use bevy::prelude::*;
use bevy_asset_loader::asset_collection::AssetCollection;
use ron_asset_manager::prelude::RonAsset;
use serde::{Deserialize, Serialize};

use crate::{math::int::FGi32, menus::style::FGUiStyle};

#[derive(Reflect, Serialize, Deserialize, Clone)]
#[reflect(opaque)]
pub struct FighterSettingsCommon {
    pub walk_speed_ease: FGi32,

    /// Maximum allowed horizontal velocity
    pub ground_max_horizontal_velocity: FGi32,

    /// Ground friction applied when the fighter is above the walk speed
    pub ground_friction_over_walk_speed_multiplier: FGi32,
    pub knockback_stacking_window: u32,
    pub knockback_decay_per_frame: FGi32,

    /// Multiplier that translates knockback -> game unit velocity
    pub knockback_launch_velocity_multiplier: FGi32,
    pub hitstun_frames_per_unit_knockback: FGi32,

    /// If an attack's hitstop > this value it will cause a grounded fighter to either bounce (if a meteor/spike)
    /// or to become airborne
    pub tumble_bounce_hitstop_threshold: u32,

    /// Angle diff from straight down under which the attack will count as a meteor
    pub meteor_angle_threshold: FGi32,

    /// Angle diff from straight up under which the attack will force an airborne state 
    pub attack_ground_to_airborne_transition_vertical_angle_threshold: FGi32,
}
#[derive(Reflect, Serialize, Deserialize, Clone)]
#[reflect(opaque)]
pub struct InputSettingsCommon {
    pub stick_deadzone: FGi32,
    pub trigger_deadzone: FGi32,
    pub smash_input_reset_axis_threshold: FGi32,
    pub smash_input_axis_threshold: FGi32,
    pub run_stick_threshold: FGi32,
    pub smash_input_frame_threshold: u8,
    pub input_buffer_size: u8,
    pub turn_into_dashback_window: u8,
}

#[derive(Reflect, Serialize, Deserialize, Resource, Asset, Clone, RonAsset)]
pub struct GameSettings {
    pub fighter_common: FighterSettingsCommon,
    pub input_common: InputSettingsCommon,
    pub fighter_manifest_paths: Vec<String>,
    pub stage_manifest_paths: Vec<String>,
}

#[derive(AssetCollection, Resource)]
pub struct CommonAssets {
    #[asset(path = "game_settings.ron")]
    pub game_settings: Handle<GameSettings>,
    #[asset(path = "game.stylesheet.ron")]
    pub ui_style: Handle<FGUiStyle>,
}

impl FromWorld for GameSettings {
    fn from_world(world: &mut World) -> Self {
        let game_settings_handle = world.resource::<CommonAssets>().game_settings.clone();
        world
            .resource::<Assets<GameSettings>>()
            .get(&game_settings_handle)
            .expect("GameSettings should already be loaded! Bug?")
            .clone()
    }
}