// TODO: put back in `src/model/user/mod.rs` once that is cleaned up

use super::{AllowedToEditPaymentStatusUser, ManageUserUser, User};
use crate::model::{
    activity::{self, ActivityBuilder},
    family::Family,
    mail::valid_mails,
    notification::Notification,
    role::Role,
};
use chrono::NaiveDate;
use rocket::{fs::TempFile, tokio::io::AsyncReadExt};
use sqlx::SqlitePool;

impl User {
    pub(crate) async fn add_note(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        note: &str,
    ) -> Result<(), String> {
        let note = note.trim();

        ActivityBuilder::from(activity::Reason::UserDataChange(
            updated_by,
            self,
            note.to_string(),
        ))
        .save(db)
        .await;

        Ok(())
    }

    pub(crate) async fn update_mail(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_mail: &str,
    ) -> Result<(), String> {
        let new_mail = new_mail.trim();

        if !valid_mails(new_mail) {
            return Err(format!(
                "{new_mail} ist kein gültiges Format für eine Mailadresse"
            ));
        }

        sqlx::query!("UPDATE user SET mail = ? where id = ?", new_mail, self.id)
            .execute(db)
            .await
            .unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.mail {
            Some(old_mail) => format!("Mail-Adresse von {old_mail} auf {new_mail} geändert."),
            None => format!("Neue Mail-Adresse für: {new_mail}"),
        };

        ActivityBuilder::from(activity::Reason::UserDataChange(updated_by, self, msg))
            .save(db)
            .await;

        Ok(())
    }

    pub(crate) async fn update_phone(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_phone: &str,
    ) {
        let new_phone = new_phone.trim();

        let query = if new_phone.is_empty() {
            if self.phone.is_none() {
                return; // nothing to do
            }
            sqlx::query!("UPDATE user SET phone = NULL where id = ?", self.id)
        } else {
            if let Some(old_phone) = &self.phone {
                if old_phone == new_phone {
                    return; //nothing to do
                }
            }
            sqlx::query!("UPDATE user SET phone = ? where id = ?", new_phone, self.id)
        };
        query.execute(db).await.unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.phone {
            Some(old_phone) if new_phone.is_empty() => {
                format!("Telefonnummer wurde entfernt (alte Nummer: {old_phone})")
            }
            Some(old_phone) => {
                format!("Telefonnummer wurde von {old_phone} auf {new_phone} geändert.")
            }
            None => format!("Neue Telefonnummer hinzugefügt: {new_phone}"),
        };

        ActivityBuilder::from(activity::Reason::UserDataChange(updated_by, self, msg))
            .save(db)
            .await;
    }

    pub(crate) async fn update_address(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_address: &str,
    ) {
        let new_address = new_address.trim();

        let query = if new_address.is_empty() {
            if self.address.is_none() {
                return; // nothing to do
            }
            sqlx::query!("UPDATE user SET address = NULL where id = ?", self.id)
        } else {
            if let Some(old_address) = &self.address {
                if old_address == new_address {
                    return; //nothing to do
                }
            }
            sqlx::query!(
                "UPDATE user SET address = ? where id = ?",
                new_address,
                self.id
            )
        };
        query.execute(db).await.unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.address {
            Some(old_address) if new_address.is_empty() => format!(
                "{updated_by} hat die Adresse von {self} entfernt (alte Adresse: {old_address})"
            ),
            Some(old_address) => format!(
                "{updated_by} hat die Adresse von {self} von {old_address} auf {new_address} geändert."
            ),
            None => format!("{updated_by} hat eine Adresse für {self} hinzugefügt: {new_address}"),
        };

