// Copyright 2022 Molecula Corp. (DBA FeatureBase).
// SPDX-License-Identifier: Apache-2.0
package ctl

import (
	"context"
	"fmt"
	"io"
	"os"

	"github.com/featurebasedb/featurebase/v3/logger"
	"github.com/featurebasedb/featurebase/v3/rbf"
)

// RBFCheckCommand represents a command for running a consistency check on RBF.
type RBFCheckCommand struct {
	// Filepath to the RBF database.
	Path string

	// Standard input/output
	stdout  io.Writer
	logDest logger.Logger
}

// NewRBFCheckCommand returns a new instance of RBFCheckCommand.
func NewRBFCheckCommand(logdest logger.Logger) *RBFCheckCommand {
	return &RBFCheckCommand{
		stdout:  os.Stdout,
		logDest: logdest,
	}
}

// Run executes a consistency check of an RBF database.
func (cmd *RBFCheckCommand) Run(ctx context.Context) error {
	// Open database.
	db := rbf.NewDB(cmd.Path, nil)
	if err := db.Open(); err != nil {
		return err
	}
	defer db.Close()

	// Run check on the database.
	if err := db.Check(); err != nil {
		switch err := err.(type) {
		case rbf.ErrorList:
			for i := range err {
				fmt.Fprintln(cmd.stdout, err[i])
			}
		default:
			fmt.Fprintln(cmd.stdout, err)
		}
		return fmt.Errorf("check failed")
	}

	// If successful, print a success message.
	fmt.Fprintln(cmd.stdout, "ok")

	return nil
}