use actix::Addr;
use actix_web::{HttpResponse, Responder, web};
use askama::Template;

use crate::actors::{bruteforce_actor, users_actor};
use crate::actors::bruteforce_actor::BruteForceActor;
use crate::actors::users_actor::UsersActor;
use crate::constants::{APP_NAME, MAX_FAILED_LOGIN_ATTEMPTS, MIN_PASS_LEN};
use crate::data::current_user::CurrentUser;
use crate::data::remote_ip::RemoteIP;
use crate::data::user::User;

pub(crate) struct BaseSettingsPage {
    pub danger_message: Option<String>,
    pub success_message: Option<String>,
    pub page_title: &'static str,
    pub app_name: &'static str,
    pub is_admin: bool,
    pub user_name: String,
}

impl BaseSettingsPage {
    pub fn get(page_title: &'static str, user: &User,
               danger_message: Option<String>, success_message: Option<String>) -> BaseSettingsPage {
        Self {
            danger_message,
            success_message,
            page_title,
            app_name: APP_NAME,
            is_admin: user.admin,
            user_name: user.username.to_string(),
        }
    }
}

#[derive(Template)]
#[template(path = "settings/account_details.html")]
struct AccountDetailsPage {
    _p: BaseSettingsPage,
    u: User,
}

#[derive(Template)]
#[template(path = "settings/change_password.html")]
struct ChangePasswordPage {
    _p: BaseSettingsPage,
    min_pwd_len: usize,
}

/// Account details page
pub async fn account_settings_details_route(user: CurrentUser) -> impl Responder {
    let user = user.into();
    HttpResponse::Ok()
        .body(AccountDetailsPage {
            _p: BaseSettingsPage::get("Account details", &user, None, None),
            u: user,
        }.render().unwrap())
}

#[derive(serde::Deserialize)]
pub struct PassChangeRequest {
    pub old_pass: String,
    pub new_pass: String,
}

/// Change password route
pub async fn change_password_route(user: CurrentUser,
                                   users: web::Data<Addr<UsersActor>>,
                                   req: Option<web::Form<PassChangeRequest>>,
                                   bruteforce: web::Data<Addr<BruteForceActor>>,
                                   remote_ip: RemoteIP) -> impl Responder {
    let mut danger = None;
    let mut success = None;

    let user: User = user.into();

    let failed_attempts = bruteforce.send(bruteforce_actor::CountFailedAttempt { ip: remote_ip.into() }).await.unwrap();
    if failed_attempts > MAX_FAILED_LOGIN_ATTEMPTS {
        danger = Some("Too many invalid password attempts. Please try to change your password later.".to_string());
    } else if let Some(req) = req {

        // Invalid password
        if !user.verify_password(&req.old_pass) {
            danger = Some("Old password is invalid!".to_string());
            bruteforce.send(bruteforce_actor::RecordFailedAttempt { ip: remote_ip.into() }).await.unwrap();
        }

        // Password too short
        else if req.new_pass.len() < MIN_PASS_LEN {
            danger = Some("New password is too short!".to_string());
        }

        // Change password
        else {
            let res = users.send(
                users_actor::ChangePasswordRequest {
                    user_id: user.uid.clone(),
                    new_password: req.new_pass.to_string(),
                    temporary: false,
                }
            ).await.unwrap().0;

            if !res {
                danger = Some("An error occurred while trying to change your password!".to_string());
            } else {
                success = Some("Your password was successfully changed!".to_string());
            }
        }
    }

    HttpResponse::Ok()
        .body(ChangePasswordPage {
            _p: BaseSettingsPage::get("Change password", &user, danger, success),
            min_pwd_len: MIN_PASS_LEN,
        }.render().unwrap())
}