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use super::context::*;
use super::value_interpreter::*;
use super::value_raw::*;
use num_bigint::BigUint;
use num_traits::ToPrimitive;
use std::cmp::{Ord, Ordering};
use std::fmt;

pub trait InterpretableFrom<T> {
	fn interpret_from(from: T, context: &InterpreterContext) -> Self;
}

#[derive(Clone, Debug)]
pub struct BytesValue {
	pub value: Vec<u8>,
	pub original: ValueSubTree,
}

impl BytesValue {
	pub fn empty() -> Self {
		BytesValue {
			value: Vec::new(),
			original: ValueSubTree::Str(String::default()),
		}
	}
}

impl From<Vec<u8>> for BytesValue {
	fn from(v: Vec<u8>) -> Self {
		BytesValue {
			value: v,
			original: ValueSubTree::Str(String::default()),
		}
	}
}

impl InterpretableFrom<ValueSubTree> for BytesValue {
	fn interpret_from(from: ValueSubTree, context: &InterpreterContext) -> Self {
		BytesValue {
			value: interpret_subtree(&from, context),
			original: from,
		}
	}
}

impl fmt::Display for BytesValue {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		self.original.fmt(f)
	}
}

#[derive(Debug)]
pub struct BigUintValue {
	pub value: BigUint,
	pub original: ValueSubTree,
}

impl InterpretableFrom<ValueSubTree> for BigUintValue {
	fn interpret_from(from: ValueSubTree, context: &InterpreterContext) -> Self {
		let bytes = interpret_subtree(&from, context);
		BigUintValue {
			value: BigUint::from_bytes_be(&bytes),
			original: from,
		}
	}
}

impl fmt::Display for BigUintValue {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		self.original.fmt(f)
	}
}

impl Default for BigUintValue {
	fn default() -> Self {
		BigUintValue {
			original: ValueSubTree::default(),
			value: BigUint::from(0u32),
		}
	}
}

#[derive(Debug)]
pub struct U64Value {
	pub value: u64,
	pub original: ValueSubTree,
}

impl InterpretableFrom<ValueSubTree> for U64Value {
	fn interpret_from(from: ValueSubTree, context: &InterpreterContext) -> Self {
		let bytes = interpret_subtree(&from, context);
		let bu = BigUint::from_bytes_be(&bytes);
		U64Value {
			value: bu.to_u64().unwrap(),
			original: from,
		}
	}
}

impl fmt::Display for U64Value {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		self.original.fmt(f)
	}
}

#[derive(Clone, Debug)]
pub struct BytesKey {
	pub value: Vec<u8>,
	pub original: String,
}

impl From<Vec<u8>> for BytesKey {
	fn from(v: Vec<u8>) -> Self {
		BytesKey {
			value: v,
			original: String::default(),
		}
	}
}

impl PartialEq for BytesKey {
	fn eq(&self, other: &Self) -> bool {
		self.value == other.value
	}
}

impl Eq for BytesKey {}

impl PartialOrd for BytesKey {
	fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
		self.value.partial_cmp(&other.value)
	}
}

impl Ord for BytesKey {
	fn cmp(&self, other: &Self) -> Ordering {
		self.value.cmp(&other.value)
	}
}

impl InterpretableFrom<String> for BytesKey {
	fn interpret_from(from: String, context: &InterpreterContext) -> Self {
		let bytes = interpret_string(&from, context);
		BytesKey {
			value: bytes,
			original: from,
		}
	}
}

impl fmt::Display for BytesKey {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		self.original.fmt(f)
	}
}