) => match result {
                Some(path) => Ok(NamedFile::open(path)?),
                None => Err(error::ErrorNotFound("NOT FOUND")),
            },
            Err(e) => Err(error::ErrorInternalServerError(e)),
        }
    } else {
        Err(ErrorBadRequest("Address does not refer to a file."))
    }
}

#[get("/get/{address_str}")]
pub async fn get_object(
    state: web::Data<State>,
    address_str: web::Path<String>,
) -> Result<HttpResponse, Error> {
    let response: Result<Vec<Entry>> = state
        .db
        .send(crate::database::RetrieveObject {
            target: Address::decode(
                &decode(address_str.into_inner()).map_err(ErrorInternalServerError)?,
            )
            .map_err(ErrorInternalServerError)?,
        })
        .await?;

    debug!("{:?}", response);

    let mut result: HashMap<String, serde_json::Value> = HashMap::new();
    for entry in response.map_err(error::ErrorInternalServerError)? {
        result.insert(encode(&entry.identity.0), entry.as_json());
    }
    Ok(HttpResponse::Ok().json(result))
}

#[derive(Deserialize)]
pub struct LookupRequest {
    query: String,
}

#[get("/api/lookup")]
pub async fn get_lookup(
    state: web::Data<State>,
    web::Query(info): web::Query<LookupRequest>,
) -> Result<HttpResponse, Error> {
    let response = state
        .db
        .send(crate::database::LookupByFilename { query: info.query })
        .await?;

    Ok(HttpResponse::Ok().json(response.map_err(error::ErrorInternalServerError)?))
}

#[post("/api/refresh")]
pub async fn api_refresh(state: web::Data<State>) -> Result<HttpResponse, Error> {
    actix::spawn(crate::filesystem::reimport_directory(
        state.directory.clone(),
        state.db.clone(),
        state.hasher.clone(),
    ));
    Ok(HttpResponse::Ok().finish())
}