from __future__ import annotations

from typing import List, Dict, Optional
from pathlib import Path

from shortdeck_arena.simulation import Simulation
from shortdeck_arena.agent import HumanAgent
from shortdeck_arena.game_stage import BlindConfig, GameStage, PlayerState
import uuid


class ArenaGame:
    def __init__(self, starting_stack: int = 1000, max_players: int = 6, 
                 small_blind: int = 1, big_blind: int = 2):
        self.agents = []
        self.player_names: List[str] = []
        self.starting_stack = starting_stack
        self.max_players = max_players
        self.sim: Optional[Simulation] = None
        
        # 筹码管理
        self.stacks: List[int] = []
        
        # 盲注配置
        self.blind_config = BlindConfig(small_blind, big_blind, ante=0)
        
        # 游戏标识
        self.game_id = str(uuid.uuid4())

    def join_game(self, name: str) -> int:
        if len(self.player_names) >= self.max_players:
            raise ValueError("table full")
            
        pid = len(self.player_names)
        self.player_names.append(name)
        agent = HumanAgent(pid)
        self.agents.append(agent)
        self.stacks.append(self.starting_stack)

        self.sim = Simulation(self.agents, self.blind_config)
        return pid

    def info(self, player_id: Optional[int] = None) -> Dict:
        """获取游戏状态信息"""
        if not self.sim:
            return {
                "game_id": self.game_id,
                "players": self.player_names,
                "stacks": [],
                "dealer_index": 0,
                "current_turn": 0,
                "pot": 0,
                "stage": "preflop",
                "actions": {},
                "player_cards": [],
                "board_cards": [],
            }

        # 更新栈大小 (扣除已投入底池的金额)
        updated_stacks = []
        for i, base_stack in enumerate(self.stacks):
            pot_contribution = self.sim.pot[i] if i < len(self.sim.pot) else 0
            updated_stacks.append(max(0, base_stack - pot_contribution))
            
        for i in range(len(self.stacks)):
            if i < len(updated_stacks):
                self.stacks[i] = updated_stacks[i]

        player_cards = []
        board_cards = []
        
        # 获取玩家手牌
        try:
            if player_id is not None and 0 <= player_id < len(self.agents):
                player_cards = [str(c) for c in self.sim.player_cards(player_id)]
        except Exception:
            player_cards = []

        # 获取公共牌 (根据当前阶段)
        try:
            current_stage = self.sim.current_stage.value
            board_cards = [str(c) for c in self.sim.board_cards(current_stage)]
        except Exception:
            board_cards = []
        
        # 获取可用动作信息
        actions = {}
        if (player_id is not None and player_id == self.sim.current_turn and 
            self.sim.current_stage != GameStage.FINISHED):
            
            call_amount = self.sim.get_call_amount(player_id)
            available_stack = updated_stacks[player_id] if player_id < len(updated_stacks) else 0
            
            # 更新node_info以包含实际栈信息
            node_info = self.sim.node_info()
            node_info["bet_max"] = available_stack
            
            actions = {
                "call_amount": call_amount,
                "bet_min": node_info["bet_min"],
                "bet_max": node_info["bet_max"],
                "can_check": call_amount == 0,
                "can_fold": True,
                "can_call": call_amount > 0 and call_amount <= available_stack,
                "can_bet": available_stack > call_amount,
            }

        return {
            "game_id": self.game_id,
            "players": self.player_names,
            "stacks": updated_stacks,
            "dealer_index": 0,  # 简化：固定庄家位置, （优化轮询）
            "current_turn": self.sim.current_turn,
            "pot": self.sim.total_pot,
            "stage": self.sim.current_stage.value,
            "actions": actions,
            "player_cards": player_cards,
            "board_cards": board_cards,
            "player_states": [state.value for state in self.sim.player_states],
        }

    def apply_action(self, pid: int, action: str, amount: Optional[int] = None):
        if not self.sim:
            raise ValueError("no game")
            
        # 验证动作合法性
        if pid != self.sim.current_turn:
            raise ValueError(f"not your turn, current turn: {self.sim.current_turn}")
            
        if self.sim.current_stage == GameStage.FINISHED:
            raise ValueError("game already finished")
            
        # 获取玩家可用筹码
        pot_contribution = self.sim.pot[pid] if pid < len(self.sim.pot) else 0
        available_stack = self.stacks[pid] - pot_contribution
        
        # 预处理动作和金额
        action = action.lower()
        
        if action in ("bet", "raise") and amount is not None:
            # 限制下注金额不超过可用筹码
            if amount > available_stack:
                amount = available_stack
                # 如果全下，可能需要标记为allin
                if amount == available_stack and available_stack > 0:
                    self.sim.player_states[pid] = PlayerState.ALLIN
                    
        elif action == "call":
            # call动作的金额验证
            call_amount = self.sim.get_call_amount(pid)
            if call_amount > available_stack:
                # 不够跟注，自动allin
                amount = available_stack
                if available_stack > 0:
                    self.sim.player_states[pid] = PlayerState.ALLIN
        
        try:
            self.sim.apply_action(pid, action, amount)
        except ValueError as e:
            raise ValueError(f"invalid action: {e}")
        
        self.sim.dump_data(Path.cwd() / "shortdeck_arena_history.jsonl")

    @property 
    def current_turn(self) -> int:
        if not self.sim:
            return 0
        return self.sim.current_turn
    
    @property
    def pot(self) -> int:
        if not self.sim:
            return 0
        return self.sim.total_pot
        
    @property
    def history(self) -> List[Dict]:
        if not self.sim:
            return []
        return self.sim.history