package volume_server_grpc_test

import (
	"context"
	"io"
	"strings"
	"testing"
	"time"

	"github.com/seaweedfs/seaweedfs/test/volume_server/framework"
	"github.com/seaweedfs/seaweedfs/test/volume_server/matrix"
	"github.com/seaweedfs/seaweedfs/weed/pb/volume_server_pb"
)

func TestScrubVolumeIndexAndUnsupportedMode(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(61)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	indexResp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds: []uint32{volumeID},
		Mode:      volume_server_pb.VolumeScrubMode_INDEX,
	})
	if err != nil {
		t.Fatalf("ScrubVolume index mode failed: %v", err)
	}
	if indexResp.GetTotalVolumes() != 1 {
		t.Fatalf("ScrubVolume expected total_volumes=1, got %d", indexResp.GetTotalVolumes())
	}

	_, err = grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds: []uint32{volumeID},
		Mode:      volume_server_pb.VolumeScrubMode(99),
	})
	if err == nil {
		t.Fatalf("ScrubVolume should fail for unsupported mode")
	}
	if !strings.Contains(err.Error(), "unsupported volume scrub mode") {
		t.Fatalf("ScrubVolume unsupported mode error mismatch: %v", err)
	}
}

func TestScrubEcVolumeMissingVolume(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	_, err := grpcClient.ScrubEcVolume(ctx, &volume_server_pb.ScrubEcVolumeRequest{
		VolumeIds: []uint32{98765},
		Mode:      volume_server_pb.VolumeScrubMode_INDEX,
	})
	if err == nil {
		t.Fatalf("ScrubEcVolume should fail for missing EC volume")
	}
	if !strings.Contains(err.Error(), "EC volume id") {
		t.Fatalf("ScrubEcVolume missing-volume error mismatch: %v", err)
	}
}

func TestScrubEcVolumeAutoSelectNoEcVolumes(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	resp, err := grpcClient.ScrubEcVolume(ctx, &volume_server_pb.ScrubEcVolumeRequest{
		Mode: volume_server_pb.VolumeScrubMode_INDEX,
	})
	if err != nil {
		t.Fatalf("ScrubEcVolume auto-select failed: %v", err)
	}
	if resp.GetTotalVolumes() != 0 {
		t.Fatalf("ScrubEcVolume auto-select expected total_volumes=0 without EC data, got %d", resp.GetTotalVolumes())
	}
	if len(resp.GetBrokenVolumeIds()) != 0 {
		t.Fatalf("ScrubEcVolume auto-select expected no broken volumes, got %v", resp.GetBrokenVolumeIds())
	}
}

func TestQueryInvalidAndMissingFileIDPaths(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	invalidStream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{"bad-fid"},
		Selections:  []string{"name"},
		Filter:      &volume_server_pb.QueryRequest_Filter{},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			JsonInput: &volume_server_pb.QueryRequest_InputSerialization_JSONInput{},
		},
	})
	if err == nil {
		_, err = invalidStream.Recv()
	}
	if err == nil {
		t.Fatalf("Query should fail for invalid file id")
	}

	missingFid := framework.NewFileID(98766, 1, 1)
	missingStream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{missingFid},
		Selections:  []string{"name"},
		Filter:      &volume_server_pb.QueryRequest_Filter{},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			JsonInput: &volume_server_pb.QueryRequest_InputSerialization_JSONInput{},
		},
	})
	if err == nil {
		_, err = missingStream.Recv()
	}
	if err == nil {
		t.Fatalf("Query should fail for missing file id volume")
	}
}

func TestScrubVolumeAutoSelectAndAllModes(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeIDA = uint32(62)
	const volumeIDB = uint32(63)
	framework.AllocateVolume(t, grpcClient, volumeIDA, "")
	framework.AllocateVolume(t, grpcClient, volumeIDB, "")

	// upload some data so index files are not zero-sized
	httpClient := framework.NewHTTPClient()
	framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), framework.NewFileID(volumeIDA, 1, 1), []byte("test data A"))
	framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), framework.NewFileID(volumeIDB, 2, 2), []byte("test data B"))

