pub mod data_harvester;
use data_harvester::{processes, temperature};
use std::time::Instant;

pub mod data_farmer;
use data_farmer::*;

use crate::{canvas, constants, utils::error::Result};

mod process_killer;

#[derive(Debug, Clone, Copy)]
pub enum WidgetPosition {
	Cpu,
	Mem,
	Disk,
	Temp,
	Network,
	Process,
	ProcessSearch,
}

#[derive(Debug)]
pub enum ScrollDirection {
	// UP means scrolling up --- this usually DECREMENTS
	UP,
	// DOWN means scrolling down --- this usually INCREMENTS
	DOWN,
}

/// AppScrollWidgetState deals with fields for a scrollable app's current state.
#[derive(Default)]
pub struct AppScrollWidgetState {
	pub current_scroll_position: u64,
	pub previous_scroll_position: u64,
}

pub struct AppScrollState {
	pub scroll_direction: ScrollDirection,
	pub process_scroll_state: AppScrollWidgetState,
	pub disk_scroll_state: AppScrollWidgetState,
	pub temp_scroll_state: AppScrollWidgetState,
	pub cpu_scroll_state: AppScrollWidgetState,
}

impl Default for AppScrollState {
	fn default() -> Self {
		AppScrollState {
			scroll_direction: ScrollDirection::DOWN,
			process_scroll_state: AppScrollWidgetState::default(),
			disk_scroll_state: AppScrollWidgetState::default(),
			temp_scroll_state: AppScrollWidgetState::default(),
			cpu_scroll_state: AppScrollWidgetState::default(),
		}
	}
}

/// AppSearchState deals with generic searching (I might do this in the future).
pub struct AppSearchState {
	pub is_enabled: bool,
	current_search_query: String,
	current_regex: Option<std::result::Result<regex::Regex, regex::Error>>,
	current_cursor_position: usize,
	pub is_blank_search: bool,
	pub is_invalid_search: bool,
}

impl Default for AppSearchState {
	fn default() -> Self {
		AppSearchState {
			is_enabled: false,
			current_search_query: String::default(),
			current_regex: None,
			current_cursor_position: 0,
			is_invalid_search: false,
			is_blank_search: true,
		}
	}
}

impl AppSearchState {
	pub fn is_invalid_or_blank_search(&self) -> bool {
		self.is_blank_search || self.is_invalid_search
	}
}

/// ProcessSearchState only deals with process' search's current settings and state.
pub struct ProcessSearchState {
	pub search_state: AppSearchState,
	pub is_searching_with_pid: bool,
	pub is_ignoring_case: bool,
	pub is_searching_whole_word: bool,
	pub is_searching_with_regex: bool,
}

impl Default for ProcessSearchState {
	fn default() -> Self {
		ProcessSearchState {
			search_state: AppSearchState::default(),
			is_searching_with_pid: false,
			is_ignoring_case: true,
			is_searching_whole_word: false,
			is_searching_with_regex: false,
		}
	}
}

impl ProcessSearchState {
	pub fn toggle_ignore_case(&mut self) {
		self.is_ignoring_case = !self.is_ignoring_case;
	}

	pub fn toggle_search_whole_word(&mut self) {
		self.is_searching_whole_word = !self.is_searching_whole_word;
	}

	pub fn toggle_search_regex(&mut self) {
		self.is_searching_with_regex = !self.is_searching_with_regex;
	}
}

#[derive(Default)]
pub struct AppDeleteDialogState {
	pub is_showing_dd: bool,
	pub is_on_yes: bool, // Defaults to "No"
}

pub enum AppHelpCategory {
	General,
	Process,
	Search,
}

pub struct AppHelpDialogState {
	pub is_showing_help: bool,
	pub current_category: AppHelpCategory,
}

impl Default for AppHelpDialogState {
	fn default() -> Self {
		AppHelpDialogState {
			is_showing_help: false,
			current_category: AppHelpCategory::General,
		}
	}
}

/// AppConfigFields is meant to cover basic fields that would normally be set
/// by config files or launch options.  Don't need to be mutable (set and forget).
pub struct AppConfigFields {
	pub update_rate_in_milliseconds: u64,
	pub temperature_type: temperature::TemperatureType,
	pub use_dot: bool,
	pub left_legend: bool,
	pub show_average_cpu: bool,
	pub use_current_cpu_total: bool,
	pub show_disabled_data: bool,
}

