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use tower::layer::util::Stack;

use crate::server_prepare::PrepareDecorator;
use crate::{
    prepare_behave::effect_traits::{
        Prepare, PrepareMiddlewareEffect, PrepareRouteEffect, PrepareStateEffect,
    },
    prepare_sets::ContainerResult,
    ConcurrentPrepareSet, ServerPrepare,
};

type ServerPrepareNestRoute<C, P, Ri, Li, Log, State, Graceful, Decorator> = ServerPrepare<
    C,
    ContainerResult<(<P as Prepare<C>>::Effect, Ri), Li>,
    Log,
    State,
    Graceful,
    Decorator,
>;

type ServerPrepareNestMiddleware<C, P, Ri, Li, S, Log, State, Graceful, Decorator> = ServerPrepare<
    C,
    ContainerResult<
        Ri,
        Stack<<<P as Prepare<C>>::Effect as PrepareMiddlewareEffect<S>>::Middleware, Li>,
    >,
    Log,
    State,
    Graceful,
    Decorator,
>;

impl<C: 'static, Log, State, Graceful, Ri: 'static, Li: 'static, Decorator>
    ServerPrepare<C, ContainerResult<Ri, Li>, Log, State, Graceful, Decorator>
where
    Decorator: PrepareDecorator,
{
    /// adding a set of [Prepare] executing concurrently
    ///
    /// # Note
    ///
    /// [Prepare] set added by different [Self::prepare_concurrent] will be executed serially
    pub fn prepare_concurrent<F>(
        self,
        concurrent: F,
    ) -> ServerPrepare<C, ContainerResult<Ri, Li>, Log, State, Graceful, Decorator>
    where
        F: FnOnce(ConcurrentPrepareSet<'_, C, Decorator>) -> ConcurrentPrepareSet<'_, C, Decorator>
            + 'static,
    {
        let prepares = self.span.in_scope(|| {
            debug!(mode = "Concurrent", action = "Add Prepare");
            let decorator = self.prepares.get_decorator();
            let concurrent_set =
                ConcurrentPrepareSet::new(self.prepares.get_configure(), &*decorator);
            self.prepares.combine(concurrent(concurrent_set))
        });
        ServerPrepare::new(prepares, self.graceful, self.state, self.span)
    }

    /// adding a [Prepare] apply effect on [**Router**](axum::Router)
    ///
    /// ## Note
    ///
    /// the [Prepare] task will be executed one by one.
    ///
    /// **DO NOT** block any task for a long time, neither **sync** nor **async**
    pub fn prepare_route<P, S>(
        self,
        prepare: P,
    ) -> ServerPrepareNestRoute<C, P, Ri, Li, Log, State, Graceful, Decorator>
    where
        P: Prepare<C> + 'static,
        P::Effect: PrepareRouteEffect<S>,
        Ri: PrepareRouteEffect<S>,
        S: Clone + Send + 'static + Sync,
    {
        let prepares = self.span.in_scope(|| {
            debug!(
                mode = "Serial",
                action = "Add Prepare Route",
                prepare = core::any::type_name::<P>()
            );
            self.prepares.then_route(prepare)
        });

        ServerPrepare::new(prepares, self.graceful, self.state, self.span)
    }
    /// adding a [Prepare] adding effect on **State**
    ///
    /// ## Note
    ///
    /// the [Prepare] task will be executed one by one.
    ///
    /// **DO NOT** block any task for a long time, neither **sync** nor **async**
    pub fn prepare_state<P>(
        self,
        prepare: P,
    ) -> ServerPrepare<C, ContainerResult<Ri, Li>, Log, State, Graceful, Decorator>
    where
        P: Prepare<C> + 'static,
        P::Effect: PrepareStateEffect,
    {
        let prepares = self.span.in_scope(|| {
            debug!(
                mode = "Serial",
                action = "Add Prepare State",
                prepare = core::any::type_name::<P>()
            );
            self.prepares.then_state(prepare)
        });

        ServerPrepare::new(prepares, self.graceful, self.state, self.span)
    }

    /// adding a [Prepare] apply  effect on **State** and **Middleware**
    ///
    /// ## Note
    ///
    /// the [Prepare] task will be executed one by one.
    ///
    /// **DO NOT** block any task for a long time, neither **sync** nor **async**
    pub fn prepare_middleware<S, P>(
        self,
        prepare: P,
    ) -> ServerPrepareNestMiddleware<C, P, Ri, Li, S, Log, State, Graceful, Decorator>
    where
        S: 'static,
        P: Prepare<C> + 'static,
        P::Effect: PrepareMiddlewareEffect<S>,
    {
        let prepares = self.span.in_scope(|| {
            debug!(
                mode = "Serial",
                action = "Add Prepare Middleware",
                prepare = core::any::type_name::<P>()
            );
            self.prepares.then_middleware(prepare)
        });

        ServerPrepare::new(prepares, self.graceful, self.state, self.span)
    }

    /// adding a [Prepare] without effect
    pub fn prepare<P>(
        self,
        prepare: P,
    ) -> ServerPrepare<C, ContainerResult<Ri, Li>, Log, State, Graceful, Decorator>
    where
        P: Prepare<C, Effect = ()> + 'static,
    {
        let prepares = self.span.in_scope(|| {
            debug!(
                mode = "Serial",
                action = "Add Prepare Middleware",
                prepare = core::any::type_name::<P>()
            );
            self.prepares.then(prepare)
        });

        ServerPrepare::new(prepares, self.graceful, self.state, self.span)
    }
}