package engine

import (
	"testing"

	"git.frostfs.info/TrueCloudLab/policy-engine/pkg/chain"
	resourcetest "git.frostfs.info/TrueCloudLab/policy-engine/pkg/resource/testutil"
	"github.com/stretchr/testify/require"
)

func TestInmemory(t *testing.T) {
	const (
		object     = "native::object::abc/xyz"
		container  = "native::object::abc/*"
		namespace  = "Tenant1"
		namespace2 = "Tenant2"
		actor1     = "owner1"
		actor2     = "owner2"
	)

	s := NewInMemory()

	// Object which was put via S3.
	res := resourcetest.NewResource(object, map[string]string{"FromS3": "true"})
	// Request initiating from the trusted subnet and actor.
	reqGood := resourcetest.NewRequest("native::object::put", res, map[string]string{
		"SourceIP": "10.1.1.12",
		"Actor":    actor1,
	})

	status, ok := s.IsAllowed(chain.Ingress, namespace, reqGood)
	require.Equal(t, chain.NoRuleFound, status)
	require.False(t, ok)

	s.AddNameSpaceChain(chain.Ingress, namespace, &chain.Chain{
		Rules: []chain.Rule{
			{ // Restrict to remove ANY object from the namespace.
				Status:    chain.AccessDenied,
				Actions:   chain.Actions{Names: []string{"native::object::delete"}},
				Resources: chain.Resources{Names: []string{"native::object::*"}},
			},
			{ // Allow to put object only from the trusted subnet AND trusted actor, deny otherwise.
				Status:    chain.AccessDenied,
				Actions:   chain.Actions{Names: []string{"native::object::put"}},
				Resources: chain.Resources{Names: []string{"native::object::*"}},
				Any:       true,
				Condition: []chain.Condition{
					{
						Op:     chain.CondStringNotLike,
						Object: chain.ObjectRequest,
						Key:    "SourceIP",
						Value:  "10.1.1.*",
					},
					{
						Op:     chain.CondStringNotEquals,
						Object: chain.ObjectRequest,
						Key:    "Actor",
						Value:  actor1,
					},
				},
			},
		},
	})

	s.AddNameSpaceChain(chain.Ingress, namespace2, &chain.Chain{
		Rules: []chain.Rule{
			{ // Deny all expect "native::object::get" for all objects expect "native::object::abc/xyz".
				Status:    chain.AccessDenied,
				Actions:   chain.Actions{Inverted: true, Names: []string{"native::object::get"}},
				Resources: chain.Resources{Inverted: true, Names: []string{object}},
			},
		},
	})

	s.AddResourceChain(chain.Ingress, container, &chain.Chain{
		Rules: []chain.Rule{
			{ // Allow to actor2 to get objects from the specific container only if they have `Department=HR` attribute.
				Status:    chain.Allow,
				Actions:   chain.Actions{Names: []string{"native::object::get"}},
				Resources: chain.Resources{Names: []string{"native::object::abc/*"}},
				Condition: []chain.Condition{
					{
						Op:     chain.CondStringEquals,
						Object: chain.ObjectResource,
						Key:    "Department",
						Value:  "HR",
					},
					{
						Op:     chain.CondStringEquals,
						Object: chain.ObjectRequest,
						Key:    "Actor",
						Value:  actor2,
					},
				},
			},
		},
	})

	t.Run("bad subnet, namespace deny", func(t *testing.T) {
		// Request initiating from the untrusted subnet.
		reqBadIP := resourcetest.NewRequest("native::object::put", res, map[string]string{
			"SourceIP": "10.122.1.20",
			"Actor":    actor1,
		})
		status, ok := s.IsAllowed(chain.Ingress, namespace, reqBadIP)
		require.Equal(t, chain.AccessDenied, status)
		require.True(t, ok)
	})
	t.Run("bad actor, namespace deny", func(t *testing.T) {
		// Request initiating from the untrusted actor.
		reqBadActor := resourcetest.NewRequest("native::object::put", res, map[string]string{
			"SourceIP": "10.1.1.13",
			"Actor":    actor2,
		})
		status, ok := s.IsAllowed(chain.Ingress, namespace, reqBadActor)
		require.Equal(t, chain.AccessDenied, status)
		require.True(t, ok)
	})
	t.Run("bad object, container deny", func(t *testing.T) {
		objGood := resourcetest.NewResource("native::object::abc/id1", map[string]string{"Department": "HR"})
		objBadAttr := resourcetest.NewResource("native::object::abc/id2", map[string]string{"Department": "Support"})

