// Copyright 2019 Drone.IO Inc. All rights reserved.
// Use of this source code is governed by the Drone Non-Commercial License
// that can be found in the LICENSE file.

package builds

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/drone/drone/handler/api/errors"
	"github.com/drone/drone/handler/api/request"
	"github.com/drone/drone/mock"
	"github.com/go-chi/chi"
	"github.com/golang/mock/gomock"
	"github.com/google/go-cmp/cmp"
)

func TestPurge(t *testing.T) {
	controller := gomock.NewController(t)
	defer controller.Finish()

	repos := mock.NewMockRepositoryStore(controller)
	repos.EXPECT().FindName(gomock.Any(), gomock.Any(), mockRepo.Name).Return(mockRepo, nil)

	builds := mock.NewMockBuildStore(controller)
	builds.EXPECT().Purge(gomock.Any(), mockRepo.ID, int64(50)).Return(nil)

	c := new(chi.Context)
	c.URLParams.Add("owner", "octocat")
	c.URLParams.Add("name", "hello-world")

	w := httptest.NewRecorder()
	r := httptest.NewRequest("DELETE", "/?before=50", nil)
	r = r.WithContext(
		context.WithValue(request.WithUser(r.Context(), mockUser), chi.RouteCtxKey, c),
	)

	HandlePurge(repos, builds)(w, r)
	if got, want := w.Code, http.StatusNoContent; want != got {
		t.Errorf("Want response code %d, got %d", want, got)
	}
}

// The test verifies that a 404 Not Found error is returned
// if the repository store returns an error.
func TestPurge_NotFound(t *testing.T) {
	controller := gomock.NewController(t)
	defer controller.Finish()

	repos := mock.NewMockRepositoryStore(controller)
	repos.EXPECT().FindName(gomock.Any(), gomock.Any(), mockRepo.Name).Return(nil, errors.ErrNotFound)

	c := new(chi.Context)
	c.URLParams.Add("owner", "octocat")
	c.URLParams.Add("name", "hello-world")

	w := httptest.NewRecorder()
	r := httptest.NewRequest("DELETE", "/?before=50", nil)
	r = r.WithContext(
		context.WithValue(request.WithUser(r.Context(), mockUser), chi.RouteCtxKey, c),
	)

	HandlePurge(repos, nil)(w, r)
	if got, want := w.Code, 404; want != got {
		t.Errorf("Want response code %d, got %d", want, got)
	}

	got, want := new(errors.Error), errors.ErrNotFound
	json.NewDecoder(w.Body).Decode(got)
	if diff := cmp.Diff(got, want); len(diff) != 0 {
		t.Errorf(diff)
	}
}

// The test verifies that a 400 Bad Request error is returned
// if the user provides an invalid ?before query parameter
// that cannot be parsed.
func TestPurge_BadRequest(t *testing.T) {
	controller := gomock.NewController(t)
	defer controller.Finish()

	c := new(chi.Context)
	c.URLParams.Add("owner", "octocat")
	c.URLParams.Add("name", "hello-world")

	w := httptest.NewRecorder()
	r := httptest.NewRequest("DELETE", "/?before=XLII", nil)
	r = r.WithContext(
		context.WithValue(request.WithUser(r.Context(), mockUser), chi.RouteCtxKey, c),
	)

	HandlePurge(nil, nil)(w, r)
	if got, want := w.Code, 400; want != got {
		t.Errorf("Want response code %d, got %d", want, got)
	}

	got, want := new(errors.Error), &errors.Error{
		Message: `strconv.ParseInt: parsing "XLII": invalid syntax`,
	}
	json.NewDecoder(w.Body).Decode(got)
	if diff := cmp.Diff(got, want); len(diff) != 0 {
		t.Errorf(diff)
	}
}

// The test verifies that a 500 Internal server error is
// returned if the database purge transaction fails.
func TestPurge_InternalError(t *testing.T) {
	controller := gomock.NewController(t)
	defer controller.Finish()

	repos := mock.NewMockRepositoryStore(controller)
	repos.EXPECT().FindName(gomock.Any(), gomock.Any(), mockRepo.Name).Return(mockRepo, nil)

	builds := mock.NewMockBuildStore(controller)
	builds.EXPECT().Purge(gomock.Any(), mockRepo.ID, int64(50)).Return(errors.ErrNotFound)

	c := new(chi.Context)
	c.URLParams.Add("owner", "octocat")
	c.URLParams.Add("name", "hello-world")

	w := httptest.NewRecorder()
	r := httptest.NewRequest("DELETE", "/?before=50", nil)
	r = r.WithContext(
		context.WithValue(request.WithUser(r.Context(), mockUser), chi.RouteCtxKey, c),
	)

	HandlePurge(repos, builds)(w, r)
	if got, want := w.Code, http.StatusInternalServerError; want != got {
		t.Errorf("Want response code %d, got %d", want, got)
	}

	got, want := new(errors.Error), errors.ErrNotFound
	json.NewDecoder(w.Body).Decode(got)
	if diff := cmp.Diff(got, want); len(diff) != 0 {
		t.Errorf(diff)
	}
}