package testutil

import (
	"context"
	"database/sql"
	"errors"
	"fmt"
	"io/ioutil"
	"net/http"
	"strings"
	"testing"
	"time"

	"github.com/gofrs/uuid"

	"github.com/Pallinder/go-randomdata"

	_ "github.com/denisenkom/go-mssqldb"
	"github.com/hasura/graphql-engine/cli/internal/httpc"
	_ "github.com/lib/pq"
	"github.com/ory/dockertest/v3"
)

// As a workaround for using test helpers on Ginkgo tests
// and normal go tests this interfaces is introduced
// ginkgo specs do not have a handle of *testing.T and therefore
// cannot be used directly in test helpers
type TestingT interface {
	Skip(args ...interface{})
	Fatal(args ...interface{})
	Fatalf(format string, args ...interface{})
}

func StartHasura(t TestingT, version string) (port string, teardown func()) {
	checkIfSkippable(t)
	if len(version) == 0 {
		t.Fatal("no hasura version provided, probably use testutil.HasuraVersion")
	}
	var err error
	pool, err := dockertest.NewPool("")
	if err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}
	uniqueName := getUniqueName(t)
	pgopts := &dockertest.RunOptions{
		Name:       fmt.Sprintf("%s-%s", uniqueName, "pg"),
		Repository: "postgres",
		Tag:        "11",
		Env: []string{
			"POSTGRES_PASSWORD=postgrespassword",
			"POSTGRES_DB=postgres",
		},
		ExposedPorts: []string{"5432/tcp"},
	}
	pg, err := pool.RunWithOptions(pgopts)
	if err != nil {
		t.Fatalf("Could not start resource: %s", err)
	}
	var db *sql.DB
	if err = pool.Retry(func() error {
		var err error
		db, err = sql.Open("postgres", fmt.Sprintf("postgres://postgres:postgrespassword@%s:%s/%s?sslmode=disable", "0.0.0.0", pg.GetPort("5432/tcp"), "postgres"))
		if err != nil {
			return err
		}
		return db.Ping()
	}); err != nil {
		t.Fatal(err)
	}
	hasuraopts := &dockertest.RunOptions{
		Name:       fmt.Sprintf("%s-%s", uniqueName, "hasura"),
		Repository: "hasura/graphql-engine",
		Tag:        version,
		Env: []string{
			fmt.Sprintf("HASURA_GRAPHQL_DATABASE_URL=postgres://postgres:postgrespassword@%s:%s/postgres", DockerSwitchIP, pg.GetPort("5432/tcp")),
			`HASURA_GRAPHQL_ENABLE_CONSOLE=true`,
			"HASURA_GRAPHQL_DEV_MODE=true",
			"HASURA_GRAPHQL_ENABLED_LOG_TYPES=startup, http-log, webhook-log, websocket-log, query-log",
		},
		ExposedPorts: []string{"8080/tcp"},
	}
	hasura, err := pool.RunWithOptions(hasuraopts)
	if err != nil {
		t.Fatalf("Could not start resource: %s", err)
	}

	if err = pool.Retry(func() error {
		var err error
		resp, err := http.Get(fmt.Sprintf("http://localhost:%s/healthz", hasura.GetPort("8080/tcp")))
		if err != nil {
			return err
		}
		if resp.StatusCode != http.StatusOK {
			return errors.New("not ready")
		}
		return nil
	}); err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}

	teardown = func() {
		if err = pool.Purge(hasura); err != nil {
			t.Fatalf("Could not purge resource: %s", err)
		}
		if err = pool.Purge(pg); err != nil {
			t.Fatalf("Could not purge resource: %s", err)
		}
	}
	return hasura.GetPort("8080/tcp"), teardown
}

func StartHasuraWithMetadataDatabase(t *testing.T, version string) (port string, teardown func()) {
	checkIfSkippable(t)
	if len(version) == 0 {
		t.Fatal("no hasura version provided, probably use testutil.HasuraVersion")
	}
	var err error
	pool, err := dockertest.NewPool("")
	if err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}
	uniqueName := getUniqueName(t)
	pgopts := &dockertest.RunOptions{
		Name:       fmt.Sprintf("%s-%s", uniqueName, "pg"),
		Repository: "postgres",
		Tag:        "11",
		Env: []string{
			"POSTGRES_PASSWORD=postgrespassword",
			"POSTGRES_DB=postgres",
		},
	}
	pg, err := pool.RunWithOptions(pgopts)
	if err != nil {
		t.Fatalf("Could not start resource: %s", err)
	}
	var db *sql.DB
	if err = pool.Retry(func() error {
		var err error
		db, err = sql.Open("postgres", fmt.Sprintf("postgres://postgres:postgrespassword@%s:%s/%s?sslmode=disable", "0.0.0.0", pg.GetPort("5432/tcp"), "postgres"))
		if err != nil {
			return err
		}
		return db.Ping()
	}); err != nil {
		t.Fatal(err)
	}
	hasuraopts := &dockertest.RunOptions{
		Name:       fmt.Sprintf("%s-%s", uniqueName, "hasura"),
		Repository: "hasura/graphql-engine",
		Tag:        version,
		Env: []string{
			fmt.Sprintf("HASURA_GRAPHQL_METADATA_DATABASE_URL=postgres://postgres:postgrespassword@%s:%s/postgres", DockerSwitchIP, pg.GetPort("5432/tcp")),
			`HASURA_GRAPHQL_ENABLE_CONSOLE=true`,
			"HASURA_GRAPHQL_DEV_MODE=true",
			"HASURA_GRAPHQL_ENABLED_LOG_TYPES=startup, http-log, webhook-log, websocket-log, query-log",
		},
		ExposedPorts: []string{"8080/tcp"},
	}
	hasura, err := pool.RunWithOptions(hasuraopts)
	if err != nil {
		t.Fatalf("Could not start resource: %s", err)
	}

