use color_print::cformat;

pub struct Compare {
	pub right: String,
	pub left: String,
}
pub struct Compared {
	pub right: String,
	pub left: String,
}

pub struct Comparer {
	formatted_right: String,
	formatted_left: String
}
impl Comparer {
	pub const fn new() -> Self {
		Self {
			formatted_right: String::new(),
			formatted_left:  String::new(),
		}
	}

	fn format_compare(&mut self, left_char: char, right_char: char) {
		if left_char == right_char {
			self.formatted_left.push(left_char);
			self.formatted_right.push(right_char);
		} else {
			self.formatted_left.push_str(&cformat!("<r>{left_char}</>"));
			self.formatted_right.push_str(&cformat!("<r>{right_char}</>"));
		};
	}

	pub fn compare(&mut self, compare: Compare) -> Compared {
		let right_chars: Vec<char> = compare.right.chars().collect();

		for (i, left_char) in compare.left.chars().enumerate() {
			match right_chars.get(i) {
				Some(right_char) => self.format_compare(left_char, *right_char),
				None => break,
			}
		}
		Compared {
			right: self.formatted_right.clone(),
			left:  self.formatted_left.clone()
		}
	}
}