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#![allow(clippy::needless_return)]
#![deny(clippy::implicit_return)]
use yttrium_key_base as key_base;
#[cfg(feature = "loader")]
#[no_mangle]
pub fn key_create() -> *mut dyn key_base::Key {
	return Box::into_raw(Box::new(std_selfreact {
		info: create_key_info(),
		function: key_function,
	}));
}

pub fn safe_create() -> Box<dyn key_base::Key> {
	return Box::new(std_selfreact {
		info: create_key_info(),
		function: key_function,
	});
}

/*
Parameters:
Required, the reaction to add, either the ID or the Unicode emoji itself (NOT the name)
*/
fn create_key_info() -> key_base::KeyInfo {
	return key_base::KeyInfo {
		name: String::from("selfreact"),
		parameters_required: vec![1],
	};
}

#[allow(non_camel_case_types)]
struct std_selfreact {
	pub info: key_base::KeyInfo,
	pub function: fn(parameter: &[String], environment: &mut key_base::environment::Environment) -> Result<String, String>,
}

impl key_base::Key for std_selfreact {
	fn get_key_info(&self) -> &key_base::KeyInfo {
		return &self.info;
	}

	fn get_key_function(&self) -> fn(parameter: &[String], environment: &mut key_base::environment::Environment) -> Result<String, String> {
		return self.function;
	}
}

fn key_function(parameter: &[String], environment: &mut key_base::environment::Environment) -> Result<String, String> {
	//I'm not sure how reactions work, this might fail
	let matcher = regex::Regex::new(key_base::regexes::DISCORD_ID).unwrap();
	let reaction;
	if matcher.is_match(&parameter[0]) {
		//Guild reaction
		reaction = parameter[0].clone();
	} else {
		//Normal unicode reaction
		let grapheme_count = unicode_segmentation::UnicodeSegmentation::graphemes(parameter[0].as_str(), true).count();
		if grapheme_count == 1 {
			reaction = parameter[0].clone();
		} else {
			return Err(String::from("Too many characters passed to `selfreact`"));
		}
	}
	environment.reactions_to_add.push(reaction);
	return Ok(String::new());
}