from utils.response_builder import ResponseBuilder
from typing import Dict, Union, List
import random
from datetime import datetime, timedelta
import uuid
import logging

# 配置日志
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


class StatementService:
    """流水数据服务"""

    def __init__(self):
        # 缓存：logId -> (statements_list, total_count)
        self._cache: Dict[int, tuple] = {}
        # 配置日志级别为 INFO
        logger.info(f"StatementService initialized with empty cache")

    def _generate_random_statement(self, index: int, group_id: int, log_id: int) -> Dict:
        """生成单条随机流水记录

        Args:
            index: 流水序号
            group_id: 项目ID
            log_id: 文件ID

        Returns:
            单条流水记录字典
        """
        # 随机生成交易日期（最近1年内）
        days_ago = random.randint(0, 365)
        trx_datetime = datetime.now() - timedelta(days=days_ago)
        trx_date = trx_datetime.strftime("%Y-%m-%d %H:%M:%S")
        accounting_date = trx_datetime.strftime("%Y-%m-%d")
        accounting_date_id = int(trx_datetime.strftime("%Y%m%d"))

        # 生成创建日期（格式：YYYY-MM-DD HH:MM:SS）
        create_date = datetime.now().strftime("%Y-%m-%d %H:%M:%S")

        # 随机生成交易金额
        trans_amount = round(random.uniform(10, 10000), 2)

        # 随机决定是收入还是支出
        if random.random() > 0.5:
            # 支出
            dr_amount = trans_amount
            cr_amount = 0
            trans_flag = "P"
        else:
            # 收入
            cr_amount = trans_amount
            dr_amount = 0
            trans_flag = "R"

        # 随机余额
        balance_amount = round(random.uniform(1000, 50000), 2)

        # 随机客户信息
        customers = ["小店", "支付宝", "微信支付", "财付通", "美团", "京东", "淘宝", "银行转账"]
        customer_name = random.choice(customers)
        customer_account = str(random.randint(100000000, 999999999))

        # 随机交易描述
        memos = [
            f"消费_{customer_name}",
            f"转账_{customer_name}",
            f"收款_{customer_name}",
            f"支付_{customer_name}",
            f"退款_{customer_name}",
        ]
        user_memo = random.choice(memos)

        return {
            "accountId": 0,
            "accountMaskNo": f"{random.randint(100000000000000, 999999999999999)}",
            "accountingDate": accounting_date,
            "accountingDateId": accounting_date_id,
            "archivingFlag": 0,
            "attachments": 0,
            "balanceAmount": balance_amount,
            "bank": "ZJRCU",
            "bankComments": "",
            "bankStatementId": 12847662 + index,
            "bankTrxNumber": uuid.uuid4().hex,
            "batchId": log_id,
            "cashType": "1",
            "commentsNum": 0,
            "crAmount": cr_amount,
            "createDate": create_date,
            "createdBy": "902001",
            "cretNo": "230902199012261247",
            "currency": "CNY",
            "customerAccountMaskNo": customer_account,
            "customerBank": "",
            "customerId": -1,
            "customerName": customer_name,
            "customerReference": "",
            "downPaymentFlag": 0,
            "drAmount": dr_amount,
            "exceptionType": "",
            "groupId": group_id,
            "internalFlag": 0,
            "leId": 16308,
            "leName": "张传伟",
            "overrideBsId": 0,
            "paymentMethod": "",
            "sourceCatalogId": 0,
            "split": 0,
            "subBankstatementId": 0,
            "toDoFlag": 0,
            "transAmount": trans_amount,
            "transFlag": trans_flag,
            "transTypeId": 0,
            "transformAmount": 0,
            "transformCrAmount": 0,
            "transformDrAmount": 0,
            "transfromBalanceAmount": 0,
            "trxBalance": 0,
            "trxDate": trx_date,
            "uploadSequnceNumber": index + 1,
            "userMemo": user_memo
        }



    def _generate_statements(self, group_id: int, log_id: int, count: int) -> List[Dict]:
        """生成指定数量的流水记录

        Args:
            group_id: 项目ID
            log_id: 文件ID
            count: 生成数量

        Returns:
            流水记录列表
        """
        statements = []
        for i in range(count):
            statements.append(self._generate_random_statement(i, group_id, log_id))
        return statements

    def get_bank_statement(self, request: Union[Dict, object]) -> Dict:
        """获取银行流水列表

        Args:
            request: 获取银行流水请求（可以是字典或对象）

        Returns:
            银行流水响应字典
        """
        # 支持 dict 或对象
        if isinstance(request, dict):
            group_id = request.get("groupId", 1000)
            log_id = request.get("logId", 10000)
            page_now = request.get("pageNow", 1)
            page_size = request.get("pageSize", 10)
        else:
            group_id = request.groupId
            log_id = request.logId
            page_now = request.pageNow
            page_size = request.pageSize

        # 检查缓存中是否已有该logId的数据
        if log_id not in self._cache:
            # 随机生成总条数（1200-1500之间）
            total_count = random.randint(1200, 1500)
            # 生成所有流水记录
            all_statements = self._generate_statements(group_id, log_id, total_count)
            # 存入缓存
            self._cache[log_id] = (all_statements, total_count)

        # 从缓存获取数据
        all_statements, total_count = self._cache[log_id]

        # 模拟分页
        start = (page_now - 1) * page_size
        end = start + page_size
        page_data = all_statements[start:end]

        return {
            "code": "200",
            "data": {"bankStatementList": page_data, "totalCount": total_count},
            "status": "200",
            "successResponse": True,
        }