/// Network specific
pub struct NetworkState {
	pub is_showing_tray: bool,
	pub is_showing_rx: bool,
	pub is_showing_tx: bool,
	pub zoom_level: f64,
}

impl Default for NetworkState {
	fn default() -> Self {
		NetworkState {
			is_showing_tray: false,
			is_showing_rx: true,
			is_showing_tx: true,
			zoom_level: 100.0,
		}
	}
}

/// CPU specific
pub struct CpuState {
	pub is_showing_tray: bool,
	pub zoom_level: f64,
	pub core_show_vec: Vec<bool>,
}

impl Default for CpuState {
	fn default() -> Self {
		CpuState {
			is_showing_tray: false,
			zoom_level: 100.0,
			core_show_vec: Vec::new(),
		}
	}
}

/// Memory specific
pub struct MemState {
	pub is_showing_tray: bool,
	pub is_showing_ram: bool,
	pub is_showing_swap: bool,
	pub zoom_level: f64,
}

impl Default for MemState {
	fn default() -> Self {
		MemState {
			is_showing_tray: false,
			is_showing_ram: true,
			is_showing_swap: true,
			zoom_level: 100.0,
		}
	}
}

pub struct App {
	pub process_sorting_type: processes::ProcessSorting,
	pub process_sorting_reverse: bool,
	pub update_process_gui: bool,
	pub app_scroll_positions: AppScrollState,
	pub current_widget_selected: WidgetPosition,
	pub data: data_harvester::Data,
	awaiting_second_char: bool,
	second_char: Option<char>,
	pub dd_err: Option<String>,
	to_delete_process_list: Option<(String, Vec<u32>)>,
	pub is_frozen: bool,
	last_key_press: Instant,
	pub canvas_data: canvas::DisplayableData,
	enable_grouping: bool,
	pub data_collection: DataCollection,
	pub process_search_state: ProcessSearchState,
	pub delete_dialog_state: AppDeleteDialogState,
	pub help_dialog_state: AppHelpDialogState,
	pub app_config_fields: AppConfigFields,
	pub is_expanded: bool,
	pub is_resized: bool,
	pub cpu_state: CpuState,
	pub mem_state: MemState,
	pub net_state: NetworkState,
}

impl App {
	#[allow(clippy::too_many_arguments)]
	pub fn new(
		show_average_cpu: bool, temperature_type: temperature::TemperatureType,
		update_rate_in_milliseconds: u64, use_dot: bool, left_legend: bool,
		use_current_cpu_total: bool, current_widget_selected: WidgetPosition,
		show_disabled_data: bool,
	) -> App {
		App {
			process_sorting_type: processes::ProcessSorting::CPU,
			process_sorting_reverse: true,
			update_process_gui: false,
			current_widget_selected,
			app_scroll_positions: AppScrollState::default(),
			data: data_harvester::Data::default(),
			awaiting_second_char: false,
			second_char: None,
			dd_err: None,
			to_delete_process_list: None,
			is_frozen: false,
			last_key_press: Instant::now(),
			canvas_data: canvas::DisplayableData::default(),
			enable_grouping: false,
			data_collection: DataCollection::default(),
			process_search_state: ProcessSearchState::default(),
			delete_dialog_state: AppDeleteDialogState::default(),
			help_dialog_state: AppHelpDialogState::default(),
			app_config_fields: AppConfigFields {
				show_average_cpu,
				temperature_type,
				use_dot,
				update_rate_in_milliseconds,
				left_legend,
				use_current_cpu_total,
				show_disabled_data,
			},
			is_expanded: false,
			is_resized: false,
			cpu_state: CpuState::default(),
			mem_state: MemState::default(),
			net_state: NetworkState::default(),
		}
	}

	pub fn reset(&mut self) {
		self.reset_multi_tap_keys();
		self.help_dialog_state.is_showing_help = false;
		self.delete_dialog_state.is_showing_dd = false;
		if self.process_search_state.search_state.is_enabled {
			self.current_widget_selected = WidgetPosition::Process;
			self.process_search_state.search_state.is_enabled = false;
		}
		self.process_search_state.search_state.current_search_query = String::new();
		self.process_search_state.is_searching_with_pid = false;
		self.to_delete_process_list = None;
		self.dd_err = None;
	}

