/*
Copyright 2017 The Kubernetes Authors.

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 transip

import (
	"testing"

	"github.com/stretchr/testify/assert"
	transip "github.com/transip/gotransip/domain"

	"sigs.k8s.io/external-dns/endpoint"
)

func TestTransIPDnsEntriesAreEqual(t *testing.T) {
	p := TransIPProvider{}
	// test with equal set
	a := transip.DNSEntries{
		transip.DNSEntry{
			Name:    "www.example.org",
			Type:    transip.DNSEntryTypeCNAME,
			TTL:     3600,
			Content: "www.example.com",
		},
		transip.DNSEntry{
			Name:    "www.example.com",
			Type:    transip.DNSEntryTypeA,
			TTL:     3600,
			Content: "192.168.0.1",
		},
	}

	b := transip.DNSEntries{
		transip.DNSEntry{
			Name:    "www.example.com",
			Type:    transip.DNSEntryTypeA,
			TTL:     3600,
			Content: "192.168.0.1",
		},
		transip.DNSEntry{
			Name:    "www.example.org",
			Type:    transip.DNSEntryTypeCNAME,
			TTL:     3600,
			Content: "www.example.com",
		},
	}

	assert.Equal(t, true, p.dnsEntriesAreEqual(a, b))

	// change type on one of b's records
	b[1].Type = transip.DNSEntryTypeNS
	assert.Equal(t, false, p.dnsEntriesAreEqual(a, b))
	b[1].Type = transip.DNSEntryTypeCNAME

	// change ttl on one of b's records
	b[1].TTL = 1800
	assert.Equal(t, false, p.dnsEntriesAreEqual(a, b))
	b[1].TTL = 3600

	// change name on one of b's records
	b[1].Name = "example.org"
	assert.Equal(t, false, p.dnsEntriesAreEqual(a, b))

	// remove last entry of b
	b = b[:1]
	assert.Equal(t, false, p.dnsEntriesAreEqual(a, b))
}

func TestTransIPGetMinimalValidTTL(t *testing.T) {
	p := TransIPProvider{}
	// test with 'unconfigured' TTL
	ep := &endpoint.Endpoint{}
	assert.Equal(t, int64(transipMinimalValidTTL), p.getMinimalValidTTL(ep))

	// test with lower than minimal ttl
	ep.RecordTTL = (transipMinimalValidTTL - 1)
	assert.Equal(t, int64(transipMinimalValidTTL), p.getMinimalValidTTL(ep))

	// test with higher than minimal ttl
	ep.RecordTTL = (transipMinimalValidTTL + 1)
	assert.Equal(t, int64(transipMinimalValidTTL+1), p.getMinimalValidTTL(ep))
}

func TestTransIPRecordNameForEndpoint(t *testing.T) {
	p := TransIPProvider{}
	ep := &endpoint.Endpoint{
		DNSName: "example.org",
	}
	d := transip.Domain{
		Name: "example.org",
	}

	assert.Equal(t, "@", p.recordNameForEndpoint(ep, d))

	ep.DNSName = "www.example.org"
	assert.Equal(t, "www", p.recordNameForEndpoint(ep, d))
}

func TestTransIPEndpointNameForRecord(t *testing.T) {
	p := TransIPProvider{}
	r := transip.DNSEntry{
		Name: "@",
	}
	d := transip.Domain{
		Name: "example.org",
	}

	assert.Equal(t, d.Name, p.endpointNameForRecord(r, d))

	r.Name = "www"
	assert.Equal(t, "www.example.org", p.endpointNameForRecord(r, d))
}

func TestTransIPAddEndpointToEntries(t *testing.T) {
	p := TransIPProvider{}

	// prepare endpoint
	ep := &endpoint.Endpoint{
		DNSName:    "www.example.org",
		RecordType: "A",
		RecordTTL:  1800,
		Targets: []string{
			"192.168.0.1",
			"192.168.0.2",
		},
	}

	// prepare zone with DNS entry set
	zone := transip.Domain{
		Name: "example.org",
		// 2 matching A records
		DNSEntries: transip.DNSEntries{
			// 1 non-matching A record
			transip.DNSEntry{
				Name:    "mail",
				Type:    transip.DNSEntryTypeA,
				Content: "192.168.0.1",
				TTL:     3600,
			},
			// 1 non-matching MX record
			transip.DNSEntry{
				Name:    "@",
				Type:    transip.DNSEntryTypeMX,
				Content: "mail.example.org",
				TTL:     3600,
			},
		},
	}

	// add endpoint to zone's entries
	result := p.addEndpointToEntries(ep, zone, zone.DNSEntries)

	assert.Equal(t, 4, len(result))
	assert.Equal(t, "mail", result[0].Name)
	assert.Equal(t, transip.DNSEntryTypeA, result[0].Type)
	assert.Equal(t, "@", result[1].Name)
	assert.Equal(t, transip.DNSEntryTypeMX, result[1].Type)
	assert.Equal(t, "www", result[2].Name)
	assert.Equal(t, transip.DNSEntryTypeA, result[2].Type)
	assert.Equal(t, "192.168.0.1", result[2].Content)
	assert.Equal(t, int64(1800), result[2].TTL)
	assert.Equal(t, "www", result[3].Name)
	assert.Equal(t, transip.DNSEntryTypeA, result[3].Type)
	assert.Equal(t, "192.168.0.2", result[3].Content)
	assert.Equal(t, int64(1800), result[3].TTL)
}

func TestTransIPRemoveEndpointFromEntries(t *testing.T) {
	p := TransIPProvider{}

	// prepare endpoint
	ep := &endpoint.Endpoint{
		DNSName:    "www.example.org",
		RecordType: "A",
	}

	// prepare zone with DNS entry set
	zone := transip.Domain{
		Name: "example.org",
		// 2 matching A records
		DNSEntries: transip.DNSEntries{
			transip.DNSEntry{
				Name:    "www",
				Type:    transip.DNSEntryTypeA,
				Content: "192.168.0.1",
				TTL:     3600,
			},
			transip.DNSEntry{
				Name:    "www",
				Type:    transip.DNSEntryTypeA,
				Content: "192.168.0.2",
				TTL:     3600,
			},
			// 1 non-matching A record
			transip.DNSEntry{
				Name:    "mail",
				Type:    transip.DNSEntryTypeA,
				Content: "192.168.0.1",
				TTL:     3600,
			},
			// 1 non-matching MX record
			transip.DNSEntry{
				Name:    "@",
				Type:    transip.DNSEntryTypeMX,
				Content: "mail.example.org",
				TTL:     3600,
			},
		},
	}

	// remove endpoint from zone's entries
	result := p.removeEndpointFromEntries(ep, zone)

	assert.Equal(t, 2, len(result))
	assert.Equal(t, "mail", result[0].Name)
	assert.Equal(t, transip.DNSEntryTypeA, result[0].Type)
	assert.Equal(t, "@", result[1].Name)
	assert.Equal(t, transip.DNSEntryTypeMX, result[1].Type)
}