package admin_agent

import (
	"context"
	"database/sql"
	"fmt"
	"os"
	"time"
	"ycc-server/common/xerr"
	"ycc-server/pkg/lzkit/lzUtils"

	"github.com/pkg/errors"
	"github.com/zeromicro/go-zero/core/stores/sqlx"

	"ycc-server/app/main/api/internal/svc"
	"ycc-server/app/main/api/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
)

type AdminAuditWithdrawalLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewAdminAuditWithdrawalLogic(ctx context.Context, svcCtx *svc.ServiceContext) *AdminAuditWithdrawalLogic {
	return &AdminAuditWithdrawalLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// parseFloat 解析配置中的浮点数
func (l *AdminAuditWithdrawalLogic) parseFloat(s string) (float64, error) {
	var result float64
	_, err := fmt.Sscanf(s, "%f", &result)
	return result, err
}

func (l *AdminAuditWithdrawalLogic) AdminAuditWithdrawal(req *types.AdminAuditWithdrawalReq) (resp *types.AdminAuditWithdrawalResp, err error) {
	// 1. 查询提现记录
	withdrawal, err := l.svcCtx.AgentWithdrawalModel.FindOne(l.ctx, req.WithdrawalId)
	if err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DB_ERROR), "查询提现记录失败, %v", err)
	}

	// 3. 检查状态（必须是待审核状态）
	if withdrawal.Status != 1 {
		return nil, errors.Wrapf(xerr.NewErrMsg("该提现记录已处理"), "")
	}

	// 4. 使用事务处理审核
	err = l.svcCtx.AgentWithdrawalModel.Trans(l.ctx, func(transCtx context.Context, session sqlx.Session) error {
		switch req.Status {
		case 2: // 审核通过
			// 4.1 根据提现方式处理
			switch withdrawal.WithdrawalType {
			case 1:
				// 支付宝提现：审核通过前再次校验月度额度，避免一次性通过多笔超限
				now := time.Now()
				monthStart := time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, now.Location())
				nextMonthStart := monthStart.AddDate(0, 1, 0)

				// 获取支付宝月度额度配置（默认 800 元）
				alipayQuota := 800.0
				if cfg, cfgErr := l.svcCtx.AgentConfigModel.FindOneByConfigKey(transCtx, "alipay_month_quota"); cfgErr == nil {
					if parsed, parseErr := l.parseFloat(cfg.ConfigValue); parseErr == nil && parsed > 0 {
						alipayQuota = parsed
					}
				}

				// 统计本月已成功的支付宝提现金额（status=5）
				withdrawBuilder := l.svcCtx.AgentWithdrawalModel.SelectBuilder().
					Where("agent_id = ? AND withdrawal_type = ? AND status = ? AND create_time >= ? AND create_time < ?",
						withdrawal.AgentId, 1, 5, monthStart, nextMonthStart)
				usedAmount, sumErr := l.svcCtx.AgentWithdrawalModel.FindSum(transCtx, withdrawBuilder, "amount")
				if sumErr != nil {
					return errors.Wrapf(sumErr, "查询本月支付宝提现额度使用情况失败")
				}

				if usedAmount+withdrawal.Amount > alipayQuota {
					// 超出额度，不允许通过，保持待审核状态并提示原因
					withdrawal.Status = 1
					withdrawal.Remark = sql.NullString{
						String: fmt.Sprintf("超过本月支付宝提现额度（限额：%.2f 元，已用：%.2f 元），请使用银行卡提现或调整金额", alipayQuota, usedAmount),
						Valid:  true,
					}
					if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
						return errors.Wrapf(err, "更新提现记录失败")
					}
					return errors.Wrapf(xerr.NewErrMsg("超过本月支付宝提现额度，无法通过该笔提现"), "")
				}

				// 支付宝提现：开发环境下做模拟，不调用真实支付宝转账
				mockTransferStatus := "SUCCESS"
				var transferResp struct {
					Status  string
					SubCode string
				}

				if os.Getenv("ENV") == "development" {
					transferResp.Status = mockTransferStatus
					logx.Infof("【DEV】模拟支付宝转账成功，withdrawNo=%s, amount=%.2f, payee=%s",
						withdrawal.WithdrawNo, withdrawal.ActualAmount, withdrawal.PayeeAccount)
				} else {
					// 生产环境：同步调用支付宝转账接口
					outBizNo := withdrawal.WithdrawNo
					resp, err := l.svcCtx.AlipayService.AliTransfer(transCtx, withdrawal.PayeeAccount, withdrawal.PayeeName, withdrawal.ActualAmount, "代理提现", outBizNo)
					if err != nil {
						// 调用失败：保持状态为待审核（1），只记录备注，方便管理员重试
						withdrawal.Status = 1 // 待审核
						withdrawal.Remark = sql.NullString{String: fmt.Sprintf("支付宝转账调用失败: %v", err), Valid: true}
						_ = l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal)

						return errors.Wrapf(err, "支付宝转账失败")
					}
					transferResp.Status = resp.Status
					transferResp.SubCode = resp.SubCode
				}

				// 4.2 根据转账结果更新状态
				switch transferResp.Status {
				case "SUCCESS":
					// 转账成功
					withdrawal.Status = 5 // 提现成功
					if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
						return errors.Wrapf(err, "更新提现记录失败")
					}

