use crate::{Context, Error};

use chrono::NaiveDate;
use uuid::{uuid, Uuid};

const STERRE_BIB_ID: Uuid = uuid!("4737e57a-ee05-4f7b-901a-7bb541eeb297");
const TIME_FORMAT: &str = "%H:%M";

/// List available timeslots for day
#[poise::command(prefix_command, slash_command)]
pub async fn available(ctx: Context<'_>, date: NaiveDate) -> Result<(), Error> {
    let client = &ctx.data().client;
    let resources = client.available(STERRE_BIB_ID, date, 1).await?;
    let mut fields: Vec<(String, String, bool)> = Default::default();

    for resource in &resources {
        let available_hours = resource.condensed_available_hours();

        if available_hours.is_empty() {
            fields.push((
                resource.resource_name.clone(),
                "Nothing available.".to_string(),
                false,
            ));

            continue;
        }

        fields.push((
            resource.resource_name.clone(),
            available_hours
                .into_iter()
                .map(|(start_block, duration)| {
                    format!(
                        "{} - {} ({:02}:{:02})",
                        start_block.hour.format(TIME_FORMAT),
                        (start_block.hour + duration).format(TIME_FORMAT),
                        duration.num_hours(),
                        duration.num_minutes() % 60
                    )
                })
                .collect::<Vec<String>>()
                .join("\n"),
            false,
        ));
    }

    ctx.send(|f| {
        f.embed(|e| {
            e.description(format!("Available booking dates for {}.", date))
                .fields(fields)
        })
    })
    .await?;

    Ok(())
}

// Create a reservation
// #[poise::command(prefix_command, slash_command)]
// pub async fn reserve(
//     ctx: Context<'_>,
//     date: NaiveDate,
// ) -> Result<(), Error> {

// }