from fastapi import APIRouter, Query, HTTPException, Body
from app.services.bybit_service import get_bybit_client
import json
import os
from typing import List, Optional

router = APIRouter()

ACCOUNTS_FILE = os.path.join(os.path.dirname(__file__), '../../accounts.json')

def get_user_api(user_id: str):
    try:
        with open(ACCOUNTS_FILE, 'r', encoding='utf-8') as f:
            accounts = json.load(f)
        for acc in accounts:
            if acc['id'] == user_id:
                return acc['bybit_api_key'], acc['bybit_api_secret']
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi đọc file accounts: {e}")
    raise HTTPException(status_code=404, detail="Không tìm thấy userId")

# API lấy danh sách user
@router.get("/users")
def list_users():
    try:
        with open(ACCOUNTS_FILE, 'r', encoding='utf-8') as f:
            accounts = json.load(f)
        return accounts
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi đọc file accounts: {e}")

# API thêm user
@router.post("/users")
def add_user(
    id: str = Body(..., description="ID user"),
    bybit_api_key: str = Body(..., description="Bybit API Key"),
    bybit_api_secret: str = Body(..., description="Bybit API Secret"),
    user_name: str = Body(..., description="Tên user")
):
    try:
        with open(ACCOUNTS_FILE, 'r+', encoding='utf-8') as f:
            accounts = json.load(f)
            if any(acc['id'] == id for acc in accounts):
                raise HTTPException(status_code=400, detail="ID đã tồn tại")
            new_user = {
                "id": id,
                "bybit_api_key": bybit_api_key,
                "bybit_api_secret": bybit_api_secret,
                "user_name": user_name
            }
            accounts.append(new_user)
            f.seek(0)
            json.dump(accounts, f, ensure_ascii=False, indent=2)
            f.truncate()
        return {"message": "Thêm user thành công"}
    except HTTPException as e:
        raise e
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi ghi file accounts: {e}")

# API sửa user
@router.put("/users/{user_id}")
def update_user(
    user_id: str,
    bybit_api_key: Optional[str] = Body(None),
    bybit_api_secret: Optional[str] = Body(None),
    user_name: Optional[str] = Body(None)
):
    try:
        with open(ACCOUNTS_FILE, 'r+', encoding='utf-8') as f:
            accounts = json.load(f)
            for acc in accounts:
                if acc['id'] == user_id:
                    if bybit_api_key is not None:
                        acc['bybit_api_key'] = bybit_api_key
                    if bybit_api_secret is not None:
                        acc['bybit_api_secret'] = bybit_api_secret
                    if user_name is not None:
                        acc['user_name'] = user_name
                    f.seek(0)
                    json.dump(accounts, f, ensure_ascii=False, indent=2)
                    f.truncate()
                    return {"message": "Cập nhật user thành công"}
            raise HTTPException(status_code=404, detail="Không tìm thấy userId")
    except HTTPException as e:
        raise e
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi ghi file accounts: {e}")

# API xóa user
@router.delete("/users/{user_id}")
def delete_user(user_id: str):
    try:
        with open(ACCOUNTS_FILE, 'r+', encoding='utf-8') as f:
            accounts = json.load(f)
            new_accounts = [acc for acc in accounts if acc['id'] != user_id]
            if len(new_accounts) == len(accounts):
                raise HTTPException(status_code=404, detail="Không tìm thấy userId")
            f.seek(0)
            json.dump(new_accounts, f, ensure_ascii=False, indent=2)
            f.truncate()
        return {"message": "Xóa user thành công"}
    except HTTPException as e:
        raise e
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi ghi file accounts: {e}")

@router.get("/account")
def get_account_info(userId: str = Query(..., description="ID của user để lấy API key/secret")):
    try:
        api_key, api_secret = get_user_api(userId)
        client = get_bybit_client(api_key, api_secret)
        res = client.get_wallet_balance(accountType="UNIFIED")
        if 'retCode' in res and res['retCode'] != 0:
            raise HTTPException(status_code=400, detail=f"Bybit API error: {res.get('retMsg', 'Unknown error')}")
        return res
    except HTTPException as e:
        raise e
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Lỗi hệ thống: {e}")