use crate::sql::error::IResult;
use crate::sql::statement::{statements, Statement, Statements};
use nom::combinator::all_consuming;
use serde::{Deserialize, Serialize};
use std::fmt;
use std::str;

#[derive(Clone, Debug, Default, Eq, PartialEq, Serialize, Deserialize)]
pub struct Query {
	pub statements: Statements,
}

impl Query {
	pub fn statements(&self) -> &Vec<Statement> {
		&self.statements.0
	}
}

impl fmt::Display for Query {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		write!(f, "{}", self.statements)
	}
}

pub fn query(i: &str) -> IResult<&str, Query> {
	let (i, v) = all_consuming(statements)(i)?;
	Ok((
		i,
		Query {
			statements: v,
		},
	))
}

#[cfg(test)]
mod tests {

	use super::*;

	#[test]
	fn single_query() {
		let sql = "CREATE test";
		let res = query(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!("CREATE test;", format!("{}", out))
	}

	#[test]
	fn multiple_query() {
		let sql = "CREATE test; CREATE temp;";
		let res = query(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!("CREATE test;\nCREATE temp;", format!("{}", out))
	}

	#[test]
	fn multiple_query_semicolons() {
		let sql = "CREATE test;;;CREATE temp;;;";
		let res = query(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!("CREATE test;\nCREATE temp;", format!("{}", out))
	}

	#[test]
	fn multiple_query_semicolons_comments() {
		let sql = "CREATE test;;;CREATE temp;;;/* some comment */";
		let res = query(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!("CREATE test;\nCREATE temp;", format!("{}", out))
	}

	#[test]
	fn multiple_query_semicolons_multi_comments() {
		let sql = "CREATE test;;;CREATE temp;;;/* some comment */;;;/* other comment */";
		let res = query(sql);
		assert!(res.is_ok());
		let out = res.unwrap().1;
		assert_eq!("CREATE test;\nCREATE temp;", format!("{}", out))
	}
}