use serde_derive::Serialize;
use std::ops::DerefMut;

use sqlx::pool::PoolConnection;
use sqlx::Sqlite;

use crate::db::errors::DatabaseError;
use crate::db::DbTag;
use crate::types::ControllerUid;

#[derive(Debug, Serialize, Clone)]
pub struct DbController {
	pub id: i64,
	pub uid: ControllerUid,
	pub name: String,
	pub relay_count: i64,
	pub active: bool,
}

impl DbController {
	pub async fn get_all(
		conn: &mut PoolConnection<Sqlite>,
	) -> Result<Vec<DbController>, DatabaseError> {
		Ok(sqlx::query_as!(DbController, "SELECT * FROM controllers")
			.fetch_all(conn.deref_mut())
			.await?)
	}

	pub async fn get(
		conn: &mut PoolConnection<Sqlite>,
		id: i64,
	) -> Result<DbController, DatabaseError> {
		sqlx::query_as!(DbController, "SELECT * FROM controllers WHERE id = ?", id)
			.fetch_optional(conn.deref_mut())
			.await
			.map(|s| s.ok_or(DatabaseError::NotFound))?
	}

	pub async fn get_by_uid(
		conn: &mut PoolConnection<Sqlite>,
		filter_uid: &ControllerUid,
	) -> Result<DbController, DatabaseError> {
		sqlx::query_as!(
			DbController,
			"SELECT * FROM controllers WHERE uid = ?",
			filter_uid
		)
		.fetch_optional(conn.deref_mut())
		.await
		.map(|s| s.ok_or(DatabaseError::NotFound))?
	}

	pub async fn get_by_tag(
		conn: &mut PoolConnection<Sqlite>,
		tag: &DbTag,
	) -> Result<Vec<DbController>, DatabaseError> {
		Ok(sqlx::query_as!(DbController, "SELECT schedule.* FROM controllers AS schedule INNER JOIN junction_tag ON junction_tag.schedule_id = schedule.id WHERE junction_tag.tag_id = ?", tag.id)
			.fetch_all(conn.deref_mut())
			.await?)
	}

	pub async fn delete_by_uid(
		conn: &mut PoolConnection<Sqlite>,
		filter_uid: ControllerUid,
	) -> Result<(), DatabaseError> {
		sqlx::query!("DELETE FROM controllers WHERE uid = ?", filter_uid)
			.execute(conn.deref_mut())
			.await
			.map(|res| match res.rows_affected() {
				0 => Err(DatabaseError::DeleteError),
				_ => Ok(()),
			})?
	}

	pub async fn create(
		conn: &mut PoolConnection<Sqlite>,
		new_uid: &ControllerUid,
		new_name: &str,
		new_relay_count: i64,
		new_active: bool,
	) -> Result<DbController, DatabaseError> {
		sqlx::query_as!(
			DbController,
			"INSERT INTO controllers (uid, name, relay_count, active) VALUES (?, ?, ?, ?) RETURNING *",
			new_uid,
			new_name,
			new_relay_count,
			new_active,
		)
		.fetch_optional(conn.deref_mut())
		.await?
		.ok_or(DatabaseError::InsertGetError)
	}

	pub async fn update(
		&self,
		conn: &mut PoolConnection<Sqlite>,
		new_name: &str,
		new_relay_count: i64,
		new_active: bool,
	) -> Result<DbController, DatabaseError> {
		sqlx::query!(
			"UPDATE controllers SET name = ?, relay_count = ?, active = ? WHERE id = ?",
			new_name,
			new_relay_count,
			new_active,
			self.id,
		)
		.execute(conn.deref_mut())
		.await?;

		Self::get(conn, self.id).await
	}
}