use actix_web::{get, web::{self, Data}, HttpRequest, HttpResponse, Responder};
use anyhow::anyhow;
use std::{collections::{HashMap, HashSet}, sync::Arc, time::Instant};
use libseptastic::{direction, route::RouteType, stop_schedule::Trip};
use serde::{Serialize, Deserialize};

use  crate::AppState;
//use crate::{routing::{bfs_rts, construct_graph, get_stops_near}, AppState};
//use crate::routing;

#[get("/routes")]
async fn get_routes_html(req: HttpRequest, state: Data<Arc<AppState>>) -> impl Responder {
    crate::perform_action(req, move || {
        let statex = state.clone();
        async move {
            let start_time = Instant::now();

            let all_routes: Vec<libseptastic::route::Route> = statex.gtfs_service.get_routes();
            let rr_routes = all_routes.clone().into_iter().filter(|x| x.route_type == RouteType::RegionalRail).collect();
            let subway_routes =  all_routes.clone().into_iter().filter(|x| x.route_type == RouteType::SubwayElevated).collect();
            let trolley_routes = all_routes.clone().into_iter().filter(|x| x.route_type == RouteType::Trolley).collect();
            let bus_routes = all_routes.into_iter().filter(|x| x.route_type == RouteType::TracklessTrolley || x.route_type == RouteType::Bus).collect();

           Ok(crate::templates::ContentTemplate {
                page_title: Some(String::from("Routes")),
                page_desc: Some(String::from("All SEPTA routes.")),
                widescreen: false,
                content: crate::templates::RoutesTemplate {
                    rr_routes,
                    subway_routes,
                    trolley_routes,
                    bus_routes,
                },
                load_time_ms: Some(start_time.elapsed().as_millis()) 
            })
        }
    }).await
}


#[get("/routes.json")]
async fn get_routes_json(state: Data<Arc<AppState>>) -> impl Responder {
   let all_routes: Vec<libseptastic::route::Route> = state.gtfs_service.get_routes();
    HttpResponse::Ok().json(all_routes)
}

#[derive(Debug, Deserialize, Clone)]
pub struct RouteQueryParams {
    #[serde(default)] // Optional: handle missing parameters with a default value
    stops: Option<String>,
}

#[derive(Serialize, Deserialize)]
pub struct RouteResponse {
    pub route: libseptastic::route::Route,
    pub directions: Vec<libseptastic::direction::Direction>,
    pub schedule: Vec<Trip>
}

async fn get_route_info(route_id: String, state: Data<Arc<AppState>>) -> ::anyhow::Result<RouteResponse> {
    let route = state.gtfs_service.get_route(route_id.clone())?;
    let mut trips = state.gtfs_service.get_schedule(route_id)?;

    let mut seen = HashSet::new();
    let directions: Vec<_> = trips
        .iter()
        .map(|x| x.direction.clone())
        .filter(|dir| seen.insert(dir.direction.to_string()))
        .collect();

    state.trip_tracking_service.annotate_trips(&mut trips).await;

    Ok(RouteResponse{
            route,
            directions,
            schedule: trips
    })
}

//#[get("/directions")]
//async fn get_directions(state: Data<Arc<AppState>>) -> impl Responder {
//    let near_thresh = 0.45;
//
//    let sig_cds = routing::Coordinates {
//        lat: 40.008420,
//        lng: -75.213439
//    };
//    
//    let home_cds = routing::Coordinates {
//        lat: 39.957210,
//        lng: -75.166214
//    };
//
//    let all_stops = state.gtfs_service.get_all_stops();
//
//
//
//    let origin_stops: HashSet<String> = get_stops_near(home_cds, &all_stops);
//    let dest_stops: HashSet<String> = get_stops_near(sig_cds.clone(), &all_stops);
//
//    let mut graph = construct_graph(sig_cds, &all_stops, &state.gtfs_service);
//
//    let mut response = String::new();
//    for stop in &origin_stops {
//        response += bfs_rts(&stop, &mut graph, &dest_stops).as_str();
//    }
//
//    return response;
//}

#[get("/route/{route_id}")]
async fn get_route(state: Data<Arc<AppState>>, req: HttpRequest, info: web::Query<RouteQueryParams>, path: web::Path<String>) -> impl Responder {
    crate::perform_action(req, move || {
        let pathx = path.clone();
        let infox = info.clone();
        let statex = state.clone();
        async move { 
        let mut filters: Option<Vec<String>> = None;
        if let Some (stops_v) = infox.stops.clone() {
            let mut items = Vec::new();

            for sid in stops_v.split(",") {
                items.push(String::from(sid));
            }
            filters = Some(items);
        }

        let route_id = pathx;
        let route_info_r = get_route_info(route_id.clone(), statex.clone()).await;

        if let Ok(route_info) = route_info_r {
            let timetables = crate::templates::build_timetables(route_info.directions, route_info.schedule);

            Ok(crate::templates::ContentTemplate {
                widescreen: false,
                page_title: Some(format!("Schedules for {}", route_id.clone())),
                page_desc: Some(format!("Schedule information for {}", route_id.clone())),
                content: crate::templates::RouteTemplate {
                    route: route_info.route,
                    timetables,
                    filter_stops: filters.clone()
                },
                load_time_ms: None
            })
        } else {
            Err(anyhow!("test"))
        }
    }}).await
}

#[get("/route/{route_id}.json")]
async fn api_get_route(state: Data<Arc<AppState>>, path: web::Path<String>) -> impl Responder {
    let route_id = path.into_inner();
    let route_info_r = get_route_info(route_id, state).await;
    if let Ok(route_info) = route_info_r {
        HttpResponse::Ok().json(route_info)
    } else {
        HttpResponse::InternalServerError().body("Error")
    }
}

#[get("/api/route/{route_id}/schedule")]
async fn api_get_schedule(state: Data<Arc<AppState>>, path: web::Path<String>) -> impl Responder {
    let route_id = path.into_inner();
    let route_r: anyhow::Result<i32> = Ok(5);

    if let Ok(route) = route_r {
        HttpResponse::Ok().json(route)
    } else {
        HttpResponse::InternalServerError().body("Error")
    }
}