package user

import (
	"context"
	"encoding/json"

	logmodel "github.com/perfect-panel/server/internal/model/log"
	ordermodel "github.com/perfect-panel/server/internal/model/order"
	"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/hash"
	"github.com/perfect-panel/server/pkg/logger"
	"github.com/perfect-panel/server/pkg/xerr"
	"github.com/pkg/errors"
)

const (
	inviteRecordRoleInviter = "inviter"
	inviteRecordRoleInvitee = "invitee"
)

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

type inviteRecordLog struct {
	Id        int64  `gorm:"column:id"`
	ObjectId  int64  `gorm:"column:object_id"`
	Content   string `gorm:"column:content"`
	CreatedAt int64  `gorm:"column:created_at"`
}

type inviteGiftContent struct {
	OrderNo string `json:"order_no"`
	Amount  int64  `json:"amount"`
}

type parsedInviteRecordLog struct {
	log     inviteRecordLog
	content inviteGiftContent
}

type inviteOrderUser struct {
	OrderNo string `gorm:"column:order_no"`
	UserId  int64  `gorm:"column:user_id"`
}

// Get invite gift records
func NewGetInviteRecordsLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetInviteRecordsLogic {
	return &GetInviteRecordsLogic{
		Logger: logger.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *GetInviteRecordsLogic) GetInviteRecords(req *types.GetInviteRecordsRequest) (resp *types.GetInviteRecordsResponse, err error) {
	u, ok := l.ctx.Value(constant.CtxKeyUser).(*user.User)
	if !ok {
		l.Errorw("[GetInviteRecords] user not found in context")
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.InvalidAccess), "Invalid Access")
	}

	normalizeInviteRecordsPagination(req)

	query := l.svcCtx.DB.WithContext(l.ctx).
		Table("system_logs").
		Where("type = ? AND object_id = ?", logmodel.TypeGift.Uint8(), u.Id).
		Where("JSON_VALID(content) = 1").
		Where("JSON_UNQUOTE(JSON_EXTRACT(content, '$.remark')) = ?", "邀请赠送")
	if req.StartTime > 0 {
		query = query.Where("created_at >= FROM_UNIXTIME(?)", req.StartTime)
	}
	if req.EndTime > 0 {
		query = query.Where("created_at <= FROM_UNIXTIME(?)", req.EndTime)
	}

	var total int64
	if err = query.Count(&total).Error; err != nil {
		l.Errorw("[GetInviteRecords] count logs failed",
			logger.Field("error", err.Error()),
			logger.Field("user_id", u.Id))
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "count logs failed: %v", err.Error())
	}

	var logs []inviteRecordLog
	if err = query.
		Select("id, object_id, content, CAST(UNIX_TIMESTAMP(created_at) * 1000 AS SIGNED) AS created_at").
		Order("created_at DESC, id DESC").
		Limit(req.Size).
		Offset((req.Page - 1) * req.Size).
		Scan(&logs).Error; err != nil {
		l.Errorw("[GetInviteRecords] query logs failed",
			logger.Field("error", err.Error()),
			logger.Field("user_id", u.Id))
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "query logs failed: %v", err.Error())
	}

	parsedLogs, orderNos := l.parseInviteRecordContents(logs)
	if len(logs) == 0 || len(parsedLogs) == 0 {
		return &types.GetInviteRecordsResponse{Total: total, List: []types.InviteRecord{}}, nil
	}

	orders, err := l.queryInviteRecordOrders(orderNos)
	if err != nil {
		l.Errorw("[GetInviteRecords] query orders failed",
			logger.Field("error", err.Error()),
			logger.Field("user_id", u.Id))
		return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "query orders failed: %v", err.Error())
	}

	list := make([]types.InviteRecord, 0, len(parsedLogs))
	for _, parsed := range parsedLogs {
		content := parsed.content
		logItem := parsed.log
		record := types.InviteRecord{
			Role:      inviteRecordRoleInviter,
			GiftDays:  content.Amount,
			OrderNo:   content.OrderNo,
			CreatedAt: logItem.CreatedAt,
		}

		if orderInfo, ok := orders[content.OrderNo]; ok {
			peerId := orderInfo.UserId
			if orderInfo.UserId == u.Id {
				record.Role = inviteRecordRoleInvitee
				peerId = u.RefererId
			}
			if peerId > 0 {
				record.PeerHash = hash.InvitePeerHash(peerId)
			}
		}

		list = append(list, record)
	}

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

func normalizeInviteRecordsPagination(req *types.GetInviteRecordsRequest) {
	if req.Page < 1 {
		req.Page = 1
	}
	if req.Size < 1 {
		req.Size = 10
	}
	if req.Size > 100 {
		req.Size = 100
	}
}

func (l *GetInviteRecordsLogic) parseInviteRecordContents(logs []inviteRecordLog) ([]parsedInviteRecordLog, []string) {
	parsedLogs := make([]parsedInviteRecordLog, 0, len(logs))
	orderNos := make([]string, 0, len(logs))
	for _, logItem := range logs {
		var content inviteGiftContent
		if err := json.Unmarshal([]byte(logItem.Content), &content); err != nil {
			l.Infow("[GetInviteRecords] parse content failed",
				logger.Field("error", err.Error()),
				logger.Field("log_id", logItem.Id))
			continue
		}
		parsedLogs = append(parsedLogs, parsedInviteRecordLog{log: logItem, content: content})
		if content.OrderNo != "" {
			orderNos = append(orderNos, content.OrderNo)
		}
	}
	return parsedLogs, orderNos
}

func (l *GetInviteRecordsLogic) queryInviteRecordOrders(orderNos []string) (map[string]inviteOrderUser, error) {
	orders := make(map[string]inviteOrderUser, len(orderNos))
	if len(orderNos) == 0 {
		return orders, nil
	}

	var orderData []inviteOrderUser
	err := l.svcCtx.DB.WithContext(l.ctx).
		Model(&ordermodel.Order{}).
		Select("order_no, user_id").
		Where("order_no IN ?", orderNos).
		Scan(&orderData).Error
	if err != nil {
		return nil, err
	}

	for _, item := range orderData {
		orders[item.OrderNo] = item
	}
	return orders, nil
}