use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[derive(Default)]
pub enum InternetMode {
    #[default]
    Off,
    ReadOnly,
    Full,
}

impl InternetMode {
    pub fn can_fetch(&self) -> bool {
        matches!(self, InternetMode::Full)
    }

    pub fn can_download(&self) -> bool {
        matches!(self, InternetMode::Full)
    }

    pub fn can_search(&self) -> bool {
        matches!(self, InternetMode::Full)
    }
}


#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Settings {
    pub internet_mode: InternetMode,
    pub provider: String,
    pub model: String,
    pub api_key: Option<String>,
    pub max_tokens: u32,
    pub temperature: f32,
    pub review_enabled: bool,
    pub review_max_lessons_per_run: usize,
    pub adaptive_review_max_skip: u32,
    pub workflow_max_concurrency: usize,
    pub session_archive_enabled: bool,
}

impl Default for Settings {
    fn default() -> Self {
        Settings {
            internet_mode: InternetMode::Off,
            provider: "openrouter".to_string(),
            model: "anthropic/claude-opus-4-8".to_string(),
            api_key: None,
            max_tokens: 8192,
            temperature: 0.7,
            review_enabled: true,
            review_max_lessons_per_run: 5,
            adaptive_review_max_skip: 3,
            workflow_max_concurrency: 5,
            session_archive_enabled: true,
        }
    }
}

impl Settings {
    pub fn load() -> Self {
        let store = super::store::Store::new();
        let path = store.base_dir.join("settings.json");
        std::fs::read_to_string(path)
            .ok()
            .and_then(|s| serde_json::from_str(&s).ok())
            .unwrap_or_default()
    }

    pub fn save(&self) -> std::io::Result<()> {
        let store = super::store::Store::new();
        std::fs::create_dir_all(&store.base_dir)?;
        let path = store.base_dir.join("settings.json");
        let s = serde_json::to_string_pretty(self)?;
        std::fs::write(path, s)?;
        Ok(())
    }
}