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use crate::{ast::Number, AST};
use num::{BigInt, BigUint, Num};
use std::fmt::{self, Display};

pub fn number_refine(h: &str, data: &str) -> AST {
    let input = AST::NumberLiteral { handler: h.to_string(), data: data.to_string() };
    match h {
        "i8" => {
            let number = data.parse::<i8>().unwrap();
            return AST::Number(Number::Integer8(number));
        }
        "i16" => {
            let number = data.parse::<i16>().unwrap();
            return AST::Number(Number::Integer16(number));
        }
        "i32" => {
            let number = data.parse::<i32>().unwrap();
            return AST::Number(Number::Integer32(number));
        }
        "i64" => {
            let number = data.parse::<i64>().unwrap();
            return AST::Number(Number::Integer64(number));
        }
        "i128" => {
            let number = data.parse::<i128>().unwrap();
            return AST::Number(Number::Integer128(number));
        }
        "u8" => {
            let number = data.parse::<u8>().unwrap();
            return AST::Number(Number::Unsigned8(number));
        }
        "u16" => {
            let number = data.parse::<u16>().unwrap();
            return AST::Number(Number::Unsigned16(number));
        }
        "u32" => {
            let number = data.parse::<u32>().unwrap();
            return AST::Number(Number::Unsigned32(number));
        }
        "u64" => {
            let number = data.parse::<u64>().unwrap();
            return AST::Number(Number::Unsigned64(number));
        }
        "u128" => {
            let number = data.parse::<u128>().unwrap();
            return AST::Number(Number::Unsigned128(number));
        }
        "int" => {
            let number = BigInt::from_str_radix(&data, 10).unwrap();
            return AST::Number(Number::Integer(number));
        }
        "unt" => {
            let number = BigUint::from_str_radix(&data, 10).unwrap();
            return AST::Number(Number::Unsigned(number));
        }
        "x" => {
            let number = BigInt::from_str_radix(&data, 16).unwrap();
            return AST::Number(Number::Integer(number));
        }
        "o" => {
            let number = BigInt::from_str_radix(&data, 8).unwrap();
            return AST::Number(Number::Integer(number));
        }
        "b" => {
            let number = BigInt::from_str_radix(&data, 2).unwrap();
            return AST::Number(Number::Integer(number));
        }
        "f32" => {
            let number = data.parse::<f32>().unwrap();
            return AST::Number(Number::Decimal32(number));
        }
        "f64" => {
            let number = data.parse::<f64>().unwrap();
            return AST::Number(Number::Decimal64(number));
        }
        _ => (),
    };
    return input;
}

#[allow(unused_variables)]
impl Number {}

impl Display for Number {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Number::Integer(i) => write!(f, "{}", i),
            Number::Integer8(i) => write!(f, "{}", i),
            Number::Integer16(i) => write!(f, "{}", i),
            Number::Integer32(i) => write!(f, "{}", i),
            Number::Integer64(i) => write!(f, "{}", i),
            Number::Integer128(i) => write!(f, "{}", i),
            Number::Unsigned(i) => write!(f, "{}", i),
            Number::Unsigned8(i) => write!(f, "{}", i),
            Number::Unsigned16(i) => write!(f, "{}", i),
            Number::Unsigned32(i) => write!(f, "{}", i),
            Number::Unsigned64(i) => write!(f, "{}", i),
            Number::Unsigned128(i) => write!(f, "{}", i),
            Number::Decimal32(i) => {
                let mut s = format!("{}", i);
                if !s.ends_with('.') {
                    s.push_str(".0")
                }
                write!(f, "{}", s)
            }
            Number::Decimal64(i) => {
                let mut s = format!("{}", i);
                if !s.ends_with('.') {
                    s.push_str(".0")
                }
                write!(f, "{}", s)
            }
            _ => write!(f, "{:?}", self),
        }
    }
}