	pub fn on_esc(&mut self) {
		self.reset_multi_tap_keys();
		if self.is_in_dialog() {
			self.help_dialog_state.is_showing_help = false;
			self.help_dialog_state.current_category = AppHelpCategory::General;
			self.delete_dialog_state.is_showing_dd = false;
			self.delete_dialog_state.is_on_yes = false;
			self.to_delete_process_list = None;
			self.dd_err = None;
		} else if self.is_filtering_or_searching() {
			match self.current_widget_selected {
				WidgetPosition::Process | WidgetPosition::ProcessSearch => {
					if self.process_search_state.search_state.is_enabled {
						self.current_widget_selected = WidgetPosition::Process;
						self.process_search_state.search_state.is_enabled = false;
					}
				}
				WidgetPosition::Cpu => {
					self.cpu_state.is_showing_tray = false;
				}
				WidgetPosition::Mem => {
					self.mem_state.is_showing_tray = false;
				}
				WidgetPosition::Network => {
					self.net_state.is_showing_tray = false;
				}
				_ => {}
			}
		} else if self.is_expanded {
			self.is_expanded = false;
			self.is_resized = true;
		}
	}

	fn is_filtering_or_searching(&self) -> bool {
		match self.current_widget_selected {
			WidgetPosition::Cpu => self.cpu_state.is_showing_tray,
			WidgetPosition::Mem => self.mem_state.is_showing_tray,
			WidgetPosition::Network => self.net_state.is_showing_tray,
			WidgetPosition::Process | WidgetPosition::ProcessSearch => {
				self.process_search_state.search_state.is_enabled
			}
			_ => false,
		}
	}

	fn reset_multi_tap_keys(&mut self) {
		self.awaiting_second_char = false;
		self.second_char = None;
	}

	fn is_in_dialog(&self) -> bool {
		self.help_dialog_state.is_showing_help || self.delete_dialog_state.is_showing_dd
	}

	pub fn toggle_grouping(&mut self) {
		// Disallow usage whilst in a dialog and only in processes
		if !self.is_in_dialog() {
			if let WidgetPosition::Process = self.current_widget_selected {
				self.enable_grouping = !(self.enable_grouping);
				self.update_process_gui = true;
			}
		}
	}

	pub fn on_tab(&mut self) {
		match self.current_widget_selected {
			WidgetPosition::Process => {
				self.toggle_grouping();
				if self.is_grouped() {
					self.search_with_name();
				} else {
					self.update_process_gui = true;
				}
			}
			WidgetPosition::ProcessSearch => {
				if !self.is_grouped() {
					if self.process_search_state.is_searching_with_pid {
						self.search_with_name();
					} else {
						self.search_with_pid();
					}
				}
			}
			_ => {}
		}
	}

	pub fn is_grouped(&self) -> bool {
		self.enable_grouping
	}

	pub fn on_space(&mut self) {
		match self.current_widget_selected {
			WidgetPosition::Cpu => {
				let curr_posn = self
					.app_scroll_positions
					.cpu_scroll_state
					.current_scroll_position;
				if self.cpu_state.is_showing_tray
					&& curr_posn < self.data_collection.cpu_harvest.len() as u64
				{
					self.cpu_state.core_show_vec[curr_posn as usize] =
						!self.cpu_state.core_show_vec[curr_posn as usize];
				}
			}
			WidgetPosition::Network => {}
			_ => {}
		}
	}

	pub fn on_slash(&mut self) {
		if !self.is_in_dialog() {
			match self.current_widget_selected {
				WidgetPosition::Process | WidgetPosition::ProcessSearch => {
					// Toggle on
					self.process_search_state.search_state.is_enabled = true;
					self.current_widget_selected = WidgetPosition::ProcessSearch;
					if self.is_grouped() {
						self.search_with_name();
					}
				}
				WidgetPosition::Cpu => {
					self.cpu_state.is_showing_tray = true;
				}
				// WidgetPosition::Mem => {
				// 	self.mem_state.is_showing_tray = true;
				// }
				// WidgetPosition::Network => {
				// 	self.net_state.is_showing_tray = true;
				// }
				_ => {}
			}
		}
	}

