use serde::{Deserialize, Serialize};
use std::fs;
use std::path::PathBuf;

use crate::types::HighlightRule;

#[derive(Serialize, Deserialize, Default)]
pub struct AppConfig {
    pub search_history: Vec<String>,
    pub case_sensitive: bool,
    pub use_regex: bool,
    pub last_search_query: String,
    #[serde(default)]
    pub highlight_rules: Vec<HighlightRule>,
}

impl AppConfig {
    fn config_path() -> PathBuf {
        let exe_path = std::env::current_exe().unwrap_or_else(|_| PathBuf::from("."));
        let exe_dir = exe_path.parent().unwrap_or_else(|| std::path::Path::new("."));
        exe_dir.join("rlogg_config.json")
    }

    pub fn load() -> Self {
        let path = Self::config_path();
        if let Ok(contents) = fs::read_to_string(&path) {
            serde_json::from_str(&contents).unwrap_or_default()
        } else {
            Self::default()
        }
    }

    pub fn save(&self) {
        let path = Self::config_path();
        if let Ok(json) = serde_json::to_string_pretty(self) {
            let _ = fs::write(&path, json);
        }
    }
}