package k2v_test

import (
	k2v "code.notaphish.fyi/milas/garage-k2v-go"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"net/http/httptrace"
	"strconv"
	"testing"
	"time"
)

func TestClient_PollRange(t *testing.T) {
	t.Parallel()

	f, ctx := newFixture(t)

	pk := randomPk()
	sk := randomSk()

	for i := range 5 {
		err := f.cli.InsertItem(ctx, f.bucket, pk, sk+"-"+strconv.Itoa(i), "", []byte("hello1"))
		require.NoError(t, err)
	}

	// first read should complete immediately
	q := k2v.PollRangeQuery{
		Start: sk,
	}
	result, err := f.cli.PollRange(ctx, f.bucket, pk, q, 5*time.Second)
	require.NoError(t, err)
	require.NotEmpty(t, result.SeenMarker)
	require.Len(t, result.Items, 5)
	for i := range result.Items {
		require.Len(t, result.Items[i].Values, 1)
		require.Equal(t, "hello1", string(result.Items[i].Values[0]))
	}

	updateErrCh := make(chan error, 1)
	pollReadyCh := make(chan struct{})
	go func(sk string, ct k2v.CausalityToken) {
		defer close(updateErrCh)
		select {
		case <-ctx.Done():
			t.Errorf("Context canceled: %v", ctx.Err())
			return
		case <-pollReadyCh:
			t.Logf("PollRange connected")
		}
		updateErrCh <- f.cli.InsertItem(ctx, f.bucket, pk, sk, ct, []byte("hello2"))
	}(result.Items[3].SortKey, k2v.CausalityToken(result.Items[3].CausalityToken))

	trace := &httptrace.ClientTrace{
		WroteRequest: func(_ httptrace.WroteRequestInfo) {
			pollReadyCh <- struct{}{}
		},
	}

	q.SeenMarker = result.SeenMarker
	result, err = f.cli.PollRange(httptrace.WithClientTrace(ctx, trace), f.bucket, pk, q, 5*time.Second)
	if assert.NoError(t, err) {
		require.NotEmpty(t, result.SeenMarker)
		require.Len(t, result.Items, 1)
		require.Len(t, result.Items[0].Values, 1)
		require.Equal(t, sk+"-3", result.Items[0].SortKey)
		require.Equal(t, "hello2", string(result.Items[0].Values[0]))
	}
	require.NoError(t, <-updateErrCh)

	require.NoError(t, err)
	require.NoError(t, f.cli.InsertItem(ctx, f.bucket, pk, result.Items[0].SortKey, k2v.CausalityToken(result.Items[0].CausalityToken), []byte("hello3")))

	q.SeenMarker = result.SeenMarker
	result, err = f.cli.PollRange(ctx, f.bucket, pk, q, 5*time.Second)
	if assert.NoError(t, err) {
		require.NotEmpty(t, result.SeenMarker)
		require.Len(t, result.Items, 1)
		require.Len(t, result.Items[0].Values, 1)
		require.Equal(t, sk+"-3", result.Items[0].SortKey)
		require.Equal(t, "hello3", string(result.Items[0].Values[0]))
	}
}

func TestClient_PollRange_Timeout(t *testing.T) {
	if testing.Short() {
		t.Skip("Skipping in short mode: 1 sec minimum to trigger timeout")
		return
	}
	t.Parallel()

	f, ctx := newFixture(t)

	pk := randomPk()
	sk := randomSk()

	for i := range 5 {
		err := f.cli.InsertItem(ctx, f.bucket, pk, sk+"-"+strconv.Itoa(i), "", []byte("hello1"))
		require.NoError(t, err)
	}

	// first read should complete immediately
	q := k2v.PollRangeQuery{
		Start: sk,
	}
	result, err := f.cli.PollRange(ctx, f.bucket, pk, q, 5*time.Second)
	require.NoError(t, err)
	require.NotEmpty(t, result.SeenMarker)
	require.Len(t, result.Items, 5)
	for i := range result.Items {
		require.Len(t, result.Items[i].Values, 1)
		require.Equal(t, "hello1", string(result.Items[i].Values[0]))
	}

	q.SeenMarker = result.SeenMarker
	result, err = f.cli.PollRange(ctx, f.bucket, pk, q, 1*time.Second)
	require.ErrorIs(t, err, k2v.NotModifiedTimeoutErr)
}