/*
Copyright 2015 The Kubernetes Authors All rights reserved.

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 registry

// TODO(jackgr): Mock github repository service to test package and template registry implementations.

import (
	"bytes"
	"io/ioutil"

	"github.com/kubernetes/deployment-manager/common"
	"github.com/kubernetes/deployment-manager/util"

	"fmt"
	"net/http"
	"net/url"
	"regexp"
	"strings"
)

type TestURLAndError struct {
	URL string
	Err error
}

type DownloadResponse struct {
	Err  error
	Code int
	Body string
}

type testGithubRegistryProvider struct {
	shortURL          string
	responses         map[Type]TestURLAndError
	downloadResponses map[string]DownloadResponse
}

type testGithubRegistry struct {
	githubRegistry
	responses         map[Type]TestURLAndError
	downloadResponses map[string]DownloadResponse
}

func NewTestGithubRegistryProvider(shortURL string, responses map[Type]TestURLAndError) GithubRegistryProvider {
	return testGithubRegistryProvider{
		shortURL:  util.TrimURLScheme(shortURL),
		responses: responses,
	}
}

func NewTestGithubRegistryProviderWithDownloads(shortURL string, responses map[Type]TestURLAndError, downloadResponses map[string]DownloadResponse) GithubRegistryProvider {
	return testGithubRegistryProvider{
		shortURL:          util.TrimURLScheme(shortURL),
		responses:         responses,
		downloadResponses: downloadResponses,
	}
}

func (tgrp testGithubRegistryProvider) GetGithubRegistry(cr common.Registry) (GithubRegistry, error) {
	trimmed := util.TrimURLScheme(cr.URL)
	if strings.HasPrefix(trimmed, tgrp.shortURL) {
		ghr, err := newGithubRegistry(cr.Name, trimmed, cr.Format, http.DefaultClient, nil)
		if err != nil {
			panic(fmt.Errorf("cannot create a github registry: %s", err))
		}

		return &testGithubRegistry{
			githubRegistry:    *ghr,
			responses:         tgrp.responses,
			downloadResponses: tgrp.downloadResponses,
		}, nil
	}

	panic(fmt.Errorf("unknown registry: %v", cr))
}

func (tgr testGithubRegistry) ListTypes(regex *regexp.Regexp) ([]Type, error) {
	panic(fmt.Errorf("ListTypes should not be called in the test"))
}

func (tgr testGithubRegistry) GetDownloadURLs(t Type) ([]*url.URL, error) {
	result := tgr.responses[t]
	URL, err := url.Parse(result.URL)
	if err != nil {
		panic(err)
	}

	return []*url.URL{URL}, result.Err
}

func (g testGithubRegistry) Do(req *http.Request) (resp *http.Response, err error) {
	response := g.downloadResponses[req.URL.String()]
	return &http.Response{StatusCode: response.Code, Body: ioutil.NopCloser(bytes.NewBufferString(response.Body))}, response.Err
}

type testGCSRegistryProvider struct {
	shortURL  string
	responses map[Type]TestURLAndError
}

type testGCSRegistry struct {
	GCSRegistry
	responses map[Type]TestURLAndError
}

func NewTestGCSRegistryProvider(shortURL string, responses map[Type]TestURLAndError) GCSRegistryProvider {
	return testGCSRegistryProvider{
		shortURL:  util.TrimURLScheme(shortURL),
		responses: responses,
	}
}

func (tgrp testGCSRegistryProvider) GetGCSRegistry(cr common.Registry) (ObjectStorageRegistry, error) {
	trimmed := util.TrimURLScheme(cr.URL)
	if strings.HasPrefix(trimmed, tgrp.shortURL) {
		gcsr, err := NewGCSRegistry(cr.Name, trimmed, http.DefaultClient, nil)
		if err != nil {
			panic(fmt.Errorf("cannot create gcs registry: %s", err))
		}

		return &testGCSRegistry{
			GCSRegistry: *gcsr,
			responses:   tgrp.responses,
		}, nil
	}

	panic(fmt.Errorf("unknown registry: %v", cr))
}