/*
    Hurry Curry! - a game about cooking
    Copyright 2024 metamuffin

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, version 3 of the License only.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/
use anyhow::Result;
use hurrycurry_protocol::Score;
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use tokio::{
    fs::{read_to_string, rename, File},
    io::AsyncWriteExt,
};

#[derive(Debug, Serialize, Deserialize, Clone, Default)]
pub struct ScoreboardStore {
    maps: HashMap<String, Scoreboard>,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct Scoreboard {
    plays: usize,
    best: Vec<ScoreboardEntry>,
}
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct ScoreboardEntry {
    players: Vec<String>,
    score: Score,
}

impl ScoreboardStore {
    pub async fn load() -> Result<Self> {
        let path =
            xdg::BaseDirectories::with_prefix("hurrycurry")?.place_data_file("scoreboards.json")?;
        // TOCTOU because its easier that way
        if !path.exists() {
            ScoreboardStore::default().save().await?;
        }
        let s = read_to_string(path).await?;
        Ok(serde_json::from_str(&s)?)
    }
    pub async fn save(&self) -> Result<()> {
        let path =
            xdg::BaseDirectories::with_prefix("hurrycurry")?.place_data_file("scoreboards.json")?;
        let buffer_path = xdg::BaseDirectories::with_prefix("hurrycurry")?
            .place_data_file("scoreboards.json~")?;
        File::create(&buffer_path)
            .await?
            .write_all(serde_json::to_string(self)?.as_bytes())
            .await?;
        rename(buffer_path, path).await?;
        Ok(())
    }
}