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use anyhow::Result;
use format_buf::format;
use num_bigint::BigInt;

use std::any::Any;

use super::{as_arguments_0, FormatSpecifier, Type, Value};

impl Value for String {
	fn call(&self, func: &str, args: &[Box<dyn Value>]) -> Result<Box<dyn Value>> {
		match func {
			"is_empty" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.is_empty()))
			}
			"len" => {
				as_arguments_0(args)?;
				Ok(Box::new(BigInt::from(self.len())))
			}
			"to_lowercase" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.to_lowercase()))
			}
			"to_string" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.to_string()))
			}
			"to_uppercase" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.to_uppercase()))
			}
			"trim" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.trim().to_string()))
			}
			"trim_end" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.trim_end().to_string()))
			}
			"trim_start" => {
				as_arguments_0(args)?;
				Ok(Box::new(self.trim_start().to_string()))
			}
			_ => self.call_base(func, args),
		}
	}

	fn get_type(&self) -> Type {
		Type::String
	}

	fn as_any(&self) -> &dyn Any {
		self
	}

	fn format(&self, buffer: &mut String, spec: FormatSpecifier) {
		match spec {
			FormatSpecifier::Default => *buffer += self,
			FormatSpecifier::Debug => format!(buffer, "{:?}", self),
			FormatSpecifier::DebugAlt => format!(buffer, "{:#?}", self),
		}
	}
}