package app

import (
	egressutilpkg "selective-vpn-api/app/egressutil"
	"testing"
)

func TestParseEgressScope(t *testing.T) {
	tests := []struct {
		name   string
		in     string
		wantOK bool
		want   egressScopeTarget
	}{
		{
			name:   "adguardvpn",
			in:     "adguardvpn",
			wantOK: true,
			want: egressScopeTarget{
				Scope:  "adguardvpn",
				Source: "adguardvpn",
			},
		},
		{
			name:   "system",
			in:     "system",
			wantOK: true,
			want: egressScopeTarget{
				Scope:  "system",
				Source: "system",
			},
		},
		{
			name:   "transport normalize",
			in:     "transport: SG RealNetns ",
			wantOK: true,
			want: egressScopeTarget{
				Scope:    "transport:sg-realnetns",
				Source:   "transport",
				SourceID: "sg-realnetns",
			},
		},
		{
			name:   "bad scope",
			in:     "transport:",
			wantOK: false,
		},
	}

	for _, tc := range tests {
		tc := tc
		t.Run(tc.name, func(t *testing.T) {
			got, err := parseEgressScope(tc.in)
			if tc.wantOK && err != nil {
				t.Fatalf("parseEgressScope(%q) unexpected error: %v", tc.in, err)
			}
			if !tc.wantOK {
				if err == nil {
					t.Fatalf("parseEgressScope(%q) expected error", tc.in)
				}
				return
			}
			if got != tc.want {
				t.Fatalf("parseEgressScope(%q)=%+v want %+v", tc.in, got, tc.want)
			}
		})
	}
}

func TestParseEgressIPFromBody(t *testing.T) {
	tests := []struct {
		name   string
		in     string
		wantIP string
		wantOK bool
	}{
		{
			name:   "plain ipv4",
			in:     "203.0.113.10\n",
			wantIP: "203.0.113.10",
			wantOK: true,
		},
		{
			name:   "json ip",
			in:     `{"ip":"198.51.100.7"}`,
			wantIP: "198.51.100.7",
			wantOK: true,
		},
		{
			name:   "json query",
			in:     `{"query":"2001:db8::1"}`,
			wantIP: "2001:db8::1",
			wantOK: true,
		},
		{
			name:   "invalid",
			in:     "not-an-ip",
			wantOK: false,
		},
	}

	for _, tc := range tests {
		tc := tc
		t.Run(tc.name, func(t *testing.T) {
			got, err := egressutilpkg.ParseIPFromBody(tc.in)
			if tc.wantOK && err != nil {
				t.Fatalf("ParseIPFromBody unexpected error: %v", err)
			}
			if !tc.wantOK {
				if err == nil {
					t.Fatalf("ParseIPFromBody expected error")
				}
				return
			}
			if got != tc.wantIP {
				t.Fatalf("ParseIPFromBody=%q want %q", got, tc.wantIP)
			}
		})
	}
}

func TestEgressParseGeoResponse(t *testing.T) {
	code, name, err := egressutilpkg.ParseGeoResponse(`{"success":true,"country":"Singapore","country_code":"SG"}`)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if code != "SG" || name != "Singapore" {
		t.Fatalf("unexpected geo parse result: code=%q name=%q", code, name)
	}

	code, name, err = egressutilpkg.ParseGeoResponse(`{"status":"success","country":"Netherlands","countryCode":"NL"}`)
	if err != nil {
		t.Fatalf("unexpected ip-api error: %v", err)
	}
	if code != "NL" || name != "Netherlands" {
		t.Fatalf("unexpected ip-api geo parse result: code=%q name=%q", code, name)
	}

	if _, _, err := egressutilpkg.ParseGeoResponse(`{"status":"fail","message":"private range"}`); err == nil {
		t.Fatalf("expected geo parse error for fail status")
	}
}

func TestNormalizeCountryCode(t *testing.T) {
	if got := egressutilpkg.NormalizeCountryCode("sg"); got != "SG" {
		t.Fatalf("NormalizeCountryCode(sg)=%q", got)
	}
	if got := egressutilpkg.NormalizeCountryCode("123"); got != "" {
		t.Fatalf("NormalizeCountryCode(123) should be empty, got=%q", got)
	}
}

func TestEgressResolvedHostForURL(t *testing.T) {
	host, port, ip := egressutilpkg.ResolvedHostForURL("https://127.0.0.1/ip")
	if host != "" || port != 0 || ip != "" {
		t.Fatalf("expected empty resolve tuple for literal IP, got host=%q port=%d ip=%q", host, port, ip)
	}
}

func TestEgressParseSingBoxSOCKSProxyURL(t *testing.T) {
	root := map[string]any{
		"inbounds": []any{
			map[string]any{
				"type":        "socks",
				"listen":      "127.0.0.1",
				"listen_port": 2080,
			},
		},
	}
	got := egressutilpkg.ParseSingBoxSOCKSProxyURL(root)
	if got != "socks5h://127.0.0.1:2080" {
		t.Fatalf("unexpected proxy url: %q", got)
	}

	root2 := map[string]any{
		"inbounds": []any{
			map[string]any{
				"type":        "mixed",
				"listen":      "0.0.0.0",
				"listen_port": float64(1080),
			},
		},
	}
	got2 := egressutilpkg.ParseSingBoxSOCKSProxyURL(root2)
	if got2 != "socks5h://127.0.0.1:1080" {
		t.Fatalf("unexpected mixed proxy url: %q", got2)
	}
}