package httpapi

import (
	"bytes"
	"encoding/json"
	"strings"
	"testing"
	"time"

	"calllinesystem/server/internal/model"
	"calllinesystem/server/internal/security"
)

func TestAuthorizedTicketDTOsContainDecryptedPersonalFields(t *testing.T) {
	server, ticket := encryptedTicketFixture(t)

	staffView, err := server.staffTicketView(ticket)
	if err != nil {
		t.Fatal(err)
	}
	assertPersonalTicketView(t, staffView, "+8613812345678", "林", "女士")
	batchView, err := server.staffCallBatchView(model.CallBatch{ID: "batch-a"}, []model.QueueTicket{ticket})
	if err != nil {
		t.Fatal(err)
	}
	batchTickets, ok := batchView["tickets"].([]map[string]any)
	if !ok || len(batchTickets) != 1 {
		t.Fatalf("staff current batch tickets = %#v, want one ticket", batchView["tickets"])
	}
	assertPersonalTicketView(t, batchTickets[0], "+8613812345678", "林", "女士")

	adminView, err := server.adminActiveTicketView(ticket, "云岭漂流")
	if err != nil {
		t.Fatal(err)
	}
	assertPersonalTicketView(t, adminView, "+8613812345678", "林", "女士")
	if got := adminView["project_name"]; got != "云岭漂流" {
		t.Fatalf("admin project_name = %v, want 云岭漂流", got)
	}

	body, err := json.Marshal(map[string]any{"staff": staffView, "admin": adminView})
	if err != nil {
		t.Fatal(err)
	}
	encoded := string(body)
	for _, forbidden := range []string{"phone_ciphertext", "phone_nonce", "phone_hmac", "last_name_ciphertext", "last_name_nonce"} {
		if strings.Contains(encoded, forbidden) {
			t.Fatalf("authorized DTO leaked storage field %q: %s", forbidden, encoded)
		}
	}
}

func TestPhoneLast4ReturnsOnlyFinalFourDigits(t *testing.T) {
	server, ticket := encryptedTicketFixture(t)
	got, err := server.ticketPhoneLast4(ticket)
	if err != nil {
		t.Fatal(err)
	}
	if got != "5678" {
		t.Fatalf("encrypted ticket phone_last4 = %q, want 5678", got)
	}

	for _, test := range []struct {
		phone string
		want  string
	}{
		{phone: "+8613812345678", want: "5678"},
		{phone: "(138) 1234-0099", want: "0099"},
	} {
		got, err := phoneLast4(test.phone)
		if err != nil {
			t.Fatalf("phoneLast4(%q): %v", test.phone, err)
		}
		if got != test.want {
			t.Fatalf("phoneLast4(%q) = %q, want %q", test.phone, got, test.want)
		}
	}

	if _, err := phoneLast4("123"); err == nil {
		t.Fatal("phoneLast4 should reject fewer than four digits")
	}
}

func TestPurgedTicketPhoneLast4IsEmptyWithoutError(t *testing.T) {
	server, ticket := encryptedTicketFixture(t)
	ticket.PhoneCiphertext = nil
	ticket.PhoneNonce = nil
	ticket.PhoneHMAC = nil
	got, err := server.ticketPhoneLast4(ticket)
	if err != nil {
		t.Fatal(err)
	}
	if got != "" {
		t.Fatalf("purged ticket phone_last4 = %q, want empty", got)
	}
}

func TestStaffTicketResponseAssemblyRejectsCorruptCiphertext(t *testing.T) {
	server, ticket := encryptedTicketFixture(t)
	ticket.PhoneCiphertext[0] ^= 0xff

	response, err := server.staffTicketView(ticket)
	if err == nil {
		t.Fatalf("corrupt ciphertext produced a response: %#v", response)
	}
	if response != nil {
		t.Fatalf("failed response assembly must not expose a partial DTO: %#v", response)
	}
	if !strings.Contains(err.Error(), "encrypted field authentication failed") {
		t.Fatalf("unexpected corrupt ciphertext error: %v", err)
	}
}

func encryptedTicketFixture(t *testing.T) (*Server, model.QueueTicket) {
	t.Helper()
	cipher, err := security.NewCipher(bytes.Repeat([]byte{0x11}, 32), bytes.Repeat([]byte{0x22}, 32))
	if err != nil {
		t.Fatal(err)
	}
	projectID := "project-a"
	phoneCiphertext, phoneNonce, err := cipher.Encrypt("+8613812345678", []byte("phone:"+projectID))
	if err != nil {
		t.Fatal(err)
	}
	lastNameCiphertext, lastNameNonce, err := cipher.Encrypt("林", []byte("last_name:"+projectID))
	if err != nil {
		t.Fatal(err)
	}
	now := time.Unix(100, 0).UTC()
	phoneHMAC := cipher.Digest("+8613812345678")
	return &Server{cipher: cipher}, model.QueueTicket{
		ID: "ticket-a", ProjectID: projectID, DisplayNumber: "00042", Status: model.TicketWaiting,
		PhoneCiphertext: phoneCiphertext, PhoneNonce: phoneNonce,
		PhoneHMAC:          &phoneHMAC,
		LastNameCiphertext: lastNameCiphertext, LastNameNonce: lastNameNonce,
		Honorific: "女士", JoinedAt: now, CreatedAt: now,
	}
}

func assertPersonalTicketView(t *testing.T, view map[string]any, phone, lastName, honorific string) {
	t.Helper()
	for field, want := range map[string]string{"phone": phone, "last_name": lastName, "honorific": honorific} {
		if got := view[field]; got != want {
			t.Fatalf("%s = %v, want %q", field, got, want)
		}
	}
}