package gapi

import (
	"context"
	"testing"
	"time"

	"github.com/FernandoJVideira/api_tmpl/internal/auth"
	db "github.com/FernandoJVideira/api_tmpl/internal/db/sqlc"
	"github.com/FernandoJVideira/api_tmpl/internal/service"
	mocksvc "github.com/FernandoJVideira/api_tmpl/internal/service/mock"
	"github.com/FernandoJVideira/api_tmpl/pb"
	"github.com/FernandoJVideira/api_tmpl/pkg/testutil"
	"github.com/stretchr/testify/require"
	"go.uber.org/mock/gomock"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

func TestUpdateUserRPC(t *testing.T) {
	user, _ := randomUser(t)

	newName := testutil.RandomOwner()
	newEmail := testutil.RandomEmail()
	invalidEmail := "invalid-email-format"

	testCases := []struct {
		name          string
		req           *pb.UpdateUserRequest
		buildStubs    func(userService *mocksvc.MockUserService)
		buildContext  func(t *testing.T, tokenMaker auth.Maker) context.Context
		checkResponse func(t *testing.T, res *pb.UpdateUserResponse, err error)
	}{
		{
			name: "OK",
			req: &pb.UpdateUserRequest{
				Username: user.Username,
				FullName: &newName,
				Email:    &newEmail,
			},
			buildStubs: func(userService *mocksvc.MockUserService) {
				arg := service.UserUpdateRequest{
					Username: user.Username,
					FullName: &newName,
					Email:    &newEmail,
				}

				updatedUser := db.User{
					Username:       user.Username,
					HashedPassword: user.HashedPassword,
					FullName:       newName,
					Email:          newEmail,
				}

				userService.EXPECT().
					UpdateUser(gomock.Any(), gomock.Eq(arg)).
					Times(1).
					Return(&updatedUser, nil)
			},
			buildContext: func(t *testing.T, tokenMaker auth.Maker) context.Context {
				return newContextWithBearerToken(t, tokenMaker, user.Username, user.Role, time.Minute)
			},
			checkResponse: func(t *testing.T, res *pb.UpdateUserResponse, err error) {
				require.NoError(t, err)
				require.NotNil(t, res)
				updatedUser := res.GetUser()
				require.Equal(t, user.Username, updatedUser.Username)
				require.Equal(t, newName, updatedUser.FullName)
				require.Equal(t, newEmail, updatedUser.Email)
			},
		}, {
			name: "UserNotFound",
			req: &pb.UpdateUserRequest{
				Username: user.Username,
				FullName: &newName,
				Email:    &newEmail,
			},
			buildStubs: func(userService *mocksvc.MockUserService) {

				userService.EXPECT().
					UpdateUser(gomock.Any(), gomock.Any()).
					Times(1).
					Return(nil, db.ErrRecordNotFound)
			},
			buildContext: func(t *testing.T, tokenMaker auth.Maker) context.Context {
				return newContextWithBearerToken(t, tokenMaker, user.Username, user.Role, time.Minute)
			},
			checkResponse: func(t *testing.T, res *pb.UpdateUserResponse, err error) {
				require.Error(t, err)
				st, ok := status.FromError(err)
				require.True(t, ok)
				require.Equal(t, st.Code(), codes.NotFound)
			},
		}, {
			name: "ExpiredToken",
			req: &pb.UpdateUserRequest{
				Username: user.Username,
				FullName: &newName,
				Email:    &newEmail,
			},
			buildStubs: func(userService *mocksvc.MockUserService) {

				userService.EXPECT().
					UpdateUser(gomock.Any(), gomock.Any()).
					Times(0)
			},
			buildContext: func(t *testing.T, tokenMaker auth.Maker) context.Context {
				return newContextWithBearerToken(t, tokenMaker, user.Username, user.Role, -time.Minute)
			},
			checkResponse: func(t *testing.T, res *pb.UpdateUserResponse, err error) {
				require.Error(t, err)
				st, ok := status.FromError(err)
				require.True(t, ok)
				require.Equal(t, st.Code(), codes.Unauthenticated)
			},
		}, {
			name: "NoAuthorizationHeader",
			req: &pb.UpdateUserRequest{
				Username: user.Username,
				FullName: &newName,
				Email:    &newEmail,
			},
			buildStubs: func(userService *mocksvc.MockUserService) {

				userService.EXPECT().
					UpdateUser(gomock.Any(), gomock.Any()).
					Times(0)
			},
			buildContext: func(t *testing.T, tokenMaker auth.Maker) context.Context {
				return context.Background()
			},
			checkResponse: func(t *testing.T, res *pb.UpdateUserResponse, err error) {
				require.Error(t, err)
				st, ok := status.FromError(err)
				require.True(t, ok)
				require.Equal(t, st.Code(), codes.Unauthenticated)
			},
		}, {
			name: "InvalidEmail",
			req: &pb.UpdateUserRequest{
				Username: user.Username,
				FullName: &newName,
				Email:    &invalidEmail,
			},
			buildStubs: func(userService *mocksvc.MockUserService) {

				userService.EXPECT().
					UpdateUser(gomock.Any(), gomock.Any()).
					Times(0)
			},
			buildContext: func(t *testing.T, tokenMaker auth.Maker) context.Context {
				return newContextWithBearerToken(t, tokenMaker, user.Username, user.Role, time.Minute)
			},
			checkResponse: func(t *testing.T, res *pb.UpdateUserResponse, err error) {
				require.Error(t, err)
				st, ok := status.FromError(err)
				require.True(t, ok)
				require.Equal(t, st.Code(), codes.InvalidArgument)
			},
		},
	}

	for i := range testCases {
		tc := testCases[i]
		t.Run(tc.name, func(t *testing.T) {
			userCtrl := gomock.NewController(t)
			defer userCtrl.Finish()

			userService := mocksvc.NewMockUserService(userCtrl)

			tc.buildStubs(userService)

			// Start test server and send request
			s := newTestServer(t, nil, nil, userService, nil)

			ctx := tc.buildContext(t, s.tokenMaker)

			// Call UpdateUser RPC
			res, err := s.UpdateUser(ctx, tc.req)

			tc.checkResponse(t, res, err)
		})
	}
}