	pub fn is_searching(&self) -> bool {
		self.process_search_state.search_state.is_enabled
	}

	pub fn is_in_search_widget(&self) -> bool {
		if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			true
		} else {
			false
		}
	}

	pub fn search_with_pid(&mut self) {
		if !self.is_in_dialog() && self.is_searching() {
			self.process_search_state.is_searching_with_pid = true;
			self.update_process_gui = true;
		}
	}

	pub fn search_with_name(&mut self) {
		if !self.is_in_dialog() && self.is_searching() {
			self.process_search_state.is_searching_with_pid = false;
			self.update_process_gui = true;
		}
	}

	pub fn get_current_search_query(&self) -> &String {
		&self.process_search_state.search_state.current_search_query
	}

	pub fn update_regex(&mut self) {
		if self
			.process_search_state
			.search_state
			.current_search_query
			.is_empty()
		{
			self.process_search_state.search_state.is_invalid_search = false;
			self.process_search_state.search_state.is_blank_search = true;
		} else {
			let regex_string = &self.process_search_state.search_state.current_search_query;
			let escaped_regex: String;
			let final_regex_string = &format!(
				"{}{}{}{}",
				if self.process_search_state.is_searching_whole_word {
					"^"
				} else {
					""
				},
				if self.process_search_state.is_ignoring_case {
					"(?i)"
				} else {
					""
				},
				if !self.process_search_state.is_searching_with_regex {
					escaped_regex = regex::escape(regex_string);
					&escaped_regex
				} else {
					regex_string
				},
				if self.process_search_state.is_searching_whole_word {
					"$"
				} else {
					""
				},
			);

			let new_regex = regex::Regex::new(final_regex_string);
			self.process_search_state.search_state.is_blank_search = false;
			self.process_search_state.search_state.is_invalid_search = new_regex.is_err();

			self.process_search_state.search_state.current_regex = Some(new_regex);
		}
		self.app_scroll_positions
			.process_scroll_state
			.previous_scroll_position = 0;
		self.app_scroll_positions
			.process_scroll_state
			.current_scroll_position = 0;
	}

	pub fn get_cursor_position(&self) -> usize {
		self.process_search_state
			.search_state
			.current_cursor_position
	}

	/// One of two functions allowed to run while in a dialog...
	pub fn on_enter(&mut self) {
		if self.delete_dialog_state.is_showing_dd {
			if self.delete_dialog_state.is_on_yes {
				// If within dd...
				if self.dd_err.is_none() {
					// Also ensure that we didn't just fail a dd...
					let dd_result = self.kill_highlighted_process();
					self.delete_dialog_state.is_on_yes = false;

					// Check if there was an issue... if so, inform the user.
					if let Err(dd_err) = dd_result {
						self.dd_err = Some(dd_err.to_string());
					} else {
						self.delete_dialog_state.is_showing_dd = false;
					}
				}
			} else {
				self.delete_dialog_state.is_showing_dd = false;
			}
		} else if !self.is_in_dialog() {
			// Pop-out mode.  We ignore if in process search.

			match self.current_widget_selected {
				WidgetPosition::ProcessSearch => {}
				_ => {
					self.is_expanded = true;
					self.is_resized = true;
				}
			}
		}
	}

	pub fn on_delete(&mut self) {
		match self.current_widget_selected {
			WidgetPosition::Process => self.start_dd(),
			WidgetPosition::ProcessSearch => {
				if self.process_search_state.search_state.is_enabled
					&& self
						.process_search_state
						.search_state
						.current_cursor_position < self
						.process_search_state
						.search_state
						.current_search_query
						.len()
				{
					self.process_search_state
						.search_state
						.current_search_query
						.remove(
							self.process_search_state
								.search_state
								.current_cursor_position,
						);

					self.update_regex();
					self.update_process_gui = true;
				}
			}
			_ => {}
		}
	}