	if err = pool.Retry(func() error {
		var err error
		resp, err := http.Get(fmt.Sprintf("http://localhost:%s/healthz", hasura.GetPort("8080/tcp")))
		if err != nil {
			return err
		}
		if resp.StatusCode != http.StatusOK {
			return errors.New("not ready")
		}
		return nil
	}); err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}

	teardown = func() {
		if err = pool.Purge(hasura); err != nil {
			t.Fatalf("Could not purge resource: %s", err)
		}
		if err = pool.Purge(pg); err != nil {
			t.Fatalf("Could not purge resource: %s", err)
		}
	}
	return hasura.GetPort("8080/tcp"), teardown
}

// starts a hasura instance with a metadata database and a msssql source
// returns the mssql port, source name and teardown function
func StartHasuraWithMSSQLSource(t *testing.T, version string) (string, string, func()) {
	hasuraPort, hasuraTeardown := StartHasuraWithMetadataDatabase(t, version)
	sourcename := randomdata.SillyName()
	mssqlPort, mssqlTeardown := startMSSQLContainer(t)

	teardown := func() {
		hasuraTeardown()
		mssqlTeardown()
	}
	connectionString := fmt.Sprintf("DRIVER={ODBC Driver 17 for SQL Server};SERVER=%s,%s;DATABASE=master;Uid=SA;Pwd=%s;Encrypt=no", DockerSwitchIP, mssqlPort, MSSQLPassword)
	addSourceToHasura(t, fmt.Sprintf("%s:%s", BaseURL, hasuraPort), connectionString, sourcename)
	return hasuraPort, sourcename, teardown
}

// startsMSSQLContainer and creates a database and returns the port number
func startMSSQLContainer(t *testing.T) (string, func()) {
	pool, err := dockertest.NewPool("")
	pool.MaxWait = time.Minute
	if err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}
	opts := &dockertest.RunOptions{
		Name:       fmt.Sprintf("%s-%s", randomdata.SillyName(), "mssql"),
		Repository: "mcr.microsoft.com/mssql/server",
		Tag:        "2019-latest",
		Env: []string{
			"ACCEPT_EULA=Y",
			fmt.Sprintf("SA_PASSWORD=%s", MSSQLPassword),
		},
		ExposedPorts: []string{"1433/tcp"},
	}
	mssql, err := pool.RunWithOptions(opts)
	if err != nil {
		t.Fatalf("Could not start resource: %s", err)
	}
	if err = pool.Retry(func() error {
		connString := fmt.Sprintf("server=%s;user id=%s;password=%s;port=%s;database=%s;",
			"0.0.0.0", "SA", MSSQLPassword, mssql.GetPort("1433/tcp"), "master")
		db, err := sql.Open("sqlserver", connString)
		if err != nil {
			return err
		}
		ctx := context.Background()
		err = db.PingContext(ctx)
		if err != nil {
			return err
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}
	teardown := func() {
		if err = pool.Purge(mssql); err != nil {
			t.Fatalf("Could not purge resource: %s", err)
		}
	}
	return mssql.GetPort("1433/tcp"), teardown
}

func addSourceToHasura(t *testing.T, hasuraEndpoint, connectionString, sourceName string) {
	url := fmt.Sprintf("%s/v1/metadata", hasuraEndpoint)
	body := fmt.Sprintf(`
{
  "type": "mssql_add_source",
  "args": {
    "name": "%s",
    "configuration": {
        "connection_info": {
            "connection_string": "%s"
        }
    }
  }
}
`, sourceName, connectionString)
	fmt.Println(connectionString)
	fmt.Println(hasuraEndpoint)
	r, err := http.Post(url, "application/json", strings.NewReader(body))
	if err != nil {
		t.Fatal(err)
	}
	if r.StatusCode != http.StatusOK {
		body, err := ioutil.ReadAll(r.Body)
		if err != nil {
			t.Fatal(err)
		}
		defer r.Body.Close()
		t.Fatalf("cannot add mssql source to hasura: %s", string(body))
	}
}
func NewHttpcClient(t *testing.T, port string, headers map[string]string) *httpc.Client {
	c, err := httpc.New(nil, fmt.Sprintf("%s:%s/", BaseURL, port), headers)
	if err != nil {
		t.Fatal(err)
	}
	return c
}

func getUniqueName(t TestingT) string {
	u, err := uuid.NewV4()
	// assert.NoError(t, err)
	if err != nil {
		t.Fatalf("Could not connect to docker: %s", err)
	}
	return u.String() + "-" + randomdata.SillyName()
}

func checkIfSkippable(t TestingT) {
	if SkipDockerTests {
		t.Skip()
	}
}