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use crate::internal::*;
use tract_pulse_opl::ops::Delay;

pub mod array;
pub mod cnn;
pub mod delay;
pub mod downsample;
pub mod dummy;
pub mod scan;
pub mod slice;
pub mod source;

pub(crate) fn sync_inputs(
    node: &TypedNode,
    target: &mut PulsedModel,
    mapping: &HashMap<OutletId, OutletId>,
) -> TractResult<TVec<OutletId>> {
    let mut max_delay = 0;
    for input in &node.inputs {
        let fact = target.outlet_fact(mapping[input])?;
        if let Some(stream) = &fact.stream {
            max_delay = max_delay.max(stream.delay);
        }
    }
    let mut inputs = tvec!();
    for input in &node.inputs {
        let mut input = mapping[input];
        let fact = target.outlet_fact(input)?.clone();
        if let Some(stream) = &fact.stream {
            if stream.delay < max_delay {
                let add_delay = max_delay - stream.delay;
                let delay_axis = stream.axis;
                input = target.wire_node(
                    format!("{}.Delay", &*node.name),
                    Delay::new_typed(&fact.into(), delay_axis, add_delay, 0),
                    &[input],
                )?[0];
            }
        }
        inputs.push(input);
    }
    Ok(inputs)
}

register_all_mod!(array, cnn, downsample, scan, source);

type PulsifierFn = fn(
    &TypedModel,
    &TypedNode,
    &mut PulsedModel,
    &HashMap<OutletId, OutletId>,
    &Symbol,
    &TDim,
) -> TractResult<Option<TVec<OutletId>>>;

pub struct OpPulsifier {
    pub type_id: std::any::TypeId,
    pub name: &'static str,
    pub func: PulsifierFn,
}

impl OpPulsifier {
    pub fn inventory() -> HashMap<TypeId, OpPulsifier> {
        let mut inventory = HashMap::default();
        register_all(&mut inventory);
        inventory
    }
}

pub trait PulsedOp:
    Op
    + fmt::Debug
    + tract_core::dyn_clone::DynClone
    + Send
    + Sync
    + 'static
    + Downcast
    + EvalOp
    + DynHash
{
    /// Reinterpret the PulsedOp as an Op.
    fn as_op(&self) -> &dyn Op;

    /// Reinterpret the PulsedOp as an Op, mutably.
    fn as_op_mut(&mut self) -> &mut dyn Op;

    /// Reinterpret the PulsedOp as an TypedOp.
    fn to_typed(&self) -> Box<dyn TypedOp>;

    /// Deduce output facts from input facts.
    fn pulsed_output_facts(&self, inputs: &[&PulsedFact]) -> TractResult<TVec<PulsedFact>>;
}

tract_core::dyn_clone::clone_trait_object!(PulsedOp);

impl Hash for Box<dyn PulsedOp> {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        std::hash::Hash::hash(&self.type_id(), state);
        self.dyn_hash(state)
    }
}

impl<O: PulsedOp> From<O> for Box<dyn PulsedOp> {
    fn from(it: O) -> Box<dyn PulsedOp> {
        Box::new(it)
    }
}

impl AsMut<dyn Op> for Box<dyn PulsedOp> {
    fn as_mut(&mut self) -> &mut dyn Op {
        self.as_op_mut()
    }
}

impl AsRef<dyn Op> for dyn PulsedOp {
    fn as_ref(&self) -> &dyn Op {
        self.as_op()
    }
}

impl AsRef<dyn Op> for Box<dyn PulsedOp> {
    fn as_ref(&self) -> &dyn Op {
        self.as_op()
    }
}

impl AsMut<dyn Op> for dyn PulsedOp {
    fn as_mut(&mut self) -> &mut dyn Op {
        self.as_op_mut()
    }
}

impl std::fmt::Display for Box<dyn PulsedOp> {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        write!(fmt, "{}", self.name())
    }
}

impl<'a> From<&'a Box<dyn PulsedOp>> for Box<dyn TypedOp> {
    fn from(op: &'a Box<dyn PulsedOp>) -> Box<dyn TypedOp> {
        op.to_typed()
    }
}