oxwm

use super::blocks::Block;

use super::font::{Font, FontDraw};

use crate::Config;

use crate::errors::X11Error;

use std::time::Instant;

use x11rb::COPY_DEPTH_FROM_PARENT;

use x11rb::connection::Connection;

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

use x11rb::rust_connection::RustConnection;

pub struct Bar {

    window: Window,

    width: u16,

    height: u16,

    graphics_context: Gcontext,

    pixmap: x11::xlib::Pixmap,

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

    font_draw: FontDraw,

    tag_widths: Vec<u16>,

    needs_redraw: bool,

    blocks: Vec<Box<dyn Block>>,

    block_last_updates: Vec<Instant>,

    block_underlines: Vec<bool>,

    status_text: String,

    tags: Vec<String>,

    scheme_normal: crate::ColorScheme,

    scheme_occupied: crate::ColorScheme,

    scheme_selected: crate::ColorScheme,

}

impl Bar {

    pub fn new(

        connection: &RustConnection,

        screen: &Screen,

        screen_num: usize,

        config: &Config,

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

        font: &Font,

        x: i16,

        y: i16,

        width: u16,

    ) -> Result<Self, X11Error> {

        let window = connection.generate_id()?;

        let graphics_context = connection.generate_id()?;

        let height = (font.height() as f32 * 1.4) as u16;

        connection.create_window(

            COPY_DEPTH_FROM_PARENT,

            window,

            screen.root,

            x,

            y,

            width,

            height,

            0,

            WindowClass::INPUT_OUTPUT,

            screen.root_visual,

            &CreateWindowAux::new()

                .background_pixel(config.scheme_normal.background)

                .event_mask(EventMask::EXPOSURE | EventMask::BUTTON_PRESS)

                .override_redirect(1),

        )?;

        connection.create_gc(

            graphics_context,

            window,

            &CreateGCAux::new()

                .foreground(config.scheme_normal.foreground)

                .background(config.scheme_normal.background),

        )?;

        connection.map_window(window)?;

        connection.flush()?;

        let visual = unsafe { x11::xlib::XDefaultVisual(display, screen_num as i32) };

        let colormap = unsafe { x11::xlib::XDefaultColormap(display, screen_num as i32) };

        let depth = unsafe { x11::xlib::XDefaultDepth(display, screen_num as i32) };

        let pixmap = unsafe {

            x11::xlib::XCreatePixmap(

                display,

                window as x11::xlib::Drawable,

                width as u32,

                height as u32,

                depth as u32,

            )

        };

        let font_draw = FontDraw::new(display, pixmap, visual, colormap)?;

        let horizontal_padding = (font.height() as f32 * 0.4) as u16;

        let tag_widths = config

            .tags

            .iter()

            .map(|tag| {

                let text_width = font.text_width(tag);

                text_width + (horizontal_padding * 2)

            })

            .collect();

        let blocks: Vec<Box<dyn Block>> = config

            .status_blocks

            .iter()

            .map(|block_config| block_config.to_block())

            .collect();

        let block_underlines: Vec<bool> = config

            .status_blocks

            .iter()

            .map(|block_config| block_config.underline)

            .collect();

        let block_last_updates = vec![Instant::now(); blocks.len()];

        Ok(Bar {

            window,

            width,

            height,

            graphics_context,

            pixmap,

            display,

            font_draw,

            tag_widths,

            needs_redraw: true,

            blocks,

            block_last_updates,

            block_underlines,

            status_text: String::new(),

            tags: config.tags.clone(),

            scheme_normal: config.scheme_normal,

            scheme_occupied: config.scheme_occupied,

            scheme_selected: config.scheme_selected,

        })

    }

    pub fn window(&self) -> Window {

        self.window

    }

    pub fn height(&self) -> u16 {

        self.height

    }

    pub fn invalidate(&mut self) {

        self.needs_redraw = true;

    }

    pub fn update_blocks(&mut self) {

        let now = Instant::now();

        let mut changed = false;

        for (i, block) in self.blocks.iter_mut().enumerate() {

            let elapsed = now.duration_since(self.block_last_updates[i]);

            if elapsed >= block.interval() {

                if block.content().is_ok() {

                    self.block_last_updates[i] = now;

                    changed = true;

                }

            }

        }

        if changed {

            let mut parts = Vec::new();

            for block in &mut self.blocks {

                if let Ok(text) = block.content() {

                    parts.push(text);

                }

            }

            self.status_text = parts.join("");

            self.needs_redraw = true;

        }

    }

    pub fn draw(

        &mut self,

        connection: &RustConnection,

        font: &Font,

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

        current_tags: u32,

        occupied_tags: u32,

        draw_blocks: bool,

        layout_symbol: &str,

        keychord_indicator: Option<&str>,

    ) -> Result<(), X11Error> {

        if !self.needs_redraw {

            return Ok(());

        }

        connection.change_gc(

            self.graphics_context,

            &ChangeGCAux::new().foreground(self.scheme_normal.background),

        )?;

        connection.flush()?;

        unsafe {

            let gc = x11::xlib::XCreateGC(display, self.pixmap, 0, std::ptr::null_mut());

            x11::xlib::XSetForeground(display, gc, self.scheme_normal.background as u64);

            x11::xlib::XFillRectangle(

                display,

                self.pixmap,

                gc,

                0,

                0,

                self.width as u32,

                self.height as u32,

            );

            x11::xlib::XFreeGC(display, gc);

