hackatime 1.0.0

use std::{fs, path::PathBuf};

use anyhow::{Context, Result};
use serde::{Deserialize, Serialize};

use crate::storage;

#[derive(Debug, Clone, Serialize, Deserialize)]
struct StoredAuth {
    access_token: String,
}

pub fn load_access_token() -> Result<Option<String>> {
    let path = auth_file_path()?;
    if !path.exists() {
        return Ok(None);
    }

    let contents = fs::read_to_string(&path)
        .with_context(|| format!("failed to read auth file at {}", path.display()))?;
    let auth: StoredAuth = serde_json::from_str(&contents)
        .with_context(|| format!("failed to parse auth file at {}", path.display()))?;
    Ok(Some(auth.access_token))
}

pub fn save_access_token(access_token: &str) -> Result<()> {
    let path = auth_file_path()?;
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).with_context(|| {
            format!(
                "failed to create auth dir at {} (set {} to override the storage location)",
                parent.display(),
                storage::CONFIG_DIR_ENV
            )
        })?;
    }

    let auth = StoredAuth {
        access_token: access_token.to_string(),
    };
    let json = serde_json::to_string_pretty(&auth).context("failed to serialize auth token")?;
    fs::write(&path, json).with_context(|| {
        format!(
            "failed to write auth file at {} (set {} to override the storage location)",
            path.display(),
            storage::CONFIG_DIR_ENV
        )
    })
}

pub fn clear_access_token() -> Result<()> {
    let path = auth_file_path()?;
    if path.exists() {
        fs::remove_file(&path)
            .with_context(|| format!("failed to remove auth file at {}", path.display()))?;
    }
    Ok(())
}

fn auth_file_path() -> Result<PathBuf> {
    Ok(storage::app_config_dir()?.join("auth.json"))
}