package indexers

import (
	"context"
	"time"

	"github.com/gaze-network/indexer-network/core/types"
)

const (
	// pollingInterval is the default polling interval for the indexer polling worker
	pollingInterval = 15 * time.Second
)

type IndexerWorker interface {
	Type() string
	Run(ctx context.Context) error
	Shutdown() error
	ShutdownWithTimeout(timeout time.Duration) error
	ShutdownWithContext(ctx context.Context) error
}

type Processor[T any] interface {
	Name() string

	// Process processes the input data and indexes it.
	Process(ctx context.Context, inputs T) error

	// CurrentBlock returns the latest indexed block header.
	CurrentBlock(ctx context.Context) (types.BlockHeader, error)

	// GetIndexedBlock returns the indexed block header by the specified block height.
	GetIndexedBlock(ctx context.Context, height int64) (types.BlockHeader, error)

	// RevertData revert synced data to the specified block height for re-indexing.
	RevertData(ctx context.Context, from int64) error

	// VerifyStates verifies the states of the indexed data and the indexer
	// to ensure the last shutdown was graceful and no missing data.
	VerifyStates(ctx context.Context) error
}