package user

import (
	"context"

	"github.com/perfect-panel/server/internal/model/log"
	"github.com/perfect-panel/server/internal/model/user"
	"github.com/perfect-panel/server/internal/svc"
	"github.com/perfect-panel/server/internal/types"
	"github.com/perfect-panel/server/pkg/constant"
	"github.com/perfect-panel/server/pkg/logger"
	"github.com/perfect-panel/server/pkg/xerr"
	"github.com/pkg/errors"
)

const (
	withdrawalLogBizTypeWithdrawal       = "withdrawal"
	withdrawalLogBizTypeCommissionRefund = "commission_refund"
)

type QueryWithdrawalLogLogic struct {
	logger.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

// NewQueryWithdrawalLogLogic Query Withdrawal Log
func NewQueryWithdrawalLogLogic(ctx context.Context, svcCtx *svc.ServiceContext) *QueryWithdrawalLogLogic {
	return &QueryWithdrawalLogLogic{
		Logger: logger.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *QueryWithdrawalLogLogic) QueryWithdrawalLog(req *types.QueryWithdrawalLogListRequest) (resp *types.QueryWithdrawalLogListResponse, err error) {
	u, ok := l.ctx.Value(constant.CtxKeyUser).(*user.User)
	if !ok {
		l.Error("current user is not found in context")
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.InvalidAccess), "Invalid Access")
	}

	page, size := normalizePagination(req.Page, req.Size)

	switch req.BizType {
	case "", withdrawalLogBizTypeWithdrawal:
		return l.queryWithdrawalLogs(u.Id, page, size)
	case withdrawalLogBizTypeCommissionRefund:
		return l.queryCommissionRefundLogs(u.Id, page, size)
	default:
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.InvalidParams), "invalid biz_type: %s", req.BizType)
	}
}

func (l *QueryWithdrawalLogLogic) queryWithdrawalLogs(userID int64, page, size int) (*types.QueryWithdrawalLogListResponse, error) {
	query := l.svcCtx.DB.WithContext(l.ctx).Model(&user.Withdrawal{}).Where("user_id = ?", userID)

	var total int64
	if err := query.Count(&total).Error; err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "count withdrawal logs failed: %v", err)
	}

	var rows []user.Withdrawal
	if err := query.Order("id DESC").Limit(size).Offset((page - 1) * size).Find(&rows).Error; err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "query withdrawal logs failed: %v", err)
	}

	list := make([]types.WithdrawalLog, 0, len(rows))
	for _, row := range rows {
		list = append(list, types.WithdrawalLog{
			Id:        row.Id,
			BizType:   withdrawalLogBizTypeWithdrawal,
			UserId:    row.UserId,
			Amount:    row.Amount,
			Content:   row.Content,
			Status:    row.Status,
			Reason:    row.Reason,
			Method:    row.Method,
			Account:   row.Account,
			QrCodeUrl: row.QrCodeUrl,
			CreatedAt: row.CreatedAt.Unix(),
			UpdatedAt: row.UpdatedAt.Unix(),
		})
	}

	summary, err := l.buildSummary(userID)
	if err != nil {
		return nil, err
	}

	return &types.QueryWithdrawalLogListResponse{
		List:    list,
		Total:   total,
		Summary: summary,
	}, nil
}

// buildSummary 聚合用户佣金账目快照,供前端展示闭环对账
//
//	commission_balance      = user.commission（当前余额,由 system_logs 累计而来）
//	locked_by_pending       = 待审批提现占用
//	available_to_withdraw   = balance - locked
//	total_historical_amount = 已通过提现累计（status=1）
//	total_refunded_amount   = 佣金回扣累计（type=333/337/338）
//	total_income_amount     = 佣金收入累计（type=331/332）
func (l *QueryWithdrawalLogLogic) buildSummary(userID int64) (*types.WithdrawalLogSummary, error) {
	db := l.svcCtx.DB.WithContext(l.ctx)
	var summary types.WithdrawalLogSummary

	if err := db.Model(&user.User{}).Where("id = ?", userID).
		Select("COALESCE(commission, 0)").Scan(&summary.CommissionBalance).Error; err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "load commission balance failed: %v", err)
	}

	if err := db.Model(&user.Withdrawal{}).
		Where("user_id = ? AND status = ?", userID, user.WithdrawalStatusPending).
		Select("COALESCE(SUM(amount), 0)").Scan(&summary.LockedByPending).Error; err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "sum pending withdrawals failed: %v", err)
	}

	if err := db.Model(&user.Withdrawal{}).
		Where("user_id = ? AND status = ?", userID, user.WithdrawalStatusApproved).
		Select("COALESCE(SUM(amount), 0)").Scan(&summary.TotalHistoricalAmount).Error; err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "sum approved withdrawals failed: %v", err)
	}

	row := db.Raw(`
		SELECT
			COALESCE(SUM(CASE WHEN CAST(JSON_EXTRACT(content,'$.type') AS UNSIGNED) IN (?,?)
				THEN CAST(JSON_EXTRACT(content,'$.amount') AS SIGNED) ELSE 0 END), 0) AS income,
			COALESCE(SUM(CASE WHEN CAST(JSON_EXTRACT(content,'$.type') AS UNSIGNED) IN (?,?,?)
				THEN CAST(JSON_EXTRACT(content,'$.amount') AS SIGNED) ELSE 0 END), 0) AS refund
		FROM system_logs
		WHERE type = ? AND object_id = ?`,
		log.CommissionTypePurchase, log.CommissionTypeRenewal,
		log.CommissionTypeRefund, log.CommissionTypeWithdrawReject, log.CommissionTypeWithdrawCancel,
		log.TypeCommission.Uint8(), userID,
	).Row()
	if err := row.Scan(&summary.TotalIncomeAmount, &summary.TotalRefundedAmount); err != nil {
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "aggregate commission logs failed: %v", err)
	}

	summary.AvailableToWithdraw = summary.CommissionBalance - summary.LockedByPending
	return &summary, nil
}

func (l *QueryWithdrawalLogLogic) queryCommissionRefundLogs(userID int64, page, size int) (*types.QueryWithdrawalLogListResponse, error) {
	queryLogic := NewQueryCommissionReturnLogLogic(l.ctx, l.svcCtx)
	rows, total, err := queryLogic.queryCommissionReturnLogRecordsByEventTypes(userID, page, size, log.CommissionTypeRefund)
	if err != nil {
		return nil, err
	}

	list := make([]types.WithdrawalLog, 0, len(rows))
	for _, row := range rows {
		list = append(list, types.WithdrawalLog{
			Id:        row.LogID,
			BizType:   withdrawalLogBizTypeCommissionRefund,
			UserId:    row.UserID,
			Amount:    row.Amount,
			Content:   row.Content,
			CreatedAt: row.CreatedAt,
			UpdatedAt: row.UpdatedAt,
		})
	}

	return &types.QueryWithdrawalLogListResponse{
		List:  list,
		Total: total,
	}, nil
}