use std::{collections::HashMap, path::PathBuf, str::FromStr};

use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize, Debug, PartialEq)]
struct SiteInfo {
    aliases: Vec<String>,
    /// Aliases for this subdomain - will have the same exact settings
    /// The socket address (e.g. `192.168.1.8:8080`) or port number (if on `localhost`) of the service to reverse proxy
    address: String,
    /// What auth file to use - 0 means none
    #[serde(skip_serializing_if = "Option::is_none")]
    auth: Option<u8>,
    #[serde(skip_serializing_if = "Option::is_none")]
    conf_file: Option<PathBuf>,
}

#[derive(Serialize, Deserialize, Debug, PartialEq)]
struct Config {
    /// What directory to output the conf files to
    #[serde(default = "default_output_dir")]
    output_dir: PathBuf,
    domain: String,
    /// Subdomains/services in the format `subdomain: SiteInfo`
    subdomains: HashMap<String, SiteInfo>,
    /// Paths to the htpasswd file for each auth number - starts at 1, goes to 255; see [`SiteInfo`]
    #[serde(skip_serializing_if = "Option::is_none")]
    htpasswd_files: Option<Vec<PathBuf>>,
    /// Default IP for if it's not specified in `socket_address_or_port` in [`SiteInfo`]. Defaults to localhost if not specified.
    #[serde(default = "default_default_ip")]
    default_ip: String,
}

/// Generates the default
pub(crate) fn example_config() -> String {
    let mut subdomains: HashMap<String, SiteInfo> = HashMap::new();
    subdomains.insert(
        "qbittorrent".to_string(),
        SiteInfo {
            aliases: vec!["qb".to_string()],
            address: "6011".to_string(),
            auth: None,
            conf_file: None,
        },
    );
    return serde_yml::to_string(
        &(Config {
            output_dir: default_output_dir(),
            domain: "example.net".to_string(),
            subdomains: subdomains,
            htpasswd_files: None,
            default_ip: default_default_ip(),
        }),
    )
    .unwrap();
}

// ----------------------------------------------------- DEFAULTS -----------------------------------------------------

fn default_output_dir() -> PathBuf {
    return PathBuf::from_str("conf.d").unwrap();
}

fn default_default_ip() -> String {
    return "localhost".to_string();
}