import sys
import os
from pathlib import Path
project_root = Path(__file__).resolve().parent.parent
if str(project_root) not in sys.path:
    sys.path.insert(0, str(project_root))

from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from pydantic import BaseModel
from typing import List, Optional, Dict, Any

from shortdeck_server.persistence import append_game_history
from shortdeck_server.arena_adapter import ArenaGame

app = FastAPI(title="ShortDeck Poker Server", version="1.0.0")

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

GAME = ArenaGame()

client_path = project_root / "client"
if client_path.exists():
    app.mount("/client", StaticFiles(directory=str(client_path)), name="client")

class JoinRequest(BaseModel):
    name: str


class JoinResponse(BaseModel):
    player_id: int
    name: str


class ActionRequest(BaseModel):
    player_id: int
    action: str # "fold", "call", "raise", "check", "bet"
    amount: Optional[int] = None

class ApiResponse(BaseModel):
    success: bool = True
    message: Optional[str] = None
    data: Optional[Dict[str, Any]] = None
    error: Optional[str] = None

class GameInfo(BaseModel):
    game_id: str
    players: List[str]
    dealer_index: int
    current_turn: int
    stage: str
    total_pot: int
    side_pots: List[Dict[str, Any]]
    player_cards: List[str]
    board_cards: List[str]
    stacks: List[int]
    player_states: List[str]
    current_pot: List[int]
    actions: Dict[str, Any]

class HandStrength(BaseModel):
    hand_type: str
    description: str
    strength: float
    cards: List[str]

class Game1v1Response(BaseModel):
    success: bool
    message: str
    human_player_id: Optional[int] = None
    ai_player_id: Optional[int] = None
    game_id: Optional[str] = None


@app.post("/reset_game")
def reset_game():
    global GAME
    try:
        GAME = ArenaGame()
        return {"success": True, "message": "游戏已重置"}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e

@app.post("/join", response_model=JoinResponse)
def join(req: JoinRequest):
    try:
        print(f"收到加入请求: {req.name}")
        player_id = GAME.join_game(req.name)
        print(f"玩家 {req.name} 成功加入，ID: {player_id}")
        return JoinResponse(player_id=player_id, name=req.name)
    except ValueError as e:
        print(f"加入游戏失败 - ValueError: {e}")
        raise HTTPException(status_code=400, detail=str(e)) from e
    except Exception as e:
        print(f"加入游戏失败 - Exception: {e}")
        import traceback
        traceback.print_exc()
        raise HTTPException(status_code=500, detail=str(e)) from e


@app.get("/get_game_state")
def get_game_state(player_id):
    try:
        state = GAME.info(player_id)
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e
    return state


@app.post("/apply_action", response_model=Dict[str, Any])
def apply_action(req: ActionRequest):
    try:
        result = GAME.apply_action(req.player_id, req.action, req.amount)
        append_game_history(GAME.game_id, {"history": GAME.history})
        return result
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e)) from e

@app.get("/valid_actions/{player_id}")
def get_valid_actions(player_id: int):
    try:
        actions = GAME.get_valid_actions(player_id)
        return {"valid_actions": actions}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e

@app.get("/hand_strength/{player_id}")
def get_hand_strength(player_id: int):
    try:
        strength = GAME.get_hand_strength(player_id)
        return strength
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e


@app.get("/winners")
def get_winners():
    try:
        winners = GAME.get_winners()
        return winners
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e

@app.post("/reset")
def reset_game(request: dict = None):
    try:
        global GAME
        keep_chips = False

        if request and isinstance(request, dict):
            keep_chips = request.get("keep_chips", False)
        
        if keep_chips and GAME and len(GAME.agents) >= 2:
            GAME.reset_hand_keep_chips()
            message = "游戏重置，筹码保持"
        else:
            GAME = ArenaGame()
            message = "游戏完全重置"
        return {"ok": True, "message": message}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e

@app.get("/hand_complete")
def check_hand_complete():
    try:
        is_complete = GAME.check_hand_complete()
        return {"hand_complete": is_complete}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e)) from e


if __name__ == "__main__":
    import uvicorn
    
    print(" Starting ShortDeck Poker Server...")
    print(" Server will run on http://localhost:8001")
    print(" API docs available at http://localhost:8001/docs")
    
    uvicorn.run(
        app,
        host="127.0.0.1", 
        port=8001,
        reload=False
    )