use crate::common::database::Wolves;
use serde::{Deserialize, Serialize};
use sqlx::{Pool, Sqlite};

/**
   This file relates to anything that directly interacts with teh wolves API
*/

#[derive(Deserialize, Serialize, Debug)]
struct WolvesResultUserMin {
  // committee: String,
  member_id: String,
  // first_name: String,
  // last_name: String,
  contact_email: String,
  // opt_in_email: String,
  // student_id: Option<String>,
  // note: Option<String>,
  // expiry: String,
  // requested: String,
  // approved: String,
  // sitename: String,
  // domain: String,
}
async fn add_users_wolves(db: &Pool<Sqlite>, user: &WolvesResultUserMin) {
  // expiry
  match sqlx::query_as::<_, Wolves>(
    "
      INSERT INTO wolves (id_wolves, email)
      VALUES ($1, $2)
      ON CONFLICT(id_wolves) DO UPDATE SET email = $2
    ",
  )
  .bind(&user.member_id)
  .bind(&user.contact_email)
  .fetch_optional(db)
  .await
  {
    Ok(_) => {}
    Err(e) => {
      println!("Failure to insert into Wolves {:?}", user);
      println!("{:?}", e);
    }
  }
}

/**
  This is getting data for Clubs and Socs
*/
pub mod cns {
  use crate::common::database::{get_server_config_bulk, DataBase, ServerMembers, ServerMembersWolves, Servers};
  use crate::common::wolves::{add_users_wolves, WolvesResultUserMin};
  use crate::Config;
  use serenity::client::Context;
  use serenity::model::id::GuildId;
  use sqlx::{Pool, Sqlite};
  use std::collections::BTreeMap;

  impl From<&wolves_oxidised::WolvesUser> for WolvesResultUserMin {
    fn from(value: &wolves_oxidised::WolvesUser) -> Self {
      Self {
        member_id: value.member_id.to_owned(),
        contact_email: value.contact_email.to_owned(),
      }
    }
  }

  pub async fn get_wolves(ctx: &Context) {
    let db_lock = {
      let data_read = ctx.data.read().await;
      data_read.get::<DataBase>().expect("Expected Database in TypeMap.").clone()
    };
    let db = db_lock.read().await;

    let config_lock = {
      let data_read = ctx.data.read().await;
      data_read.get::<Config>().expect("Expected Config in TypeMap.").clone()
    };
    let config = config_lock.read().await;

    // set up teh client
    let wolves = wolves_oxidised::Client::new(&config.wolves_url, Some(&config.wolves_api));

    for server_config in get_server_config_bulk(&db).await {
      let Servers {
        server,
        // this is the unique api key for each club/soc
        wolves_api,
        wolves_id,
        ..
      } = &server_config;
      // dbg!(&server_config);

      let existing_tmp = get_server_member(&db, server).await;
      let existing = existing_tmp.iter().map(|data| (data.id_wolves, data)).collect::<BTreeMap<_, _>>();

      // list of users that need to be updated for this server
      let mut server_name_tmp = None;
      for user in wolves.get_members(wolves_api).await {
        // dbg!(&user.committee);
        if server_name_tmp.is_none() {
          server_name_tmp = Some(user.committee_id);
        }
        let id = user.member_id.parse::<u64>().unwrap_or_default();
        match existing.get(&(id as i64)) {
          None => {
            // user does not exist already, add everything
            add_users_wolves(&db, &WolvesResultUserMin::from(&user)).await;
            add_users_server_members(&db, server, &user).await;
          }
          Some(old) => {
            // always update wolves table, in case data has changed
            add_users_wolves(&db, &WolvesResultUserMin::from(&user)).await;
            if old.expiry != user.expiry {
              add_users_server_members(&db, server, &user).await;
            }
          }
        }
      }

      if let Some(cs_id) = server_name_tmp {
        if &cs_id != wolves_id {
          set_server_member(&db, server, cs_id).await;
        }
      }
    }
  }

