package policyhandler

import (
	"errors"
	"fmt"
	"os"
	"testing"
	"time"

	"github.com/kubescape/kubescape/v3/core/cautils"
	"github.com/kubescape/opa-utils/reporthandling"
	"github.com/stretchr/testify/assert"
)

func Test_validateFramework(t *testing.T) {
	type args struct {
		framework *reporthandling.Framework
	}
	tests := []struct {
		args    args
		name    string
		wantErr bool
	}{
		{
			name: "nil framework",
			args: args{
				framework: nil,
			},
			wantErr: true,
		},
		{
			name: "empty framework",
			args: args{
				framework: &reporthandling.Framework{
					Controls: []reporthandling.Control{},
				},
			},
			wantErr: true,
		},
		{
			name: "none empty framework",
			args: args{
				framework: &reporthandling.Framework{
					Controls: []reporthandling.Control{
						{
							ControlID: "c-0001",
						},
					},
				},
			},
			wantErr: false,
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if err := validateFramework(tt.args.framework); (err != nil) != tt.wantErr {
				t.Errorf("validateControls() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

func TestGetScanKind(t *testing.T) {
	tests := []struct {
		policyIdentifier []cautils.PolicyIdentifier
		want             string
	}{
		{
			policyIdentifier: []cautils.PolicyIdentifier{
				{Kind: "ClusterAdmissionRule", Identifier: "policy1"},
				{Kind: "K8sPSP", Identifier: "policy2"},
			},
			want: "ClusterAdmissionRule",
		},
		{
			policyIdentifier: []cautils.PolicyIdentifier{},
			want:             "unknown",
		},
	}

	for _, tt := range tests {
		t.Run(tt.want, func(t *testing.T) {
			assert.Equal(t, tt.want, string(getScanKind(tt.policyIdentifier)))
		})
	}
}

func TestPolicyDownloadError(t *testing.T) {
	tests := []struct {
		err  error
		want error
		name string
		kind string
	}{
		{
			err:  errors.New("Some error"),
			want: errors.New("Some error"),
		},
		{
			err:  errors.New("unsupported protocol scheme"),
			want: fmt.Errorf("failed to download from GitHub release, try running with `--use-default` flag"),
		},
		{
			err:  errors.New("framework 'cis' not found"),
			want: fmt.Errorf("framework 'cis' not found, run `kubescape list frameworks` for available frameworks"),
			name: "cis",
			kind: "framework",
		},
		{
			err:  errors.New("control 'c-0005' not found"),
			want: fmt.Errorf("control 'c-0005' not found, run `kubescape list controls` for available controls"),
			name: "c-0005",
			kind: "control",
		},
	}

	for _, tt := range tests {
		t.Run("", func(t *testing.T) {
			switch tt.kind {
			case "framework":
				assert.Equal(t, tt.want, frameworkDownloadError(tt.err, tt.name))
			case "control":
				assert.Equal(t, tt.want, controlDownloadError(tt.err, tt.name))
			default:
				assert.Equal(t, tt.want, frameworkDownloadError(tt.err, tt.name))
				assert.Equal(t, tt.want, controlDownloadError(tt.err, tt.name))
			}
		})
	}
}

// Returns a time.Duration value when PoliciesCacheTtlEnvVar is set and valid.
func TestGetPoliciesCacheTtl_Set(t *testing.T) {
	tests := []struct {
		envVarValue string
		want        time.Duration
	}{
		{
			envVarValue: "10",
			want:        time.Duration(10) * time.Minute,
		},
		{
			envVarValue: "0",
			want:        time.Duration(0),
		},
		{
			envVarValue: "text",
			want:        time.Duration(0),
		},
	}

	for _, tt := range tests {
		t.Run("", func(t *testing.T) {
			os.Setenv(PoliciesCacheTtlEnvVar, tt.envVarValue)
			defer os.Unsetenv(PoliciesCacheTtlEnvVar)

			assert.Equal(t, tt.want, getPoliciesCacheTtl())
		})
	}
}

// Returns 0 when PoliciesCacheTtlEnvVar is not set.
func TestGetPoliciesCacheTtl_NotSet(t *testing.T) {
	want := time.Duration(0)

	assert.Equal(t, want, getPoliciesCacheTtl())
}

func TestPolicyIdentifierToSlice(t *testing.T) {
	tests := []struct {
		policyIdentifier []cautils.PolicyIdentifier
		want             []string
	}{
		{
			policyIdentifier: []cautils.PolicyIdentifier{
				{Kind: "ClusterAdmissionRule", Identifier: "policy1"},
				{Kind: "K8sPSP", Identifier: "policy2"},
			},
			want: []string{"ClusterAdmissionRule: policy1", "K8sPSP: policy2"},
		},
		{
			policyIdentifier: []cautils.PolicyIdentifier{},
			want:             []string{},
		},
	}

	for _, tt := range tests {
		t.Run("", func(t *testing.T) {
			assert.Equal(t, tt.want, policyIdentifierToSlice(tt.policyIdentifier))
		})
	}
}