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use crate::app::{App, AppResult, DEFAULT_TEXT_WIDTH_PERCENT, FULL_TEXT_WIDTH_PERCENT};
use crate::config::AppConfig;
#[derive(Debug, Copy, Clone)]
pub struct KeyDown {
	pub code: KeyCode,
	pub mods: KeyModifiers,
}
#[derive(Debug, Copy, Clone)]
pub enum KeyCode {
	Char(char),
	Up,
	Down,
	Left,
	Right,
	Esc,
	Unimplemented,
}
#[derive(Debug, Copy, Clone)]
pub enum KeyModifiers {
	Ctrl,
	Unimplemented,
}

impl App {
	pub fn handle_key_events(&mut self, config: &AppConfig, key_press: KeyDown) -> AppResult<()> {
		use KeyCode as C;
		use KeyModifiers as M;
		match (key_press.mods, key_press.code) {
			(M::Ctrl, C::Char('c')) => self.quit()?,
			(M::Ctrl, C::Char('f')) => {
				self.full_text_width = !self.full_text_width;
				self.text_width_percent = if self.full_text_width {
					FULL_TEXT_WIDTH_PERCENT
				} else {
					DEFAULT_TEXT_WIDTH_PERCENT
				};
				self.generate_lines()
			}
			(_, C::Char(c)) => self.handle_char(config, c)?,
			(M::Ctrl, C::Up) => {
				self.display_line = self.display_line.checked_sub(10).unwrap_or_default();
			}
			(M::Ctrl, C::Down) => {
				self.display_line += 10;
			}
			(_, C::Up) => {
				self.display_line = self.display_line.checked_sub(1).unwrap_or_default();
			}
			(_, C::Down) => {
				self.display_line += 1;
			}
			(_, C::Esc) => {
				let &(cur_line, _) = self.line_index.get(self.sample_start_index + self.text.cur_char).unwrap();
				self.display_line = cur_line
			}
			_ => {}
		}
		Ok(())
	}
}