use std::future::Future;
use std::net::IpAddr;
use std::pin::Pin;

use actix::Addr;
use actix_identity::Identity;
use actix_remote_ip::RemoteIP;
use actix_web::dev::Payload;
use actix_web::{Error, FromRequest, HttpRequest, web};

use crate::actors::providers_states_actor::ProviderLoginState;
use crate::actors::users_actor;
use crate::actors::users_actor::{AuthorizedAuthenticationSources, UsersActor};
use crate::data::app_config::{ActionLoggerFormat, AppConfig};
use crate::data::client::ClientID;
use crate::data::provider::{Provider, ProviderID};

use crate::data::session_identity::SessionIdentity;
use crate::data::user::{FactorID, GrantedClients, TwoFactor, TwoFactorType, User, UserID};
use crate::utils::time::time;

#[derive(serde::Serialize)]
pub struct LoggableUser {
    pub uid: UserID,
    pub username: String,
    pub email: String,
    pub admin: bool,
}

impl LoggableUser {
    pub fn quick_identity(&self) -> String {
        format!(
            "{} {} {} ({:?})",
            match self.admin {
                true => "admin",
                false => "user",
            },
            self.username,
            self.email,
            self.uid
        )
    }
}

impl User {
    pub fn loggable(&self) -> LoggableUser {
        LoggableUser {
            uid: self.uid.clone(),
            username: self.username.clone(),
            email: self.email.clone(),
            admin: self.admin,
        }
    }
}

#[derive(Debug, serde::Serialize)]
pub enum LoggableFactorType {
    TOTP,
    WEBAUTHN,
}

#[derive(serde::Serialize)]
pub struct LoggableFactor {
    pub id: FactorID,
    pub name: String,
    pub kind: LoggableFactorType,
}

impl LoggableFactor {
    pub fn quick_description(&self) -> String {
        format!(
            "#{} of type {:?} and name '{}'",
            self.id.0, self.kind, self.name
        )
    }
}

impl TwoFactor {
    pub fn loggable(&self) -> LoggableFactor {
        LoggableFactor {
            id: self.id.clone(),
            name: self.name.to_string(),
            kind: match self.kind {
                TwoFactorType::TOTP(_) => LoggableFactorType::TOTP,
                TwoFactorType::WEBAUTHN(_) => LoggableFactorType::WEBAUTHN,
            },
        }
    }
}

#[derive(serde::Serialize)]
#[serde(tag = "type")]
pub enum Action<'a> {
    AdminCreateUser {
        user: LoggableUser,
    },
    AdminUpdateUser {
        user: LoggableUser,
    },
    AdminDeleteUser {
        user: LoggableUser,
    },
    AdminResetUserPassword {
        user: LoggableUser,
    },
    AdminRemoveUserFactor {
        user: LoggableUser,
        factor: LoggableFactor,
    },
    AdminSetAuthorizedAuthenticationSources {
        user: LoggableUser,
        sources: &'a AuthorizedAuthenticationSources,
    },
    AdminSetNewGrantedClientsList {
        user: LoggableUser,
        clients: &'a GrantedClients,
    },
    AdminClear2FAHistory {
        user: LoggableUser,
    },
    LoginWebauthnAttempt {
        success: bool,
        user_id: UserID,
    },
    StartLoginAttemptWithOpenIDProvider {
        provider_id: &'a ProviderID,
        state: &'a str,
    },
    ProviderError {
        message: &'a str,
    },
    ProviderCBInvalidState {
        state: &'a str,
    },
    ProviderRateLimited,
    ProviderFailedGetToken {
        state: &'a ProviderLoginState,
        code: &'a str,
    },
    ProviderFailedGetUserInfo {
        provider: &'a Provider,
    },
    ProviderEmailNotValidated {
        provider: &'a Provider,
    },
    ProviderMissingEmailInResponse {
        provider: &'a Provider,
    },
    ProviderAccountNotFound {
        provider: &'a Provider,
        email: &'a str,
    },
    ProviderAccountAutoCreated {
        provider: &'a Provider,
        user: LoggableUser,
    },
    ProviderAccountDisabled {
        provider: &'a Provider,
        email: &'a str,
    },

