use std::collections::HashMap;
use serde::{Serialize, Deserialize};
//use serde_json::value::{to_value, Value};
//use log::error;
use std::io::{Error, ErrorKind, Result};

use pasetoken_lib::ConfigPaSeToken;
use pasetors::footer::Footer;

use crate::{
    CFG_FILE_EXTENSION,
    FILE_SCHEME,
    defs::{
        Local, TotpAlgorithm, TotpMode,
        deserialize_totp_algorithm,
        deserialize_totp_mode,
    },
}; 

use std::path::Path;

// use crate::tools::generate_uuid;

// fn default_config_empty() -> String {
//   "".to_string()
// }
// fn default_config_items() -> HashMap<String,String> {
//   HashMap::new()
// }
fn default_config_resource() -> String {
  "/".to_string()
}
fn default_config_array_resource() -> Vec<String> {
  Vec::new()
}
fn default_config_serv_paths()-> Vec<ServPath> {
  Vec::new()
}
fn default_config_dflt_lang() -> String {
  "en".to_string()
}
// fn default_server_uid() -> String {
//     generate_uuid(String::from("abcdef0123456789"))
// }
fn default_config_org() -> String {
  "".to_string()
}
fn default_config_empty() -> String {
  "".to_string()
}
fn default_config_locales() -> HashMap<String,Local> {
  HashMap::new()
}
fn default_config_tpls() -> HashMap<String,String> {
  HashMap::new()
}
fn default_is_restricted() -> bool {
  false
}
fn default_config_use_mail() -> bool {
  false
}
fn default_config_use_random() -> bool {
   false
}
fn default_config_invite_expire() -> u64 {
  300
}
fn default_config_web_menu_items() -> Vec<WebMenuItem> {
    Vec::new()
}
fn default_web_menu_item_roles() -> Vec<String> {
    Vec::new()
}
fn default_sub_menu_items() -> Vec<SubMenuItem> {
    Vec::new()
}
fn default_config_totp_digits() -> usize {
    6
}
fn default_config_totp_algorithm() -> TotpAlgorithm {
    TotpAlgorithm::default()
}
fn default_config_totp_mode() -> TotpMode {
    TotpMode::default()
}
fn default_config_password_score() -> u8 {
    0
}
#[derive(Debug, Clone, Serialize, Deserialize,Default)]
pub struct SubMenuItem {
        #[serde(default = "default_config_empty")]
    pub typ: String,
        #[serde(default = "default_config_empty")]
    pub srctyp: String,
        #[serde(default = "default_config_empty")]
    pub text: String,
        #[serde(default = "default_config_empty")]
    pub url: String,
        #[serde(default = "default_web_menu_item_roles")]
    pub roles: Vec<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize,Default)]
pub struct WebMenuItem {
        #[serde(default = "default_config_empty")]
    pub typ: String,
        #[serde(default = "default_config_empty")]
    pub srctyp: String,
        #[serde(default = "default_config_empty")]
    pub text: String,
        #[serde(default = "default_config_empty")]
    pub url: String,
        #[serde(default = "default_web_menu_item_roles")]
    pub roles: Vec<String>,
        #[serde(default = "default_sub_menu_items")]
    pub items: Vec<SubMenuItem>,
}

#[derive(Debug, Clone, Serialize, Deserialize,Default)]
pub struct UiConfig {
        #[serde(default = "default_config_empty")]
    pub css_link: String,
        #[serde(default = "default_config_empty")]
    pub js_link: String,
        #[serde(default = "default_config_empty")]
    pub other_css_link: String,
        #[serde(default = "default_config_empty")]
    pub other_js_link: String,
        #[serde(default = "default_config_empty")]
    pub main_js_link: String,
        #[serde(default = "default_config_empty")]
    pub utils_js_link: String,
        #[serde(default = "default_config_web_menu_items")]
    pub web_menu_items: Vec<WebMenuItem>,
} 

