use std::path::PathBuf;

use serde::{Deserialize, Serialize};

use crate::{Error, Result};

const STYLE: &str = include_str!("../examples/simple-gruvbox.css");
const BOOKMARKS: &str = include_str!("../examples/bookmarks.json");
const FAVICON: &str = include_str!("../examples/favicon.svg");

#[derive(Deserialize, Serialize, Clone)]
pub struct Config {
    pub port: u16,
    pub style_file: PathBuf,
    pub bookmarks_file: PathBuf,
    pub favicon_file: PathBuf,
}

impl Config {
    pub fn new() -> Result<Config> {
        let config_home = if let Ok(xdg_config_home) = std::env::var("XDG_CONFIG_HOME") {
            PathBuf::from(xdg_config_home).join("sbm-rs")
        } else if let Ok(home) = std::env::var("HOME") {
            PathBuf::from(home).join(".config/sbm-rs")
        } else {
            return Err(Error::ConfigNotFound);
        };

        if config_home.exists() {
            Config::load_config(&config_home)
        } else {
            Config::generate_defaults(&config_home)
        }
    }
    pub fn load_config(config_home: &PathBuf) -> Result<Config> {
        let config = config_home.join("config.toml");

        let config = std::fs::read_to_string(config)?;

        let config: Config = toml::from_str(&config)?;

        Ok(config)
    }
    pub fn generate_defaults(config_home: &PathBuf) -> Result<Config> {
        std::fs::create_dir_all(&config_home)?;

        let style_file = config_home.join("style.css");
        let bookmarks_file = config_home.join("bookmarks.json");
        let favicon_file = config_home.join("favicon.svg");
        let config_file = config_home.join("config.toml");

        std::fs::write(&style_file, &STYLE)?;
        std::fs::write(&bookmarks_file, &BOOKMARKS)?;
        std::fs::write(&favicon_file, &FAVICON)?;

        let config = Config {
            port: 8080,
            style_file,
            bookmarks_file,
            favicon_file,
        };

        let config_file_content = toml::to_string(&config)?;
        std::fs::write(config_file, config_file_content)?;

        Ok(config)
    }
}