package server

import (
	"context"
	"fmt"
	"io/ioutil"
	"local/dndex/config"
	"local/dndex/server/auth"
	"local/dndex/storage"
	"local/dndex/storage/entity"
	"net/http"
	"net/http/httptest"
	"os"
	"path"
	"strings"
	"testing"
	"time"

	"github.com/google/uuid"
)

var (
	testNamespace  = "col-" + uuid.New().String()[:10]
	testEntityName = "ent-name-" + uuid.New().String()[:10]
	testEntityID   = "ent-id-" + uuid.New().String()[:10]
	testFilename   = "filename-" + uuid.New().String()[:10]
	testContent    = "content-" + uuid.New().String()[:10]
)

func TestRESTRouter(t *testing.T) {
	_, _, clean := testREST(t)
	clean()
	cases := map[string]struct {
		method string
		is404  bool
	}{
		fmt.Sprintf(`%s`, config.New().FilePrefix): {
			method: http.MethodGet,
			is404:  true,
		},
		fmt.Sprintf(`%s/`, config.New().FilePrefix): {
			method: http.MethodGet,
			is404:  true,
		},
		fmt.Sprintf(`%s/%s?g`, config.New().FilePrefix, testFilename): {
			method: http.MethodGet,
		},
		fmt.Sprintf(`%s/%s?pu`, config.New().FilePrefix, testFilename): {
			method: http.MethodPut,
		},
		fmt.Sprintf(`%s?po`, config.New().FilePrefix): {
			method: http.MethodPost,
		},
		fmt.Sprintf(`%s/%s?d`, config.New().FilePrefix, testFilename): {
			method: http.MethodDelete,
		},
		fmt.Sprintf(`%s/fake.fake`, config.New().FilePrefix): {
			method: http.MethodGet,
			is404:  true,
		},
		fmt.Sprintf("/users/%s", testNamespace): {
			method: http.MethodGet,
			is404:  true,
		},
		"/users/register": {
			method: http.MethodPost,
		},
		"/users/login": {
			method: http.MethodPost,
		},
		"/users/": {
			method: http.MethodPost,
			is404:  true,
		},
		"/users": {
			method: http.MethodPost,
			is404:  true,
		},
		"/users?": {
			method: http.MethodPost,
			is404:  true,
		},
		"/entities": {
			method: http.MethodGet,
		},
		"/entities/": {
			method: http.MethodGet,
		},
		fmt.Sprintf("/entities/fake-%s", testEntityID): {
			method: http.MethodGet,
			is404:  true,
		},
		fmt.Sprintf("/entities/%s", testEntityID): {
			method: http.MethodGet,
		},
		fmt.Sprintf("/entities/%s", testEntityID): {
			method: http.MethodPatch,
		},
		fmt.Sprintf("/entities/%s", testEntityID): {
			method: http.MethodPost,
		},
		fmt.Sprintf("/entities/%s", testEntityID): {
			method: http.MethodPut,
		},
		fmt.Sprintf("/entities/%s/connections/uuid", testEntityID): {
			method: http.MethodPatch,
		},
		fmt.Sprintf("/entities/%s/connections/uuid", testEntityID): {
			method: http.MethodPut,
		},
		fmt.Sprintf("/entities/%s/connections/uuid", testEntityID): {
			method: http.MethodPost,
			is404:  true,
		},
		fmt.Sprintf("/entities/%s/connections/", testEntityID): {
			method: http.MethodPost,
		},
		fmt.Sprintf("/entities/%s/connections/", testEntityID): {
			method: http.MethodPut,
		},
		fmt.Sprintf("/entities/%s/connections/", testEntityID): {
			method: http.MethodPatch,
		},
		fmt.Sprintf("/entities/%s/connections", testEntityID): {
			method: http.MethodPost,
		},
		fmt.Sprintf("/entities/%s/connections", testEntityID): {
			method: http.MethodPut,
		},
		fmt.Sprintf("/entities/%s/connections", testEntityID): {
			method: http.MethodPatch,
		},
		"/version": {
			method: http.MethodGet,
		},
		fmt.Sprintf("/entities/%s/connections/uuid/", testEntityID): {
			method: http.MethodDelete,
		},
		fmt.Sprintf("/entities/%s/connections/uuid", testEntityID): {
			method: http.MethodDelete,
		},
		fmt.Sprintf("/entities/%s/connections/?d", testEntityID): {
			method: http.MethodDelete,
		},
		fmt.Sprintf("/entities/%s/connections?d", testEntityID): {
			method: http.MethodDelete,
		},
		fmt.Sprintf("/entities/%s/?d", testEntityID): {
			method: http.MethodDelete,
		},
		fmt.Sprintf("/entities/%s?d", testEntityID): {
			method: http.MethodDelete,
		},
		"/entities/?d": {
			method: http.MethodDelete,
			is404:  true,
		},
		"/entities?d": {
			method: http.MethodDelete,
			is404:  true,
		},
	}