					// 更新钱包（解冻并扣除）
					wallet, err := l.svcCtx.AgentWalletModel.FindOneByAgentId(transCtx, withdrawal.AgentId)
					if err != nil {
						return errors.Wrapf(err, "查询钱包失败")
					}
					wallet.FrozenBalance -= withdrawal.Amount
					wallet.WithdrawnAmount += withdrawal.Amount
					if err := l.svcCtx.AgentWalletModel.UpdateWithVersion(transCtx, session, wallet); err != nil {
						return errors.Wrapf(err, "更新钱包失败")
					}

					// 更新扣税记录状态
					taxBuilder := l.svcCtx.AgentWithdrawalTaxModel.SelectBuilder().
						Where("withdrawal_id = ?", withdrawal.Id)
					taxRecords, err := l.svcCtx.AgentWithdrawalTaxModel.FindAll(transCtx, taxBuilder, "")
					if err == nil && len(taxRecords) > 0 {
						taxRecord := taxRecords[0]
						taxRecord.TaxStatus = 2 // 已扣税
						taxRecord.TaxTime = lzUtils.TimeToNullTime(time.Now())
						l.svcCtx.AgentWithdrawalTaxModel.UpdateWithVersion(transCtx, session, taxRecord)
					}

				case "FAIL":
					// 转账失败：保持待审核状态，方便人工处理或重试
					withdrawal.Status = 1 // 待审核
					errorMsg := l.mapAlipayError(transferResp.SubCode)
					withdrawal.Remark = sql.NullString{String: errorMsg, Valid: true}
					if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
						return errors.Wrapf(err, "更新提现记录失败")
					}

				case "DEALING":
					// 处理中：同样保持待审核状态（1），由管理员后续确认
					withdrawal.Status = 1
					withdrawal.Remark = sql.NullString{String: "支付宝处理中，请稍后重试或联系平台", Valid: true}
					if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
						return errors.Wrapf(err, "更新提现记录失败")
					}
				}

			case 2:
				// 银行卡提现：审核通过即视为提现成功（线下已/将立即打款）
				withdrawal.Status = 5 // 提现成功
				withdrawal.Remark = sql.NullString{String: req.Remark, Valid: true}
				if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
					return errors.Wrapf(err, "更新提现记录失败")
				}

				// 更新钱包（解冻并扣除）
				wallet, err := l.svcCtx.AgentWalletModel.FindOneByAgentId(transCtx, withdrawal.AgentId)
				if err != nil {
					return errors.Wrapf(err, "查询钱包失败")
				}
				wallet.FrozenBalance -= withdrawal.Amount
				wallet.WithdrawnAmount += withdrawal.Amount
				if err := l.svcCtx.AgentWalletModel.UpdateWithVersion(transCtx, session, wallet); err != nil {
					return errors.Wrapf(err, "更新钱包失败")
				}

				// 更新扣税记录状态
				taxBuilder := l.svcCtx.AgentWithdrawalTaxModel.SelectBuilder().
					Where("withdrawal_id = ?", withdrawal.Id)
				taxRecords, err := l.svcCtx.AgentWithdrawalTaxModel.FindAll(transCtx, taxBuilder, "")
				if err == nil && len(taxRecords) > 0 {
					taxRecord := taxRecords[0]
					taxRecord.TaxStatus = 2 // 已扣税
					taxRecord.TaxTime = lzUtils.TimeToNullTime(time.Now())
					l.svcCtx.AgentWithdrawalTaxModel.UpdateWithVersion(transCtx, session, taxRecord)
				}
			}

		case 3: // 审核拒绝
			// 4.1 更新提现记录状态为拒绝
			withdrawal.Status = 3 // 审核拒绝
			withdrawal.Remark = sql.NullString{String: req.Remark, Valid: true}
			if err := l.svcCtx.AgentWithdrawalModel.UpdateWithVersion(transCtx, session, withdrawal); err != nil {
				return errors.Wrapf(err, "更新提现记录失败")
			}

			// 4.2 解冻余额
			wallet, err := l.svcCtx.AgentWalletModel.FindOneByAgentId(transCtx, withdrawal.AgentId)
			if err != nil {
				return errors.Wrapf(err, "查询钱包失败")
			}
			wallet.FrozenBalance -= withdrawal.Amount
			wallet.Balance += withdrawal.Amount
			if err := l.svcCtx.AgentWalletModel.UpdateWithVersion(transCtx, session, wallet); err != nil {
				return errors.Wrapf(err, "更新钱包失败")
			}
		}

		return nil
	})

	if err != nil {
		return nil, err
	}

	return &types.AdminAuditWithdrawalResp{
		Success: true,
	}, nil
}

// mapAlipayError 映射支付宝错误码
func (l *AdminAuditWithdrawalLogic) mapAlipayError(code string) string {
	errorMapping := map[string]string{
		"PAYEE_USERINFO_ERROR":     "收款方姓名或信息不匹配",
		"PAYEE_CARD_INFO_ERROR":    "收款支付宝账号及户名不一致",
		"PAYEE_IDENTITY_NOT_MATCH": "收款方身份信息不匹配",
		"PAYEE_USER_IS_INST":       "收款方为金融机构，不能使用提现功能",
		"PAYEE_USER_TYPE_ERROR":    "该支付宝账号类型不支持提现",
	}
	if msg, ok := errorMapping[code]; ok {
		return msg
	}
	return "系统错误，请联系客服"
}