use crate::{filters::IpFilter, hooks::Hook};
use anyhow::{bail, Result};
use log::info;
use serde::{Deserialize, Serialize};
use std::{collections::BTreeMap, fs::File};

#[derive(Debug, Deserialize, Serialize)]
#[serde(deny_unknown_fields)]
pub struct MetricsConfig {
    pub enabled: bool,
    pub ip_filter: Option<IpFilter>,
}

#[derive(Debug, Deserialize, Serialize)]
#[serde(deny_unknown_fields)]
pub struct Config {
    pub metrics: Option<MetricsConfig>,
    pub hooks: BTreeMap<String, Hook>,
}

pub fn get_config() -> Result<File> {
    // Look for config in CWD..
    if let Ok(config) = File::open("config.yml") {
        info!("Loading configuration from `./config.yml`");

        return Ok(config);
    }

    // ..look for user path config..
    if let Some(mut path) = dirs::config_dir() {
        path.push("webhookey/config.yml");

        if let Ok(config) = File::open(&path) {
            info!(
                "Loading configuration from `{}`",
                path.to_str().unwrap_or("<path unprintable>"),
            );

            return Ok(config);
        }
    }

    // ..look for systemwide config..
    if let Ok(config) = File::open("/etc/webhookey/config.yml") {
        info!("Loading configuration from `/etc/webhookey/config.yml`");

        return Ok(config);
    }

    // ..you had your chance.
    bail!("No configuration file found.");
}