// SPDX-FileCopyrightText: 2021 The NGI Pointer Secure-Scuttlebutt Team of 2020/2021
//
// SPDX-License-Identifier: MIT

package sqlite

import (
	"bytes"
	"context"
	"encoding/base64"
	"math/rand"
	"os"
	"path/filepath"
	"testing"
	"time"

	"github.com/stretchr/testify/require"

	refs "github.com/ssbc/go-ssb-refs"
	"github.com/ssbc/go-ssb-room/v2/internal/repo"
	"github.com/ssbc/go-ssb-room/v2/roomdb"
)

func TestInvites(t *testing.T) {
	ctx := context.Background()

	testRepo := filepath.Join("testrun", t.Name())
	os.RemoveAll(testRepo)
	tr := repo.New(testRepo)

	// fake feed for testing, looks ok at least
	newMember, err := refs.NewFeedRefFromBytes(bytes.Repeat([]byte("acab"), 8), refs.RefAlgoFeedSSB1)
	if err != nil {
		t.Error(err)
	}

	db, err := Open(tr)
	require.NoError(t, err)

	t.Run("try to consume invalid token", func(t *testing.T) {
		r := require.New(t)

		lst, err := db.Invites.List(ctx)
		r.NoError(err, "failed to get empty list of tokens")
		r.Len(lst, 0, "expected no active invites")

		randToken := make([]byte, 32)
		rand.Read(randToken)

		_, err = db.Invites.Consume(ctx, string(randToken), newMember)
		r.Error(err, "expected error for inactive invite")
	})

	t.Run("user needs to exist", func(t *testing.T) {
		r := require.New(t)

		_, err := db.Invites.Create(ctx, 666)
		r.Error(err, "can't create invite for invalid user")
	})

	invitingMember, err := refs.NewFeedRefFromBytes(bytes.Repeat([]byte("ohai"), 8), refs.RefAlgoFeedSSB1)
	if err != nil {
		t.Error(err)
	}
	mid, err := db.Members.Add(ctx, invitingMember, roomdb.RoleModerator)
	require.NoError(t, err, "failed to create test user")

	aliasString := "alias"

	err = db.Aliases.Register(ctx, aliasString, invitingMember, []byte("signature"))
	require.NoError(t, err, "failed to create an alias for the test user")

	t.Run("simple create and consume", func(t *testing.T) {
		r := require.New(t)

		// i really don't want to do a mocked time functions and rather solve the comment in migration 6 instead
		before := time.Now()

		tok, err := db.Invites.Create(ctx, mid)
		r.NoError(err, "failed to create invite token")

		_, err = base64.URLEncoding.DecodeString(tok)
		r.NoError(err, "not a valid base64 string")

		lst, err := db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens")
		r.Len(lst, 1, "expected 1 invite")

		r.True(lst[0].CreatedAt.After(before), "expected CreatedAt to be after the start marker")
		r.NotEmpty(lst[0].CreatedBy.Aliases, "expected aliases of the user to be populated")
		r.Equal(aliasString, lst[0].CreatedBy.Aliases[0].Name, "alias name should be populated")

		_, nope := db.Members.GetByFeed(ctx, newMember)
		r.Error(nope, "expected feed to not yet be on the allow list")

		gotInv, err := db.Invites.GetByToken(ctx, tok)
		r.NoError(err)
		r.Equal(lst[0].ID, gotInv.ID)

		inv, err := db.Invites.Consume(ctx, tok, newMember)
		r.NoError(err, "failed to consume the invite")
		r.NotEqualValues(0, inv.ID, "invite ID unset")
		r.True(inv.CreatedAt.After(before), "expected CreatedAt to be after the start marker")

		// consume also adds it to the allow list
		_, yes := db.Members.GetByFeed(ctx, newMember)
		r.NoError(yes, "expected feed on the allow list")

		lst, err = db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens post consume")
		r.Len(lst, 0, "expected no active invites")

		// can't use twice
		_, err = db.Invites.Consume(ctx, tok, newMember)
		r.Error(err, "failed to consume the invite")

	})

	t.Run("simple create but revoke before use", func(t *testing.T) {
		r := require.New(t)

		tok, err := db.Invites.Create(ctx, mid)
		r.NoError(err, "failed to create invite token")

		lst, err := db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens")
		r.Len(lst, 1, "expected 1 invite")

		err = db.Invites.Revoke(ctx, lst[0].ID)
		r.NoError(err, "failed to consume the invite")

		lst, err = db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens post consume")
		r.Len(lst, 0, "expected no active invites")

		// can't use twice
		_, err = db.Invites.Consume(ctx, tok, newMember)
		r.Error(err, "failed to consume the invite")
	})

	t.Run("invite member again", func(t *testing.T) {
		r := require.New(t)

		tok, err := db.Invites.Create(ctx, mid)
		r.NoError(err, "failed to create invite token")

		lst, err := db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens")
		r.Len(lst, 1, "expected 1 invite")

		_, err = db.Invites.Consume(ctx, tok, newMember)
		r.NoError(err, "failed to consume the invite")

		lst, err = db.Invites.List(ctx)
		r.NoError(err, "failed to get list of tokens post consume")
		r.Len(lst, 0, "expected no active invites")
	})
}