// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package storage

import (
	"net/http"
	"net/http/httptest"
	"testing"

	"gitea.dev/modules/setting"
	"gitea.dev/modules/test"
	"gitea.dev/modules/util"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func prepareMinioStorageConfig(t *testing.T, basePath ...string) *setting.Storage {
	return &setting.Storage{
		MinioConfig: setting.MinioStorageConfig{
			Endpoint:        test.ExternalServiceHTTP(t, "TEST_MINIO_ENDPOINT", "minio:9000"),
			AccessKeyID:     "123456",
			SecretAccessKey: "12345678",
			Bucket:          "gitea",
			Location:        "us-east-1",
			BasePath:        util.OptionalArg(basePath),
		},
	}
}

func TestMinioStorage(t *testing.T) {
	t.Run("NoBasePath", func(t *testing.T) {
		config := prepareMinioStorageConfig(t)
		objStore, err := NewStorage(setting.MinioStorageType, config)
		require.NoError(t, err)
		testStorageGeneral(t, objStore)
	})
	t.Run("WithBasePath", func(t *testing.T) {
		config := prepareMinioStorageConfig(t, "test-base-path")
		objStore, err := NewStorage(setting.MinioStorageType, config)
		require.NoError(t, err)
		testStorageGeneral(t, objStore)
	})
}

func TestS3StorageBadRequest(t *testing.T) {
	cfg := prepareMinioStorageConfig(t)
	cfg.MinioConfig.SecretAccessKey = "invalid-secret"
	_, err := NewStorage(setting.MinioStorageType, cfg)
	assert.ErrorContains(t, err, "ObjectStorage.BucketExists: endpoint="+cfg.MinioConfig.Endpoint)
}

func TestMinioCredentials(t *testing.T) {
	const (
		ExpectedAccessKey       = "ExampleAccessKeyID"
		ExpectedSecretAccessKey = "ExampleSecretAccessKeyID"
		// Use a FakeEndpoint for IAM credentials to avoid logging any
		// potential real IAM credentials when running in EC2.
		FakeEndpoint = "http://localhost"
	)

	t.Run("Static Credentials", func(t *testing.T) {
		cfg := setting.MinioStorageConfig{
			AccessKeyID:     ExpectedAccessKey,
			SecretAccessKey: ExpectedSecretAccessKey,
			IamEndpoint:     FakeEndpoint,
		}
		creds := buildMinioCredentials(cfg)
		v, err := creds.Get()

		assert.NoError(t, err)
		assert.Equal(t, ExpectedAccessKey, v.AccessKeyID)
		assert.Equal(t, ExpectedSecretAccessKey, v.SecretAccessKey)
	})

	t.Run("Chain", func(t *testing.T) {
		cfg := setting.MinioStorageConfig{
			IamEndpoint: FakeEndpoint,
		}

		t.Run("EnvMinio", func(t *testing.T) {
			t.Setenv("MINIO_ACCESS_KEY", ExpectedAccessKey+"Minio")
			t.Setenv("MINIO_SECRET_KEY", ExpectedSecretAccessKey+"Minio")

			creds := buildMinioCredentials(cfg)
			v, err := creds.Get()

			assert.NoError(t, err)
			assert.Equal(t, ExpectedAccessKey+"Minio", v.AccessKeyID)
			assert.Equal(t, ExpectedSecretAccessKey+"Minio", v.SecretAccessKey)
		})

		t.Run("EnvAWS", func(t *testing.T) {
			t.Setenv("AWS_ACCESS_KEY", ExpectedAccessKey+"AWS")
			t.Setenv("AWS_SECRET_KEY", ExpectedSecretAccessKey+"AWS")

			creds := buildMinioCredentials(cfg)
			v, err := creds.Get()

			assert.NoError(t, err)
			assert.Equal(t, ExpectedAccessKey+"AWS", v.AccessKeyID)
			assert.Equal(t, ExpectedSecretAccessKey+"AWS", v.SecretAccessKey)
		})

		t.Run("FileMinio", func(t *testing.T) {
			// prevent loading any actual credentials files from the user
			t.Setenv("MINIO_SHARED_CREDENTIALS_FILE", "testdata/minio.json")
			t.Setenv("AWS_SHARED_CREDENTIALS_FILE", "testdata/fake")

			creds := buildMinioCredentials(cfg)
			v, err := creds.Get()

			assert.NoError(t, err)
			assert.Equal(t, ExpectedAccessKey+"MinioFile", v.AccessKeyID)
			assert.Equal(t, ExpectedSecretAccessKey+"MinioFile", v.SecretAccessKey)
		})

		t.Run("FileAWS", func(t *testing.T) {
			// prevent loading any actual credentials files from the user
			t.Setenv("MINIO_SHARED_CREDENTIALS_FILE", "testdata/fake.json")
			t.Setenv("AWS_SHARED_CREDENTIALS_FILE", "testdata/aws_credentials")

			creds := buildMinioCredentials(cfg)
			v, err := creds.Get()

			assert.NoError(t, err)
			assert.Equal(t, ExpectedAccessKey+"AWSFile", v.AccessKeyID)
			assert.Equal(t, ExpectedSecretAccessKey+"AWSFile", v.SecretAccessKey)
		})

		t.Run("IAM", func(t *testing.T) {
			// prevent loading any actual credentials files from the user
			t.Setenv("MINIO_SHARED_CREDENTIALS_FILE", "testdata/fake.json")
			t.Setenv("AWS_SHARED_CREDENTIALS_FILE", "testdata/fake")

			// Spawn a server to emulate the EC2 Instance Metadata
			server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
				// The client will actually make 3 requests here,
				// first will be to get the IMDSv2 token, second to
				// get the role, and third for the actual
				// credentials. However, we can return credentials
				// every request since we're not emulating a full
				// IMDSv2 flow.
				w.Write([]byte(`{"Code":"Success","AccessKeyId":"ExampleAccessKeyIDIAM","SecretAccessKey":"ExampleSecretAccessKeyIDIAM"}`))
			}))
			defer server.Close()

			// Use the provided EC2 Instance Metadata server
			creds := buildMinioCredentials(setting.MinioStorageConfig{
				IamEndpoint: server.URL,
			})
			v, err := creds.Get()

			assert.NoError(t, err)
			assert.Equal(t, ExpectedAccessKey+"IAM", v.AccessKeyID)
			assert.Equal(t, ExpectedSecretAccessKey+"IAM", v.SecretAccessKey)
		})
	})
}