package app

import (
	"strings"
	"testing"
)

func TestValidateKolDisplayName(t *testing.T) {
	cases := []struct {
		name    string
		input   string
		wantOK  bool
		wantVal string
	}{
		{"trim spaces", "  alice  ", true, "alice"},
		{"keep unicode", "张小明", true, "张小明"},
		{"empty rejected", "   ", false, ""},
		{"40 chars ok", strings.Repeat("a", 40), true, strings.Repeat("a", 40)},
		{"41 chars rejected", strings.Repeat("a", 41), false, ""},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got, err := validateKolDisplayName(tc.input)
			if tc.wantOK && err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if !tc.wantOK && err == nil {
				t.Fatalf("expected error, got nil (value=%q)", got)
			}
			if tc.wantOK && got != tc.wantVal {
				t.Fatalf("got %q want %q", got, tc.wantVal)
			}
		})
	}
}

func TestValidateKolBio(t *testing.T) {
	cases := []struct {
		name   string
		input  *string
		wantOK bool
	}{
		{"nil ok", nil, true},
		{"empty trimmed to nil", strPtr("   "), true},
		{"500 chars ok", strPtr(strings.Repeat("b", 500)), true},
		{"501 chars rejected", strPtr(strings.Repeat("b", 501)), false},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			_, err := validateKolBio(tc.input)
			if tc.wantOK && err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if !tc.wantOK && err == nil {
				t.Fatalf("expected error, got nil")
			}
		})
	}
}

func TestValidateKolAvatarURL(t *testing.T) {
	cases := []struct {
		name   string
		input  *string
		wantOK bool
	}{
		{"nil ok", nil, true},
		{"empty trimmed to nil", strPtr("   "), true},
		{"asset path ok", strPtr("/api/public/assets/abc.def"), true},
		{"external url rejected", strPtr("https://evil.example.com/a.jpg"), false},
		{"javascript scheme rejected", strPtr("javascript:alert(1)"), false},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			_, err := validateKolAvatarURL(tc.input)
			if tc.wantOK && err != nil {
				t.Fatalf("unexpected error: %v", err)
			}
			if !tc.wantOK && err == nil {
				t.Fatalf("expected error, got nil")
			}
		})
	}
}

func strPtr(s string) *string { return &s }