use oiseau::config::{Configuration, DatabaseConfig};
use pathbufd::PathBufD;
use serde::{Deserialize, Serialize};
use tetratto_shared::hash::random_id;

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct ServiceHostsConfig {
    pub tetratto: String,
    pub buckets: String,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct Config {
    /// The name of the site. Shown in the UI.
    #[serde(default = "default_name")]
    pub name: String,
    /// The (CSS) theme color of the site. Shown in the UI.
    #[serde(default = "default_theme_color")]
    pub theme_color: String,
    /// The slug of the instance's information page.
    ///
    /// Should be the pathname WITHOUT the leading slash.
    #[serde(default = "default_what_page_slug")]
    pub what_page_slug: String,
    /// The username of the handler account in charge of this instance on the
    /// linked Tetratto host.
    #[serde(default = "default_tetratto_handler_account_username")]
    pub tetratto_handler_account_username: String,
    /// Database configuration.
    #[serde(default = "default_database")]
    pub database: DatabaseConfig,
    /// Real IP header (for reverse proxy).
    #[serde(default = "default_real_ip_header")]
    pub real_ip_header: String,
    /// The host URL of required services.
    #[serde(default = "default_service_hosts")]
    pub service_hosts: ServiceHostsConfig,
    /// The master password which is allowed to do anything without password checks.
    pub master_pass: String,
}

fn default_name() -> String {
    "Fluffle".to_string()
}

fn default_theme_color() -> String {
    "#a3b3ff".to_string()
}

fn default_what_page_slug() -> String {
    "what".to_string()
}

fn default_tetratto_handler_account_username() -> String {
    "fluffle".to_string()
}

fn default_database() -> DatabaseConfig {
    DatabaseConfig::default()
}

fn default_real_ip_header() -> String {
    "CF-Connecting-IP".to_string()
}

fn default_service_hosts() -> ServiceHostsConfig {
    ServiceHostsConfig {
        tetratto: "https://tetratto.com".to_string(),
        buckets: "https://assetdelivery.tetratto.com".to_string(),
    }
}

impl Configuration for Config {
    fn db_config(&self) -> DatabaseConfig {
        self.database.to_owned()
    }
}

impl Default for Config {
    fn default() -> Self {
        Self {
            name: default_name(),
            theme_color: default_theme_color(),
            what_page_slug: default_what_page_slug(),
            tetratto_handler_account_username: default_tetratto_handler_account_username(),
            database: default_database(),
            real_ip_header: default_real_ip_header(),
            service_hosts: default_service_hosts(),
            master_pass: random_id(),
        }
    }
}

impl Config {
    /// Read the configuration file.
    pub fn read() -> Self {
        toml::from_str(
            &match std::fs::read_to_string(PathBufD::current().join("fluffle.toml")) {
                Ok(x) => x,
                Err(_) => {
                    let x = Config::default();

                    std::fs::write(
                        PathBufD::current().join("fluffle.toml"),
                        &toml::to_string_pretty(&x).expect("failed to serialize config"),
                    )
                    .expect("failed to write config");

                    return x;
                }
            },
        )
        .expect("failed to deserialize config")
    }
}