    ProviderAccountNotAllowedToLoginWithProvider {
        provider: &'a Provider,
        email: &'a str,
    },
    ProviderLoginFailed {
        provider: &'a Provider,
        email: &'a str,
    },
    ProviderLoginSuccessful {
        provider: &'a Provider,
        user: LoggableUser,
    },
    SignOut,
    UserNeed2FAOnLogin {
        user: LoggableUser,
    },
    UserSuccessfullyAuthenticated {
        user: LoggableUser,
    },
    UserNeedNewPasswordOnLogin {
        user: LoggableUser,
    },
    TryLoginWithDisabledAccount {
        login: &'a str,
    },
    TryLocalLoginFromUnauthorizedAccount {
        login: &'a str,
    },
    FailedLoginWithBadCredentials {
        login: &'a str,
    },
    UserChangedPasswordOnLogin {
        user_id: &'a UserID,
    },
    OTPLoginAttempt {
        user: LoggableUser,
        success: bool,
    },
    NewOpenIDSession {
        client: &'a ClientID,
    },
    NewOpenIDSuccessfulImplicitAuth {
        client: &'a ClientID,
    },
    ChangedHisPassword,
    ClearedHisLoginHistory,
    AddNewFactor {
        factor: LoggableFactor,
    },
    Removed2FAFactor {
        factor_id: &'a FactorID,
    },
}

impl Action<'_> {
    pub fn as_string(&self) -> String {
        match self {
            Action::AdminDeleteUser { user } => {
                format!("deleted account of {}", user.quick_identity())
            }
            Action::AdminCreateUser { user } => {
                format!("created account of {}", user.quick_identity())
            }
            Action::AdminUpdateUser { user } => {
                format!("updated account of {}", user.quick_identity())
            }
            Action::AdminResetUserPassword { user } => {
                format!(
                    "set a temporary password for the account of {}",
                    user.quick_identity()
                )
            }
            Action::AdminRemoveUserFactor { user, factor } => format!(
                "removed 2 factor ({}) of user ({})",
                factor.quick_description(),
                user.quick_identity()
            ),
            Action::AdminClear2FAHistory { user } => {
                format!("cleared 2FA history of {}", user.quick_identity())
            }
            Action::AdminSetAuthorizedAuthenticationSources { user, sources } => format!(
                "update authorized authentication sources ({:?}) for user ({})",
                sources,
                user.quick_identity()
            ),
            Action::AdminSetNewGrantedClientsList { user, clients } => format!(
                "set new granted clients list ({:?}) for user ({})",
                clients,
                user.quick_identity()
            ),
            Action::LoginWebauthnAttempt { success, user_id } => match success {
                true => format!("successfully performed webauthn attempt for user {user_id:?}"),
                false => format!("performed FAILED webauthn attempt for user {user_id:?}"),
            },
            Action::StartLoginAttemptWithOpenIDProvider { provider_id, state } => format!(
                "started new authentication attempt through an OpenID provider (prov={} / state={state})",
                provider_id.0
            ),
            Action::ProviderError { message } => {
                format!("failed provider authentication with message '{message}'")
            }
            Action::ProviderCBInvalidState { state } => {
                format!("provided invalid callback state after provider authentication: '{state}'")
            }
            Action::ProviderRateLimited => {
                "could not complete OpenID login because it has reached failed attempts rate limit!"
                    .to_string()
            }
            Action::ProviderFailedGetToken { state, code } => format!(
                "could not complete login from provider because the id_token could not be retrieved! (state={state:?} code = {code})"
            ),
            Action::ProviderFailedGetUserInfo { provider } => format!(
                "could not get user information from userinfo endpoint of provider {}!",
                provider.id.0
            ),
            Action::ProviderEmailNotValidated { provider } => format!(
                "could not login using provider {} because its email was marked as not validated!",
                provider.id.0
            ),
            Action::ProviderMissingEmailInResponse { provider } => format!(
                "could not login using provider {} because the email was not provided by userinfo endpoint!",
                provider.id.0
            ),
            Action::ProviderAccountNotFound { provider, email } => format!(
                "could not login using provider {} because the email {email} could not be associated to any account!",
                &provider.id.0
            ),
            Action::ProviderAccountAutoCreated { provider, user } => format!(
                "triggered automatic account creation for {} from provider {} because it was not found in local accounts list!",
                user.quick_identity(),
                &provider.id.0
            ),
            Action::ProviderAccountDisabled { provider, email } => format!(
                "could not login using provider {} because the account associated to the email {email} is disabled!",
                &provider.id.0
            ),
            Action::ProviderAccountNotAllowedToLoginWithProvider { provider, email } => format!(
                "could not login using provider {} because the account associated to the email {email} is not allowed to authenticate using this provider!",
                &provider.id.0
            ),
            Action::ProviderLoginFailed { provider, email } => format!(
                "could not login using provider {} with the email {email} for an unknown reason!",
                &provider.id.0
            ),
            Action::ProviderLoginSuccessful { provider, user } => format!(
                "successfully authenticated using provider {} as {}",
                provider.id.0,
                user.quick_identity()
            ),
            Action::SignOut => "signed out".to_string(),
            Action::UserNeed2FAOnLogin { user } => {
                format!(
                    "successfully authenticated as user {:?} but need to do 2FA authentication",
                    user.quick_identity()
                )
            }
            Action::UserSuccessfullyAuthenticated { user } => {
                format!("successfully authenticated as {}", user.quick_identity())
            }
            Action::UserNeedNewPasswordOnLogin { user } => format!(
                "successfully authenticated as {}, but need to set a new password",
                user.quick_identity()
            ),
            Action::TryLoginWithDisabledAccount { login } => {
                format!("successfully authenticated as {login}, but this is a DISABLED ACCOUNT")
            }
            Action::TryLocalLoginFromUnauthorizedAccount { login } => {
                format!(
                    "successfully locally authenticated as {login}, but this is a FORBIDDEN for this account!"
                )
            }
            Action::FailedLoginWithBadCredentials { login } => {
                format!("attempted to authenticate as {login} but with a WRONG PASSWORD")
            }
            Action::UserChangedPasswordOnLogin { user_id } => {
                format!("set a new password at login as user {user_id:?}")
            }
            Action::OTPLoginAttempt { user, success } => match success {
                true => format!(
                    "successfully performed OTP attempt for user {}",
                    user.quick_identity()
                ),
                false => format!(
                    "performed FAILED OTP attempt for user {}",
                    user.quick_identity()
                ),
            },
            Action::NewOpenIDSession { client } => {
                format!("opened a new OpenID session with {:?}", client)
            }
            Action::NewOpenIDSuccessfulImplicitAuth { client } => format!(
                "finished an implicit flow connection for client {:?}",
                client
            ),
            Action::ChangedHisPassword => "changed his password".to_string(),
            Action::ClearedHisLoginHistory => "cleared his login history".to_string(),
            Action::AddNewFactor { factor } => format!(
                "added a new factor to his account : {}",
                factor.quick_description(),
            ),
            Action::Removed2FAFactor { factor_id } => format!("Removed his factor {factor_id:?}"),
        }
    }
}

