package organization

import (
	"context"
	"errors"
	"testing"

	"git.sendico.io/tech/sxchnge/bff/pkg/auth"
	"git.sendico.io/tech/sxchnge/bff/pkg/db/repository/builder"
	"git.sendico.io/tech/sxchnge/bff/pkg/db/storable"
	"git.sendico.io/tech/sxchnge/bff/pkg/db/template"
	"git.sendico.io/tech/sxchnge/bff/pkg/merrors"
	"git.sendico.io/tech/sxchnge/bff/pkg/model"
	"git.sendico.io/tech/sxchnge/bff/pkg/mservice"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.mongodb.org/mongo-driver/v2/bson"
	"go.uber.org/zap"
)

// membershipTestRepository shadows FindOneByFilter with a members-aware implementation.
// When findErr is set, FindOneByFilter returns it immediately.
type membershipTestRepository struct {
	*memoryOrganizationRepository
	findErr error
}

func (r *membershipTestRepository) FindOneByFilter(_ context.Context, query builder.Query, result storable.Storable) error {
	if r.findErr != nil {
		return r.findErr
	}
	r.mu.RLock()
	defer r.mu.RUnlock()
	for _, id := range r.order {
		if org, ok := r.data[id]; ok && memberMatchesQuery(query, org) {
			dst, ok := result.(*model.Organization)
			if !ok {
				return merrors.InvalidDataType("expected organization result")
			}
			*dst = *cloneOrganization(org)
			return nil
		}
	}
	return merrors.ErrNoData
}

func memberMatchesQuery(query builder.Query, org *model.Organization) bool {
	if query == nil {
		return true
	}
	for _, elem := range query.BuildQuery() {
		switch elem.Key {
		case storable.IDField:
			id, ok := elem.Value.(bson.ObjectID)
			if !ok || *org.GetID() != id {
				return false
			}
		case "members":
			cond, ok := elem.Value.(bson.M)
			if !ok {
				return false
			}
			ref, ok := cond[string(builder.Eq)].(bson.ObjectID)
			if !ok {
				return false
			}
			found := false
			for _, m := range org.Members {
				if m == ref {
					found = true
					break
				}
			}
			if !found {
				return false
			}
		}
	}
	return true
}

func newMemberTestDB(t *testing.T, findErr error) *OrganizationDB {
	t.Helper()
	repo := &membershipTestRepository{
		memoryOrganizationRepository: newMemoryOrganizationRepository(),
		findErr:                      findErr,
	}
	dbImp := &template.DBImp[*model.Organization]{
		Logger:     zap.NewNop(),
		Repository: repo,
	}
	dbImp.SetDeleter(func(ctx context.Context, objectRef bson.ObjectID) error {
		return repo.Delete(ctx, objectRef)
	})
	return &OrganizationDB{
		ProtectedDBImp: auth.ProtectedDBImp[*model.Organization]{
			DBImp:         dbImp,
			Enforcer:      allowAllEnforcer{},
			PermissionRef: bson.NewObjectID(),
			Collection:    mservice.Organizations,
		},
	}
}

func TestOrganizationDB_IsMember_Member(t *testing.T) {
	ctx := context.Background()
	db := newMemberTestDB(t, nil)
	callerRef := bson.NewObjectID()

	org := &model.Organization{}
	org.SetID(bson.NewObjectID())
	org.Members = []bson.ObjectID{callerRef}
	require.NoError(t, db.Create(ctx, bson.NewObjectID(), *org.GetID(), org))

	ok, err := db.IsMember(ctx, *org.GetID(), callerRef)
	require.NoError(t, err)
	assert.True(t, ok)
}

func TestOrganizationDB_IsMember_NonMember(t *testing.T) {
	ctx := context.Background()
	db := newMemberTestDB(t, nil)
	callerRef := bson.NewObjectID()
	otherRef := bson.NewObjectID()

	org := &model.Organization{}
	org.SetID(bson.NewObjectID())
	org.Members = []bson.ObjectID{otherRef}
	require.NoError(t, db.Create(ctx, bson.NewObjectID(), *org.GetID(), org))

	ok, err := db.IsMember(ctx, *org.GetID(), callerRef)
	require.NoError(t, err)
	assert.False(t, ok)
}

func TestOrganizationDB_IsMember_OrgNotFound(t *testing.T) {
	ctx := context.Background()
	db := newMemberTestDB(t, nil)

	ok, err := db.IsMember(ctx, bson.NewObjectID(), bson.NewObjectID())
	require.NoError(t, err)
	assert.False(t, ok)
}

func TestOrganizationDB_IsMember_DBError(t *testing.T) {
	ctx := context.Background()
	boom := merrors.Internal("backend down")
	db := newMemberTestDB(t, boom)

	ok, err := db.IsMember(ctx, bson.NewObjectID(), bson.NewObjectID())
	assert.False(t, ok)
	assert.True(t, errors.Is(err, boom))
}