	/// Deletes an entire word till the next space or end
	#[allow(unused_variables)]
	pub fn on_skip_backspace(&mut self) {
		if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			if self.process_search_state.search_state.is_enabled {
				// Starting from the current position, work backwards on each char until we hit whitespace
				let search_chars = self
					.process_search_state
					.search_state
					.current_search_query
					.chars();
			}
		}
	}

	pub fn clear_search(&mut self) {
		if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			self.process_search_state
				.search_state
				.current_cursor_position = 0;
			self.process_search_state.search_state.current_search_query = String::default();
			self.process_search_state.search_state.is_blank_search = true;
			self.process_search_state.search_state.is_invalid_search = false;
			self.update_process_gui = true;
		}
	}

	pub fn on_backspace(&mut self) {
		if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			if self.process_search_state.search_state.is_enabled
				&& self
					.process_search_state
					.search_state
					.current_cursor_position
					> 0
			{
				self.process_search_state
					.search_state
					.current_cursor_position -= 1;
				self.process_search_state
					.search_state
					.current_search_query
					.remove(
						self.process_search_state
							.search_state
							.current_cursor_position,
					);

				self.update_regex();
				self.update_process_gui = true;
			}
		}
	}

	pub fn get_current_regex_matcher(
		&self,
	) -> &Option<std::result::Result<regex::Regex, regex::Error>> {
		&self.process_search_state.search_state.current_regex
	}

	pub fn on_up_key(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			} else {
				self.decrement_position_count();
			}
		}
	}

	pub fn on_down_key(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
			} else {
				self.increment_position_count();
			}
		}
	}

	pub fn on_left_key(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
				if self
					.process_search_state
					.search_state
					.current_cursor_position
					> 0
				{
					self.process_search_state
						.search_state
						.current_cursor_position -= 1;
				}
			}
		} else if self.delete_dialog_state.is_showing_dd && !self.delete_dialog_state.is_on_yes {
			self.delete_dialog_state.is_on_yes = true;
		}
	}

	pub fn on_right_key(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
				if self
					.process_search_state
					.search_state
					.current_cursor_position
					< self
						.process_search_state
						.search_state
						.current_search_query
						.len()
				{
					self.process_search_state
						.search_state
						.current_cursor_position += 1;
				}
			}
		} else if self.delete_dialog_state.is_showing_dd && self.delete_dialog_state.is_on_yes {
			self.delete_dialog_state.is_on_yes = false;
		}
	}

	pub fn skip_cursor_beginning(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
				self.process_search_state
					.search_state
					.current_cursor_position = 0;
			}
		}
	}

	pub fn skip_cursor_end(&mut self) {
		if !self.is_in_dialog() {
			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
				self.process_search_state
					.search_state
					.current_cursor_position = self
					.process_search_state
					.search_state
					.current_search_query
					.len();
			}
		}
	}

	pub fn start_dd(&mut self) {
		if self
			.app_scroll_positions
			.process_scroll_state
			.current_scroll_position
			< self.canvas_data.finalized_process_data.len() as u64
		{
			let current_process = if self.is_grouped() {
				let group_pids = &self.canvas_data.finalized_process_data[self
					.app_scroll_positions
					.process_scroll_state
					.current_scroll_position
					as usize]
					.group_pids;

				let mut ret = ("".to_string(), group_pids.clone());

				for pid in group_pids {
					if let Some(process) = self.canvas_data.process_data.get(&pid) {
						ret.0 = process.name.clone();
						break;
					}
				}
				ret
			} else {
				let process = self.canvas_data.finalized_process_data[self
					.app_scroll_positions
					.process_scroll_state
					.current_scroll_position
					as usize]
					.clone();
				(process.name.clone(), vec![process.pid])
			};

			self.to_delete_process_list = Some(current_process);
			self.delete_dialog_state.is_showing_dd = true;
		}

		self.reset_multi_tap_keys();
	}

	pub fn on_char_key(&mut self, caught_char: char) {
		// Forbid any char key presses when showing a dialog box...
		if !self.is_in_dialog() {
			let current_key_press_inst = Instant::now();
			if current_key_press_inst
				.duration_since(self.last_key_press)
				.as_millis() > constants::MAX_KEY_TIMEOUT_IN_MILLISECONDS
			{
				self.reset_multi_tap_keys();
			}
			self.last_key_press = current_key_press_inst;