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	autoResp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		Mode: volume_server_pb.VolumeScrubMode_INDEX,
	})
	if err != nil {
		t.Fatalf("ScrubVolume auto-select failed: %v", err)
	}
	if autoResp.GetTotalVolumes() < 2 {
		t.Fatalf("ScrubVolume auto-select expected at least 2 volumes, got %d", autoResp.GetTotalVolumes())
	}

	localResp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds: []uint32{volumeIDA},
		Mode:      volume_server_pb.VolumeScrubMode_LOCAL,
	})
	if err != nil {
		t.Fatalf("ScrubVolume local mode failed: %v", err)
	}
	if localResp.GetTotalVolumes() != 1 {
		t.Fatalf("ScrubVolume local mode expected total_volumes=1, got %d", localResp.GetTotalVolumes())
	}
	if len(localResp.GetBrokenVolumeIds()) != 0 {
		t.Fatalf("ScrubVolume local mode expected no broken volumes, got %v: %v", localResp.GetBrokenVolumeIds(), localResp.GetDetails())
	}

	fullResp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds: []uint32{volumeIDA},
		Mode:      volume_server_pb.VolumeScrubMode_FULL,
	})
	if err != nil {
		t.Fatalf("ScrubVolume full mode failed: %v", err)
	}
	if fullResp.GetTotalVolumes() != 1 {
		t.Fatalf("ScrubVolume full mode expected total_volumes=1, got %d", fullResp.GetTotalVolumes())
	}
	if len(fullResp.GetBrokenVolumeIds()) != 0 {
		t.Fatalf("ScrubVolume full mode expected no broken volumes, got %v: %v", fullResp.GetBrokenVolumeIds(), fullResp.GetDetails())
	}
}

func TestQueryJsonSuccessAndCsvNoOutput(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(64)
	const needleID = uint64(777001)
	const cookie = uint32(0xAABBCCDD)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	jsonLines := []byte("{\"score\":3}\n{\"score\":12}\n{\"score\":18}\n")
	httpClient := framework.NewHTTPClient()
	fid := framework.NewFileID(volumeID, needleID, cookie)
	uploadResp := framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), fid, jsonLines)
	_ = framework.ReadAllAndClose(t, uploadResp)
	if uploadResp.StatusCode != 201 {
		t.Fatalf("upload expected 201, got %d", uploadResp.StatusCode)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	queryStream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{fid},
		Selections:  []string{"score"},
		Filter: &volume_server_pb.QueryRequest_Filter{
			Field:   "score",
			Operand: ">",
			Value:   "10",
		},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			JsonInput: &volume_server_pb.QueryRequest_InputSerialization_JSONInput{Type: "LINES"},
		},
	})
	if err != nil {
		t.Fatalf("Query json start failed: %v", err)
	}

	firstStripe, err := queryStream.Recv()
	if err != nil {
		t.Fatalf("Query json recv failed: %v", err)
	}
	records := string(firstStripe.GetRecords())
	if !strings.Contains(records, "score:12") || !strings.Contains(records, "score:18") {
		t.Fatalf("Query json records missing expected filtered scores: %q", records)
	}
	if strings.Contains(records, "score:3") {
		t.Fatalf("Query json records should not include filtered-out score: %q", records)
	}
	_, err = queryStream.Recv()
	if err != io.EOF {
		t.Fatalf("Query json expected EOF after first stripe, got: %v", err)
	}

	csvStream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{fid},
		Selections:  []string{"score"},
		Filter:      &volume_server_pb.QueryRequest_Filter{},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			CsvInput: &volume_server_pb.QueryRequest_InputSerialization_CSVInput{},
		},
	})
	if err != nil {
		t.Fatalf("Query csv start failed: %v", err)
	}
	_, err = csvStream.Recv()
	if err != io.EOF {
		t.Fatalf("Query csv expected EOF with no rows, got: %v", err)
	}
}

