// vigyazz6! autplayer

//

use core::{fmt, panic};

use rand::Rng;

use std::mem;

fn main() {

    game();

}

#[derive(Debug)]

struct Card {

    value: i8,

    points: i8,

}

impl Card {

    fn new(value: i8)->Self {

        let mut points = 0;

        if value % 10 == 5 {

            // ends with 5 = 2 point

            points = 2;

            // println!("*5 add 1, val={}, pt={}", value, points);

        }

        if value % 10 == 0 {

            // ends with 0 = 3 point

            points = 3;

            // println!("*0 add 2, val={}, pt={}", value, points);

        }

        if value % 10 == value / 10 {

            // same numbers = 5 points (55=7)

            points += 5;

            // println!("NN add 5, val={}, pt={}", value, points);

        }

        if points == 0 {

            points = 1;

        }

        Card {

            value,

            points,

        }

    }

}

impl fmt::Display for Card {

    fn fmt( &self, f: &mut fmt::Formatter ) -> fmt::Result {

        write!(f, "(Card {}, points {})", self.value, self.points)

    }

}

impl PartialEq for Card {

    fn eq(&self, other: &Self) -> bool {

        self.value == other.value

    }

}

impl Eq for Card {} 

impl PartialOrd for Card {

    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {

        match self.value.partial_cmp(&other.value) {

            Some(core::cmp::Ordering::Equal) => {None}

            ord => return ord,

        }

    }

}

impl Ord for Card {

    fn cmp(&self, other: &Self) -> std::cmp::Ordering {

        self.value.cmp(&other.value)

    }

}

#[derive(Debug)]

struct Deck {

    content: VecDeque<Card>,

}

impl Deck {

    fn new_empty() -> Self {

        Deck {

            content: VecDeque::new(),

        }

    }

    fn new() -> Self {

        Deck {

            content,

        }

    }

    fn shuffle( &mut self ) {

        let mut rng = rand::thread_rng();

        // shufflers:

        // * naive: swap cards n times

        // * kgb: half the deck, take 1..4 cards sequentially from each

        // * grin: take 1..6 from front and put at bottom

        // naive shuffle: exchange random cards

        for _i in 1..=500 {

            let c1 = rng.gen_range(0 .. self.content.len());

            let c2 = rng.gen_range(0 .. self.content.len());

            if c1 != c2 {

                self.content.swap(c1, c2);

            }

        }

    }

    // get top card from deck

    fn pop( &mut self ) -> Option<Card> {

        self.content.pop_front() 

    }

    // put a card into the bottom of the deck

    fn push( &mut self, c: Card ) {

        self.content.push_back(c);

    }

    fn len( &self ) -> usize {

        self.content.len()

    }

    fn get_nth( &mut self, n: usize ) -> Card {

        if let Some(c) = self.content.remove(n) {

            c

        } else {

            panic!("get_nth: index {} out of bounds ({})!", n, self.content.len());

        }

    }

}

#[derive(Debug)]

struct Player {

    name: String,

    hand: Deck,

    game_point: i32,

    total_point: i32,

    rows_busted: i32,

}

impl Player {

    fn new(name: String)->Self {

        Player {

            name,

            hand: Deck::new_empty(),

            game_point: 0,

            total_point: 0,

            rows_busted: 0,

        }

    }

    // get one card from th dealer

    fn get_card( &mut self, card: Card ) {

        self.hand.push(card);

    }

    // throw a card from hand to the table

    fn throw_card( &mut self )->Card {

        if let Some(c) = self.hand.pop() {

            c

        } else {

            panic!("throw_card: Player {} has no card in hand!", self.name);

        }

    }

    // get a busted row of cards

        for c in cards.into_iter() {

            self.game_point += c.points as i32;

        }

        self.rows_busted += 1;

    }

    // ask the player their score

    fn tell_points( self ) -> i32 {

        self.game_point

    }

    // give back cards from the pile

        mem::take( &mut self.pile )

        // same effect:

        // self.pile.drain(..).collect()

        // very cumbersome manual fiddling (also reverted...)

/*         let mut throw: Vec<Card> = Vec::new();

        for _i in 0 .. self.pile.len() {

            throw.push( self.pile.pop().unwrap() );

        }

        throw

 */    

    }

    // I can do this just because I *throw away* c!

    // doesn't work if I want to use it.

/*     fn _gimme_pile(self)->Self {

        for c in &self.pile {

            println!("Throw {} ", c);

        }

        self

    }

 */

    fn close_round( &mut self ) {

        if self.hand.len() > 0 {

            panic!("Closing round when {} has {} cards in hand", self.name, self.hand.len());

        }

        if self.pile.len() > 0 {

            panic!("Closing round when {} stil have pile with {} cards", self.name, self.pile.len());

        }

        self.total_point += self.game_point;

        self.game_point = 0;

    }

}

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

#[derive(Debug)]

struct Row {

    cards: VecDeque<Card>,

}

impl Row {

    const MAX_LEN: usize = 5;

    fn new() -> Self {

        Row {

            cards: VecDeque::new(),

        }

    }

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

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

            self.cards.push_back(card);

            None

        } else {

            // 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)

        }

    }

    fn last_card_value(&self) -> i8 {

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

    }

}

#[derive(Debug)]

struct PlayerCard {

    player_id: i32,

    card: Card,

}

impl PlayerCard {

    fn get_player(&self) -> i32 {

        self.player_id

    }

}