        ActivityBuilder::new(&msg)
            .relevant_for_user(self)
            .save(db)
            .await;
    }

    pub(crate) async fn update_nickname(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_nickname: &str,
    ) -> Result<(), String> {
        let new_nickname = new_nickname.trim();

        let query = if new_nickname.is_empty() {
            sqlx::query!("UPDATE user SET nickname = NULL where id = ?", self.id)
        } else {
            sqlx::query!(
                "UPDATE user SET nickname = ? where id = ?",
                new_nickname,
                self.id
            )
        };
        query.execute(db).await.unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.nickname {
            Some(old_nickname) if new_nickname.is_empty() => format!(
                "{updated_by} hat den Sitznamen von {self} entfernt (alter Spitzname: {old_nickname})"
            ),
            Some(old_nickname) => format!(
                "{updated_by} hat den Spitznamen von {self} von {old_nickname} auf {new_nickname} geändert."
            ),
            None => format!(
                "{updated_by} hat einen neuen Spitznamen für {self} hinzugefügt: {new_nickname}"
            ),
        };
        ActivityBuilder::new(&msg)
            .relevant_for_user(self)
            .save(db)
            .await;

        Ok(())
    }

    pub(crate) async fn update_member_since(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_member_since_date: &NaiveDate,
    ) {
        sqlx::query!(
            "UPDATE user SET member_since_date = ? where id = ?",
            new_member_since_date,
            self.id
        )
        .execute(db)
        .await
        .unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.member_since_date {
            Some(old_member_since_date) => format!(
                "{updated_by} hat das Beitrittsdatum von {self} von {old_member_since_date} auf {new_member_since_date} geändert."
            ),
            None => format!(
                "{updated_by} hat ein neues Beitrittsdatum für {self} hinzugefügt: {new_member_since_date}"
            ),
        };

        ActivityBuilder::new(&msg)
            .relevant_for_user(self)
            .save(db)
            .await;
    }

    pub(crate) async fn update_birthdate(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        new_birthdate: &NaiveDate,
    ) {
        sqlx::query!(
            "UPDATE user SET birthdate = ? where id = ?",
            new_birthdate,
            self.id
        )
        .execute(db)
        .await
        .unwrap(); //Okay, because we can only create a User of a valid id

        let msg = match &self.birthdate {
            Some(old_birthdate) => format!(
                "{updated_by} hat das Geburtsdatum von {self} von {old_birthdate} auf {new_birthdate} geändert."
            ),
            None => {
                format!("{updated_by} hat ein Geburtsdatum für {self} hinzugefügt: {new_birthdate}")
            }
        };

        ActivityBuilder::new(&msg)
            .relevant_for_user(self)
            .save(db)
            .await;
    }

    pub(crate) async fn update_family(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        family: Option<Family>,
    ) {
        if let Some(family) = family {
            let family_id = family.id;
            sqlx::query!(
                "UPDATE user SET family_id = ? where id = ?",
                family_id,
                self.id
            )
            .execute(db)
            .await
            .unwrap();
            ActivityBuilder::new(&format!(
                "{updated_by} hat {self} zu einer Familie hinzugefügt."
            ))
            .relevant_for_user(self)
            .save(db)
            .await;
        } else {
            sqlx::query!("UPDATE user SET family_id = NULL where id = ?", self.id)
                .execute(db)
                .await
                .unwrap();
            ActivityBuilder::new(&format!(
                "{updated_by} hat die Familienzugehörigkeit von {self} gelöscht."
            ))
            .relevant_for_user(self)
            .save(db)
            .await;
        };

        Family::clean_families_without_members(db).await;
    }

    pub(crate) async fn change_skill(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        skill: Option<Role>,
    ) -> Result<(), String> {
        let old_skill = self.skill(db).await;

        let member = Role::find_by_name(db, "Donau Linz").await.unwrap();
        let cox = Role::find_by_name(db, "cox").await.unwrap();
        let bootsfuehrer = Role::find_by_name(db, "Bootsführer").await.unwrap();