			if let WidgetPosition::ProcessSearch = self.current_widget_selected {
				self.process_search_state
					.search_state
					.current_search_query
					.insert(
						self.process_search_state
							.search_state
							.current_cursor_position,
						caught_char,
					);
				self.process_search_state
					.search_state
					.current_cursor_position += 1;

				self.update_regex();
				self.update_process_gui = true;
			} else {
				match caught_char {
					'/' => {
						self.on_slash();
					}
					'd' => {
						if let WidgetPosition::Process = self.current_widget_selected {
							let mut is_first_d = true;
							if let Some(second_char) = self.second_char {
								if self.awaiting_second_char && second_char == 'd' {
									is_first_d = false;
									self.awaiting_second_char = false;
									self.second_char = None;

									self.start_dd();
								}
							}

							if is_first_d {
								self.awaiting_second_char = true;
								self.second_char = Some('d');
							}
						}
					}
					'g' => {
						let mut is_first_g = true;
						if let Some(second_char) = self.second_char {
							if self.awaiting_second_char && second_char == 'g' {
								is_first_g = false;
								self.awaiting_second_char = false;
								self.second_char = None;
								self.skip_to_first();
							}
						}

						if is_first_g {
							self.awaiting_second_char = true;
							self.second_char = Some('g');
						}
					}
					'G' => self.skip_to_last(),
					'k' => self.decrement_position_count(),
					'j' => self.increment_position_count(),
					'f' => {
						self.is_frozen = !self.is_frozen;
					}
					'c' => {
						match self.process_sorting_type {
							processes::ProcessSorting::CPU => {
								self.process_sorting_reverse = !self.process_sorting_reverse
							}
							_ => {
								self.process_sorting_type = processes::ProcessSorting::CPU;
								self.process_sorting_reverse = true;
							}
						}
						self.update_process_gui = true;
						self.app_scroll_positions
							.process_scroll_state
							.current_scroll_position = 0;
					}
					'm' => {
						match self.process_sorting_type {
							processes::ProcessSorting::MEM => {
								self.process_sorting_reverse = !self.process_sorting_reverse
							}
							_ => {
								self.process_sorting_type = processes::ProcessSorting::MEM;
								self.process_sorting_reverse = true;
							}
						}
						self.update_process_gui = true;
						self.app_scroll_positions
							.process_scroll_state
							.current_scroll_position = 0;
					}
					'p' => {
						// Disable if grouping
						if !self.enable_grouping {
							match self.process_sorting_type {
								processes::ProcessSorting::PID => {
									self.process_sorting_reverse = !self.process_sorting_reverse
								}
								_ => {
									self.process_sorting_type = processes::ProcessSorting::PID;
									self.process_sorting_reverse = false;
								}
							}
							self.update_process_gui = true;
							self.app_scroll_positions
								.process_scroll_state
								.current_scroll_position = 0;
						}
					}
					'n' => {
						match self.process_sorting_type {
							processes::ProcessSorting::NAME => {
								self.process_sorting_reverse = !self.process_sorting_reverse
							}
							_ => {
								self.process_sorting_type = processes::ProcessSorting::NAME;
								self.process_sorting_reverse = false;
							}
						}
						self.update_process_gui = true;
						self.app_scroll_positions
							.process_scroll_state
							.current_scroll_position = 0;
					}
					'?' => {
						self.help_dialog_state.is_showing_help = true;
					}
					'H' => self.move_widget_selection_left(),
					'L' => self.move_widget_selection_right(),
					'K' => self.move_widget_selection_up(),
					'J' => self.move_widget_selection_down(),
					' ' => self.on_space(),
					_ => {}
				}

				if let Some(second_char) = self.second_char {
					if self.awaiting_second_char && caught_char != second_char {
						self.awaiting_second_char = false;
					}
				}
			}
		} else if self.help_dialog_state.is_showing_help {
			match caught_char {
				'1' => self.help_dialog_state.current_category = AppHelpCategory::General,
				'2' => self.help_dialog_state.current_category = AppHelpCategory::Process,
				'3' => self.help_dialog_state.current_category = AppHelpCategory::Search,
				_ => {}
			}
		}
	}

	pub fn kill_highlighted_process(&mut self) -> Result<()> {
		// Technically unnecessary but this is a good check...
		if let WidgetPosition::Process = self.current_widget_selected {
			if let Some(current_selected_processes) = &(self.to_delete_process_list) {
				for pid in &current_selected_processes.1 {
					process_killer::kill_process_given_pid(*pid)?;
				}
			}
			self.to_delete_process_list = None;
		}
		Ok(())
	}

	pub fn get_to_delete_processes(&self) -> Option<(String, Vec<u32>)> {
		self.to_delete_process_list.clone()
	}

