pub mod lexer;

#[cfg(test)]
mod lexer_tests {
	use super::lexer::{self, Token, Class};

	#[test]
	fn single_key() {
		let tree = lexer::tokenize("key = \"value\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };
		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn single_key_escaped_double_quote_in_string() {
		let tree = lexer::tokenize("key = \"\\\"value\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("\\\"value".to_string()) };
		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn integers() {
		let tree = lexer::tokenize("key = 123567\r\nkey2 = -400");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::INTEGER, value: Some("123567".to_string()) };
		let nl = Token { class: Class::NEWLINE, value: None };
		let id2 = Token { class: Class::IDENTIFIER, value: Some("key2".to_string()) };
		let op2 = Token { class: Class::EQUALS, value: None };
		let strn2 = Token { class: Class::INTEGER, value: Some("-400".to_string()) };
		let manual_tree = vec![id, op, strn, nl, id2, op2, strn2];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn booleans() {
		let tree = lexer::tokenize("key = true\r\nkey2 = FALSE");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::TRUE, value: None };
		let nl = Token { class: Class::NEWLINE, value: None };
		let id2 = Token { class: Class::IDENTIFIER, value: Some("key2".to_string()) };
		let op2 = Token { class: Class::EQUALS, value: None };
		let strn2 = Token { class: Class::FALSE, value: None };
		let manual_tree = vec![id, op, strn, nl, id2, op2, strn2];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn single_key_space_in_string() {
		let tree = lexer::tokenize("key = \"a b c\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("a b c".to_string()) };
		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn single_key_double_space_in_string() {
		let tree = lexer::tokenize("key = \"a b c  d\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("a b c  d".to_string()) };
		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn triple_key() {
		let tree = lexer::tokenize("key = \"value\"\r\nkey2 = \"value2\"\r\nkey3 = \"value3\"");

		let nl = Token { class: Class::NEWLINE, value: None };
		let nl2 = Token { class: Class::NEWLINE, value: None };
		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };
		let id2 = Token { class: Class::IDENTIFIER, value: Some("key2".to_string()) };
		let op2 = Token { class: Class::EQUALS, value: None };
		let strn2 = Token { class: Class::STRING, value: Some("value2".to_string()) };
		let id3 = Token { class: Class::IDENTIFIER, value: Some("key3".to_string()) };
		let op3 = Token { class: Class::EQUALS, value: None };
		let strn3 = Token { class: Class::STRING, value: Some("value3".to_string()) };

		let manual_tree = vec![id, op, strn, nl, id2, op2, strn2, nl2, id3, op3, strn3];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn comment() {
		let tree = lexer::tokenize("# This is a comment\r\nkey = \"value\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };

		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn inline_comment() {
		let tree = lexer::tokenize("# This is a comment\r\nkey = \"value\" # I'm inline!");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };

		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn inline_comment_no_spaces() {
		let tree = lexer::tokenize("#This is a comment\r\nkey = \"value\" #I'm inline!");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };

		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn quoted_identifier() {
		let tree = lexer::tokenize("\"key\" = \"value\"");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let strn = Token { class: Class::STRING, value: Some("value".to_string()) };

		let manual_tree = vec![id, op, strn];
		assert_eq!(tree.unwrap(), manual_tree);
	}

	#[test]
	fn double_equals() {
		let tree = lexer::tokenize("\"key\" = =");

		let id = Token { class: Class::IDENTIFIER, value: Some("key".to_string()) };
		let op = Token { class: Class::EQUALS, value: None };
		let op2 = Token { class: Class::EQUALS, value: None };

		let manual_tree = vec![id, op, op2];
		assert_eq!(tree.unwrap(), manual_tree);
	}
}