package dpsv1

import (
	"errors"
	"git.sxidc.com/service-supports/dps-sdk/client"
	"git.sxidc.com/service-supports/dps-sdk/pb/v1"
	"git.sxidc.com/service-supports/dps-sdk/pb/v1/request"
)

type Transaction struct {
	stream v1.CommandService_TransactionClient
	client *Client
}

func (tx *Transaction) InsertTx(req *client.InsertRequest) (string, error) {
	if req.TableRow == nil {
		return "", nil
	}

	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	var err error

	defer func() {
		if err != nil {
			innerErr := tx.stream.CloseSend()
			if innerErr != nil {
				panic(innerErr)
			}
		}
	}()

	reqTableRow, err := req.TableRow.ToDPSTableRow()
	if err != nil {
		return "", err
	}

	err = tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_InsertTxRequest{
			InsertTxRequest: &request.InsertTxRequest{
				TablePrefixWithSchema: req.TablePrefixWithSchema,
				Version:               req.Version,
				KeyColumns:            req.KeyColumns,
				TableRow:              reqTableRow,
				UserID:                req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}

func (tx *Transaction) InsertBatchTx(req *client.InsertBatchRequest) (string, error) {
	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	tableRowItems := make([]*request.InsertTableRowItem, 0)

	for _, reqTableItem := range req.Items {
		tableRows := make([]*request.TableRow, 0)
		for _, reqTableRow := range reqTableItem.TableRows {
			if reqTableRow == nil {
				continue
			}

			tableRow, err := reqTableRow.ToDPSTableRow()
			if err != nil {
				return "", err
			}

			tableRows = append(tableRows, tableRow)
		}

		tableRowItems = append(tableRowItems, &request.InsertTableRowItem{
			TablePrefixWithSchema: reqTableItem.TablePrefixWithSchema,
			Version:               reqTableItem.Version,
			KeyColumns:            reqTableItem.KeyColumns,
			TableRows:             tableRows,
		})
	}

	err := tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_InsertBatchTxRequest{
			InsertBatchTxRequest: &request.InsertBatchTxRequest{
				Items:  tableRowItems,
				UserID: req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}

func (tx *Transaction) DeleteTx(req *client.DeleteRequest) (string, error) {
	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	err := tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_DeleteTxRequest{
			DeleteTxRequest: &request.DeleteTxRequest{
				TablePrefixWithSchema: req.TablePrefixWithSchema,
				Version:               req.Version,
				KeyColumns:            req.KeyValues.Columns(),
				KeyValues:             req.KeyValues.Values(),
				UserID:                req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}

func (tx *Transaction) DeleteWhereTx(req *client.DeleteWhereRequest) (string, error) {
	if req.Where == nil {
		return "", errors.New("没有传递Where条件")
	}

	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	whereJsonBytes, err := req.Where.ToJson()
	if err != nil {
		return "", err
	}

	err = tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_DeleteWhereTxRequest{
			DeleteWhereTxRequest: &request.DeleteWhereTxRequest{
				TablePrefixWithSchema: req.TablePrefixWithSchema,
				Version:               req.Version,
				KeyColumns:            req.KeyColumns,
				Where:                 whereJsonBytes,
				UserID:                req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}

func (tx *Transaction) UpdateTx(req *client.UpdateRequest) (string, error) {
	if req.NewTableRow == nil {
		return "", nil
	}

	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	reqNewTableRow, err := req.NewTableRow.ToDPSTableRow()
	if err != nil {
		return "", err
	}

	err = tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_UpdateTxRequest{
			UpdateTxRequest: &request.UpdateTxRequest{
				TablePrefixWithSchema: req.TablePrefixWithSchema,
				Version:               req.Version,
				KeyColumns:            req.KeyValues.Columns(),
				KeyValues:             req.KeyValues.Values(),
				NewTableRow:           reqNewTableRow,
				UserID:                req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}

func (tx *Transaction) UpdateWhereTx(req *client.UpdateWhereRequest) (string, error) {
	if req.Where == nil {
		return "", errors.New("没有传递Where条件")
	}

	if req.NewTableRow == nil {
		return "", nil
	}

	tx.client.transactionMutex.Lock()
	defer tx.client.transactionMutex.Unlock()

	if tx.client.conn == nil {
		return "", nil
	}

	whereJsonBytes, err := req.Where.ToJson()
	if err != nil {
		return "", err
	}

	reqNewTableRow, err := req.NewTableRow.ToDPSTableRow()
	if err != nil {
		return "", err
	}

	err = tx.stream.Send(&request.TransactionOperation{
		Request: &request.TransactionOperation_UpdateWhereTxRequest{
			UpdateWhereTxRequest: &request.UpdateWhereTxRequest{
				TablePrefixWithSchema: req.TablePrefixWithSchema,
				Version:               req.Version,
				KeyColumns:            req.KeyColumns,
				Where:                 whereJsonBytes,
				NewTableRow:           reqNewTableRow,
				UserID:                req.UserID,
			},
		}})
	if err != nil {
		return "", err
	}

	txResponse, err := tx.stream.Recv()
	if err != nil {
		return "", err
	}

	return txResponse.Statement, nil
}