	// For now, these are hard coded --- in the future, they shouldn't be!
	//
	// General idea for now:
	// CPU -(down)> MEM
	// MEM -(down)> Network, -(right)> TEMP
	// TEMP -(down)> Disk, -(left)> MEM, -(up)> CPU
	// Disk -(down)> Processes, -(left)> MEM, -(up)> TEMP
	// Network -(up)> MEM, -(right)> PROC
	// PROC -(up)> Disk, -(down)> PROC_SEARCH, -(left)> Network
	// PROC_SEARCH -(up)> PROC, -(left)> Network
	pub fn move_widget_selection_left(&mut self) {
		if !self.is_in_dialog() && !self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::Process => WidgetPosition::Network,
				WidgetPosition::ProcessSearch => WidgetPosition::Network,
				WidgetPosition::Disk => WidgetPosition::Mem,
				WidgetPosition::Temp => WidgetPosition::Mem,
				_ => self.current_widget_selected,
			};
		}

		self.reset_multi_tap_keys();
	}

	pub fn move_widget_selection_right(&mut self) {
		if !self.is_in_dialog() && !self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::Mem => WidgetPosition::Temp,
				WidgetPosition::Network => WidgetPosition::Process,
				_ => self.current_widget_selected,
			};
		}

		self.reset_multi_tap_keys();
	}

	pub fn move_widget_selection_up(&mut self) {
		if !self.is_in_dialog() && !self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::Mem => WidgetPosition::Cpu,
				WidgetPosition::Network => WidgetPosition::Mem,
				WidgetPosition::Process => WidgetPosition::Disk,
				WidgetPosition::ProcessSearch => WidgetPosition::Process,
				WidgetPosition::Temp => WidgetPosition::Cpu,
				WidgetPosition::Disk => WidgetPosition::Temp,
				_ => self.current_widget_selected,
			};
		} else if self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::ProcessSearch => WidgetPosition::Process,
				_ => self.current_widget_selected,
			};
		}

		self.reset_multi_tap_keys();
	}

	pub fn move_widget_selection_down(&mut self) {
		if !self.is_in_dialog() && !self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::Cpu => WidgetPosition::Mem,
				WidgetPosition::Mem => WidgetPosition::Network,
				WidgetPosition::Temp => WidgetPosition::Disk,
				WidgetPosition::Disk => WidgetPosition::Process,
				WidgetPosition::Process => {
					if self.is_searching() {
						WidgetPosition::ProcessSearch
					} else {
						WidgetPosition::Process
					}
				}
				_ => self.current_widget_selected,
			};
		} else if self.is_expanded {
			self.current_widget_selected = match self.current_widget_selected {
				WidgetPosition::Process => {
					if self.is_searching() {
						WidgetPosition::ProcessSearch
					} else {
						WidgetPosition::Process
					}
				}
				_ => self.current_widget_selected,
			};
		}

		self.reset_multi_tap_keys();
	}

	pub fn skip_to_first(&mut self) {
		if !self.is_in_dialog() {
			match self.current_widget_selected {
				WidgetPosition::Process => {
					self.app_scroll_positions
						.process_scroll_state
						.current_scroll_position = 0
				}
				WidgetPosition::Temp => {
					self.app_scroll_positions
						.temp_scroll_state
						.current_scroll_position = 0
				}
				WidgetPosition::Disk => {
					self.app_scroll_positions
						.disk_scroll_state
						.current_scroll_position = 0
				}
				WidgetPosition::Cpu => {
					self.app_scroll_positions
						.cpu_scroll_state
						.current_scroll_position = 0
				}

