from enum import IntEnum
from gameconstants import Cells
from gameconstants import Turn
import os


class InputResult(IntEnum):
    MOVE = 1
    PASS = 2
    QUIT = 3


class GameUI:

    def __init__(self, board):

        self.empty_char  = "."
        self.first_char  = "@"
        self.second_char = "O"

        self.x_labels = "abcdefgh"
        self.y_labels = "12345678"

        self.first_turn_label  = "FIRST"
        self.second_turn_label = "SECOND"
        self.user_turn_label   = "UNKNOWN"

        self._board       = board
        self.first_count  = 0
        self.second_count = 0

    # -----------------------------
    # コンソールクリア
    # -----------------------------
    def clear_screen(self):

        os.system("cls" if os.name == "nt" else "clear")

    # -----------------------------
    # 盤面表示
    # -----------------------------
    def draw_board(self):

        first_count  = 0
        second_count = 0

        self.clear_screen()

        print(f" {self.x_labels}")

        for y in range(0,8):

            line = self.y_labels[y]

            for x in range(1,9):

                cell = self._board.get_gameboard_cell(x,y+1)

                if cell == Cells.BLANK :
                    line += self.empty_char

                elif cell == Cells.FIRST_CHIP :
                    first_count += 1
                    line        += self.first_char

                elif cell == Cells.SECOND_CHIP :
                    second_count += 1
                    line         += self.second_char

            print(line)

        self.first_count  = first_count
        self.second_count = second_count

        print()
        print(f"{self.first_turn_label} : {first_count} , {self.second_turn_label} : {second_count}")

        return


    # -----------------------------
    # 終了画面
    # -----------------------------
    def draw_finish_screen(self) :

        print("*** GAME OVER ***")
        print(f"{self.first_turn_label} : {self.first_count} , {self.second_turn_label} : {self.second_count}")

        if self.first_count == self.second_count :
            print(f"draw game.")
        elif self.first_count > self.second_count :
            print("WINNER: {self.first_turn_label}!")
        else :
            print("WINNER: {self.second_turn_label}!")

        return


    # -----------------------------
    # 先手後手選択
    # -----------------------------
    def select_side(self):

        while True:

            text = input("先手(f) / 後手(s) ? > ").strip().lower()

            if text == "f":
                self.user_turn_label   = self.first_turn_label
                return Turn.FIRST

            if text == "s":
                self.user_turn_label   = self.second_turn_label
                return Turn.SECOND

            if text == "q":
                return Turn.QUIT

    # -----------------------------
    # 座標入力
    # -----------------------------
    def input_position(self, allow_pass=False):

        while True:

            text = input(f"{self.user_turn_label} 座標 > ").strip().lower()

            # 中断
            if "q" in text:
                return (InputResult.QUIT, None)

            # パス
            if "z" in text:

                if allow_pass:
                    return (InputResult.PASS, None)

                print("現在パスはできません")
                continue

            pos = self.parse_position(text)

            if pos is None:
                print("入力形式エラー")
                continue

            return (InputResult.MOVE, pos)

    # -----------------------------
    # 座標文字列解析
    # -----------------------------
    def parse_position(self, text):

        parts = text.split(",")

        if len(parts) != 2:
            return None

        a = parts[0].strip()
        b = parts[1].strip()

        # a,1
        result = self._parse_xy(a, b)

        if result is not None:
            return result

        # 1,a
        result = self._parse_xy(b, a)

        return result

    # -----------------------------
    # x,y解析
    # -----------------------------
    def _parse_xy(self, x_text, y_text):

        if x_text not in self.x_labels:
            return None

        if y_text not in self.y_labels:
            return None

        x = self.x_labels.index(x_text) + 1
        y = int(y_text)

        return (x, y)