use std::{
	fs::{self, File},
	io::Write,
	path::PathBuf,
};

use serde::{Deserialize, Serialize};

use crate::{level::Level, userdata_dir};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Solution {
	solution_id: usize,
	level_id: String,
	pub name: String,
	pub board: String,
	#[serde(default)]
	pub score: Option<Score>,
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Score {
	pub cycles: usize,
	pub tiles: usize,
}

impl Solution {
	pub fn new(level: &Level, id: usize) -> Self {
		Self {
			solution_id: id,
			level_id: level.id().to_owned(),
			name: format!("Unnamed {id}"),
			board: level.init_board().unwrap_or(String::from(" ")),
			score: None,
		}
	}

	pub fn new_copy(&self, id: usize) -> Self {
		let mut new = self.clone();
		new.solution_id = id;
		new.score = None;
		new
	}

	pub fn id(&self) -> usize {
		self.solution_id
	}

	fn path(&self) -> PathBuf {
		let dir = userdata_dir().join("solutions").join(&self.level_id);
		fs::create_dir_all(&dir).unwrap();
		dir.join(format!("solution_{}.json", &self.solution_id))
	}

	pub fn save(&self) {
		let path = self.path();
		let json = serde_json::to_string_pretty(self).unwrap();
		let mut file = File::create(path).unwrap();
		file.write_all(json.as_bytes()).unwrap();
	}

	pub fn remove_file(&self) {
		let path = self.path();
		if let Err(e) = fs::remove_file(path) {
			eprint!("Error removing solution file: {e}");
		}
	}

	pub fn score_text(&self) -> String {
		if let Some(score) = &self.score {
			format!("C: {}   T: {}", score.cycles, score.tiles)
		} else {
			"unsolved".into()
		}
	}
}