				_ => {}
			}
			self.app_scroll_positions.scroll_direction = ScrollDirection::UP;
			self.reset_multi_tap_keys();
		}
	}

	pub fn skip_to_last(&mut self) {
		if !self.is_in_dialog() {
			match self.current_widget_selected {
				WidgetPosition::Process => {
					self.app_scroll_positions
						.process_scroll_state
						.current_scroll_position = self.canvas_data.finalized_process_data.len() as u64 - 1
				}
				WidgetPosition::Temp => {
					self.app_scroll_positions
						.temp_scroll_state
						.current_scroll_position = self.canvas_data.temp_sensor_data.len() as u64 - 1
				}
				WidgetPosition::Disk => {
					self.app_scroll_positions
						.disk_scroll_state
						.current_scroll_position = self.canvas_data.disk_data.len() as u64 - 1
				}
				WidgetPosition::Cpu => {
					self.app_scroll_positions
						.cpu_scroll_state
						.current_scroll_position = self.canvas_data.cpu_data.len() as u64 - 1;
				}
				_ => {}
			}
			self.app_scroll_positions.scroll_direction = ScrollDirection::DOWN;
			self.reset_multi_tap_keys();
		}
	}

	pub fn decrement_position_count(&mut self) {
		if !self.is_in_dialog() {
			match self.current_widget_selected {
				WidgetPosition::Process => self.change_process_position(-1),
				WidgetPosition::Temp => self.change_temp_position(-1),
				WidgetPosition::Disk => self.change_disk_position(-1),
				WidgetPosition::Cpu => self.change_cpu_table_position(-1), // TODO: [PO?] Temporary, may change if we add scaling
				_ => {}
			}
			self.app_scroll_positions.scroll_direction = ScrollDirection::UP;
			self.reset_multi_tap_keys();
		}
	}

	pub fn increment_position_count(&mut self) {
		if !self.is_in_dialog() {
			match self.current_widget_selected {
				WidgetPosition::Process => self.change_process_position(1),
				WidgetPosition::Temp => self.change_temp_position(1),
				WidgetPosition::Disk => self.change_disk_position(1),
				WidgetPosition::Cpu => self.change_cpu_table_position(1), // TODO: [PO?] Temporary, may change if we add scaling
				_ => {}
			}
			self.app_scroll_positions.scroll_direction = ScrollDirection::DOWN;
			self.reset_multi_tap_keys();
		}
	}

	fn change_cpu_table_position(&mut self, num_to_change_by: i64) {
		let current_posn = self
			.app_scroll_positions
			.cpu_scroll_state
			.current_scroll_position;

		if current_posn as i64 + num_to_change_by >= 0
			&& current_posn as i64 + num_to_change_by < self.canvas_data.cpu_data.len() as i64
		{
			self.app_scroll_positions
				.cpu_scroll_state
				.current_scroll_position = (current_posn as i64 + num_to_change_by) as u64;
		}
	}

	fn change_process_position(&mut self, num_to_change_by: i64) {
		let current_posn = self
			.app_scroll_positions
			.process_scroll_state
			.current_scroll_position;

		if current_posn as i64 + num_to_change_by >= 0
			&& current_posn as i64 + num_to_change_by
				< self.canvas_data.finalized_process_data.len() as i64
		{
			self.app_scroll_positions
				.process_scroll_state
				.current_scroll_position = (current_posn as i64 + num_to_change_by) as u64;
		}
	}

	fn change_temp_position(&mut self, num_to_change_by: i64) {
		let current_posn = self
			.app_scroll_positions
			.temp_scroll_state
			.current_scroll_position;

		if current_posn as i64 + num_to_change_by >= 0
			&& current_posn as i64 + num_to_change_by
				< self.canvas_data.temp_sensor_data.len() as i64
		{
			self.app_scroll_positions
				.temp_scroll_state
				.current_scroll_position = (current_posn as i64 + num_to_change_by) as u64;
		}
	}

	fn change_disk_position(&mut self, num_to_change_by: i64) {
		let current_posn = self
			.app_scroll_positions
			.disk_scroll_state
			.current_scroll_position;

		if current_posn as i64 + num_to_change_by >= 0
			&& current_posn as i64 + num_to_change_by < self.canvas_data.disk_data.len() as i64
		{
			self.app_scroll_positions
				.disk_scroll_state
				.current_scroll_position = (current_posn as i64 + num_to_change_by) as u64;
		}
	}
}