func TestQueryJsonNoMatchReturnsEmptyStripe(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(65)
	const needleID = uint64(777002)
	const cookie = uint32(0xABABCDCD)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	jsonLines := []byte("{\"score\":1}\n{\"score\":2}\n")
	httpClient := framework.NewHTTPClient()
	fid := framework.NewFileID(volumeID, needleID, cookie)
	uploadResp := framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), fid, jsonLines)
	_ = framework.ReadAllAndClose(t, uploadResp)
	if uploadResp.StatusCode != 201 {
		t.Fatalf("upload expected 201, got %d", uploadResp.StatusCode)
	}

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	queryStream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{fid},
		Selections:  []string{"score"},
		Filter: &volume_server_pb.QueryRequest_Filter{
			Field:   "score",
			Operand: ">",
			Value:   "100",
		},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			JsonInput: &volume_server_pb.QueryRequest_InputSerialization_JSONInput{Type: "LINES"},
		},
	})
	if err != nil {
		t.Fatalf("Query json no-match start failed: %v", err)
	}

	firstStripe, err := queryStream.Recv()
	if err != nil {
		t.Fatalf("Query json no-match recv failed: %v", err)
	}
	if len(firstStripe.GetRecords()) != 0 {
		t.Fatalf("Query json no-match expected empty records stripe, got: %q", string(firstStripe.GetRecords()))
	}

	_, err = queryStream.Recv()
	if err != io.EOF {
		t.Fatalf("Query json no-match expected EOF after first empty stripe, got: %v", err)
	}
}

func TestQueryCookieMismatchReturnsEOFNoResults(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(66)
	const needleID = uint64(777003)
	const cookie = uint32(0xCDCDABAB)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	jsonLines := []byte("{\"score\":7}\n{\"score\":8}\n")
	httpClient := framework.NewHTTPClient()
	fid := framework.NewFileID(volumeID, needleID, cookie)
	uploadResp := framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), fid, jsonLines)
	_ = framework.ReadAllAndClose(t, uploadResp)
	if uploadResp.StatusCode != 201 {
		t.Fatalf("upload expected 201, got %d", uploadResp.StatusCode)
	}

	wrongCookieFid := framework.NewFileID(volumeID, needleID, cookie+1)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	stream, err := grpcClient.Query(ctx, &volume_server_pb.QueryRequest{
		FromFileIds: []string{wrongCookieFid},
		Selections:  []string{"score"},
		Filter: &volume_server_pb.QueryRequest_Filter{
			Field:   "score",
			Operand: ">",
			Value:   "0",
		},
		InputSerialization: &volume_server_pb.QueryRequest_InputSerialization{
			JsonInput: &volume_server_pb.QueryRequest_InputSerialization_JSONInput{Type: "LINES"},
		},
	})
	if err != nil {
		t.Fatalf("Query start for cookie mismatch should not fail immediately, got: %v", err)
	}

	_, err = stream.Recv()
	if err != io.EOF {
		t.Fatalf("Query cookie mismatch expected EOF with no streamed records, got: %v", err)
	}
}

func TestScrubVolumeMarkBrokenReadonlyHealthyVolume(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartSingleVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(76)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	httpClient := framework.NewHTTPClient()
	framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), framework.NewFileID(volumeID, 1, 1), []byte("healthy data"))

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	resp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds:                 []uint32{volumeID},
		Mode:                      volume_server_pb.VolumeScrubMode_INDEX,
		MarkBrokenVolumesReadonly: true,
	})
	if err != nil {
		t.Fatalf("ScrubVolume with MarkBrokenVolumesReadonly on healthy volume failed: %v", err)
	}
	if len(resp.GetBrokenVolumeIds()) != 0 {
		t.Fatalf("expected no broken volumes, got %v", resp.GetBrokenVolumeIds())
	}

