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use token::{Tokenizer, StrictTokenizer};
use util::{pad_u32, pad_i32};
use errors::Error;

/// Tries to parse string as a token. Does not require string to clearly represent the value.
pub struct LenientTokenizer;

impl Tokenizer for LenientTokenizer {
	fn tokenize_address(value: &str) -> Result<[u8; 20], Error> {
		StrictTokenizer::tokenize_address(value)
	}

	fn tokenize_string(value: &str) -> Result<String, Error> {
		StrictTokenizer::tokenize_string(value)
	}

	fn tokenize_bool(value: &str) -> Result<bool, Error> {
		StrictTokenizer::tokenize_bool(value)
	}

	fn tokenize_bytes(value: &str) -> Result<Vec<u8>, Error> {
		StrictTokenizer::tokenize_bytes(value)
	}

	fn tokenize_fixed_bytes(value: &str, len: usize) -> Result<Vec<u8>, Error> {
		StrictTokenizer::tokenize_fixed_bytes(value, len)
	}

	fn tokenize_uint(value: &str) -> Result<[u8; 32], Error> {
		let result = StrictTokenizer::tokenize_uint(value);
		if result.is_ok() {
			return result;
		}

		let uint = try!(u32::from_str_radix(value, 10));
		Ok(pad_u32(uint))
	}

	fn tokenize_int(value: &str) -> Result<[u8; 32], Error> {
		let result = StrictTokenizer::tokenize_int(value);
		if result.is_ok() {
			return result;
		}

		let int = try!(i32::from_str_radix(value, 10));
		Ok(pad_i32(int))
	}
}