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use crate::db_object::{DBObject, OrderTypes};
use crate::df_world::DBDFWorld;
use crate::schema::link_he_hf;
use crate::DbConnection;
use df_st_core::fillable::{Fillable, Filler};
use df_st_core::item_count::ItemCount;
use df_st_derive::Fillable;
use diesel::expression_methods::ExpressionMethods;
use diesel::prelude::*;
use diesel::query_dsl::RunQueryDsl;
use diesel::Queryable;
use failure::Error;
use std::collections::HashMap;

#[derive(
    Clone, Debug, AsChangeset, Queryable, Insertable, Fillable, Default, Hash, PartialEq, Eq,
)]
#[table_name = "link_he_hf"]
pub struct LinkHEHF {
    /// A reference to a HistoricalEvent.
    pub he_id: i32,
    /// A reference to a HistoricalFigure.
    pub hf_id: i32,
    pub world_id: i32,
}

impl LinkHEHF {
    pub fn new() -> Self {
        Self::default()
    }
}

impl DBObject<df_st_core::LinkHEHF, LinkHEHF> for LinkHEHF {
    fn add_missing_data_advanced(_core_world: &df_st_core::DFWorld, _world: &mut DBDFWorld) {}

    #[cfg(feature = "postgres")]
    fn insert_into_db(conn: &DbConnection, link_he_hf: &[LinkHEHF]) {
        diesel::insert_into(link_he_hf::table)
            .values(link_he_hf)
            .on_conflict_do_nothing()
            .execute(conn)
            .expect("Error saving link_he_hf");
    }

    #[cfg(not(feature = "postgres"))]
    fn insert_into_db(conn: &DbConnection, link_he_hf: &[LinkHEHF]) {
        diesel::insert_into(link_he_hf::table)
            .values(link_he_hf)
            .execute(conn)
            .expect("Error saving link_he_hf");
    }

    fn find_db_item(
        conn: &DbConnection,
        id_filter: HashMap<String, i32>,
    ) -> Result<Option<LinkHEHF>, Error> {
        use crate::schema::link_he_hf::dsl::*;
        let query = link_he_hf;
        let query = query.filter(world_id.eq(id_filter.get("world_id").unwrap_or(&0)));
        let query = query.filter(he_id.eq(id_filter.get("he_id").unwrap_or(&0)));
        let query = query.filter(hf_id.eq(id_filter.get("hf_id").unwrap_or(&0)));
        Ok(query.first::<LinkHEHF>(conn).optional()?)
    }

    fn find_db_list(
        conn: &DbConnection,
        id_filter: HashMap<String, i32>,
        _string_filter: HashMap<String, String>,
        offset: i64,
        limit: i64,
        order: Option<OrderTypes>,
        order_by: Option<String>,
        _id_list: Option<Vec<i32>>,
    ) -> Result<Vec<LinkHEHF>, Error> {
        use crate::schema::link_he_hf::dsl::*;
        let (order_by, asc) = Self::get_order(order, order_by);
        let query = link_he_hf.limit(limit).offset(offset);
        let query = query.filter(world_id.eq(id_filter.get("world_id").unwrap_or(&0)));
        optional_filter! {
            query, id_filter,
            [
                "he_id" => he_id,
                "hf_id" => hf_id,
            ],
            {Ok(order_by!{
                order_by, asc, query, conn,
                "he_id" => he_id,
                "hf_id" => hf_id,
            })},
        }
    }

    fn match_field_by(field: String) -> String {
        match field.as_ref() {
            "hf_id" => "hf_id",
            _ => "he_id",
        }
        .to_owned()
    }

    fn add_nested_items(
        _conn: &DbConnection,
        _db_list: &[LinkHEHF],
        core_list: Vec<df_st_core::LinkHEHF>,
    ) -> Result<Vec<df_st_core::LinkHEHF>, Error> {
        // Nothing to add
        Ok(core_list)
    }

    fn get_count_from_db(
        conn: &DbConnection,
        id_filter: HashMap<String, i32>,
        _string_filter: HashMap<String, String>,
        offset: u32,
        limit: u32,
        group_by_opt: Option<String>,
        _id_list: Option<Vec<i32>>,
    ) -> Result<Vec<ItemCount>, Error> {
        use crate::schema::link_he_hf::dsl::*;
        let query = link_he_hf.limit(limit as i64).offset(offset as i64);
        let query = query.filter(world_id.eq(id_filter.get("world_id").unwrap_or(&0)));
        optional_filter! {
            query, id_filter,
            [
                "he_id" => he_id,
                "hf_id" => hf_id,
            ],
            {group_by!{
                group_by_opt, query, conn,
                "he_id" => {he_id: i32},
                "hf_id" => {hf_id: i32},
            };},
        };
    }
}

/// From Core to DB
impl Filler<LinkHEHF, df_st_core::LinkHEHF> for LinkHEHF {
    fn add_missing_data(&mut self, source: &df_st_core::LinkHEHF) {
        self.he_id.add_missing_data(&source.he_id);
        self.hf_id.add_missing_data(&source.hf_id);
    }
}

/// From DB to Core
impl Filler<df_st_core::LinkHEHF, LinkHEHF> for df_st_core::LinkHEHF {
    fn add_missing_data(&mut self, source: &LinkHEHF) {
        self.he_id.add_missing_data(&source.he_id);
        self.hf_id.add_missing_data(&source.hf_id);
    }
}

impl PartialEq<LinkHEHF> for df_st_core::LinkHEHF {
    fn eq(&self, other: &LinkHEHF) -> bool {
        self.he_id == other.he_id && self.hf_id == other.hf_id
    }
}

impl PartialEq<df_st_core::LinkHEHF> for LinkHEHF {
    fn eq(&self, other: &df_st_core::LinkHEHF) -> bool {
        self.he_id == other.he_id && self.hf_id == other.hf_id
    }
}