use serde::{Deserialize, Serialize};
use tracing::instrument;

use crate::api::auth::RegistrationRequet;
use crate::database;
use crate::types::http::{ResponseCode, Result};

#[derive(Serialize, Deserialize, Debug)]
pub struct User {
    pub user_id: u64,
    pub firstname: String,
    pub lastname: String,
    pub email: String,
    pub password: String,
    pub gender: String,
    pub date: u64,
    pub day: u8,
    pub month: u8,
    pub year: u32,
}

impl User {
    #[instrument()]
    pub fn from_user_id(user_id: u64, hide_password: bool) -> Result<Self> {
        let Ok(Some(user)) = database::users::get_user_by_id(user_id, hide_password) else {
            return Err(ResponseCode::BadRequest.text("User does not exist"))
        };

        Ok(user)
    }

    #[instrument()]
    pub fn from_user_ids(user_ids: Vec<u64>) -> Vec<Self> {
        user_ids
            .iter()
            .filter_map(|user_id| {
                let Ok(Some(user)) = database::users::get_user_by_id(*user_id, true) else {
                return None;
            };
                Some(user)
            })
            .collect()
    }

    #[instrument()]
    pub fn from_user_page(page: u64) -> Result<Vec<Self>> {
        let Ok(users) = database::users::get_user_page(page, true) else {
            return Err(ResponseCode::BadRequest.text("Failed to fetch users"))
        };
        Ok(users)
    }

    #[instrument()]
    pub fn from_email(email: &str) -> Result<Self> {
        let Ok(Some(user)) = database::users::get_user_by_email(email, false) else {
            return Err(ResponseCode::BadRequest.text("User does not exist"))
        };

        Ok(user)
    }

    #[instrument()]
    pub fn from_password(password: &str) -> Result<Self> {
        let Ok(Some(user)) = database::users::get_user_by_password(password, true) else {
            return Err(ResponseCode::BadRequest.text("User does not exist"))
        };

        Ok(user)
    }

    #[instrument()]
    pub fn new(request: RegistrationRequet) -> Result<Self> {
        if Self::from_email(&request.email).is_ok() {
            return Err(ResponseCode::BadRequest
                .text(&format!("Email is already in use by {}", &request.email)));
        }

        if let Ok(user) = Self::from_password(&request.password) {
            return Err(ResponseCode::BadRequest
                .text(&format!("Password is already in use by {}", user.email)));
        }

        let Ok(user) = database::users::add_user(request) else {
            tracing::error!("Failed to create new user");
            return Err(ResponseCode::InternalServerError.text("Failed to create new uesr"))
        };

        Ok(user)
    }
}