use crate::gfx::BlendMode;
use prometeu_hal::color::Color;

#[derive(Debug, Clone, PartialEq, Eq)]
pub enum OverlayCommand {
    FillRectBlend { x: i32, y: i32, w: i32, h: i32, color: Color, mode: BlendMode },
    DrawLine { x0: i32, y0: i32, x1: i32, y1: i32, color: Color },
    DrawCircle { x: i32, y: i32, r: i32, color: Color },
    DrawDisc { x: i32, y: i32, r: i32, border_color: Color, fill_color: Color },
    DrawSquare { x: i32, y: i32, w: i32, h: i32, border_color: Color, fill_color: Color },
    DrawText { x: i32, y: i32, text: String, color: Color },
}

#[derive(Debug, Clone, Default)]
pub struct DeferredGfxOverlay {
    commands: Vec<OverlayCommand>,
}

impl DeferredGfxOverlay {
    pub fn begin_frame(&mut self) {
        self.commands.clear();
    }

    pub fn push(&mut self, command: OverlayCommand) {
        self.commands.push(command);
    }

    pub fn commands(&self) -> &[OverlayCommand] {
        &self.commands
    }

    pub fn command_count(&self) -> usize {
        self.commands.len()
    }

    pub fn take_commands(&mut self) -> Vec<OverlayCommand> {
        std::mem::take(&mut self.commands)
    }
}