use chrono::{NaiveDate, NaiveTime};
use rinja::Template;

use crate::filters;
use crate::models::{Availability, AvailabilityChangeset, AvailabilityTime, Role, User};

pub mod delete;
pub mod get_new;
pub mod get_overview;
pub mod get_update;
pub mod post_new;
pub mod post_update;

#[derive(Template)]
#[template(path = "availability/new_or_edit.html")]
struct NewOrEditAvailabilityTemplate<'a> {
    user: User,
    date: NaiveDate,
    id: Option<i32>,
    time_selection: AvailabilityTime,
    comment: Option<&'a str>,
    slot_suggestions: Vec<(NaiveTime, NaiveTime)>,
}

fn find_adjacend_availability<'a>(
    changeset: &AvailabilityChangeset,
    availability_id_to_be_updated: Option<i32>,
    existing_availabilities: &'a [Availability],
) -> Option<&'a Availability> {
    let AvailabilityTime::Temporarily(changeset_start, changeset_end) = changeset.time else {
        return None;
    };

    for a in existing_availabilities
        .iter()
        .filter(|a| availability_id_to_be_updated.is_none_or(|id| a.id != id))
    {
        if let AvailabilityTime::Temporarily(start, end) = a.time {
            if start == changeset_end || end == changeset_start {
                return Some(a);
            }
        }
    }

    None
}