// Copyright 2019 Yunion
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package rbacutils

import (
	"testing"

	"yunion.io/x/jsonutils"
	"yunion.io/x/pkg/util/netutils"
)

func TestSRabcRule_Match(t *testing.T) {
	all := SRbacRule{Service: "*", Resource: "*", Action: "*"}
	compute := SRbacRule{Service: "compute", Resource: "*", Action: "*"}
	getOnly := SRbacRule{Service: "*", Resource: "*", Action: "get"}
	listOnly := SRbacRule{Service: "*", Resource: "*", Action: "list"}
	serverList := SRbacRule{Service: "compute", Resource: "server", Action: "list"}
	serverPerform := SRbacRule{Service: "compute", Resource: "server", Action: "perform", Extra: []string{"*"}}

	rule_server_list := []string{"compute", "server", "list"}
	rule_server_perform_start := []string{"compute", "server", "perform", "start"}
	rule_server_create := []string{"compute", "server", "create"}

	cases := []struct {
		inRule  SRbacRule
		inMatch []string
		want    bool
		count   int
	}{
		{all, rule_server_list, true, 0},
		{all, rule_server_perform_start, true, 0},
		{all, rule_server_create, true, 0},
		{compute, rule_server_list, true, 1},
		{compute, rule_server_perform_start, true, 1},
		{compute, rule_server_create, true, 1},
		{getOnly, rule_server_list, false, 0},
		{getOnly, rule_server_perform_start, false, 0},
		{getOnly, rule_server_create, false, 0},
		{listOnly, rule_server_list, true, 1},
		{listOnly, rule_server_perform_start, false, 0},
		{listOnly, rule_server_create, false, 0},
		{serverList, rule_server_list, true, 3},
		{serverList, rule_server_perform_start, false, 0},
		{serverList, rule_server_create, false, 0},
		{serverPerform, rule_server_list, false, 0},
		{serverPerform, rule_server_perform_start, true, 3},
		{serverPerform, rule_server_create, false, 0},
	}

	for _, c := range cases {
		got, cnt, _ := c.inRule.match(c.inMatch[0], c.inMatch[1], c.inMatch[2], c.inMatch[3:]...)
		if got != c.want {
			t.Errorf("%#v %#v want %#v got %#v", c.inRule, c.inMatch, c.want, got)
		}
		if cnt != c.count {
			t.Errorf("%#v %#v want %#v got %#v", c.inRule, c.inMatch, c.count, cnt)
		}
	}
}

func TestContains(t *testing.T) {
	cases := []struct {
		left     SRbacRule
		right    SRbacRule
		contains bool
	}{
		{
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			true,
		},
		{
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "compute", Resource: "*", Action: "*", Result: Allow},
			true,
		},
		{
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "compute", Resource: "server", Action: "*", Result: Allow},
			true,
		},
		{
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "compute", Resource: "server", Action: "list", Result: Allow},
			true,
		},
		{
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "compute", Resource: "server", Action: "get", Extra: []string{"vnc"}, Result: Allow},
			true,
		},
		{
			SRbacRule{Service: "compute", Resource: "*", Action: "*", Result: Allow},
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			false,
		},
		{
			SRbacRule{Service: "compute", Resource: "server", Action: "*", Result: Allow},
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			false,
		},
		{
			SRbacRule{Service: "compute", Resource: "server", Action: "list", Result: Allow},
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			false,
		},
		{
			SRbacRule{Service: "compute", Resource: "server", Action: "get", Extra: []string{"vnc"}, Result: Allow},
			SRbacRule{Service: "*", Resource: "*", Action: "*", Result: Allow},
			false,
		},
	}

	for _, c := range cases {
		got := c.left.contains(&c.right)
		if got != c.contains {
			t.Errorf("%s contains %s want %#v got %#v", c.left, c.right, c.contains, got)
		}
	}
}

func TestSRabcPolicy_Encode(t *testing.T) {
	cases := []string{
		`{
        "condition": "tenant == \"system\" && roles.contains(\"projectowner\")",
        "is_admin": false,
        "policy": {
            "compute": {
				 "keypair": "allow",
				 "server": "deny",
                 "*": {
                      "*": "allow",
                      "create": "deny"
                 }
            },
			"meter": {
				 "*": "allow"
			}
        }
    }`,
		`{
		"auth": false,
		"ips": ["10.0.0.0/8", "192.168.222.171"],
		"projects": ["system"],
        "roles": ["projectowner","admin"],
        "scope": "domain",
        "policy": {
            "compute": {
				 "keypair": "allow",
				 "server": "deny",
                 "*": {
                      "*": "allow",
                      "create": "deny"
                 }
            },
			"meter": {
				 "*": "allow"
			}
        }
    }`,
		`{
		"auth": false,
        "scope": "domain",
        "policy": {
            "compute": {
				 "keypair": "allow",
				 "server": "deny",
                 "*": {
                      "*": "allow",
                      "create": "deny"
                 }
            },
			"meter": {
				 "*": "allow"
			}
        }
    }`,
	}
	for _, policyStr := range cases {
		policyJson, err := jsonutils.ParseString(policyStr)
		if err != nil {
			t.Errorf("fail to parse json string %s", err)
			return
		}

