/*** Row ****/

// a row of cards on the table (max 5)

use std::{collections::VecDeque, mem};

use crate::card::Card;

#[derive(Debug)]

pub(crate) struct Row {

    cards: VecDeque<Card>,

}

impl Row {

    const MAX_LEN: usize = 5;

    pub(crate) fn new() -> Self {

        Row {

            cards: VecDeque::with_capacity(5),

        }

    }

    pub(crate) fn push_or_collect( &mut self, card: Card ) -> Option<VecDeque<Card>> {

        trace!("Called push_or_collect on row {:?}", &self);

        if self.cards.len() < Self::MAX_LEN {

            trace!("Less than {} cards, putting at the end", Self::MAX_LEN);

            self.cards.push_back(card);

            None

        } else {

            trace!("Row is full, len {}, maxlen {}", self.cards.len(), Self::MAX_LEN);

            // row overflow

            let row_cards = mem::take( &mut self.cards );

            self.cards.push_back(card);

            if self.cards.len() != 1 {

                panic!("New row must have one card, not {}", self.cards.len());

            }

            Some(row_cards)

        }

    }

    pub(crate) fn take_row( &mut self ) -> VecDeque<Card> {

        // take cards and empty the row

        mem::take( &mut self.cards )

    }

    pub(crate) fn last_card_value(&self) -> i8 {

        // println!("last_card_value: cards {:?}, len {}", self.cards, self.cards.len());

        self.cards.get( self.cards.len()-1 ).unwrap().value

    }

    // sum of row card points

    pub(crate) fn sum(&self) -> i32 {

        let mut sum: i32 = 0;

        self.cards.iter().for_each(|card| {

            sum += card.points as i32;

        });

        sum

    }

    pub fn len(&self) -> usize {

        self.cards.len()

    }

}