/// ServPath collects dir path to server as static content
#[derive(Debug, Clone, Serialize, Deserialize,Default)]
pub struct ServPath {
        #[serde(default = "default_config_empty")]
    pub src_path: String,
        #[serde(default = "default_config_empty")]
    pub url_path: String,
        #[serde(default = "default_config_empty")]
    pub not_found: String,
        #[serde(default = "default_config_empty")]
    pub not_auth: String,
        #[serde(default = "default_is_restricted")]
    pub is_restricted: bool,
        #[serde(default = "default_config_empty")]
    pub redirect_to: String,
}
/// Config collects config values.
#[derive(Debug, Clone, Serialize, Deserialize,Default)]
pub struct Config {
    pub hostport: String,
    pub bind: String,
    pub port: u16,
    pub protocol: String,
        #[serde(default = "default_config_org")]
    pub org: String,
    pub name: String,
    pub verbose: u8,
    pub prefix: String,
    pub resources_path: String,
    pub cert_file: String,
    pub key_file: String,
    //pub certs_store_path: String,
    //pub cert_file_sufix: String,
        #[serde(default = "default_config_array_resource")]
    pub allow_origin: Vec<String>,
        #[serde(default = "default_config_array_resource")]
    pub langs: Vec<String>,
        #[serde(default = "default_config_dflt_lang")]
    pub dflt_lang: String,
        #[serde(default = "default_config_empty")]
    pub path_locales_config: String,
        #[serde(default = "default_config_locales")]
    pub locales: HashMap<String,Local>,

    // Some paths 
        #[serde(default = "default_config_resource")]
    pub root_path: String,
        #[serde(default = "default_config_resource")]
    pub defaults_path: String,
        #[serde(default = "default_config_serv_paths")]
    pub serv_paths: Vec<ServPath>,
        #[serde(default = "default_config_resource")]
    pub docs_index: String,

        #[serde(default = "default_config_resource")]
    pub templates_path: String,
        #[serde(default = "default_config_resource")]
    pub html_url: String,
        #[serde(default = "default_config_resource")]
    pub assets_url: String,

        #[serde(default = "default_config_resource")]
    pub users_store_uri: String,
        #[serde(default = "default_config_empty")]
    pub user_store_access: String,

        #[serde(default = "default_config_empty")]
    pub signup_mode: String,
        #[serde(default = "default_config_invite_expire")]
    pub invite_expire: u64,
        #[serde(default = "default_config_use_random")]
    pub use_random: bool,
        #[serde(default = "default_config_totp_digits")]
    pub totp_digits: usize,
        #[serde(default = "default_config_totp_mode", deserialize_with = "deserialize_totp_mode")]
    pub totp_mode: TotpMode,
        #[serde(default = "default_config_totp_algorithm", deserialize_with = "deserialize_totp_algorithm")]
    pub totp_algorithm: TotpAlgorithm,

        #[serde(default = "default_config_password_score")]
    pub password_score: u8,
        #[serde(default = "default_config_empty")]
    pub admin_fields: String,
        #[serde(default = "default_config_empty")]
    pub mail_from: String,
        #[serde(default = "default_config_empty")]
    pub mail_reply_to: String,

        #[serde(default = "default_config_use_mail")]
    pub use_mail: bool,
        #[serde(default = "default_config_empty")]
    pub smtp: String,
        #[serde(default = "default_config_empty")]
    pub smtp_auth: String,

    #[cfg(feature = "authstore")]
        #[serde(default = "default_config_resource")]
    pub authz_store_uri: String,
    #[cfg(feature = "casbin")]
        #[serde(default = "default_config_empty")]
    pub authz_model_path: String,
    #[cfg(feature = "casbin")]
        #[serde(default = "default_config_empty")]
    pub authz_policy_path: String,
        #[serde(default = "default_config_empty")]

    pub session_store_uri: String,
        #[serde(default = "default_config_empty")]
    pub session_store_file: String,
    pub session_expire: u64,

    pub paseto: ConfigPaSeToken,

    pub ui: UiConfig,

        #[serde(default = "default_config_tpls")]
    pub tpls: HashMap<String,String>,
}

