use std::{fmt::Write, process::Stdio};
use anyhow::bail;
use dim_sdk::{plugin_info, Context, DimPlugin, Message, Result};

mod config;

plugin_info!(
    Plug,                    // Your main global structs name that implements `DimPlugin`
    "volume",                // Plugin name
    "1.0.0",                 // Plugin Version (leave empty for none)
    "GPLv3"                  // Plugin license (leave empty for none)
);

#[derive(Debug, Clone)]
struct Plug {
    cfg: config::Config,
    ctx: Context
}

impl DimPlugin for Plug {
    fn init(ctx: Context) -> Result<Self> {
        let cfg;
        match config::Config::parse(&ctx.config_dir.join("config.toml").clone()) {
            Ok(c) => cfg = c,
            Err(e) => {
                log::error!("Failed to open config file: {e}");
                // TODO: Add function to disable the plugin
                bail!("")
            }
        }

        Ok(Self { ctx, cfg })
    }
    fn on_message(&mut self, msg: Message) -> Result<()> {
        self.ctx.buf.reset();
        match msg.name.as_str() {
            "poll" => {
                let mut proc = {
                        let mut p = std::process::Command::new("sh");
                        p.arg("-c");
                        p.arg(&self.cfg.commands.get_volume);
                        p.stdout(Stdio::piped());
                        p
                    };

                let output = String::from_utf8(proc.output()?.stdout)?;
                let re = regex::Regex::new(&self.cfg.commands.get_volume_regex)?;
            
                if let Some(caps) = re.captures(&output) {
                    let volume = &caps["vol"];
                    write!(self.ctx, "Vol: {volume}%")?;
                }
            }
            _ => ()
        }
        Ok(())
    }
    fn pre_reload(&mut self) -> Result<()> {
        Ok(())
    }
    fn post_reload(&mut self) -> Result<()> {
        Ok(())
    }
    fn free(&mut self) -> Result<()> {
        Ok(())
    }
}