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#![allow(dead_code, unused_imports, unused_variables, unused_must_use)]

extern crate rand;

mod color;
mod peg;

pub use color::Color;
use rand::Rng;
use std::fmt;
use std::io;
use io::Write;
pub use peg::Peg;



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

    #[test]
    fn test_game_step() {

        let mut state = GameState::new(4);
        let guess = vec![Peg::new(Color::Red), Peg::new(Color::Red), Peg::new(Color::Red), Peg::new(Color::Red)];
        let validity = state.step(guess);

        println!("{:?}", validity);
        // cargo test -- --nocapture
    }
}


#[derive(Debug)]
pub enum Correctness {
    Partial,
    Total,
}

impl fmt::Display for Correctness {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}

pub struct GameState {
    answer: Vec<Peg>,
    current_turn: u32,
}

impl GameState {
    pub fn new(num_pegs: usize) -> GameState {
        let answer: Vec<Peg> = (0..num_pegs)
            .map(|x: usize| Peg::new_random())
            .collect();

        GameState::new_with_answer(answer)
    }

    pub fn new_with_answer(answer: Vec<Peg>) -> GameState {
        GameState {
            answer,
            current_turn: 0,
        }
    }

    pub fn step(&mut self, guess: Vec<Peg>) -> Vec<Correctness> {
        self.current_turn += 1;

        self.make_guess_response(guess)
    }

    fn make_guess_response(&mut self, mut guess: Vec<Peg>) -> Vec<Correctness> {
        use Correctness::*;

        let mut answer = self.answer.clone();
        // println!("ANSWER {:?}", self.answer);
        let mut result: Vec<Correctness> = Vec::new();

        for i in 0..guess.len() {
            if guess[i].color() == answer[i].color() && !answer[i].found() {
                result.push(Total);
                answer[i].find();
                guess[i].find();
            }
        }

        guess.retain(|p| !p.found());
        answer.retain(|p| !p.found());

        for g in guess.iter() {
            answer.iter()
                .position(|p| p.color() == g.color())
                .map(|index| {
                    if !answer[index].found() {
                        result.push(Partial);
                        answer[index].find();
                    }
                });
        }
        result
    }
}