	for name, d := range cases {
		c := d
		path := name
		rest, setAuth, clean := testREST(t)
		defer clean()
		r := httptest.NewRequest(c.method, path, strings.NewReader(``))
		setAuth(r)
		w := httptest.NewRecorder()
		rest.router.ServeHTTP(w, r)
		if (w.Code == http.StatusNotFound) != c.is404 {
			t.Errorf("%s: want 404==%v, got %d: %+v: %s", name, c.is404, w.Code, c, w.Body.Bytes())
		}
	}
}

func testREST(t *testing.T) (*REST, func(r *http.Request), func()) {
	d, err := ioutil.TempDir(os.TempDir(), "tempdir.*")
	if err != nil {
		t.Fatal(err)
	}
	os.MkdirAll(path.Join(d, testNamespace), os.ModePerm)
	if err := ioutil.WriteFile(path.Join(d, testNamespace, testFilename), []byte(testContent), os.ModePerm); err != nil {
		t.Fatal(err)
	}
	os.Setenv("FILEROOT", d)
	os.Setenv("DRIVER_TYPE", "map")
	os.Setenv("AUTH", "true")
	os.Args = os.Args[:1]
	config.New()
	rest, err := NewREST(storage.NewRateLimitedGraph(""))
	if err != nil {
		t.Fatal(err)
	}
	ctx, can := context.WithTimeout(context.Background(), time.Second*5)
	defer can()
	one := randomOne()
	one.Name = testEntityName
	one.ID = testEntityID
	if err := rest.g.Insert(ctx, testNamespace, one); err != nil {
		t.Fatal(err)
	}
	register := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(fmt.Sprintf("%s=%s&%s=%s", auth.UserKey, testNamespace, auth.AuthKey, "password")))
	register.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	if err := auth.Register(rest.g, register); err != nil {
		t.Fatal(err)
	}
	login := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(auth.UserKey+"="+testNamespace))
	login.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	token, err := auth.GeneratePlain(rest.g, login)
	if err != nil {
		t.Fatal(err)
	}
	return rest, func(r *http.Request) {
			r.AddCookie(&http.Cookie{Name: auth.AuthKey, Value: token})
		}, func() {
			os.RemoveAll(d)
		}
}

func randomOne() entity.One {
	return entity.One{
		ID:          "iddd-" + uuid.New().String()[:5],
		Name:        "name-" + uuid.New().String()[:5],
		Type:        "type-" + uuid.New().String()[:5],
		Title:       "titl-" + uuid.New().String()[:5],
		Text:        "text-" + uuid.New().String()[:5],
		Modified:    time.Now().UnixNano(),
		Connections: map[string]entity.Connection{},
		Attachments: map[string]entity.Attachment{
			uuid.New().String()[:5]: entity.Attachment{Location: uuid.New().String()[:5]},
		},
	}
}