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use std::fs;
use std::path::PathBuf;
use serde::{Deserialize, Serialize};
use crate::state::TimerPhase;
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Settings {
pub work_duration_secs: u64,
pub short_break_secs: u64,
pub long_break_secs: u64,
pub sessions_before_long_break: u32,
}
impl Default for Settings {
fn default() -> Self {
Self {
work_duration_secs: 25 * 60,
short_break_secs: 5 * 60,
long_break_secs: 15 * 60,
sessions_before_long_break: 4,
}
}
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Task {
pub id: String,
pub name: String,
pub total_sessions: u32,
pub remaining_sessions: u32,
pub completed: bool,
pub created_at: String,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct TimerSnapshot {
pub phase: TimerPhase,
pub remaining_secs: u64,
pub total_secs: u64,
pub running: bool,
pub session_count: u32,
pub current_task_id: Option<String>,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct AppData {
pub settings: Settings,
pub tasks: Vec<Task>,
pub current_task_id: Option<String>,
#[serde(default)]
pub timer_snapshot: Option<TimerSnapshot>,
}
impl Default for AppData {
fn default() -> Self {
Self {
settings: Settings::default(),
tasks: Vec::new(),
current_task_id: None,
timer_snapshot: None,
}
}
}
pub fn data_path(app_data_dir: &PathBuf) -> PathBuf {
app_data_dir.join("data.json")
}
pub fn load(app_data_dir: &PathBuf) -> AppData {
let path = data_path(app_data_dir);
if !path.exists() {
return AppData::default();
}
let mut data = match fs::read_to_string(&path) {
Ok(contents) => serde_json::from_str(&contents).unwrap_or_default(),
Err(_) => AppData::default(),
};
// Guard against a corrupt/zero value that would cause division by zero
if data.settings.sessions_before_long_break == 0 {
data.settings.sessions_before_long_break = Settings::default().sessions_before_long_break;
}
data
}
pub fn save(app_data_dir: &PathBuf, data: &AppData) -> Result<(), String> {
fs::create_dir_all(app_data_dir)
.map_err(|e| format!("Failed to create data directory: {}", e))?;
let path = data_path(app_data_dir);
let contents = serde_json::to_string_pretty(data)
.map_err(|e| format!("Failed to serialize data: {}", e))?;
let tmp_path = app_data_dir.join("data.json.tmp");
fs::write(&tmp_path, contents)
.map_err(|e| format!("Failed to write temp data file: {}", e))?;
if cfg!(windows) {
if path.exists() {
fs::remove_file(&path)
.map_err(|e| format!("Failed to remove existing data file: {}", e))?;
}
}
fs::rename(&tmp_path, &path)
.map_err(|e| format!("Failed to finalize data file: {}", e))?;
Ok(())
}
#[cfg(test)]
mod tests {
use super::{load, save, AppData, Settings, Task, TimerSnapshot};
use crate::state::TimerPhase;
use std::fs;
use std::time::{SystemTime, UNIX_EPOCH};
fn temp_dir(label: &str) -> std::path::PathBuf {
let unique = SystemTime::now()
.duration_since(UNIX_EPOCH)
.unwrap()
.as_nanos();
std::env::temp_dir().join(format!("solstice-storage-{label}-{unique}"))
}
#[test]
fn load_preserves_persisted_timer_snapshot() {
let dir = temp_dir("load-timer-snapshot");
fs::create_dir_all(&dir).unwrap();
let json = serde_json::json!({
"settings": {
"work_duration_secs": 1500,
"short_break_secs": 300,
"long_break_secs": 900,
"sessions_before_long_break": 4
},
"tasks": [],
"current_task_id": "task-1",
"timer_snapshot": {
"phase": "short_break",
"remaining_secs": 120,
"total_secs": 300,
"running": false,
"session_count": 2,
"current_task_id": "task-1"
}
})
.to_string();
fs::write(dir.join("data.json"), json).unwrap();
let data = load(&dir);
let snapshot = data.timer_snapshot.expect("expected timer snapshot");
assert_eq!(snapshot.phase, TimerPhase::ShortBreak);
assert_eq!(snapshot.remaining_secs, 120);
assert_eq!(snapshot.total_secs, 300);
assert_eq!(snapshot.session_count, 2);
assert_eq!(snapshot.current_task_id.as_deref(), Some("task-1"));
}
#[test]
fn save_persists_timer_snapshot() {
let dir = temp_dir("save-timer-snapshot");
let data = AppData {
settings: Settings::default(),
tasks: vec![Task {
id: "task-1".to_string(),
name: "Deep work".to_string(),
total_sessions: 4,
remaining_sessions: 3,
completed: false,
created_at: "2026-06-09T00:00:00Z".to_string(),
}],
current_task_id: Some("task-1".to_string()),
timer_snapshot: Some(TimerSnapshot {
phase: TimerPhase::Work,
remaining_secs: 600,
total_secs: 1500,
running: true,
session_count: 1,
current_task_id: Some("task-1".to_string()),
}),
};
save(&dir, &data).unwrap();
let reloaded = load(&dir);
let snapshot = reloaded.timer_snapshot.expect("expected timer snapshot");
assert!(snapshot.running);
assert_eq!(snapshot.remaining_secs, 600);
assert_eq!(snapshot.total_secs, 1500);
}
}
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