use serde::{Deserialize, Serialize};
use mongodb::{
    bson::{DateTime, oid::ObjectId},
    Client,
    Database,
    error::Error,
};

pub async fn get_database_client() -> Result<Database, Error> {
    Ok(Client::with_uri_str("mongodb:://localhost:27017").await?.database("dermy"))
}

#[derive(Serialize, Deserialize)]
pub struct Mole {
    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
    id: Option<ObjectId>,
    #[serde(rename="_user_id")]
    user_id: ObjectId,
    #[serde(rename="_image_path", skip_serializing_if = "Option::is_none")]
    image_path: Option<String>,
    location: Location,
}
impl Mole {
    pub fn new(user_id: ObjectId, location: Location) -> Self {
        let id = None;
        let image_path = None;
        
        Self {
            id,
            user_id,
            image_path,
            location,
        }
    }

    pub fn with_image(user_id: ObjectId, location: Location, image_path: String) -> Self {
        let id = None;
        let image_path = Some(image_path);

        Self {
            id,
            user_id,
            image_path,
            location
        }
    }
}

#[derive(Serialize, Deserialize)]
pub enum Location {
    FrontLocation(FrontLocation),
    LeftSideLocation(LeftSideLocation),
    RightSideLocation(RightSideLocation),
    BackLocation(BackLocation),
}

#[derive(Serialize, Deserialize)]
pub enum FrontLocation {} //TODO: Add front locations
#[derive(Serialize, Deserialize)]
pub enum LeftSideLocation {} //TODO: Add left side locations 
#[derive(Serialize, Deserialize)]
pub enum RightSideLocation {}  //TODO: Add right side locations
#[derive(Serialize, Deserialize)]
pub enum BackLocation {} //TODO: Add back locations

#[derive(Serialize, Deserialize)]
pub struct LogEntry {
    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
    pub id: Option<ObjectId>,
    #[serde(rename = "_date_created")]
    pub date_created: DateTime,
    pub contents: String,
    #[serde(rename = "_mole_id")]
    pub mole_id: ObjectId
}
impl LogEntry {
    pub fn new(contents: String, mole_id: ObjectId) -> Self {
        let id = None;
        let date_created: DateTime = chrono::Utc::now().into();

        Self {
            id,
            date_created,
            contents,
            mole_id,
        }
    }
}

#[derive(Serialize, Deserialize)]
pub struct User {
    #[serde(rename = "_id", skip_serializing_if = "Option::is_none")]
    pub id: Option<ObjectId>, 
    #[serde(rename="_auth")]
    pub auth: Auth,
    pub username: String,
}
impl User {
    pub fn new(username: String) -> Self {
        let id = None;
        let auth = Default::default();
        Self {
            id,
            auth,
            username,
        }
    }
}
#[derive(Default, Serialize, Deserialize)]
pub struct Auth {
    #[serde(rename = "_hash", skip_serializing_if = "Option::is_none")]
    pub hash: Option<String>,
    #[serde(rename = "_salt", skip_serializing_if = "Option::is_none")]
    pub salt: Option<String>,
}
impl Auth {
    pub fn from_hash(hash: String) -> Self {
        let salt = None;
        let hash = Some(hash);

        Self {
            hash,
            salt,
        }
    }
}