  async fn set_server_member(db: &Pool<Sqlite>, server: &GuildId, wolves_id: i64) {
    match sqlx::query_as::<_, Servers>(
      "
              UPDATE servers
              SET wolves_id = ?
              WHERE server = ?
            ",
    )
    .bind(wolves_id)
    .bind(server.get() as i64)
    .fetch_optional(db)
    .await
    {
      Ok(_) => {}
      Err(e) => {
        println!("Failure to set server name {}", server.get());
        println!("{:?}", e);
      }
    }
  }

  async fn get_server_member(db: &Pool<Sqlite>, server: &GuildId) -> Vec<ServerMembersWolves> {
    sqlx::query_as::<_, ServerMembersWolves>(
      r#"
      SELECT *
      FROM server_members
      JOIN wolves USING (id_wolves)
      WHERE (
        server = ?
        AND discord IS NOT NULL
      )
      "#,
    )
    .bind(server.get() as i64)
    .fetch_all(db)
    .await
    .unwrap_or_default()
  }

  async fn add_users_server_members(db: &Pool<Sqlite>, server: &GuildId, user: &wolves_oxidised::WolvesUser) {
    match sqlx::query_as::<_, ServerMembers>(
      "
      INSERT OR REPLACE INTO server_members (server, id_wolves, expiry)
      VALUES (?1, ?2, ?3)
    ",
    )
    .bind(server.get() as i64)
    .bind(&user.member_id)
    .bind(&user.expiry)
    .fetch_optional(db)
    .await
    {
      Ok(_) => {}
      Err(e) => {
        println!("Failure to insert into ServerMembers {}  {:?}", server.get(), user);
        println!("{:?}", e);
      }
    }
  }
}

/**
  Get and store the data on C&S committees
*/
pub mod committees {
  use crate::common::database::DataBase;
  use crate::Config;
  use serenity::client::Context;
  use sqlx::{Pool, Sqlite};

  // Database entry for it
  #[derive(Debug, Clone, sqlx::FromRow)]
  pub struct Committees {
    pub id: i64,
    pub name_full: String,
    pub name_profile: String,
    pub name_plain: String,
    pub link: String,
    #[sqlx(json)]
    pub committee: Vec<i64>,
  }

  impl From<wolves_oxidised::WolvesCNS> for Committees {
    fn from(value: wolves_oxidised::WolvesCNS) -> Self {
      Self {
        id: value.id,
        name_full: value.name_full,
        name_profile: value.name_profile,
        name_plain: value.name_plain,
        link: value.link,
        committee: value.committee,
      }
    }
  }

  pub async fn get_cns(ctx: &Context) {
    let db_lock = {
      let data_read = ctx.data.read().await;
      data_read.get::<DataBase>().expect("Expected Database in TypeMap.").clone()
    };
    let db = db_lock.read().await;

    let config_lock = {
      let data_read = ctx.data.read().await;
      data_read.get::<Config>().expect("Expected Config in TypeMap.").clone()
    };
    let config = config_lock.read().await;

    let wolves = wolves_oxidised::Client::new(&config.wolves_url, Some(&config.wolves_api));
    // request data from wolves
    for committee_wolves in wolves.get_committees().await {
      let committee = Committees::from(committee_wolves);
      add_committee(&db, &committee).await;
    }
  }

  async fn add_committee(db: &Pool<Sqlite>, committee: &Committees) {
    match sqlx::query_as::<_, Committees>(
      "
      INSERT INTO committees (id, name_profile, name_full, name_plain, link, committee)
      VALUES ($1, $2, $3, $4, $5, $6)
      ON CONFLICT(id) DO UPDATE SET committee = $6
    ",
    )
    .bind(committee.id)
    .bind(&committee.name_profile)
    .bind(&committee.name_full)
    .bind(&committee.name_plain)
    .bind(&committee.link)
    .bind(serde_json::to_string(&committee.committee).unwrap_or_default())
    .fetch_optional(db)
    .await
    {
      Ok(_) => {}
      Err(e) => {
        println!("Failure to insert into Committees {:?}", committee);
        println!("{:?}", e);
      }
    }
  }
}