package azureblob

import (
	"context"
	"os"
	"testing"

	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/bloberror"
	"github.com/stretchr/testify/require"
	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/modules/azure/azurite"
)

const (
	// azuriteImage is the default image used for running azurite in tests.
	azuriteImage       = "mcr.microsoft.com/azure-storage/azurite:latest"
	azuriteImageEnvVar = "TEST_AZURITE_IMAGE"
)

func newTestStore(t testing.TB) *Storage {
	t.Helper()

	img := azuriteImage
	if imgFromEnv := os.Getenv(azuriteImageEnvVar); imgFromEnv != "" {
		img = imgFromEnv
	}

	ctx := context.Background()

	c, err := azurite.Run(ctx, img)
	testcontainers.CleanupContainer(t, c)
	require.NoError(t, err)

	serviceURL, err := c.BlobServiceURL(ctx)
	require.NoError(t, err)

	return New(Config{
		Account:   azurite.AccountName,
		Container: "test",
		Endpoint:  serviceURL + "/" + azurite.AccountName,
		Credentials: Credentials{
			Account: azurite.AccountName,
			Key:     azurite.AccountKey,
		},
		Reset: true,
	})
}

func Test_AzureBlob_Get(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)

	result, err := testStore.Get(key)
	require.NoError(t, err)
	require.Equal(t, val, result)
}

func Test_AzureBlob_GetWithContext(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)

	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	result, err := testStore.GetWithContext(ctx, key)
	require.ErrorIs(t, err, context.Canceled)
	require.Zero(t, len(result))
}

func Test_AzureBlob_Set(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)
}

func Test_AzureBlob_SetWithContext(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	err := testStore.SetWithContext(ctx, key, val, 0)
	require.ErrorIs(t, err, context.Canceled)
}

func Test_AzureBlob_Delete(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)

	err = testStore.Delete(key)
	require.NoError(t, err)

	result, err := testStore.Get(key)
	if err != nil {
		if bloberror.HasCode(err, bloberror.BlobNotFound) {
			err = nil
		}
	}
	require.NoError(t, err)
	require.Zero(t, len(result))
}

func Test_AzureBlob_DeleteWithContext(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)

	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	err = testStore.DeleteWithContext(ctx, key)
	require.ErrorIs(t, err, context.Canceled)

	result, err := testStore.Get(key)
	require.NoError(t, err)
	require.Equal(t, val, result)
}

func Test_AzureBlob_Override(t *testing.T) {
	var (
		key = "john"
		val = []byte("doe")
	)

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set(key, val, 0)
	require.NoError(t, err)

	err = testStore.Set(key, val, 0)
	require.NoError(t, err)
}

func Test_AzureBlob_Get_NotExist(t *testing.T) {
	testStore := newTestStore(t)
	defer testStore.Close()

	result, err := testStore.Get("notexist")
	if err != nil {
		if bloberror.HasCode(err, bloberror.BlobNotFound) {
			err = nil
		}
	}
	require.NoError(t, err)
	require.Zero(t, len(result))
}

func Test_AzureBlob_Reset(t *testing.T) {
	val := []byte("doe")

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set("john1", val, 0)
	require.NoError(t, err)

	err = testStore.Set("john2", val, 0)
	require.NoError(t, err)

	err = testStore.Reset()
	require.NoError(t, err)

	result, err := testStore.Get("john1")
	if err != nil {
		if bloberror.HasCode(err, bloberror.BlobNotFound) {
			err = nil
		}
	}
	require.NoError(t, err)
	require.Zero(t, len(result))

	result, err = testStore.Get("john2")
	if err != nil {
		if bloberror.HasCode(err, bloberror.BlobNotFound) {
			err = nil
		}
	}
	require.NoError(t, err)
	require.Zero(t, len(result))
}

func Test_AzureBlob_Conn(t *testing.T) {
	testStore := newTestStore(t)
	defer testStore.Close()

	require.True(t, testStore.Conn() != nil)
}

func Test_AzureBlob_ResetWithContext(t *testing.T) {
	val := []byte("doe")

	testStore := newTestStore(t)
	defer testStore.Close()

	err := testStore.Set("john1", val, 0)
	require.NoError(t, err)

	err = testStore.Set("john2", val, 0)
	require.NoError(t, err)

	ctx, cancel := context.WithCancel(context.Background())
	cancel()

	err = testStore.ResetWithContext(ctx)
	require.ErrorIs(t, err, context.Canceled)

	result, err := testStore.Get("john1")
	require.NoError(t, err)
	require.Equal(t, val, result)

	result, err = testStore.Get("john2")
	require.NoError(t, err)
	require.Equal(t, val, result)
}

func Test_AzureBlob_Close(t *testing.T) {
	testStore := newTestStore(t)
	require.NoError(t, testStore.Close())
}

func Benchmark_AzureBlob_Set(b *testing.B) {
	testStore := newTestStore(b)
	defer testStore.Close()

	b.ReportAllocs()
	b.ResetTimer()

	var err error
	for i := 0; i < b.N; i++ {
		err = testStore.Set("john", []byte("doe"), 0)
	}

	require.NoError(b, err)
}

func Benchmark_AzureBlob_Get(b *testing.B) {
	testStore := newTestStore(b)
	defer testStore.Close()

	err := testStore.Set("john", []byte("doe"), 0)
	require.NoError(b, err)

	b.ReportAllocs()
	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		_, err = testStore.Get("john")
	}

	require.NoError(b, err)
}

func Benchmark_AzureBlob_SetAndDelete(b *testing.B) {
	testStore := newTestStore(b)
	defer testStore.Close()

	b.ReportAllocs()
	b.ResetTimer()

	var err error
	for i := 0; i < b.N; i++ {
		_ = testStore.Set("john", []byte("doe"), 0)
		err = testStore.Delete("john")
	}

	require.NoError(b, err)
}