	statusResp, err := grpcClient.VolumeStatus(ctx, &volume_server_pb.VolumeStatusRequest{VolumeId: volumeID})
	if err != nil {
		t.Fatalf("VolumeStatus failed: %v", err)
	}
	if statusResp.GetIsReadOnly() {
		t.Fatalf("healthy volume should not be read-only after scrub with MarkBrokenVolumesReadonly")
	}
}

func TestScrubVolumeMarkBrokenReadonlyCorruptVolume(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartSingleVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(77)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	httpClient := framework.NewHTTPClient()
	framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), framework.NewFileID(volumeID, 1, 1), []byte("test data"))

	framework.CorruptIndexFile(t, clusterHarness.BaseDir(), volumeID)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	// scrub without the flag: broken volume reported but not marked read-only
	resp, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds: []uint32{volumeID},
		Mode:      volume_server_pb.VolumeScrubMode_INDEX,
	})
	if err != nil {
		t.Fatalf("ScrubVolume without flag failed: %v", err)
	}
	if len(resp.GetBrokenVolumeIds()) == 0 {
		t.Fatalf("expected broken volume after corruption")
	}

	statusResp, err := grpcClient.VolumeStatus(ctx, &volume_server_pb.VolumeStatusRequest{VolumeId: volumeID})
	if err != nil {
		t.Fatalf("VolumeStatus after scrub without flag failed: %v", err)
	}
	if statusResp.GetIsReadOnly() {
		t.Fatalf("volume should not be read-only when MarkBrokenVolumesReadonly is false")
	}

	// scrub with the flag: broken volume should now be marked read-only
	resp, err = grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds:                 []uint32{volumeID},
		Mode:                      volume_server_pb.VolumeScrubMode_INDEX,
		MarkBrokenVolumesReadonly: true,
	})
	if err != nil {
		t.Fatalf("ScrubVolume with MarkBrokenVolumesReadonly failed: %v", err)
	}
	if len(resp.GetBrokenVolumeIds()) == 0 {
		t.Fatalf("expected broken volume after corruption with flag")
	}

	found := false
	for _, d := range resp.GetDetails() {
		if strings.Contains(d, "is now read-only") {
			found = true
			break
		}
	}
	if !found {
		t.Fatalf("expected 'is now read-only' in details, got: %v", resp.GetDetails())
	}

	statusResp, err = grpcClient.VolumeStatus(ctx, &volume_server_pb.VolumeStatusRequest{VolumeId: volumeID})
	if err != nil {
		t.Fatalf("VolumeStatus after MarkBrokenVolumesReadonly scrub failed: %v", err)
	}
	if !statusResp.GetIsReadOnly() {
		t.Fatalf("broken volume should be read-only after MarkBrokenVolumesReadonly scrub")
	}
}

func TestScrubVolumeMarkBrokenReadonlyInMaintenanceMode(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	clusterHarness := framework.StartSingleVolumeCluster(t, matrix.P1())
	conn, grpcClient := framework.DialVolumeServer(t, clusterHarness.VolumeGRPCAddress())
	defer conn.Close()

	const volumeID = uint32(78)
	framework.AllocateVolume(t, grpcClient, volumeID, "")

	httpClient := framework.NewHTTPClient()
	framework.UploadBytes(t, httpClient, clusterHarness.VolumeAdminURL(), framework.NewFileID(volumeID, 1, 1), []byte("test data"))

	framework.CorruptIndexFile(t, clusterHarness.BaseDir(), volumeID)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	framework.EnableMaintenanceMode(t, ctx, grpcClient)

	// scrub with the flag in maintenance mode: makeVolumeReadonly should fail
	// and ScrubVolume should propagate the error
	_, err := grpcClient.ScrubVolume(ctx, &volume_server_pb.ScrubVolumeRequest{
		VolumeIds:                 []uint32{volumeID},
		Mode:                      volume_server_pb.VolumeScrubMode_INDEX,
		MarkBrokenVolumesReadonly: true,
	})
	if err == nil || !strings.Contains(err.Error(), "maintenance mode") {
		t.Fatalf("ScrubVolume with MarkBrokenVolumesReadonly in maintenance mode error mismatch: %v", err)
	}
}