package httpapi

import (
	"bytes"
	"context"
	"io"
	"log/slog"
	"net/http"
	"net/http/httptest"
	"os"
	"strings"
	"testing"
	"time"

	"calllinesystem/server/internal/config"
	"calllinesystem/server/internal/database"
	"calllinesystem/server/internal/model"
	"calllinesystem/server/internal/security"

	"github.com/google/uuid"
)

func TestPublicCreateTicketIgnoresDuplicateFromEndedSession(t *testing.T) {
	dsn := strings.TrimSpace(os.Getenv("TEST_DATABASE_URL"))
	if dsn == "" {
		t.Skip("TEST_DATABASE_URL is not set")
	}

	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()
	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
	db, err := database.Open(ctx, dsn, logger)
	if err != nil {
		t.Fatal(err)
	}
	defer database.Close(db)
	sqlDB, err := database.SQLDB(db)
	if err != nil {
		t.Fatal(err)
	}
	if err := database.Migrate(ctx, sqlDB, logger); err != nil {
		t.Fatal(err)
	}

	server, err := New(db, config.Config{
		Environment:   "development",
		EncryptionKey: bytes.Repeat([]byte{0x41}, 32),
		PhoneHMACKey:  bytes.Repeat([]byte{0x42}, 32),
	}, logger)
	if err != nil {
		t.Fatal(err)
	}
	now := time.Date(2026, 7, 28, 1, 0, 0, 0, time.UTC)
	server.now = func() time.Time { return now }

	var actor model.User
	if err := db.Where("username = ?", model.PublicVisitorUsername).First(&actor).Error; err != nil {
		t.Fatal(err)
	}
	projectID := uuid.NewString()
	project := model.Project{
		ID: projectID, Code: strings.ToUpper("PUB" + uuid.NewString()[:6]), Name: "Public duplicate regression",
		Status: model.ProjectRunning, Timezone: "Asia/Shanghai", TicketPrefix: "A",
		CallBatchSize: 5, CallMode: model.CallModeBoth,
		MaxCallTicketCount: 100, DefaultCallPeopleCount: 1, MaxCallPeopleCount: 100,
		MinPartySize: 1, MaxPartySize: 10, GracePeriodMinutes: 5,
		ETAMode: model.ETAFixedBatch, AverageBatchIntervalSeconds: 60,
		ContinuousRatePerMinute: 2, ETABufferMinutes: 5, ETAIntervalSeconds: 60,
		VisitorNotice: "", DeviceSimulationMode: "DISABLED", CreatedAt: now, UpdatedAt: now,
	}
	if err := db.Create(&project).Error; err != nil {
		t.Fatal(err)
	}
	endedAt := now.Add(-12 * time.Hour)
	oldSession := model.QueueSession{
		ID: uuid.NewString(), ProjectID: projectID, BusinessDate: now.AddDate(0, 0, -1),
		Status: "ENDED", NextTicketNumber: 2, Revision: 1,
		OpenedAt: now.Add(-24 * time.Hour), ClosedAt: &endedAt, CreatedAt: now.Add(-24 * time.Hour), UpdatedAt: endedAt,
	}
	currentSession := model.QueueSession{
		ID: uuid.NewString(), ProjectID: projectID, BusinessDate: now,
		Status: "RUNNING", NextTicketNumber: 1, Revision: 0,
		OpenedAt: now, CreatedAt: now, UpdatedAt: now,
	}
	if err := db.Create(&oldSession).Error; err != nil {
		t.Fatal(err)
	}
	if err := db.Create(&currentSession).Error; err != nil {
		t.Fatal(err)
	}

	phone := "13800138000"
	phoneCiphertext, phoneNonce, err := server.cipher.Encrypt(phone, []byte("phone:"+projectID))
	if err != nil {
		t.Fatal(err)
	}
	phoneHMAC := server.cipher.Digest(phone)
	oldTicket := model.QueueTicket{
		ID: uuid.NewString(), ProjectID: projectID, QueueSessionID: oldSession.ID,
		TicketNumber: 1, DisplayNumber: "00001", PartySize: 1,
		PublicTokenHash: security.HashToken(uuid.NewString()),
		PhoneCiphertext: phoneCiphertext, PhoneNonce: phoneNonce, PhoneHMAC: &phoneHMAC,
		Honorific: "游客", Status: model.TicketWaiting, JoinedAt: oldSession.OpenedAt,
		PersonalDataPurgeAt: now.Add(30 * 24 * time.Hour), CreatedBy: actor.ID,
		CreatedAt: oldSession.OpenedAt, UpdatedAt: oldSession.OpenedAt,
	}
	if err := db.Create(&oldTicket).Error; err != nil {
		t.Fatal(err)
	}

	recorder := httptest.NewRecorder()
	request := httptest.NewRequest(http.MethodPost, "/api/public/projects/"+projectID+"/tickets",
		strings.NewReader(`{"phone":"13800138000","honorific":"游客","party_size":1,"allow_duplicate":false}`))
	request.Header.Set("Idempotency-Key", "public-ended-session-"+uuid.NewString())

	server.Handler().ServeHTTP(recorder, request)

	if recorder.Code != http.StatusCreated {
		t.Fatalf("status = %d, want 201; body = %s", recorder.Code, recorder.Body.String())
	}

	duplicateRecorder := httptest.NewRecorder()
	duplicateRequest := httptest.NewRequest(http.MethodPost, "/api/public/projects/"+projectID+"/tickets",
		strings.NewReader(`{"phone":"13800138000","honorific":"游客","party_size":1,"allow_duplicate":false}`))
	duplicateRequest.Header.Set("Idempotency-Key", "public-current-session-"+uuid.NewString())

	server.Handler().ServeHTTP(duplicateRecorder, duplicateRequest)

	if duplicateRecorder.Code != http.StatusConflict || !strings.Contains(duplicateRecorder.Body.String(), `"code":"DUPLICATE_PHONE"`) {
		t.Fatalf("current-session duplicate status = %d, want 409 DUPLICATE_PHONE; body = %s",
			duplicateRecorder.Code, duplicateRecorder.Body.String())
	}
}