//go:build standalone

package checker

import (
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
)

func formRequest(values url.Values) *httptest.ResponseRecorder {
	_ = values
	return httptest.NewRecorder()
}

func TestRenderForm_HasAllFields(t *testing.T) {
	fields := (&smtpProvider{}).RenderForm()
	got := map[string]bool{}
	for _, f := range fields {
		got[f.Id] = true
	}
	for _, want := range []string{"domain", "helo_name", "timeout", "test_null_sender", "test_postmaster", "test_open_relay", "test_probe_address"} {
		if !got[want] {
			t.Errorf("missing field %q", want)
		}
	}
}

func TestParseForm_Defaults(t *testing.T) {
	v := url.Values{"domain": {"example.com"}}
	r := httptest.NewRequest("POST", "/", strings.NewReader(v.Encode()))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	opts, err := (&smtpProvider{}).ParseForm(r)
	if err != nil {
		t.Fatalf("ParseForm: %v", err)
	}
	if opts["domain"] != "example.com" {
		t.Errorf("domain: %v", opts["domain"])
	}
	// Submitted form with no checkbox checks → false (per parseBool sentinel).
	if opts["test_null_sender"].(bool) {
		t.Error("expected test_null_sender=false on submitted form without checkbox")
	}
}

func TestParseForm_TrimsAndStripsTrailingDot(t *testing.T) {
	v := url.Values{"domain": {"  example.com.  "}}
	r := httptest.NewRequest("POST", "/", strings.NewReader(v.Encode()))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	opts, err := (&smtpProvider{}).ParseForm(r)
	if err != nil {
		t.Fatalf("ParseForm: %v", err)
	}
	if opts["domain"] != "example.com" {
		t.Errorf("expected normalized domain, got %v", opts["domain"])
	}
}

func TestParseForm_RejectsEmptyDomain(t *testing.T) {
	r := httptest.NewRequest("POST", "/", strings.NewReader(""))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	if _, err := (&smtpProvider{}).ParseForm(r); err == nil {
		t.Fatal("expected error on empty domain")
	}
}

func TestParseForm_RejectsNonNumericTimeout(t *testing.T) {
	v := url.Values{"domain": {"example.com"}, "timeout": {"banana"}}
	r := httptest.NewRequest("POST", "/", strings.NewReader(v.Encode()))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	if _, err := (&smtpProvider{}).ParseForm(r); err == nil {
		t.Fatal("expected error on non-numeric timeout")
	}
}

func TestParseForm_PassesThroughCheckboxes(t *testing.T) {
	v := url.Values{
		"domain":             {"example.com"},
		"timeout":            {"5"},
		"helo_name":          {"mx-checker.example.com"},
		"test_null_sender":   {"on"},
		"test_postmaster":    {"true"},
		"test_open_relay":    {"yes"},
		"test_probe_address": {"postmaster@example.org"},
	}
	r := httptest.NewRequest("POST", "/", strings.NewReader(v.Encode()))
	r.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	opts, err := (&smtpProvider{}).ParseForm(r)
	if err != nil {
		t.Fatalf("ParseForm: %v", err)
	}
	if opts["timeout"].(float64) != 5 {
		t.Errorf("timeout: %v", opts["timeout"])
	}
	if !opts["test_null_sender"].(bool) || !opts["test_postmaster"].(bool) || !opts["test_open_relay"].(bool) {
		t.Errorf("checkboxes: %+v", opts)
	}
	if opts["helo_name"] != "mx-checker.example.com" {
		t.Errorf("helo_name: %v", opts["helo_name"])
	}
	if opts["test_probe_address"] != "postmaster@example.org" {
		t.Errorf("probe addr: %v", opts["test_probe_address"])
	}
}

func TestParseBool_DefaultWhenNotSubmitted(t *testing.T) {
	r := httptest.NewRequest("GET", "/?", nil)
	if err := r.ParseForm(); err != nil {
		t.Fatalf("ParseForm: %v", err)
	}
	if !parseBool(r, "feature", true) {
		t.Error("missing key on non-submitted form should yield default")
	}
}

func TestParseBool_FalsyValues(t *testing.T) {
	cases := []string{"0", "false", "off", "no", "FALSE"}
	for _, c := range cases {
		r := httptest.NewRequest("GET", "/?domain=x&feature="+c, nil)
		if err := r.ParseForm(); err != nil {
			t.Fatalf("parse: %v", err)
		}
		if parseBool(r, "feature", true) {
			t.Errorf("value %q should be false", c)
		}
	}
}