use crate::{
    GameState,
    cash::Cash,
    loading_assets::GameAssets,
    physics_layers::GameLayer,
    protocol::{SkipReplicateColliders, TbMapIdCounter},
    utils::global_observer,
};
use avian3d::{
    parry::{na::SVector, shape::SharedShape},
    prelude::*,
};
use bevy::{
    ecs::{lifecycle::HookContext, world::DeferredWorld},
    math::*,
    prelude::*,
};
use bevy_trenchbroom::prelude::*;
use serde::{Deserialize, Serialize};

#[point_class(base(Transform), model({ "path": "models/spawn.glb" }))]
#[derive(Default)]
#[component(on_add = Self::on_add)]
pub struct SpawnPoint {}

impl SpawnPoint {
    fn on_add(mut world: DeferredWorld, HookContext { entity, .. }: HookContext) {
        let Some(assets) = world.get_resource::<GameAssets>() else {
            return;
        };

        let mesh = assets.mesh_spawn.clone();

        world.commands().entity(entity).insert((
            Name::new("spawn"),
            SceneRoot(mesh),
            RigidBody::Static,
            ColliderConstructorHierarchy::new(ColliderConstructor::ConvexHullFromMesh),
        ));
    }
}

#[solid_class(
    hooks(SpawnHooks::new().convex_collider())
)]
#[derive(Default)]
pub struct Worldspawn;

#[solid_class(base(Transform), hooks(SpawnHooks::new()))]
#[derive(Default)]
pub struct Water;

#[solid_class(base(Transform), hooks(SpawnHooks::new().convex_collider()))]
#[derive(Default)]
pub struct Crates;

#[solid_class(base(Transform), hooks(SpawnHooks::new().convex_collider()))]
#[derive(Default)]
pub struct NamedEntity {
    pub name: String,
}

#[solid_class(base(Transform, Target), hooks(SpawnHooks::new().convex_collider()))]
#[derive(Default)]
#[require(RigidBody = RigidBody::Kinematic)]
pub struct Platform;

#[point_class(base(Transform))]
#[derive(Default)]
pub struct PlatformTarget {
    pub targetname: String,
}

#[solid_class(base(Transform, Target), hooks(SpawnHooks::new().convex_collider()))]
#[derive(Default, Serialize, Deserialize, PartialEq)]
#[require(RigidBody = RigidBody::Kinematic)]
pub struct Movable {
    pub name: String,
}

#[point_class(base(Transform))]
#[derive(Default)]
pub struct MoveTarget {
    pub targetname: String,
}

#[point_class(base(Transform))]
#[derive(Default)]
pub struct CameraTarget {
    pub targetname: String,
}

#[point_class(base(Transform, Target))]
#[derive(Default)]
pub struct CutsceneCamera {
    pub name: String,
    pub targetname: String,
}

#[point_class(base(Transform, Target))]
#[derive(Default)]
pub struct CutsceneCameraMovementEnd;

#[point_class(base(Transform), model({ "path": "models/alien_naked.glb" }))]
#[derive(Default)]
#[component(on_add = Self::on_add)]
pub struct EnemySpawn {
    pub head: String,
    pub key: String,
    pub disable_ai: bool,
    pub spawn_order: Option<u32>,
}

impl EnemySpawn {
    fn on_add(mut world: DeferredWorld, HookContext { entity, .. }: HookContext) {
        //TODO: figure out why this crashes if removed
        let Some(_assets) = world.get_resource::<GameAssets>() else {
            return;
        };

        let this = world.get_entity(entity).unwrap().get::<Self>().unwrap();
        let this_transform = world
            .get_entity(entity)
            .unwrap()
            .get::<Transform>()
            .unwrap();

        let mut this_transform = *this_transform;
        this_transform.translation += Vec3::new(0., 1.5, 0.);

        let position = Position::new(this_transform.translation);
        let rotation = Rotation(this_transform.rotation);

        let head = this.head.clone();

        world.commands().entity(entity).insert((
            this_transform,
            position,
            rotation,
            Name::from(format!("enemy [{head}]")),
            Visibility::default(),
            RigidBody::Kinematic,
            Collider::capsule(0.6, 2.),
            CollisionLayers::new(LayerMask(GameLayer::Npc.to_bits()), LayerMask::ALL),
            LockedAxes::new().lock_rotation_z().lock_rotation_x(),
        ));
    }
}

#[point_class(base(Transform), model({ "path": "models/cash.glb" }))]
#[derive(Default)]
#[component(on_add = Self::on_add)]
pub struct CashSpawn {}

impl CashSpawn {
    fn on_add(mut world: DeferredWorld, HookContext { entity, .. }: HookContext) {
        let Some(assets) = world.get_resource::<GameAssets>() else {
            return;
        };

        let mesh = assets.mesh_cash.clone();

        world.commands().entity(entity).insert((
            Name::new("cash"),
            SceneRoot(mesh),
            Cash,
            Collider::cuboid(2., 3.0, 2.),
            CollisionLayers::new(GameLayer::CollectibleSensors, LayerMask::ALL),
            RigidBody::Static,
            CollisionEventsEnabled,
            Sensor,
        ));
    }
}

#[point_class(base(Transform), model({ "path": "models/head_drop.glb" }))]
#[derive(Default)]
pub struct SecretHead {
    pub head_id: usize,
}

fn fix_target_tb_entities(
    mut commands: Commands,
    mut entities: Query<(Entity, &Transform, &Collider), With<Target>>,
) {
    for (entity, tf, coll) in entities.iter_mut() {
        if let Some(shape) = coll.shape().as_compound() {
            let mut shapes: Vec<_> = shape.shapes().to_vec();

            for shape in shapes.iter_mut() {
                shape.0.translation.vector -= SVector::<f32, 3>::from(tf.translation.to_array());
            }

            commands
                .entity(entity)
                .insert(Collider::from(SharedShape::compound(shapes)));
        }
    }
}

pub fn plugin(app: &mut App) {
    app.register_type::<SpawnPoint>();
    app.override_class::<Worldspawn>();
    app.register_type::<Water>();
    app.register_type::<Crates>();
    app.register_type::<NamedEntity>();
    app.register_type::<Platform>();
    app.register_type::<PlatformTarget>();
    app.register_type::<Movable>();
    app.register_type::<MoveTarget>();
    app.register_type::<CameraTarget>();
    app.register_type::<CutsceneCamera>();
    app.register_type::<CutsceneCameraMovementEnd>();
    app.register_type::<EnemySpawn>();
    app.register_type::<CashSpawn>();
    app.register_type::<SecretHead>();

    app.add_systems(OnExit(GameState::MapLoading), fix_target_tb_entities);

    global_observer!(app, tb_component_setup::<CashSpawn>);
    global_observer!(app, tb_component_setup::<Movable>);
    global_observer!(app, tb_component_setup::<Platform>);
    global_observer!(app, tb_component_setup::<PlatformTarget>);
}

fn tb_component_setup<C: Component>(
    trigger: On<Add, C>,
    mut commands: Commands,
    mut world: DeferredWorld,
) {
    let id = world.resource_mut::<TbMapIdCounter>().alloc();

    commands
        .entity(trigger.event().entity)
        .insert_if_new(id)
        .insert(SkipReplicateColliders);
}