#[derive(serde::Serialize)]
struct JsonActionData<'a> {
    time: u64,
    ip: IpAddr,
    user: Option<LoggableUser>,
    #[serde(flatten)]
    action: Action<'a>,
}

pub struct ActionLogger {
    ip: IpAddr,
    user: Option<User>,
}

impl ActionLogger {
    pub fn log(&self, action: Action) {
        match AppConfig::get().action_logger_format {
            ActionLoggerFormat::Text => log::info!(
                "{} from {} has {}",
                match &self.user {
                    None => "Anonymous user".to_string(),
                    Some(u) => u.loggable().quick_identity(),
                },
                self.ip,
                action.as_string()
            ),
            ActionLoggerFormat::Json => match serde_json::to_string(&JsonActionData {
                time: time(),
                ip: self.ip,
                user: self.user.as_ref().map(User::loggable),
                action,
            }) {
                Ok(j) => println!("{j}"),
                Err(e) => log::error!("Failed to serialize event to JSON! {e}"),
            },
            ActionLoggerFormat::None => {}
        }
    }
}

impl FromRequest for ActionLogger {
    type Error = Error;
    type Future = Pin<Box<dyn Future<Output = Result<Self, Self::Error>>>>;

    #[inline]
    fn from_request(req: &HttpRequest, _: &mut Payload) -> Self::Future {
        let req = req.clone();

        Box::pin(async move {
            let user_actor: &web::Data<Addr<UsersActor>> =
                req.app_data().expect("UserActor undefined!");

            let user_actor: Addr<UsersActor> = user_actor.as_ref().clone();

            let user_id = Identity::from_request(&req, &mut Payload::None)
                .into_inner()
                .ok()
                .and_then(|id| {
                    let sess = SessionIdentity(Some(&id));
                    match sess.is_authenticated() {
                        true => Some(sess.user_id()),
                        false => None,
                    }
                });

            Ok(Self {
                ip: RemoteIP::from_request(&req, &mut Payload::None)
                    .await
                    .unwrap()
                    .0,
                user: match user_id {
                    None => None,
                    Some(u) => {
                        user_actor
                            .send(users_actor::GetUserRequest(u))
                            .await
                            .unwrap()
                            .0
                    }
                },
            })
        })
    }
}