use crate::tui::component::{Action, ClideComponent};
use edtui::{
    EditorEventHandler, EditorState, EditorTheme, EditorView, LineNumbers, SyntaxHighlighter,
};
use ratatui::buffer::Buffer;
use ratatui::crossterm::event::KeyEvent;
use ratatui::layout::{Alignment, Rect};
use ratatui::prelude::{Color, Style};
use ratatui::widgets::{Block, Borders, Padding, Widget};

// TODO: Consider using editor-command https://docs.rs/editor-command/latest/editor_command/
// TODO: Title should be detected programming language name
// TODO: Content should be file contents
// TODO: Vimrc should be used
pub struct Editor {
    pub state: EditorState,
    pub event_handler: EditorEventHandler,
}

impl Editor {
    pub fn new() -> Self {
        Editor {
            state: EditorState::default(),
            event_handler: EditorEventHandler::default(),
        }
    }
}

impl Widget for &mut Editor {
    fn render(self, area: Rect, buf: &mut Buffer)
    where
        Self: Sized,
    {
        // TODO: Use current file extension for syntax highlighting here.
        EditorView::new(&mut self.state)
            .wrap(true)
            .theme(
                EditorTheme::default().block(
                    Block::default()
                        .title("Rust")
                        .title_style(Style::default().fg(Color::Yellow))
                        .title_alignment(Alignment::Right)
                        .borders(Borders::ALL)
                        .padding(Padding::new(0, 0, 0, 1)),
                ),
            )
            .syntax_highlighter(SyntaxHighlighter::new("dracula", "rs").ok())
            .tab_width(2)
            .line_numbers(LineNumbers::Absolute)
            .render(area, buf);
    }
}

impl ClideComponent for Editor {
    fn handle_key_events(&mut self, key: KeyEvent) -> Action {
        self.event_handler.on_key_event(key, &mut self.state);
        Action::Pass
    }
}