package main

import (
	"context"
	"encoding/json"
	"isle/daemon/daecommon"
	"isle/toolkit"
	"os"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"golang.org/x/exp/slices"
)

func TestVPNFirewallList(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name              string
		outbound, inbound []string
		staged            string
		flags             []string
		want              map[string][]any
		wantErr           string
	}{
		{
			name: "empty",
			want: map[string][]any{
				"outbound": {},
				"inbound":  {},
			},
		},
		{
			name: "single",
			outbound: []string{
				`{"port":"any","proto":"icmp","host":"any"}`,
			},
			want: map[string][]any{
				"outbound": {
					map[string]any{
						"index": 0,
						"port":  "any",
						"proto": "icmp",
						"host":  "any",
					},
				},
				"inbound": {},
			},
		},
		{
			name: "multiple",
			outbound: []string{
				`{"port":"any","proto":"icmp","host":"any"}`,
			},
			inbound: []string{
				`{"port":"any","proto":"icmp","host":"any"}`,
				`{"port":"22","proto":"tcp","host":"foo"}`,
			},
			want: map[string][]any{
				"outbound": {
					map[string]any{
						"index": 0,
						"port":  "any",
						"proto": "icmp",
						"host":  "any",
					},
				},
				"inbound": {
					map[string]any{
						"index": 0,
						"port":  "any",
						"proto": "icmp",
						"host":  "any",
					},
					map[string]any{
						"index": 1,
						"port":  "22",
						"proto": "tcp",
						"host":  "foo",
					},
				},
			},
		},
		{
			name:    "staged/nothing staged",
			flags:   []string{"--staged"},
			wantErr: "no firewall configuration changes have been staged",
		},
		{
			name: "staged/staged but no flag",
			outbound: []string{
				`{"port":"any","proto":"icmp","host":"any"}`,
			},
			staged: `{
				"Inbound": [
					{
						"Port":"80",
						"Proto":"tcp",
						"Host":"some-host"
					}
				]
			}`,
			want: map[string][]any{
				"outbound": {
					map[string]any{
						"index": 0,
						"port":  "any",
						"proto": "icmp",
						"host":  "any",
					},
				},
				"inbound": {},
			},
		},
		{
			name: "staged/staged with flag",
			outbound: []string{
				`{"port":"any","proto":"icmp","host":"any"}`,
			},
			staged: `{
				"Inbound": [
					{
						"Port":"80",
						"Proto":"tcp",
						"Host":"some-host"
					}
				]
			}`,
			flags: []string{"--staged"},
			want: map[string][]any{
				"outbound": {},
				"inbound": {
					map[string]any{
						"index": 0,
						"port":  "80",
						"proto": "tcp",
						"host":  "some-host",
					},
				},
			},
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			var (
				h      = newRunHarness(t)
				config daecommon.NetworkConfig

				outboundRawJSON = "[" + strings.Join(test.outbound, ",") + "]"
				inboundRawJSON  = "[" + strings.Join(test.inbound, ",") + "]"
			)

			if test.staged != "" {
				require.True(t, json.Valid([]byte(test.staged)))
				require.NoError(t, os.WriteFile(
					h.changeStager.path(vpnFirewallConfigChangeStagerName),
					[]byte(test.staged),
					0600,
				))
			}

			require.NoError(t, json.Unmarshal(
				[]byte(outboundRawJSON), &config.VPN.Firewall.Outbound,
			))

			require.NoError(t, json.Unmarshal(
				[]byte(inboundRawJSON), &config.VPN.Firewall.Inbound,
			))

			if !slices.Contains(test.flags, "--staged") {
				h.daemonRPC.
					On("GetConfig", toolkit.MockArg[context.Context]()).
					Return(config, nil).
					Once()
			}

			args := append([]string{"vpn", "firewall", "list"}, test.flags...)

			if test.wantErr == "" {
				h.runAssertStdout(t, test.want, args...)
			} else {
				err := h.run(t, args...)
				if assert.Error(t, err) {
					assert.Contains(t, err.Error(), test.wantErr)
				}
			}
		})
	}
}