use bevy_app::{Plugin, App, Update};
use bevy_ecs::{system::{Res, ResMut}, schedule::State};
use bevy_input::{Input, keyboard::KeyCode, mouse::MouseButton};

use crate::{resource::*, contract::{Action, GameState, InputsContainer}};

pub struct ControlsPlugin<Action, InputsContainer, GameState> {
    _action: std::marker::PhantomData<Action>,
    _inputs_container: std::marker::PhantomData<InputsContainer>,
    _game_state: std::marker::PhantomData<GameState>,
}

impl<
    A: Action,
    Ic: InputsContainer<A>,
    Gs: GameState
> Plugin for ControlsPlugin<A, Ic, Gs> {
    fn build(&self, app: &mut App) {
        app.init_resource::<Controls<A, Gs>>()
            .add_systems(Update, Self::save_input);

        #[cfg(feature = "reflect")]
        app.register_type::<Controls<A, Gs>>();
    }

}

impl<
    A: Action,
    Ic: InputsContainer<A>,
    Gs: GameState
> ControlsPlugin<A, Ic, Gs> {
    /// Process all hard inputs and bindings to update [`PlayerInputs`]
    fn save_input(
        keyboard_input: Res<Input<KeyCode>>,
        mouse_input: Res<Input<MouseButton>>,
        lobby: ResMut<Ic>,
        controls: Res<Controls<A, Gs>>,
        game_state: Res<State<Gs>>,
    ) {
        if let Some(inputs) = lobby.me_mut() {
            for (action, config) in controls.iter() {
                'bindings_loop: for binding in config.bindings.iter() {
                    for condition in &binding.conditions {
                        match condition {
                            BindingCondition::InGameState(state) => {
                                if *state != *game_state.get() {
                                    continue 'bindings_loop;
                                }
                            }
                        }
                    }

                    match &binding.input {
                        ButtonCombination::Single(button) => match button {
                            InputType::Keyboard(key) => {
                                inputs.forced_set(*action, keyboard_input.pressed(*key));
                            }
                            InputType::Mouse(input) => {
                                match input {
                                    MouseInput::Axis(_axis) => {
                                        todo!();
                                    }
                                    MouseInput::Button(button) => {
                                        if !mouse_input
                                            .get_pressed()
                                            .any(|b| b == button)
                                        {
                                            continue 'bindings_loop;
                                        }
                                    }
                                    MouseInput::Wheel(_axis) => {
                                        todo!();
                                    }
                                }
                            }
                        },
                        ButtonCombination::Chord(buttons) => {
                            // If any button in chord is not pressed we skip this `binding`
                            for button in buttons {
                                match button {
                                    InputType::Keyboard(key) => {
                                        if !keyboard_input.pressed(*key) {
                                            continue 'bindings_loop;
                                        }
                                    }
                                    InputType::Mouse(input) => {
                                        match input {
                                            MouseInput::Axis(_axis) => {
                                                todo!();
                                            }
                                            MouseInput::Button(button) => {
                                                if !mouse_input
                                                    .get_pressed()
                                                    .any(|b| b == button)
                                                {
                                                    continue 'bindings_loop;
                                                }
                                            }
                                            MouseInput::Wheel(_axis) => {
                                                todo!();
                                            }
                                        }
                                    }
                                }
                            }

                            // TODO: should be [`Chord`](ButtonCombination::Chord) only [`Boolean`](InputValue::Boolean) type
                            inputs.forced_set(*action, true);
                        }
                    }
                }
            }
        } else {
            log::error!("cannot find me in inputs container")
        }
    }
}


// #[cfg(test)]
// mod performance_test {
//     use crate::{ util::test::{enable_loggings, measure_time, Times}, resource::PlayerInputs};

//     use super::Controls;
//     use std::time::Duration;

//     /// Test for execution time for [`Controls`] get
//     ///
//     /// Example:
//     /// ```
//     ///     cargo test --package pih-pah-app --lib --features "dev, ui_egui" -- controls::test::controls_get --exact --nocapture
//     /// ```
//     #[test]
//     fn controls_get() {
//         enable_loggings();

//         let controls = Controls::default();

//         let duration = measure_time(
//             || {
//                 controls.get(Action::LeverEditorForward);
//                 controls.get(Action::LevelEditorBackward);
//                 controls.get(Action::LevelEditorLeft);
//                 controls.get(Action::LevelEditorRight);
//             },
//             Times::default(),
//         );

//         log::info!("time: {:?}", duration);
//     }

//     /// Test for execution speed for [`PlayerInputs`] get
//     fn player_inputs_get() -> Duration {
//         enable_loggings();

//         let inputs = PlayerInputs::default();

//         let duration = measure_time(
//             || {
//                 inputs.get(Action::LeverEditorForward);
//                 inputs.get(Action::LevelEditorBackward);
//                 inputs.get(Action::LevelEditorLeft);
//                 inputs.get(Action::LevelEditorRight);
//             },
//             Times::default(),
//         );

//         duration
//     }

//     /// Test for execution speed for [`PlayerInputs`] get_many
//     fn player_inputs_get_many() -> Duration {
//         enable_loggings();

//         let inputs = PlayerInputs::default();

//         let duration = measure_time(
//             || {
//                 inputs.get_many(vec![
//                     Action::LeverEditorForward,
//                     Action::LevelEditorBackward,
//                     Action::LevelEditorLeft,
//                     Action::LevelEditorRight,
//                 ]);
//             },
//             Times::default(),
//         );

//         duration
//     }

//     /// Test for execution speed for [`PlayerInputs`] get and get_many
//     ///
//     /// Example:
//     /// ```
//     ///     cargo test --package pih-pah-app --lib --features "dev, ui_egui" -- controls::test::compare_player_inputs_get_and_get_many --exact --nocapture
//     /// ```
//     #[test]
//     fn compare_player_inputs_get_and_get_many() {
//         let get = player_inputs_get();
//         let get_many = player_inputs_get_many();

//         log::info!("get: {:?}", get);
//         log::info!("get_many: {:?}", get_many);
//     }

//     /// Test for execution speed for [`InputValue`] casting
//     #[test]
//     fn action_casting() {
//         enable_loggings();

//         let inputs = PlayerInputs::default();

//         let duration = measure_time(
//             || {
//                 let _ = (inputs.get(Action::LeverEditorForward).as_boolean() as i8
//                     - inputs.get(Action::LevelEditorBackward).as_boolean() as i8)
//                     as f32;
//             },
//             10000000.into(),
//         );

//         log::info!("with casting: {:?}", duration);

//         let inputs = PlayerInputs::default();

//         let duration = measure_time(
//             || {
//                 let _ = inputs.get(Action::LeverEditorForward);
//                 let _ = inputs.get(Action::LevelEditorBackward);
//             },
//             10000000.into(),
//         );

//         log::info!("without casting: {:?}", duration);
//     }
// }