use std::fmt;

use super::{AnchoredKey, SignedPod, Statement, StatementArg, Value};
use crate::middleware::{hash_str, NativePredicate, OperationType, Predicate};

#[derive(Clone, Debug, PartialEq, Eq)]
pub enum OperationArg {
    Statement(Statement),
    Literal(Value),
    Entry(String, Value),
}

impl fmt::Display for OperationArg {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            OperationArg::Statement(s) => write!(f, "{}", s),
            OperationArg::Literal(v) => write!(f, "{}", v),
            OperationArg::Entry(k, v) => write!(f, "({}, {})", k, v),
        }
    }
}

impl From<Value> for OperationArg {
    fn from(v: Value) -> Self {
        Self::Literal(v)
    }
}

impl From<&Value> for OperationArg {
    fn from(v: &Value) -> Self {
        Self::Literal(v.clone())
    }
}

impl From<&str> for OperationArg {
    fn from(s: &str) -> Self {
        Self::Literal(Value::from(s))
    }
}

impl From<i64> for OperationArg {
    fn from(v: i64) -> Self {
        Self::Literal(Value::from(v))
    }
}

impl From<bool> for OperationArg {
    fn from(b: bool) -> Self {
        Self::Literal(Value::from(b))
    }
}

impl From<(&SignedPod, &str)> for OperationArg {
    fn from((pod, key): (&SignedPod, &str)) -> Self {
        Self::Statement((pod, key).into())
    }
}

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Operation(pub OperationType, pub Vec<OperationArg>);

impl fmt::Display for Operation {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{:?} ", self.0)?;
        for (i, arg) in self.1.iter().enumerate() {
            if i != 0 {
                write!(f, " ")?;
            }
            write!(f, "{}", arg)?;
        }
        Ok(())
    }
}