use axum::{
    response::IntoResponse,
    extract::{Json, Path},
    Extension,
};
use axum_extra::extract::CookieJar;
use tetratto_shared::snow::Snowflake;
use crate::{
    get_user_from_token,
    routes::api::v1::{
        AddJournalDir, CreateJournal, RemoveJournalDir, UpdateJournalPrivacy, UpdateJournalTitle,
    },
    State,
};
use tetratto_core::{
    database::NAME_REGEX,
    model::{
        auth::AchievementName,
        journals::{Journal, JournalPrivacyPermission},
        oauth,
        permissions::FinePermission,
        ApiReturn, Error,
    },
};

pub async fn get_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserReadJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    let journal = match data.get_journal_by_id(id).await {
        Ok(x) => x,
        Err(e) => return Json(e.into()),
    };

    if journal.privacy == JournalPrivacyPermission::Private
        && user.id != journal.owner
        && !user.permissions.contains(FinePermission::MANAGE_JOURNALS)
    {
        return Json(Error::NotAllowed.into());
    }

    Json(ApiReturn {
        ok: true,
        message: "Success".to_string(),
        payload: Some(journal),
    })
}

pub async fn get_css_request(
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;

    let note = match data.get_note_by_journal_title(id, "journal.css").await {
        Ok(x) => x,
        Err(e) => {
            return (
                [("Content-Type", "text/css"), ("Cache-Control", "no-cache")],
                format!("/* {e} */"),
            );
        }
    };

    (
        [("Content-Type", "text/css"), ("Cache-Control", "no-cache")],
        note.content,
    )
}

pub async fn list_request(jar: CookieJar, Extension(data): Extension<State>) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserReadJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    match data.get_journals_by_user(user.id).await {
        Ok(x) => Json(ApiReturn {
            ok: true,
            message: "Success".to_string(),
            payload: Some(x),
        }),
        Err(e) => Json(e.into()),
    }
}

pub async fn create_request(
    jar: CookieJar,
    Extension(data): Extension<State>,
    Json(props): Json<CreateJournal>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let mut user = match get_user_from_token!(jar, data, oauth::AppScope::UserCreateJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    match data
        .create_journal(Journal::new(user.id, props.title))
        .await
    {
        Ok(x) => {
            // award achievement
            if let Err(e) = data
                .add_achievement(&mut user, AchievementName::CreateJournal.into())
                .await
            {
                return Json(e.into());
            }

            // ...
            Json(ApiReturn {
                ok: true,
                message: "Journal created".to_string(),
                payload: Some(x.id.to_string()),
            })
        }
        Err(e) => Json(e.into()),
    }
}

pub async fn update_title_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
    Json(mut props): Json<UpdateJournalTitle>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserManageJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    props.title = props.title.replace(" ", "_").to_lowercase();

    // check name
    let regex = regex::RegexBuilder::new(NAME_REGEX)
        .multi_line(true)
        .build()
        .unwrap();

    if regex.captures(&props.title).is_some() {
        return Json(Error::MiscError("This title contains invalid characters".to_string()).into());
    }

    // make sure this title isn't already in use
    if data
        .get_journal_by_owner_title(user.id, &props.title)
        .await
        .is_ok()
    {
        return Json(Error::TitleInUse.into());
    }

    // ...
    match data.update_journal_title(id, &user, &props.title).await {
        Ok(_) => Json(ApiReturn {
            ok: true,
            message: "Journal updated".to_string(),
            payload: (),
        }),
        Err(e) => Json(e.into()),
    }
}

pub async fn update_privacy_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
    Json(props): Json<UpdateJournalPrivacy>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserManageJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    match data.update_journal_privacy(id, &user, props.privacy).await {
        Ok(_) => Json(ApiReturn {
            ok: true,
            message: "Journal updated".to_string(),
            payload: (),
        }),
        Err(e) => Json(e.into()),
    }
}

pub async fn delete_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserManageJournals) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    match data.delete_journal(id, &user).await {
        Ok(_) => Json(ApiReturn {
            ok: true,
            message: "Journal deleted".to_string(),
            payload: (),
        }),
        Err(e) => Json(e.into()),
    }
}

pub async fn add_dir_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
    Json(props): Json<AddJournalDir>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserManageNotes) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    if props.name.len() > 32 {
        return Json(Error::DataTooLong("name".to_string()).into());
    }

    let mut journal = match data.get_journal_by_id(id).await {
        Ok(x) => x,
        Err(e) => return Json(e.into()),
    };

    // add dir
    journal.dirs.push((
        Snowflake::new().to_string().parse::<usize>().unwrap(),
        match props.parent.parse() {
            Ok(p) => p,
            Err(_) => return Json(Error::Unknown.into()),
        },
        props.name,
    ));

    // ...
    match data.update_journal_dirs(id, &user, journal.dirs).await {
        Ok(_) => Json(ApiReturn {
            ok: true,
            message: "Journal updated".to_string(),
            payload: (),
        }),
        Err(e) => Json(e.into()),
    }
}

pub async fn remove_dir_request(
    jar: CookieJar,
    Path(id): Path<usize>,
    Extension(data): Extension<State>,
    Json(props): Json<RemoveJournalDir>,
) -> impl IntoResponse {
    let data = &(data.read().await).0;
    let user = match get_user_from_token!(jar, data, oauth::AppScope::UserManageNotes) {
        Some(ua) => ua,
        None => return Json(Error::NotAllowed.into()),
    };

    let mut journal = match data.get_journal_by_id(id).await {
        Ok(x) => x,
        Err(e) => return Json(e.into()),
    };

    // add dir
    let dir_id: usize = match props.dir.parse() {
        Ok(x) => x,
        Err(_) => return Json(Error::Unknown.into()),
    };

    journal
        .dirs
        .remove(match journal.dirs.iter().position(|x| x.0 == dir_id) {
            Some(idx) => idx,
            None => return Json(Error::GeneralNotFound("directory".to_string()).into()),
        });

    // ...
    match data.update_journal_dirs(id, &user, journal.dirs).await {
        Ok(_) => Json(ApiReturn {
            ok: true,
            message: "Journal updated".to_string(),
            payload: (),
        }),
        Err(e) => Json(e.into()),
    }
}