impl Config {
    fn fix_root_path<Config>(&mut self, root_path:  String ) { 
        if root_path != self.root_path {
            self.root_path = root_path.to_owned();
        }
        if self.root_path.is_empty() || ! Path::new(&self.root_path).exists() {
            return;
        }
        if self.users_store_uri.starts_with(FILE_SCHEME) {
            self.users_store_uri = format!("{}{}",
                FILE_SCHEME, self.fix_item_path(self.users_store_uri.replace(FILE_SCHEME,"")));
        } 
        if self.session_store_uri.starts_with(FILE_SCHEME) {
            self.session_store_uri = format!("{}{}",
                FILE_SCHEME, self.fix_item_path(self.session_store_uri.replace(FILE_SCHEME,"")));
        }
        self.cert_file = self.fix_item_path(self.cert_file.to_owned());
        self.key_file = self.fix_item_path(self.key_file.to_owned());
        self.templates_path = self.fix_item_path(self.templates_path.to_owned());
        self.defaults_path = self.fix_item_path(self.defaults_path.to_owned());
        self.paseto.public_path = self.fix_item_path(self.paseto.public_path.to_owned());
        self.paseto.secret_path = self.fix_item_path(self.paseto.secret_path.to_owned());
        #[cfg(feature = "authstore")]
        if self.authz_store_uri.starts_with(FILE_SCHEME) {
            self.authz_store_uri = format!("{}{}", 
                FILE_SCHEME, self.fix_item_path(self.authz_store_uri.replace(FILE_SCHEME,"")));
        }
        #[cfg(feature = "casbin")]
        {
            self.authz_model_path = self.fix_item_path(self.authz_model_path.to_owned());
            self.authz_policy_path = self.fix_item_path(self.authz_policy_path.to_owned());
        }
        // Loading paseto 
        (self.paseto.public_data, self.paseto.secret_data) = self.paseto.load_data();
        self.paseto.footer = ConfigPaSeToken::make_footer(
            self.paseto.map_footer.to_owned()
        ).unwrap_or(Footer::new());
    }
    fn fix_item_path(&mut self, item: String ) -> String { 
        if !item.is_empty() && ! Path::new(&item).exists() {
            format!("{}/{}",&self.root_path,&item)
        } else {
            item
        }
    }
    pub fn load_items(&mut self ) { 
        self.fix_root_path::<Config>(self.root_path.to_owned());
    } 
    #[allow(dead_code)] 
    pub fn to_json(&self) -> String {
        serde_json::to_string(self).unwrap_or_else(|e|{
            println!("Error to convert Config to json: {}",e);
            String::from("")
        })
    }
    // #[allow(dead_code)] 
    // pub fn st_html_path(&self) -> &'static str  {
    //     Box::leak(self.html_path.to_owned().into_boxed_str())
    // }
    #[allow(dead_code)] 
    pub fn full_html_url(&self, url: &str) -> String {
        format!("{}://{}:{}/{}",
            &self.protocol,&self.bind,&self.port,
            url
        )
    }
    pub fn load_from_file<'a>(file_cfg: &str, name: &str) -> Result<Self> { 
        let item_cfg: Self;
        let file_path: String;
        if file_cfg.contains(CFG_FILE_EXTENSION) {
            file_path = file_cfg.to_string();
        } else { 
            file_path = format!("{}{}",file_cfg.to_string(),CFG_FILE_EXTENSION);
        }
        let config_content:  &'a str;
        match std::fs::read_to_string(&file_path) {
            Ok(cfgcontent) => config_content = Box::leak(cfgcontent.into_boxed_str()),
            Err(e) => 
                return Err(Error::new(
                    ErrorKind::InvalidInput,
                    format!("Error read {}: {}",&file_path,e)
                )),
        };
        // match toml::from_str::<T>(&config_content) {
        match toml::from_str::<Self>(&config_content) {
            Ok(cfg) => item_cfg = cfg, 
            Err(e) => return Err(Error::new(
                ErrorKind::InvalidInput,
                format!("Error loading config {}: {}",&file_path,e)
            )),
        };
        log::info!("Loaded {} config from: {}", &name, &file_path);
        Ok(item_cfg)
    } 

}