use crate::{
    style::{RawTransform, Transform},
    utils::{self, hex_ansi_bg},
};

enum RenderMethod {
    Text(String),
    Rectangle(u16, u16, u32),
}

pub struct RenderScope {
    transform: RawTransform,
    render_stack: Vec<RenderMethod>,
    parent_width: u16,
    parent_height: u16,
}

impl RenderScope {
    pub fn new() -> RenderScope {
        RenderScope {
            transform: RawTransform::new(),
            render_stack: Vec::new(),
            parent_width: 0,
            parent_height: 0,
        }
    }

    pub fn set_transform(&mut self, transform: &Transform) {
        (self.parent_width, self.parent_height) = crossterm::terminal::size().unwrap();
        transform.use_dimensions(&mut self.transform);
        transform.use_position(self.parent_width, self.parent_height, &mut self.transform);
    }

    pub fn draw_text(&mut self, text: &str) {
        self.render_stack.push(RenderMethod::Text(text.to_string()));
        let (w, h) = utils::str_size(text);
        self.transform.width = self.transform.width.max(w);
        self.transform.height = self.transform.height.max(h);
    }

    pub fn draw_rect(&mut self, width: u16, height: u16, color: u32) {
        self.render_stack
            .push(RenderMethod::Rectangle(width, height, color));
        self.transform.width = self.transform.width.max(width);
        self.transform.height = self.transform.height.max(height);
    }

    pub fn draw(&self) {
        for m in &self.render_stack {
            match m {
                RenderMethod::Text(t) => {
                    utils::print(self.transform.x, self.transform.y, t);
                }
                RenderMethod::Rectangle(width, height, color) => {
                    utils::print_liner(
                        self.transform.x,
                        self.transform.y,
                        &hex_ansi_bg(*color),
                        &std::iter::repeat(" ".repeat(*width as usize))
                            .take(*height as usize)
                            .collect::<Vec<_>>()
                            .join("\n"),
                    );
                }
            }
        }
    }

    pub fn clear(&mut self) {
        self.render_stack.clear();
        self.transform.width = 0;
        self.transform.height = 0;
    }

    pub fn get_size(&self) -> (u16, u16) {
        (self.transform.width, self.transform.height)
    }

    pub fn get_parent_size(&self) -> (u16, u16) {
        (self.parent_width, self.parent_height)
    }
}