        match (old_skill, skill) {
            (None, new) if new == Some(cox.clone()) => {
                self.add_role(db, updated_by, &cox).await?;
                Notification::create_for_role(
                    db,
                    &member,
                    &format!(
                        "Liebes Vereinsmitglied, {self} ist ab sofort Steuerperson 🎉 Hip hip ...!"
                    ),
                    "Neue Steuerperson",
                    None,
                    None,
                )
                .await;
                Notification::create(
                    db,
                    self,
                    &format!(
                        "Liebe neue Steuerperson, gratuliere zur geschafften Steuerprüfung 💪. Du kannst ab sofort selber Ausfahrten ausschreiben und der Steuerpersonen Signal-Gruppe beitreten: https://signal.group/#CjQKIHJInNb3zSVW7ipLo7_ygIqVxhxUaaNYx4sy2jdklLsIEhBHJNM2KZM1UnBdQxWy_Gdp"
                    ),
                    "Gratulation",
                    None,
                    None,
                )
                .await;
                ActivityBuilder::new(&format!("{updated_by} hat {self} zur Steuerperson gemacht"))
                    .relevant_for_user(self)
                    .save(db)
                    .await;
            }
            (old, new) if old == Some(cox.clone()) && new == Some(bootsfuehrer.clone()) => {
                self.remove_role(db, updated_by, &cox).await?;
                self.add_role(db, updated_by, &bootsfuehrer).await?;
                Notification::create_for_role(
                    db,
                    &member,
                    &format!(
                        "Liebes Vereinsmitglied, {self} ist ab sofort Bootsführer:in 🎉 Hip hip ...!"
                    ),
                    "Neue:r Bootsführer:in",
                    None,
                    None,
                )
                .await;
                ActivityBuilder::new(&format!("{updated_by} hat {self} zum Bootsführer gemacht"))
                    .relevant_for_user(self)
                    .save(db)
                    .await;
            }
            (old, None) => {
                if let Some(old) = old {
                    self.remove_role(db, updated_by, &old).await?;
                    let vorstand = Role::find_by_name(db, "Vorstand").await.unwrap();
                    Notification::create_for_role(
                        db,
                        &vorstand,
                        &format!("Lieber Vorstand, {self} ist ab sofort kein {old} mehr."),
                        "Steuerperson--;",
                        None,
                        None,
                    )
                    .await;
                    ActivityBuilder::new(&format!("{updated_by} hat {self} zum normalen Mitglied gemacht (keine Steuerperson/Schiffsführer mehr)"))
                    .relevant_for_user(self)
                    .save(db)
                    .await;
                }
            }
            (old, new) => return Err(format!("Not allowed to change from {old:?} to {new:?}")),
        };

        Ok(())
    }

    pub(crate) async fn change_financial(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        financial: Option<Role>,
    ) -> Result<(), String> {
        let mut new = String::new();
        let mut old = String::new();

        if let Some(old_financial) = self.financial(db).await {
            self.remove_role(db, updated_by, &old_financial).await?;
            old.push_str(&old_financial.to_string());
        } else {
            old.push_str("Keine Ermäßigung");
        }

        if let Some(new_financial) = financial {
            self.add_role(db, updated_by, &new_financial).await?;
            new.push_str(&new_financial.to_string());
        } else {
            new.push_str("Keine Ermäßigung");
        }

        ActivityBuilder::new(&format!(
            "{updated_by} hat die Ermäßigung von {self} von {old} auf {new} geändert"
        ))
        .relevant_for_user(self)
        .save(db)
        .await;

        Ok(())
    }

    pub(crate) async fn remove_role(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        role: &Role,
    ) -> Result<(), String> {
        if !self.has_role(db, &role.name).await {
            return Err(format!(
                "Kann Rolle {role} von User {self} nicht entfernen, da der User die Rolle gar nicht hat"
            ));
        }

        sqlx::query!(
            "DELETE FROM user_role WHERE user_id = ? and role_id = ?",
            self.id,
            role.id
        )
        .execute(db)
        .await
        .unwrap();

        if !role.hide_in_lists && role.cluster.is_none() {
            ActivityBuilder::new(&format!(
                "{updated_by} hat die Rolle {role} von {self} entfernt."
            ))
            .relevant_for_user(self)
            .save(db)
            .await;
        }