        }

        let mut x_position: i16 = 0;

        for (tag_index, tag) in self.tags.iter().enumerate() {

            let tag_mask = 1 << tag_index;

            let is_selected = (current_tags & tag_mask) != 0;

            let is_occupied = (occupied_tags & tag_mask) != 0;

            let tag_width = self.tag_widths[tag_index];

            let scheme = if is_selected {

                &self.scheme_selected

            } else if is_occupied {

                &self.scheme_occupied

            } else {

                &self.scheme_normal

            };

            let text_width = font.text_width(tag);

            let text_x = x_position + ((tag_width - text_width) / 2) as i16;

            let top_padding = 4;

            let text_y = top_padding + font.ascent();

            self.font_draw

                .draw_text(font, scheme.foreground, text_x, text_y, tag);

            if is_selected {

                let font_height = font.height();

                let underline_height = font_height / 8;

                let bottom_gap = 3;

                let underline_y = self.height as i16 - underline_height as i16 - bottom_gap;

                let underline_padding = 4;

                let underline_width = tag_width - underline_padding;

                let underline_x = x_position + (underline_padding / 2) as i16;

                unsafe {

                    let gc = x11::xlib::XCreateGC(display, self.pixmap, 0, std::ptr::null_mut());

                    x11::xlib::XSetForeground(display, gc, scheme.underline as u64);

                    x11::xlib::XFillRectangle(

                        display,

                        self.pixmap,

                        gc,

                        underline_x as i32,

                        underline_y as i32,

                        underline_width as u32,

                        underline_height as u32,

                    );

                    x11::xlib::XFreeGC(display, gc);

                }

            }

            x_position += tag_width as i16;

        }

        x_position += 10;

        let text_x = x_position;

        let top_padding = 4;

        let text_y = top_padding + font.ascent();

        self.font_draw.draw_text(

            font,

            self.scheme_normal.foreground,

            text_x,

            text_y,

            layout_symbol,

        );

        x_position += font.text_width(layout_symbol) as i16;

        if let Some(indicator) = keychord_indicator {

            x_position += 10;

            let text_x = x_position;

            let text_y = top_padding + font.ascent();

            self.font_draw.draw_text(

                font,

                self.scheme_selected.foreground,

                text_x,

                text_y,

                indicator,

            );

        }

        if draw_blocks && !self.status_text.is_empty() {

            let padding = 10;

            let mut x_position = self.width as i16 - padding;

            for (i, block) in self.blocks.iter_mut().enumerate().rev() {

                if let Ok(text) = block.content() {

                    let text_width = font.text_width(&text);

                    x_position -= text_width as i16;

                    let top_padding = 4;

                    let text_y = top_padding + font.ascent();

                    self.font_draw

                        .draw_text(font, block.color(), x_position, text_y, &text);

                    if self.block_underlines[i] {

                        let font_height = font.height();

                        let underline_height = font_height / 8;

                        let bottom_gap = 3;

                        let underline_y = self.height as i16 - underline_height as i16 - bottom_gap;

                        let underline_padding = 8;

                        let underline_width = text_width + underline_padding;

                        let underline_x = x_position - (underline_padding / 2) as i16;

                        unsafe {

                            let gc = x11::xlib::XCreateGC(display, self.pixmap, 0, std::ptr::null_mut());

                            x11::xlib::XSetForeground(display, gc, block.color() as u64);

                            x11::xlib::XFillRectangle(

                                display,

                                self.pixmap,

                                gc,

                                underline_x as i32,

                                underline_y as i32,

                                underline_width as u32,

                                underline_height as u32,

                            );

                            x11::xlib::XFreeGC(display, gc);

                        }

                    }

                }

            }

        }

        unsafe {

            let gc = x11::xlib::XCreateGC(display, self.window as x11::xlib::Drawable, 0, std::ptr::null_mut());

            x11::xlib::XCopyArea(

                display,

                self.pixmap,

                self.window as x11::xlib::Drawable,

                gc,

                0,

                0,

                self.width as u32,

                self.height as u32,

                0,

                0,

            );

            x11::xlib::XFreeGC(display, gc);

            x11::xlib::XSync(display, 0);

        }

        self.needs_redraw = false;

        Ok(())

    }

    pub fn handle_click(&self, click_x: i16) -> Option<usize> {

        let mut current_x_position = 0;

        for (tag_index, &tag_width) in self.tag_widths.iter().enumerate() {

            if click_x >= current_x_position && click_x < current_x_position + tag_width as i16 {

                return Some(tag_index);

            }

            current_x_position += tag_width as i16;

        }

        None

    }

    pub fn needs_redraw(&self) -> bool {

        self.needs_redraw

    }

    pub fn update_from_config(&mut self, config: &Config) {

        self.blocks = config

            .status_blocks

            .iter()

            .map(|block_config| block_config.to_block())

            .collect();

        self.block_underlines = config

            .status_blocks

            .iter()

            .map(|block_config| block_config.underline)

            .collect();

        self.block_last_updates = vec![Instant::now(); self.blocks.len()];

        self.tags = config.tags.clone();

        self.scheme_normal = config.scheme_normal;

        self.scheme_occupied = config.scheme_occupied;

        self.scheme_selected = config.scheme_selected;

        self.status_text.clear();

        self.needs_redraw = true;

    }

}

impl Drop for Bar {

    fn drop(&mut self) {

        unsafe {

            x11::xlib::XFreePixmap(self.display, self.pixmap);

        }

    }

}