from enum import StrEnum
from enum import Enum, auto
from pathlib import Path
from typing import Dict

from PyQt6.QtCore import Qt
from PyQt6.QtGui import QIcon, QPixmap, QPainter


# Paths
PACKAGE_ROOT = Path(__file__).resolve().parent
VIEW_ROOT = PACKAGE_ROOT / "view"
RESOURCES_DIR = VIEW_ROOT / "resources"

ROLE_TYPE = Qt.ItemDataRole.UserRole
ROLE_ID = Qt.ItemDataRole.UserRole + 1


class IconName(str, Enum):
    UNDO = "undo"
    REDO = "redo"
    PAIRING = "pairing"
    DRAW = "draw"
    TIEBREAK = "tie-break"
    DELETE = "delete"
    SAVE_AS = "save_as"
    SAVE = "save"
    NEW = "new"
    EXIT = "exit"
    END = "end"
    OPEN = "load"
    ONGOING = "ongoing"
    EXPORT = "export"
    EDIT = "edit"
    ADD = "add"
    ABOUT = "about"
    WARS = "wars"
    DONE = "done"
    WIN = "win"
    PLAYERS = "players"
    WARCHRON = "warchron"
    TOKEN = "token"
    TOKENS = "tokens"
    TIEBREAK_TOKEN = auto()


class Icons:
    _icon_cache: Dict[IconName, QIcon] = {}

    _pixmap_cache: Dict[IconName, QPixmap] = {}

    _paths = {
        IconName.UNDO: "arrow-curve-180-left",
        IconName.REDO: "arrow-curve",
        IconName.PAIRING: "arrow-switch",
        IconName.DRAW: "balance.png",
        IconName.TIEBREAK: "balance-unbalance.png",
        IconName.DELETE: "cross.png",
        IconName.SAVE_AS: "disk--pencil.png",
        IconName.SAVE: "disk.png",
        IconName.NEW: "document.png",
        IconName.EXIT: "door--arrow.png",
        IconName.END: "flag-white.png",
        IconName.OPEN: "folder.png",
        IconName.ONGOING: "hourglass.png",
        IconName.EXPORT: "notebook--arrow.png",
        IconName.EDIT: "pencil.png",
        IconName.ADD: "plus.png",
        IconName.ABOUT: "question.png",
        IconName.WARS: "swords-small.png",
        IconName.DONE: "tick.png",
        IconName.WIN: "trophy.png",
        IconName.PLAYERS: "users.png",
        IconName.WARCHRON: "warchron_logo.png",
        IconName.TOKEN: "point.png",
        IconName.TOKENS: "points.png",
    }

    @classmethod
    def get(cls, name: IconName) -> QIcon:
        if name not in cls._icon_cache:
            path = RESOURCES_DIR / cls._paths[name]
            cls._icon_cache[name] = QIcon(str(path))
        return cls._icon_cache[name]

    @classmethod
    def get_pixmap(cls, name: IconName) -> QPixmap:
        if name in cls._pixmap_cache:
            return cls._pixmap_cache[name]
        if name == IconName.TIEBREAK_TOKEN:
            pix = cls._compose(
                cls.get_pixmap(IconName.TIEBREAK),
                cls.get_pixmap(IconName.TOKEN),
            )
        else:
            path = RESOURCES_DIR / cls._paths[name]
            pix = QPixmap(path.as_posix())
        cls._pixmap_cache[name] = pix
        return pix

    @staticmethod
    def _compose(left: QPixmap, right: QPixmap) -> QPixmap:
        w = left.width() + right.width()
        h = max(left.height(), right.height())
        result = QPixmap(w, h)
        result.fill(Qt.GlobalColor.transparent)
        painter = QPainter(result)
        painter.drawPixmap(0, (h - left.height()) // 2, left)
        painter.drawPixmap(left.width(), (h - right.height()) // 2, right)
        painter.end()
        return result


class ItemType(StrEnum):
    PLAYER = "player"
    WAR = "war"
    CAMPAIGN = "campaign"
    ROUND = "round"
    OBJECTIVE = "objective"
    WAR_PARTICIPANT = "war_participant"
    SECTOR = "sector"
    CAMPAIGN_PARTICIPANT = "campaign_participant"
    CHOICE = "choice"
    BATTLE = "battle"


class RefreshScope(Enum):
    NONE = auto()
    PLAYERS_LIST = auto()
    WARS_TREE = auto()
    WAR_DETAILS = auto()
    CAMPAIGN_DETAILS = auto()
    ROUND_DETAILS = auto()
    CURRENT_SELECTION_DETAILS = auto()


class ContextType(StrEnum):
    WAR = "war"
    CAMPAIGN = "campaign"
    CHOICE = "choice"
    BATTLE = "battle"