package redisstate_test

import (
	"context"
	"testing"

	"galaxy/lobby/internal/adapters/redisstate"

	"github.com/alicebob/miniredis/v2"
	"github.com/redis/go-redis/v9"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func newOffsetStore(t *testing.T) (*redisstate.StreamOffsetStore, *miniredis.Miniredis) {
	t.Helper()
	server := miniredis.RunT(t)
	client := redis.NewClient(&redis.Options{Addr: server.Addr()})
	t.Cleanup(func() { _ = client.Close() })

	store, err := redisstate.NewStreamOffsetStore(client)
	require.NoError(t, err)
	return store, server
}

func TestStreamOffsetStoreLoadMissing(t *testing.T) {
	store, _ := newOffsetStore(t)
	id, found, err := store.Load(context.Background(), "runtime_results")
	require.NoError(t, err)
	assert.False(t, found)
	assert.Empty(t, id)
}

func TestStreamOffsetStoreSaveLoadRoundTrip(t *testing.T) {
	store, _ := newOffsetStore(t)

	require.NoError(t, store.Save(context.Background(), "runtime_results", "1700000000000-0"))

	id, found, err := store.Load(context.Background(), "runtime_results")
	require.NoError(t, err)
	assert.True(t, found)
	assert.Equal(t, "1700000000000-0", id)
}

func TestStreamOffsetStoreOverwrite(t *testing.T) {
	store, _ := newOffsetStore(t)

	require.NoError(t, store.Save(context.Background(), "runtime_results", "100-0"))
	require.NoError(t, store.Save(context.Background(), "runtime_results", "200-0"))

	id, found, err := store.Load(context.Background(), "runtime_results")
	require.NoError(t, err)
	assert.True(t, found)
	assert.Equal(t, "200-0", id)
}

func TestStreamOffsetStoreRejectsInvalidArgs(t *testing.T) {
	store, _ := newOffsetStore(t)

	require.Error(t, store.Save(context.Background(), "", "100-0"))
	require.Error(t, store.Save(context.Background(), "runtime_results", ""))

	_, _, err := store.Load(context.Background(), "")
	require.Error(t, err)
}