use crate::*;

use winit::dpi::PhysicalSize;
use winit::event::ElementState;
use winit::keyboard::KeyCode;

use std::path::PathBuf;


pub enum Request {
    SetTitle(String),
    SetSize(Dimensions),
    SetSizeBounds(SizeBounds),
    SetResizable(bool),
    SetFullscreen(bool),
    SetVisible(bool),
    SetPixelScale(u32),
    SetCursor(Option<CursorIcon>),
    SetIcon(Option<Icon>),
    Redraw,
    CreateWindow(WindowBuilder),
    CloseWindow,
} 


#[derive(Debug)]
pub enum Event {
    Initialise,
    CloseRequest,
    Close,
    Resize(Dimensions),
    FocusChange(bool),
    CursorEnter,
    CursorExit,
    CursorMove(Position),
    ScrollLines { axis: Axis, distance: f32 },
    ScrollPixels { axis: Axis, distance: f32 },
    MouseButton { button: MouseButton, action: Action },
    KeyboardInput { key: KeyCode, action: Action },
    CharacterInput(char),
    ModifierChange(ModifiersState),
    FileDrop(PathBuf),
} 


#[derive(Copy, Clone, Debug, PartialEq)]
pub enum Action {
    Pressed,
    Released
}

impl Action {
    pub fn is_pressed(self) -> bool {
        self == Action::Pressed
    }
}

impl From<ElementState> for Action {
    fn from(value: ElementState) -> Self {
        match value {
            ElementState::Pressed => Action::Pressed,
            ElementState::Released => Action::Released,
        }
    }
}


#[derive(Copy, Clone, Debug, PartialEq)]
pub enum Axis {
    Horizontal,
    Vertical,
}


#[derive(Copy, Clone, Debug, PartialEq)]
pub enum MouseButton {
    Left,
    Middle,
    Right,
    Back,
    Forward,
}


#[derive(Copy, Clone, Debug, PartialEq)]
pub struct SizeBounds {
    pub min_width: Option<u32>,
    pub max_width: Option<u32>,
    pub min_height: Option<u32>,
    pub max_height: Option<u32>,
}

impl SizeBounds {
    pub fn as_min_max_size(&self, scale: u32) -> (PhysicalSize<u32>, PhysicalSize<u32>) {
        (
            PhysicalSize {
                width:  self.min_width.unwrap_or(0).saturating_mul(scale),
                height: self.min_height.unwrap_or(0).saturating_mul(scale),
            },
            PhysicalSize {
                width:  self.max_width.unwrap_or(u32::MAX).saturating_mul(scale),
                height: self.max_height.unwrap_or(u32::MAX).saturating_mul(scale),
            },
        )
    }
}

impl Default for SizeBounds {
    fn default() -> Self {
        Self {
            min_width: None,
            max_width: None,
            min_height: None,
            max_height: None,
        }
    }
}