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use crossterm::cursor::MoveTo;
use crossterm::{execute, queue, Output};
use std::io::{stdout, Write};
use crate::entities::{Character, Entity, Player};
use crate::tiling::{tile_to_str, Tile, TileGrid, TileType};
use crate::world::{apply_movement, Dungeon, Generatable, Level, Movement};
const PLAYER_SIGHT: usize = 3;
pub struct State {
pub player: Character,
dungeon: Dungeon,
level: usize,
grid: Option<TileGrid>,
}
impl State {
pub fn new(player: Character, dungeon: Dungeon) -> State {
State {
player,
dungeon,
level: 0,
grid: None,
}
}
pub fn init(&mut self) {
self.dungeon.generate();
self.switch_level(0);
self.player.place(self.current_level().start_point());
self.clear_los()
}
pub fn switch_level(&mut self, num_level: usize) {
self.level = num_level;
self.grid = Some(self.current_level().to_tilegrid().unwrap());
}
pub fn render_level(&self) {
let mut sout = stdout();
execute!(sout, MoveTo(0, 0)).unwrap();
for (linenum, line) in self.grid.as_ref().unwrap().raw_data().iter().enumerate() {
let linestr = line.iter().map(tile_to_str).collect::<Vec<&str>>();
let mut linestr2 = String::from("");
for chr in linestr {
linestr2.push_str(chr);
}
queue!(sout, Output(linestr2), MoveTo(0, linenum as u16)).unwrap();
sout.flush().unwrap();
}
}
fn render_entity(&self, entity: &dyn Entity) {
if !entity.is_visible() || !entity.is_dirty() {
return;
}
let dirt = entity.previous_location();
let background = self.grid.as_ref().unwrap().block_at(dirt.0, dirt.1);
let mut sout = stdout();
queue!(
sout,
MoveTo(dirt.0 as u16, dirt.1 as u16),
Output(tile_to_str(background)),
MoveTo(entity.location().0 as u16, entity.location().1 as u16),
Output(tile_to_str(entity.tile()))
)
.unwrap();
sout.flush().unwrap();
}
pub fn render_entities(&self) {
for e in self.current_level().entities.iter() {
self.render_entity(&**e);
}
}
pub fn render_player(&mut self) {
self.render_entity(&self.player);
}
fn ui_state_position(&self) -> MoveTo {
MoveTo(0, (self.dungeon.ysize()) as u16)
}
fn ui_notification_position(&self) -> MoveTo {
MoveTo(0, (self.dungeon.ysize() + 1) as u16)
}
pub fn render_ui(&self) {
let mut sout = stdout();
queue!(sout, self.ui_state_position(), Output(self.player.stats())).unwrap();
sout.flush().unwrap();
}
pub fn notify(&self, message: String) {
let mut sout = stdout();
queue!(
sout,
self.ui_notification_position(),
Output(" ".repeat(self.dungeon.xsize())),
self.ui_notification_position(),
Output(message)
)
.unwrap();
sout.flush().unwrap();
}
pub fn ui_help(&self) {
self.notify(String::from(
"quit: q, movement{up(k), down(j), left(h), right(l)}",
))
}
pub fn current_level(&self) -> &Level {
&self.dungeon.levels[self.level]
}
pub fn current_level_mut(&mut self) -> &mut Level {
&mut self.dungeon.levels[self.level]
}
fn can_step_on(tile: &Tile) -> bool {
match tile.get_type() {
TileType::Floor => true,
TileType::StairsDown => true,
TileType::StairsUp => true,
_ => false,
}
}
fn clear_los(&mut self) {
{
let grid = self.grid.as_mut().unwrap();
grid.clear_fog_of_war(self.player.location(), PLAYER_SIGHT);
}
for i in 0..self.current_level().entities.len() {
let loc = *self.current_level().entities[i].location();
if self
.grid
.as_ref()
.unwrap()
.block_at(loc.0, loc.1)
.is_visible()
&& !self.current_level().entities[i].is_visible()
{
self.current_level_mut().entities[i].visibility(true);
}
}
}
pub fn move_player(&mut self, dir: Movement) -> Result<(), String> {
let grid = match &self.grid {
Some(g) => g,
None => return Err(String::from("No level loaded!")),
};
let loc = apply_movement(*self.player.location(), dir)?;
// Is the new location colliding with anything?
if !State::can_step_on(grid.block_at(loc.0, loc.1)) {
return Err(String::from("Can't move entity!"));
}
self.player.move_by(dir)?;
self.clear_los();
Ok(())
}
pub fn down_stairs(&mut self) -> Result<(), String> {
let grid = match &self.grid {
Some(g) => g,
None => return Err(String::from("No level loaded!")),
};
if self.level == self.dungeon.depth() - 1 {
return Err(String::from("Already at the bottom level"));
}
let loc = self.player.location();
match grid.block_at(loc.0, loc.1).get_type() {
TileType::StairsDown => {
self.switch_level(self.level + 1);
self.render_level();
Ok(())
}
_ => Err(String::from("Not on stairs!")),
}
}
pub fn up_stairs(&mut self) -> Result<(), String> {
let grid = match &self.grid {
Some(g) => g,
None => return Err(String::from("No level loaded!")),
};
if self.level == 0 {
return Err(String::from("Already at the top level"));
}
let loc = self.player.location();
match grid.block_at(loc.0, loc.1).get_type() {
TileType::StairsUp => {
self.switch_level(self.level - 1);
self.render_level();
Ok(())
}
_ => Err(String::from("Not on stairs!")),
}
}
}
|
