oxwm

use super::{Overlay, OverlayBase};

use crate::bar::font::Font;

use crate::errors::X11Error;

use x11rb::connection::Connection;

use x11rb::protocol::xproto::*;

use x11rb::rust_connection::RustConnection;

const PADDING: i16 = 20;

const LINE_SPACING: i16 = 5;

const BORDER_WIDTH: u16 = 2;

const BORDER_COLOR: u32 = 0xff5555;

pub struct ErrorOverlay {

    base: OverlayBase,

    lines: Vec<String>,

}

impl ErrorOverlay {

    pub fn new(

        connection: &RustConnection,

        screen: &Screen,

        screen_num: usize,

        display: *mut x11::xlib::Display,

        _font: &Font,

        _max_width: u16,

    ) -> Result<Self, X11Error> {

        let base = OverlayBase::new(

            connection,

            screen,

            screen_num,

            display,

            400,

            200,

            BORDER_WIDTH,

            BORDER_COLOR,

            0x1a1a1a,

            0xffffff,

        )?;

        Ok(ErrorOverlay {

            base,

            lines: Vec::new(),

        })

    }

    pub fn show_error(

        &mut self,

        connection: &RustConnection,

        font: &Font,

        error_text: &str,

        monitor_x: i16,

        monitor_y: i16,

        screen_width: u16,

        screen_height: u16,

    ) -> Result<(), X11Error> {

        let max_line_width = (screen_width as i16 / 2 - PADDING * 4).max(300) as u16;

        let error_with_instruction = format!("{}\n\nFix the config file and reload.", error_text);

        self.lines = self.wrap_text(&error_with_instruction, font, max_line_width);

        let mut content_width = 0u16;

        for line in &self.lines {

            let line_width = font.text_width(line);

            if line_width > content_width {

                content_width = line_width;

            }

        }

        let width = content_width + (PADDING as u16 * 2);

        let line_height = font.height() + LINE_SPACING as u16;

        let height = (self.lines.len() as u16 * line_height) + (PADDING as u16 * 2);

        let x = monitor_x + ((screen_width - width) / 2) as i16;

        let y = monitor_y + ((screen_height - height) / 2) as i16;

        self.base.configure(connection, x, y, width, height)?;

        self.base.show(connection)?;

        self.draw(connection, font)?;

        Ok(())

    }

    fn wrap_text(&self, text: &str, font: &Font, max_width: u16) -> Vec<String> {

        let mut lines = Vec::new();

        for paragraph in text.lines() {

            if paragraph.trim().is_empty() {

                lines.push(String::new());

                continue;

            }

            let words: Vec<&str> = paragraph.split_whitespace().collect();

            let mut current_line = String::new();

            for word in words {

                let test_line = if current_line.is_empty() {

                    word.to_string()

                } else {

                    format!("{} {}", current_line, word)

                };

                if font.text_width(&test_line) <= max_width {

                    current_line = test_line;

                } else {

                    if !current_line.is_empty() {

                        lines.push(current_line);

                    }

                    current_line = word.to_string();

                }

            }

            if !current_line.is_empty() {

                lines.push(current_line);

            }

        }

        lines

    }

}

impl Overlay for ErrorOverlay {

    fn window(&self) -> Window {

        self.base.window

    }

    fn is_visible(&self) -> bool {

        self.base.is_visible

    }

    fn hide(&mut self, connection: &RustConnection) -> Result<(), X11Error> {

        self.base.hide(connection)?;

        self.lines.clear();

        Ok(())

    }

    fn draw(&self, connection: &RustConnection, font: &Font) -> Result<(), X11Error> {

        if !self.base.is_visible {

            return Ok(());

        }

        self.base.draw_background(connection)?;

        let line_height = font.height() + LINE_SPACING as u16;

        let mut y = PADDING + font.ascent();

        for line in &self.lines {

            self.base

                .font_draw

                .draw_text(font, self.base.foreground_color, PADDING, y, line);

            y += line_height as i16;

        }

        connection.flush()?;

        Ok(())

    }

}