use crsn::asm::data::{Rd, RdObj, Wr};
use crsn::asm::data::literal::Value;
use crate::parse::{BUF_IOMODE_QUEUE, BUF_IOMODE_REVERSE_QUEUE, BUF_IOMODE_STACK, BUF_IOMODE_REVERSE_STACK};

#[derive(Clone, Debug, PartialEq)]
pub enum BufValue {
    Zeros(Rd),
    Values(Vec<Rd>),
    Chars(String),
}

#[derive(Clone, Copy, Debug, PartialEq)]
pub enum BufIoMode {
    Queue,
    ReverseQueue,
    Stack,
    ReverseStack,
}

impl BufIoMode {
    pub fn to_value(self) -> Value {
        match self {
            BufIoMode::Queue => BUF_IOMODE_QUEUE,
            BufIoMode::ReverseQueue => BUF_IOMODE_REVERSE_QUEUE,
            BufIoMode::Stack => BUF_IOMODE_STACK,
            BufIoMode::ReverseStack => BUF_IOMODE_REVERSE_STACK,
        }
    }
}

impl Default for BufIoMode {
    fn default() -> Self {
        Self::Queue
    }
}

#[derive(Clone, Debug, PartialEq)]
pub enum BufOps {
    New { dst: Wr, value: BufValue },
    SetIoMode { obj: RdObj, mode: BufIoMode },

    // Elementary ops
    Read { dst: Wr, obj: RdObj, idx: Rd },
    GetLen { dst: Wr, obj: RdObj },
    Write { obj: RdObj, idx: Rd, value: Rd },
    Insert { obj: RdObj, idx: Rd, value: Rd },
    Remove { dst: Wr, obj: RdObj, idx: Rd },
    CompareSwap { obj: RdObj, idx: Rd, expected: Rd, src: Rd },

    // Whole buffer ops
    Resize { obj: RdObj, len: Rd },
    Reverse { obj: RdObj },
    AppendBuf { obj: RdObj, obj2: RdObj },
    PrependBuf { obj: RdObj, obj2: RdObj },

    // Stack-style ops
    Push { obj: RdObj, src: Rd },
    Pop { dst: Wr, obj: RdObj },
}