use std::sync::Arc;

use geoffrey_models::models::item::ItemListing;
use geoffrey_models::models::locations::{LocationDataDb, LocationDb};
use geoffrey_models::models::parameters::selling_params::{ItemSort, Order, SellingParams};
use geoffrey_models::models::player::Player;
use geoffrey_models::models::response::selling_listing::SellingListing;
use geoffrey_models::models::CommandLevel;

use crate::api_endpoint::{ApiEndpoint, RequestType};
use crate::commands::Command;
use crate::context::Context;
use crate::Result;

pub struct Selling {}

impl ApiEndpoint for Selling {
    fn endpoint_name() -> String {
        "selling".to_string()
    }

    fn request_type() -> RequestType {
        RequestType::GET
    }
}

impl Command for Selling {
    type Req = SellingParams;
    type Resp = Vec<SellingListing>;

    fn command_level() -> CommandLevel {
        CommandLevel::ALL
    }

    fn run_command(ctx: Arc<Context>, req: &Self::Req, _: Option<Player>) -> Result<Self::Resp> {
        let mut listings: Vec<SellingListing> = ctx
            .db
            .filter(|_, loc: &LocationDb| {
                if let LocationDataDb::Shop(shop_data) = loc.loc_data.clone() {
                    shop_data.item_listings.iter().any(|item| {
                        item.item
                            .name
                            .to_lowercase()
                            .contains(&req.query.to_lowercase())
                    })
                } else {
                    false
                }
            })?
            .filter_map(|shop: LocationDb| {
                if let LocationDataDb::Shop(shop_data) = shop.clone().loc_data {
                    let listings: Vec<SellingListing> = shop_data
                        .item_listings
                        .iter()
                        .filter_map(|item| {
                            if item.item.name.to_lowercase().contains(&req.query) {
                                Some(SellingListing {
                                    listing: item.clone(),
                                    shop_name: shop.name.clone(),
                                    shop_loc: shop.position,
                                    portal: shop.portal.clone(),
                                })
                            } else {
                                None
                            }
                        })
                        .collect();

                    Some(listings)
                } else {
                    None
                }
            })
            .flatten()
            .collect();

        let sort = req.sort.as_ref().unwrap_or(&ItemSort::Restock);

        match sort {
            ItemSort::Price => {
                listings.sort_by(|a, b| ItemListing::order_by_price(&a.listing, &b.listing))
            }
            ItemSort::Restock => {
                listings.sort_by(|a, b| ItemListing::order_by_restock(&a.listing, &b.listing))
            }
        }

        let ordering = if let Some(order) = &req.order {
            order
        } else {
            match sort {
                ItemSort::Price => &Order::Low,
                ItemSort::Restock => &Order::High,
            }
        };

        if *ordering == Order::High {
            listings.reverse();
        }

        Ok(listings)
    }
}

#[cfg(test)]
mod test {
    use std::path::PathBuf;
    use std::time::Instant;

    use geoffrey_models::models::item::ItemListing;
    use geoffrey_models::models::locations::shop::Shop;
    use geoffrey_models::models::locations::{LocationDataDb, LocationDb};
    use geoffrey_models::models::parameters::selling_params::SellingParams;
    use geoffrey_models::models::settings::GeoffreySettings;
    use geoffrey_models::models::Position;

    use crate::commands::selling::Selling;
    use crate::commands::Command;
    use crate::config::{GeoffreyAPIConfig, ServerConfig};
    use crate::context::Context;
    use crate::Args;

    fn test_selling_lookup_speed(iter: i32, shop_count: i32, items_for_sale: i32) -> f32 {
        let config = GeoffreyAPIConfig {
            server_config: ServerConfig {
                db_path: PathBuf::from("test_db/"),
                host: "".to_string(),
            },
            geoffrey_settings: GeoffreySettings::default(),
        };

        let ctx = Context::new(config.clone(), Args::default()).unwrap();

        let mut shop_data = Shop::default();

        for _ in 0..items_for_sale {
            shop_data
                .item_listings
                .insert(ItemListing::new("sed", 5, 5));
        }

        for i in 0..shop_count {
            let shop = LocationDb::new(
                format!("Test Shop {} {}", iter, i).as_str(),
                Position::default(),
                0,
                None,
                LocationDataDb::Shop(shop_data.clone()),
            );
            ctx.db.insert(shop).unwrap();
        }

        let start = Instant::now();

        Selling::run_command(
            ctx,
            &SellingParams {
                query: "sed".to_string(),
                sort: None,
                order: None,
            },
            None,
        )
        .unwrap();

        let query_dur = start.elapsed().as_secs_f32();

        return query_dur;
    }

    #[test]
    fn stress_test() {
        std::fs::remove_dir_all(PathBuf::from("test_db")).ok();
        println!("Shop Count,Item Count,Query Time,Query Time / Shop");
        for shop_count in (100..=500).step_by(100) {
            let query_dur = test_selling_lookup_speed(shop_count, 100, 10);

            println!(
                "{},{},{},{}",
                shop_count,
                10,
                query_dur,
                query_dur / (shop_count as f32)
            );
        }
        std::fs::remove_dir_all(PathBuf::from("test_db")).ok();
    }
}