		policy := SRbacPolicy{}

		err = policy.Decode(policyJson)
		if err != nil {
			t.Errorf("decode error %s", err)
			return
		}

		policyJson1 := policy.Encode()

		policy2 := SRbacPolicy{}

		err = policy2.Decode(policyJson1)
		if err != nil {
			t.Errorf("decode error 2 %s", err)
			return
		}

		policyJson2 := policy2.Encode()

		policyStr1 := policyJson1.PrettyString()
		policyStr2 := policyJson2.PrettyString()

		if policyStr1 != policyStr2 {
			t.Errorf("%s != %s", policyStr1, policyStr2)
			return
		}

		t.Logf("%s", policyStr1)
	}
}

/*
func TestSRabcPolicy_Explain(t *testing.T) {
	policyStr := `{
        "condition": "usercred.project != \"system\" && usercred.roles==\"projectowner\"",
        "is_admin": false,
        "policy": {
            "compute": {
				 "keypair": "allow",
				 "server": "deny",
                 "*": {
                      "*": "allow",
                      "create": "deny"
                 }
            },
			"meter": {
				 "*": "allow"
			},
			"k8s": "allow"
        }
    }`
	policyJson, err := jsonutils.ParseString(policyStr)
	if err != nil {
		t.Errorf("fail to parse json string %s", err)
		return
	}

	policy := SRbacPolicy{}

	err = policy.Decode(policyJson)
	if err != nil {
		t.Errorf("decode error %s", err)
		return
	}

	request := [][]string{
		{"compute", "keypair", "list"},
		{"compute", "server", "list"},
		{"compute", "server", "get", "vnc"},
		{"compute", "keypair", "create"},
		{"meter", "price", "list"},
		{"image", "image", "list"},
		{"k8s", "pod", "list"},
	}

	output := policy.Explain(request)

	t.Logf("%#v", output)
}
*/

func TestConditionParser(t *testing.T) {
	condition := `tenant=="system" && roles.contains("admin")`
	tenants := searchMatchTenants(condition)
	t.Logf("%s", tenants)
	roles := searchMatchRoles(condition)
	t.Logf("%s", roles)
}

func TestSRbacPolicyMatch(t *testing.T) {
	prefix, _ := netutils.NewIPV4Prefix("10.168.22.0/24")
	cases := []struct {
		policy   SRbacPolicy
		userCred IRbacIdentity2
		want     bool
	}{
		{
			SRbacPolicy{},
			newRbacIdentity2("", "", nil, ""),
			true,
		},
		{
			SRbacPolicy{},
			nil,
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
			},
			newRbacIdentity2("", "system", nil, ""),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
			},
			newRbacIdentity2("", "demo", nil, ""),
			false,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
			},
			newRbacIdentity2("", "system", []string{"admin"}, ""),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
			},
			newRbacIdentity2("", "system", []string{"admin", "_member_"}, ""),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
			},
			newRbacIdentity2("", "system", []string{"_member_"}, ""),
			false,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
			},
			nil,
			false,
		},
		{
			SRbacPolicy{
				Auth: false,
			},
			nil,
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
				Ips:      []netutils.IPV4Prefix{prefix},
			},
			newRbacIdentity2("", "system", []string{"admin"}, "10.0.0.23"),
			false,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
				Ips:      []netutils.IPV4Prefix{prefix},
			},
			newRbacIdentity2("", "system", []string{"admin"}, "10.168.22.23"),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin"},
				Ips:      []netutils.IPV4Prefix{prefix},
			},
			newRbacIdentity2("", "system", []string{"_member_"}, "10.168.22.23"),
			false,
		},
		{
			SRbacPolicy{
				Roles: []string{"admin"},
				Ips:   []netutils.IPV4Prefix{prefix},
			},
			newRbacIdentity2("", "system", []string{"_member_", "admin"}, "10.168.22.23"),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{"system"},
				Roles:    []string{"admin", "_member_"},
				Ips:      []netutils.IPV4Prefix{prefix},
			},
			newRbacIdentity2("", "system", []string{"_member_", "projectowner"}, "10.168.22.23"),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{},
				Roles:    []string{"domain_admin"},
				Auth:     true,
			},
			newRbacIdentity2("", "ldapproj", []string{"domain_admin"}, ""),
			true,
		},
		{
			SRbacPolicy{
				Projects: []string{},
				Roles:    []string{"admin"},
				Auth:     true,
			},
			newRbacIdentity2("", "", []string{"admin"}, ""),
			true,
		},
	}
	for i, c := range cases {
		got, _ := c.policy.Match(c.userCred)
		if got != c.want {
			t.Errorf("[%d]: %#v %#v got %v want %v", i, c.policy, c.userCred, got, c.want)
		}
	}
}

func TestGetMatchRules(t *testing.T) {
	cases := []struct {
		rules    []SRbacRule
		service  string
		resource string
		action   string
		want     bool
	}{
		{
			[]SRbacRule{
				{
					Service:  "yunionconf",
					Resource: "parameters",
					Action:   "list",
					Result:   Allow,
				},
			},
			"yunionconf",
			"parameters",
			"list",
			true,
		},
	}
	for _, c := range cases {
		rule := GetMatchRule(c.rules, c.service, c.resource, c.action)
		got := rule != nil
		if got != c.want {
			t.Errorf("want %v got %v", c.want, got)
		}
	}
}