/*
   Copyright 2014 CoreOS, 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 ec2

import (
	"bytes"
	"fmt"
	"reflect"
	"testing"

	"github.com/coreos/coreos-cloudinit/datasource/metadata"
	"github.com/coreos/coreos-cloudinit/datasource/metadata/test"
	"github.com/coreos/coreos-cloudinit/pkg"
)

func TestType(t *testing.T) {
	want := "ec2-metadata-service"
	if kind := (metadataService{}).Type(); kind != want {
		t.Fatalf("bad type: want %q, got %q", want, kind)
	}
}

func TestFetchAttributes(t *testing.T) {
	for _, s := range []struct {
		resources map[string]string
		err       error
		tests     []struct {
			path string
			val  []string
		}
	}{
		{
			resources: map[string]string{
				"/":      "a\nb\nc/",
				"/c/":    "d\ne/",
				"/c/e/":  "f",
				"/a":     "1",
				"/b":     "2",
				"/c/d":   "3",
				"/c/e/f": "4",
			},
			tests: []struct {
				path string
				val  []string
			}{
				{"/", []string{"a", "b", "c/"}},
				{"/b", []string{"2"}},
				{"/c/d", []string{"3"}},
				{"/c/e/", []string{"f"}},
			},
		},
		{
			err: fmt.Errorf("test error"),
			tests: []struct {
				path string
				val  []string
			}{
				{"", nil},
			},
		},
	} {
		service := metadataService{metadata.MetadataService{
			Client: &test.HttpClient{Resources: s.resources, Err: s.err},
		}}
		for _, tt := range s.tests {
			attrs, err := service.fetchAttributes(tt.path)
			if err != s.err {
				t.Fatalf("bad error for %q (%q): want %q, got %q", tt.path, s.resources, s.err, err)
			}
			if !reflect.DeepEqual(attrs, tt.val) {
				t.Fatalf("bad fetch for %q (%q): want %q, got %q", tt.path, s.resources, tt.val, attrs)
			}
		}
	}
}

func TestFetchAttribute(t *testing.T) {
	for _, s := range []struct {
		resources map[string]string
		err       error
		tests     []struct {
			path string
			val  string
		}
	}{
		{
			resources: map[string]string{
				"/":      "a\nb\nc/",
				"/c/":    "d\ne/",
				"/c/e/":  "f",
				"/a":     "1",
				"/b":     "2",
				"/c/d":   "3",
				"/c/e/f": "4",
			},
			tests: []struct {
				path string
				val  string
			}{
				{"/a", "1"},
				{"/b", "2"},
				{"/c/d", "3"},
				{"/c/e/f", "4"},
			},
		},
		{
			err: fmt.Errorf("test error"),
			tests: []struct {
				path string
				val  string
			}{
				{"", ""},
			},
		},
	} {
		service := metadataService{metadata.MetadataService{
			Client: &test.HttpClient{Resources: s.resources, Err: s.err},
		}}
		for _, tt := range s.tests {
			attr, err := service.fetchAttribute(tt.path)
			if err != s.err {
				t.Fatalf("bad error for %q (%q): want %q, got %q", tt.path, s.resources, s.err, err)
			}
			if attr != tt.val {
				t.Fatalf("bad fetch for %q (%q): want %q, got %q", tt.path, s.resources, tt.val, attr)
			}
		}
	}
}

func TestFetchMetadata(t *testing.T) {
	for _, tt := range []struct {
		root         string
		metadataPath string
		resources    map[string]string
		expect       []byte
		clientErr    error
		expectErr    error
	}{
		{
			root:         "/",
			metadataPath: "2009-04-04/meta-data",
			resources: map[string]string{
				"/2009-04-04/meta-data/public-keys": "bad\n",
			},
			expectErr: fmt.Errorf("malformed public key: \"bad\""),
		},
		{
			root:         "/",
			metadataPath: "2009-04-04/meta-data",
			resources: map[string]string{
				"/2009-04-04/meta-data/hostname":                    "host",
				"/2009-04-04/meta-data/local-ipv4":                  "1.2.3.4",
				"/2009-04-04/meta-data/public-ipv4":                 "5.6.7.8",
				"/2009-04-04/meta-data/public-keys":                 "0=test1\n",
				"/2009-04-04/meta-data/public-keys/0":               "openssh-key",
				"/2009-04-04/meta-data/public-keys/0/openssh-key":   "key",
				"/2009-04-04/meta-data/network_config/content_path": "path",
			},
			expect: []byte(`{"hostname":"host","local-ipv4":"1.2.3.4","network_config":{"content_path":"path"},"public-ipv4":"5.6.7.8","public_keys":{"test1":"key"}}`),
		},
		{
			root:         "/",
			metadataPath: "2009-04-04/meta-data",
			resources: map[string]string{
				"/2009-04-04/meta-data/hostname":                    "host domain another_domain",
				"/2009-04-04/meta-data/local-ipv4":                  "1.2.3.4",
				"/2009-04-04/meta-data/public-ipv4":                 "5.6.7.8",
				"/2009-04-04/meta-data/public-keys":                 "0=test1\n",
				"/2009-04-04/meta-data/public-keys/0":               "openssh-key",
				"/2009-04-04/meta-data/public-keys/0/openssh-key":   "key",
				"/2009-04-04/meta-data/network_config/content_path": "path",
			},
			expect: []byte(`{"hostname":"host","local-ipv4":"1.2.3.4","network_config":{"content_path":"path"},"public-ipv4":"5.6.7.8","public_keys":{"test1":"key"}}`),
		},
		{
			clientErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")},
			expectErr: pkg.ErrTimeout{Err: fmt.Errorf("test error")},
		},
	} {
		service := &metadataService{metadata.MetadataService{
			Root:         tt.root,
			Client:       &test.HttpClient{Resources: tt.resources, Err: tt.clientErr},
			MetadataPath: tt.metadataPath,
		}}
		metadata, err := service.FetchMetadata()
		if Error(err) != Error(tt.expectErr) {
			t.Fatalf("bad error (%q): want %q, got %q", tt.resources, tt.expectErr, err)
		}
		if !bytes.Equal(metadata, tt.expect) {
			t.Fatalf("bad fetch (%q): want %q, got %q", tt.resources, tt.expect, metadata)
		}
	}
}

func Error(err error) string {
	if err != nil {
		return err.Error()
	}
	return ""
}