/*
 * Minio Cloud Storage, (C) 2016 Minio, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package main

import (
	"bytes"
	"encoding/xml"
	"io/ioutil"
	"net/http"
	"testing"
)

// Tests validate bucket name.
func TestIsValidBucketName(t *testing.T) {
	testCases := []struct {
		bucketName string
		shouldPass bool
	}{
		// cases which should pass the test.
		// passing in valid bucket names.
		{"lol", true},
		{"1-this-is-valid", true},
		{"1-this-too-is-valid-1", true},
		{"this.works.too.1", true},
		{"1234567", true},
		{"123", true},
		{"s3-eu-west-1.amazonaws.com", true},
		{"ideas-are-more-powerful-than-guns", true},
		{"testbucket", true},
		{"1bucket", true},
		{"bucket1", true},
		// cases for which test should fail.
		// passing invalid bucket names.
		{"------", false},
		{"$this-is-not-valid-too", false},
		{"contains-$-dollar", false},
		{"contains-^-carrot", false},
		{"contains-$-dollar", false},
		{"contains-$-dollar", false},
		{"......", false},
		{"", false},
		{"a", false},
		{"ab", false},
		{".starts-with-a-dot", false},
		{"ends-with-a-dot.", false},
		{"ends-with-a-dash-", false},
		{"-starts-with-a-dash", false},
		{"THIS-BEINGS-WITH-UPPERCASe", false},
		{"tHIS-ENDS-WITH-UPPERCASE", false},
		{"ThisBeginsAndEndsWithUpperCase", false},
		{"una ñina", false},
		{"lalalallalallalalalallalallalala-theString-size-is-greater-than-64", false},
	}

	for i, testCase := range testCases {
		isValidBucketName := IsValidBucketName(testCase.bucketName)
		if testCase.shouldPass && !isValidBucketName {
			t.Errorf("Test case %d: Expected \"%s\" to be a valid bucket name", i+1, testCase.bucketName)
		}
		if !testCase.shouldPass && isValidBucketName {
			t.Errorf("Test case %d: Expected bucket name \"%s\" to be invalid", i+1, testCase.bucketName)
		}
	}
}

// Tests for validate object name.
func TestIsValidObjectName(t *testing.T) {
	testCases := []struct {
		objectName string
		shouldPass bool
	}{
		// cases which should pass the test.
		// passing in valid object name.
		{"object", true},
		{"The Shining Script <v1>.pdf", true},
		{"Cost Benefit Analysis (2009-2010).pptx", true},
		{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", true},
		{"SHØRT", true},
		{"There are far too many object names, and far too few bucket names!", true},
		// cases for which test should fail.
		// passing invalid object names.
		{"", false},
		{string([]byte{0xff, 0xfe, 0xfd}), false},
	}

	for i, testCase := range testCases {
		isValidObjectName := IsValidObjectName(testCase.objectName)
		if testCase.shouldPass && !isValidObjectName {
			t.Errorf("Test case %d: Expected \"%s\" to be a valid object name", i+1, testCase.objectName)
		}
		if !testCase.shouldPass && isValidObjectName {
			t.Errorf("Test case %d: Expected object name \"%s\" to be invalid", i+1, testCase.objectName)
		}
	}
}

// Tests validate bucket LocationConstraint.
func TestIsValidLocationContraint(t *testing.T) {
	// generates the input request with XML bucket configuration set to the request body.
	createExpectedRequest := func(req *http.Request, location string) (*http.Request, error) {
		createBucketConfig := createBucketLocationConfiguration{}
		createBucketConfig.Location = location
		var createBucketConfigBytes []byte
		createBucketConfigBytes, e := xml.Marshal(createBucketConfig)
		if e != nil {
			return nil, e
		}
		createBucketConfigBuffer := bytes.NewBuffer(createBucketConfigBytes)
		req.Body = ioutil.NopCloser(createBucketConfigBuffer)
		return req, nil
	}

	testCases := []struct {
		locationForInputRequest string
		serverConfigRegion      string
		expectedCode            APIErrorCode
	}{
		// Test case - 1.
		{"us-east-1", "us-east-1", ErrNone},
		// Test case - 2.
		// In case of empty request body ErrNone is returned.
		{"", "us-east-1", ErrNone},
		// Test case - 3.
		{"eu-central-1", "us-east-1", ErrInvalidRegion},
	}
	for i, testCase := range testCases {
		inputRequest, e := createExpectedRequest(&http.Request{}, testCase.locationForInputRequest)
		if e != nil {
			t.Fatalf("Test %d: Failed to Marshal bucket configuration", i+1)
		}
		actualCode := isValidLocationContraint(inputRequest.Body, testCase.serverConfigRegion)
		if testCase.expectedCode != actualCode {
			t.Errorf("Test %d: Expected the APIErrCode to be %d, but instead found %d", i+1, testCase.expectedCode, actualCode)
		}
	}
}