package api_test

import (
	"context"
	"crypto/tls"
	"crypto/x509"
	"encoding/json"
	"io/ioutil"
	"os"
	"testing"
	"time"

	"github.com/anuvu/zot/pkg/api"
	. "github.com/smartystreets/goconvey/convey"
	"gopkg.in/resty.v1"
)

const (
	BaseURL1       = "http://127.0.0.1:8081"
	BaseURL2       = "http://127.0.0.1:8082"
	BaseSecureURL2 = "https://127.0.0.1:8082"
	username       = "test"
	passphrase     = "test"
	htpasswdPath   = "../../test/data/htpasswd" // nolint (gosec) - this is just test data
)

func TestNew(t *testing.T) {
	Convey("Make a new controller", t, func() {
		config := api.NewConfig()
		So(config, ShouldNotBeNil)
		So(api.NewController(config), ShouldNotBeNil)
	})
}

func TestBasicAuth(t *testing.T) {
	Convey("Make a new controller", t, func() {
		config := api.NewConfig()
		config.HTTP.Port = "8081"
		config.HTTP.Auth.HTPasswd.Path = htpasswdPath
		c := api.NewController(config)
		dir, err := ioutil.TempDir("", "oci-repo-test")
		if err != nil {
			panic(err)
		}
		defer os.RemoveAll(dir)
		c.Config.Storage.RootDirectory = dir
		go func() {
			// this blocks
			if err := c.Run(); err != nil {
				return
			}
		}()

		// wait till ready
		for {
			_, err := resty.R().Get(BaseURL1)
			if err == nil {
				break
			}
			time.Sleep(100 * time.Millisecond)
		}

		defer func() {
			ctx := context.Background()
			_ = c.Server.Shutdown(ctx)
		}()

		// without creds, should get access error
		resp, err := resty.R().Get(BaseURL1 + "/v2/")
		So(err, ShouldBeNil)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 401)
		var e api.Error
		err = json.Unmarshal(resp.Body(), &e)
		So(err, ShouldBeNil)

		// with creds, should get expected status code
		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseURL1)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 404)

		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseURL1 + "/v2/")
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 200)
	})
}

func TestTLSWithBasicAuth(t *testing.T) {
	Convey("Make a new controller", t, func() {
		caCert, err := ioutil.ReadFile("../../test/data/ca.crt")
		So(err, ShouldBeNil)
		caCertPool := x509.NewCertPool()
		caCertPool.AppendCertsFromPEM(caCert)

		resty.SetTLSClientConfig(&tls.Config{RootCAs: caCertPool})
		defer func() { resty.SetTLSClientConfig(nil) }()
		config := api.NewConfig()
		config.HTTP.Port = "8082"
		config.HTTP.Auth.HTPasswd.Path = htpasswdPath
		config.HTTP.TLS.Cert = "../../test/data/server.crt"
		config.HTTP.TLS.Key = "../../test/data/server.key"

		c := api.NewController(config)
		dir, err := ioutil.TempDir("", "oci-repo-test")
		if err != nil {
			panic(err)
		}
		defer os.RemoveAll(dir)
		c.Config.Storage.RootDirectory = dir
		go func() {
			// this blocks
			if err := c.Run(); err != nil {
				return
			}
		}()

		// wait till ready
		for {
			_, err := resty.R().Get(BaseURL2)
			if err == nil {
				break
			}
			time.Sleep(100 * time.Millisecond)
		}

		defer func() {
			ctx := context.Background()
			_ = c.Server.Shutdown(ctx)
		}()

		// accessing insecure HTTP site should fail
		resp, err := resty.R().Get(BaseURL2)
		So(err, ShouldBeNil)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 400)

		// without creds, should get access error
		resp, err = resty.R().Get(BaseSecureURL2 + "/v2/")
		So(err, ShouldBeNil)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 401)
		var e api.Error
		err = json.Unmarshal(resp.Body(), &e)
		So(err, ShouldBeNil)

		// with creds, should get expected status code
		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseSecureURL2)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 404)

		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseSecureURL2 + "/v2/")
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 200)
	})
}

func TestTLSMutualAuth(t *testing.T) {
	Convey("Make a new controller", t, func() {
		caCert, err := ioutil.ReadFile("../../test/data/ca.crt")
		So(err, ShouldBeNil)
		caCertPool := x509.NewCertPool()
		caCertPool.AppendCertsFromPEM(caCert)

		resty.SetTLSClientConfig(&tls.Config{RootCAs: caCertPool})
		defer func() { resty.SetTLSClientConfig(nil) }()
		config := api.NewConfig()
		config.HTTP.Port = "8082"
		config.HTTP.Auth.HTPasswd.Path = htpasswdPath
		config.HTTP.TLS.Cert = "../../test/data/server.crt"
		config.HTTP.TLS.Key = "../../test/data/server.key"
		config.HTTP.TLS.CACert = "../../test/data/ca.crt"

		c := api.NewController(config)
		dir, err := ioutil.TempDir("", "oci-repo-test")
		if err != nil {
			panic(err)
		}
		defer os.RemoveAll(dir)
		c.Config.Storage.RootDirectory = dir
		go func() {
			// this blocks
			if err := c.Run(); err != nil {
				return
			}
		}()

		// wait till ready
		for {
			_, err := resty.R().Get(BaseURL2)
			if err == nil {
				break
			}
			time.Sleep(100 * time.Millisecond)
		}

		defer func() {
			ctx := context.Background()
			_ = c.Server.Shutdown(ctx)
		}()

		// accessing insecure HTTP site should fail
		resp, err := resty.R().Get(BaseURL2)
		So(err, ShouldBeNil)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 400)

		// without client certs and creds, should get conn error
		_, err = resty.R().Get(BaseSecureURL2)
		So(err, ShouldNotBeNil)

		// with creds but without certs, should get conn error
		_, err = resty.R().SetBasicAuth(username, passphrase).Get(BaseSecureURL2)
		So(err, ShouldNotBeNil)

		// setup TLS mutual auth
		cert, err := tls.LoadX509KeyPair("../../test/data/client.crt", "../../test/data/client.key")
		So(err, ShouldBeNil)

		resty.SetCertificates(cert)
		defer func() { resty.SetCertificates(tls.Certificate{}) }()

		// with client certs but without creds, should get access error
		resp, err = resty.R().Get(BaseSecureURL2 + "/v2/")
		So(err, ShouldBeNil)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 401)

		// with client certs and creds, should get expected status code
		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseSecureURL2)
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 404)

		resp, _ = resty.R().SetBasicAuth(username, passphrase).Get(BaseSecureURL2 + "/v2/")
		So(resp, ShouldNotBeNil)
		So(resp.StatusCode(), ShouldEqual, 200)
	})
}