package main

import (
	"bufio"
	"fmt"
	"os"
)

var debug = 0

func main() {

	if os.Getenv("DEBUG") == "true" {
		debug = 1
	}

	words, length, err := getWordsFromStdin()
	if err != nil {
		fmt.Printf("Error getting Words from stdin: %s\n", err)
		os.Exit(1)
	}

	game := NewGame()
	game.Words = words
	game.Length = length

	for i := 0; i < 3; i++ {
		simulator := NewSimulator(*game)
		_, err = simulator.SimulateAllPossibleGames()
		if err != nil {
			fmt.Printf("Error simulating all possible games: %s\n", err)
			os.Exit(1)
		}

		guess, score := getGuessAndScoreFromStdin()
		game.FilterWords(guess, score)

		if len(game.Words) == 0 {
			fmt.Printf("\n\nFATAL ERROR: something went wrong!  No words are left, this shouldn't happen!!!!!!!\n\n")
			os.Exit(1)

		} else if len(game.Words) == 1 {
			for word := range game.Words {
				fmt.Printf("\n\nThe answer is: %s\n\n", word)
				os.Exit(0)
			}
		}

	}
}

func getGuessAndScoreFromStdin() (string, int) {
	reader := bufio.NewReader(os.Stdin)
	fmt.Print("Enter Guess: ")
	guess, _ := reader.ReadString('\n')
	guess = guess[:len(guess)-1]

	fmt.Print("Enter Score: ")
	var score int
	_, err := fmt.Scanf("%d", &score)
	if err != nil {
		fmt.Printf("Error reading score: %s\n", err)
		os.Exit(1)
	}
	fmt.Print("\n")

	return guess, score
}

func getWordsFromStdin() (map[string]*Word, int, error) {

	fmt.Println("Enter Words, one per line. Enter a period to end input.")

	var length int
	words := make(map[string]*Word)

	for {
		reader := bufio.NewReader(os.Stdin)
		word, _ := reader.ReadString('\n')
		word = word[:len(word)-1]
		if word == "." {
			fmt.Print("\nOK!\n\n")
			break
		}

		if length == 0 {
			length = len(word)
		} else {
			if len(word) != length {
				fmt.Printf("Error: All words must be the same length (%d), skipping: %s\n", length, word)
				continue
			}
		}
		words[word] = &Word{Word: word}
	}

	return words, length, nil
}

func debugPrint(format string, args ...interface{}) {
	if debug == 1 {
		fmt.Printf(format, args...)
	}
}