		status, ok := s.IsAllowed(chain.Ingress, namespace, resourcetest.NewRequest("native::object::get", objGood, map[string]string{
			"SourceIP": "10.1.1.14",
			"Actor":    actor2,
		}))
		require.Equal(t, chain.Allow, status)
		require.True(t, ok)

		status, ok = s.IsAllowed(chain.Ingress, namespace, resourcetest.NewRequest("native::object::get", objBadAttr, map[string]string{
			"SourceIP": "10.1.1.14",
			"Actor":    actor2,
		}))
		require.Equal(t, chain.NoRuleFound, status)
		require.False(t, ok)
	})
	t.Run("bad operation, namespace deny", func(t *testing.T) {
		// Request with the forbidden operation.
		reqBadOperation := resourcetest.NewRequest("native::object::delete", res, map[string]string{
			"SourceIP": "10.1.1.12",
			"Actor":    actor1,
		})
		status, ok := s.IsAllowed(chain.Ingress, namespace, reqBadOperation)
		require.Equal(t, chain.AccessDenied, status)
		require.True(t, ok)
	})
	t.Run("inverted rules", func(t *testing.T) {
		req := resourcetest.NewRequest("native::object::put", resourcetest.NewResource(object, nil), nil)
		status, ok = s.IsAllowed(chain.Ingress, namespace2, req)
		require.Equal(t, chain.NoRuleFound, status)
		require.False(t, ok)

		req = resourcetest.NewRequest("native::object::put", resourcetest.NewResource("native::object::cba/def", nil), nil)
		status, ok = s.IsAllowed(chain.Ingress, namespace2, req)
		require.Equal(t, chain.AccessDenied, status)
		require.True(t, ok)

		req = resourcetest.NewRequest("native::object::get", resourcetest.NewResource("native::object::cba/def", nil), nil)
		status, ok = s.IsAllowed(chain.Ingress, namespace2, req)
		require.Equal(t, chain.NoRuleFound, status)
		require.False(t, ok)
	})
	t.Run("good", func(t *testing.T) {
		status, ok = s.IsAllowed(chain.Ingress, namespace, reqGood)
		require.Equal(t, chain.NoRuleFound, status)
		require.False(t, ok)

		t.Run("quota on a different container", func(t *testing.T) {
			s.AddOverride(chain.Ingress, &chain.Chain{
				Rules: []chain.Rule{{
					Status:    chain.QuotaLimitReached,
					Actions:   chain.Actions{Names: []string{"native::object::put"}},
					Resources: chain.Resources{Names: []string{"native::object::cba/*"}},
				}},
			})

			status, ok = s.IsAllowed(chain.Ingress, namespace, reqGood)
			require.Equal(t, chain.NoRuleFound, status)
			require.False(t, ok)
		})
		t.Run("quota on the request container", func(t *testing.T) {
			s.AddOverride(chain.Ingress, &chain.Chain{
				Rules: []chain.Rule{{
					Status:    chain.QuotaLimitReached,
					Actions:   chain.Actions{Names: []string{"native::object::put"}},
					Resources: chain.Resources{Names: []string{"native::object::abc/*"}},
				}},
			})

			status, ok = s.IsAllowed(chain.Ingress, namespace, reqGood)
			require.Equal(t, chain.QuotaLimitReached, status)
			require.True(t, ok)
		})
	})
}