        Ok(())
    }

    pub(crate) async fn has_not_paid(
        &self,
        db: &SqlitePool,
        updated_by: &AllowedToEditPaymentStatusUser,
    ) {
        let paid = Role::find_by_name(db, "paid").await.unwrap();

        sqlx::query!(
            "DELETE FROM user_role WHERE user_id = ? and role_id = ?",
            self.id,
            paid.id
        )
        .execute(db)
        .await
        .unwrap();

        ActivityBuilder::new(&format!(
            "{updated_by} hat den Bezahlstatus von {self} auf 'nicht bezahlt' gesetzt."
        ))
        .relevant_for_user(self)
        .save(db)
        .await;
    }
    pub(crate) async fn has_paid(
        &self,
        db: &SqlitePool,
        updated_by: &AllowedToEditPaymentStatusUser,
    ) {
        let paid = Role::find_by_name(db, "paid").await.unwrap();

        sqlx::query!(
            "INSERT INTO user_role(user_id, role_id) VALUES (?, ?)",
            self.id,
            paid.id
        )
        .execute(db)
        .await
        .expect("paid role has no group");

        ActivityBuilder::new(&format!(
            "{updated_by} hat den Bezahlstatus von {self} auf 'bezahlt' gesetzt."
        ))
        .relevant_for_user(self)
        .save(db)
        .await;
    }

    pub(crate) async fn add_role(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        role: &Role,
    ) -> Result<(), String> {
        if self.has_role(db, &role.name).await {
            return Err(format!(
                "Kann Rolle {role} von User {self} nicht hinzufügen, da der User die Rolle schon hat"
            ));
        }

        sqlx::query!(
            "INSERT INTO user_role(user_id, role_id) VALUES (?, ?)",
            self.id,
            role.id
        )
        .execute(db)
        .await
        .map_err(|_| {
            format!(
                "User already has a role in the cluster '{}'",
                role.cluster
                    .clone()
                    .expect("db trigger can't activate on empty string")
            )
        })?;

        if !role.hide_in_lists && role.cluster.is_none() {
            ActivityBuilder::new(&format!(
                "{updated_by} hat die Rolle '{role}' dem Benutzer {self} hinzugefügt."
            ))
            .relevant_for_user(self)
            .save(db)
            .await;
        }

        Ok(())
    }

    pub(crate) async fn remove_membership_pdf(&self, db: &SqlitePool, updated_by: &ManageUserUser) {
        sqlx::query!(
            "UPDATE user SET membership_pdf = null where id = ?",
            self.id
        )
        .execute(db)
        .await
        .unwrap(); //Okay, because we can only create a User of a valid id
    }
    pub(crate) async fn add_membership_pdf(
        &self,
        db: &SqlitePool,
        updated_by: &ManageUserUser,
        membership_pdf: &TempFile<'_>,
    ) -> Result<(), String> {
        if self.has_membership_pdf(db).await {
            return Err(format!("User {self} hat bereits eine Beitrittserklärung."));
        }
        if membership_pdf.len() == 0 {
            return Err("Keine Beitrittserklärung mitgeschickt.".to_string());
        }

        let mut stream = membership_pdf.open().await.unwrap();
        let mut buffer = Vec::new();
        stream.read_to_end(&mut buffer).await.unwrap();
        sqlx::query!(
            "UPDATE user SET membership_pdf = ? where id = ?",
            buffer,
            self.id
        )
        .execute(db)
        .await
        .unwrap(); //Okay, because we can only create a User of a valid id

        ActivityBuilder::new(&format!(
            "{updated_by} hat die Mitgliedserklärung (PDF) für user {self} hinzugefügt."
        ))
        .relevant_for_user(self)
        .save(db)
        .await;

        Ok(())
    }
}