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/*
* Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

use actix_identity::Identity;
use actix_web::{HttpResponse, Responder};
use sailfish::TemplateOnce;
use sqlx::types::time::OffsetDateTime;

use crate::api::v1::notifications::get::{self, runner};
use crate::errors::PageResult;
use crate::AppData;

const MINUTE: i64 = 60;
const HOUR: i64 = MINUTE * 60;
const DAY: i64 = HOUR * 24;
const WEEK: i64 = DAY * 7;

#[derive(TemplateOnce)]
#[template(path = "panel/notifications/index.html")]
pub struct IndexPage {
    /// notifications
    n: Vec<Notification>,
}

impl IndexPage {
    fn new(n: Vec<Notification>) -> Self {
        IndexPage { n }
    }
}

pub struct Notification {
    pub name: String,
    pub heading: String,
    pub message: String,
    pub received: OffsetDateTime,
    pub id: i32,
}

impl From<get::Notification> for Notification {
    fn from(n: get::Notification) -> Self {
        Notification {
            name: n.name.unwrap(),
            heading: n.heading.unwrap(),
            received: n.received.unwrap(),
            id: n.id.unwrap(),
            message: n.message.unwrap(),
        }
    }
}

impl Notification {
    pub fn print_date(&self) -> String {
        let date = self.received;
        let timestamp = self.received.unix_timestamp();
        let now = OffsetDateTime::now_utc().unix_timestamp();

        let difference = now - timestamp;

        if difference >= 3 * WEEK {
            date.format("%d-%m-%y")
        } else if (DAY..(3 * WEEK)).contains(&difference) {
            format!("{} days ago", date.hour())
        } else if (HOUR..DAY).contains(&difference) {
            format!("{} hours ago", date.hour())
        } else if (MINUTE..HOUR).contains(&difference) {
            format!("{} minutes ago", date.minute())
        } else {
            format!("{} seconds ago", date.second())
        }
    }
}

const PAGE: &str = "Notifications";

#[my_codegen::get(path = "crate::PAGES.panel.notifications", wrap = "crate::CheckLogin")]
pub async fn notifications(data: AppData, id: Identity) -> PageResult<impl Responder> {
    let receiver = id.identity().unwrap();
    // TODO handle error where payload.to doesnt exist

    let mut notifications = runner::get_notification(&data, &receiver).await?;
    let notifications = notifications.drain(0..).map(|x| x.into()).collect();

    let body = IndexPage::new(notifications).render_once().unwrap();
    Ok(HttpResponse::Ok()
        .content_type("text/html; charset=utf-8")
        .body(body))
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn print_date_test() {
        let mut n = Notification {
            received: OffsetDateTime::now_utc(),
            name: String::default(),
            heading: String::default(),
            message: String::default(),
            id: 1,
        };

        let timestamp = n.received.unix_timestamp();
        println!("timestamp: {}", timestamp);

        // seconds test
        assert!(n.print_date().contains("seconds ago"));
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - 5);
        assert!(n.print_date().contains("seconds ago"));

        // minutes test
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - MINUTE * 2);
        assert!(n.print_date().contains("minutes ago"));
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - MINUTE * 56);
        assert!(n.print_date().contains("minutes ago"));

        // hours test
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - HOUR);
        assert!(n.print_date().contains("hours ago"));
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - HOUR * 23);
        assert!(n.print_date().contains("hours ago"));

        // days test
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - 2 * WEEK);
        assert!(n.print_date().contains("days ago"));

        // date test
        n.received = OffsetDateTime::from_unix_timestamp(timestamp - 6 * WEEK);
        let date = n.received.format("%d-%m-%y");
        assert!(n.print_date().contains(&date))
    }
}