package handler

import (
	"baron-sso-backend/internal/domain"
	"bytes"
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

// --- Local Mocks for Signup Test ---

type MockRedisForSignup struct {
	mock.Mock
}

func (m *MockRedisForSignup) Set(key string, value string, ttl time.Duration) error {
	return m.Called(key, value, ttl).Error(0)
}

func (m *MockRedisForSignup) Get(key string) (string, error) {
	args := m.Called(key)
	return args.String(0), args.Error(1)
}

func (m *MockRedisForSignup) Delete(key string) error {
	return m.Called(key).Error(0)
}
func (m *MockRedisForSignup) StoreVerificationCode(phone, code string) error   { return nil }
func (m *MockRedisForSignup) GetVerificationCode(phone string) (string, error) { return "", nil }
func (m *MockRedisForSignup) DeleteVerificationCode(phone string) error        { return nil }
func (m *MockRedisForSignup) Ping(ctx context.Context) error                   { return nil }

type MockIdpForSignup struct {
	mock.Mock
}

func (m *MockIdpForSignup) Name() string { return "mock-idp" }
func (m *MockIdpForSignup) GetMetadata() (*domain.IDPMetadata, error) {
	return &domain.IDPMetadata{SupportedFields: []string{"email", "name", "phoneNumber", "grade", "department"}}, nil
}

func (m *MockIdpForSignup) CreateUser(user *domain.BrokerUser, password string) (string, error) {
	args := m.Called(user, password)
	return args.String(0), args.Error(1)
}

func (m *MockIdpForSignup) SignIn(loginID, password string) (*domain.AuthInfo, error) {
	return nil, nil
}
func (m *MockIdpForSignup) UserExists(loginID string) (bool, error)               { return false, nil }
func (m *MockIdpForSignup) IssueSession(loginID string) (*domain.AuthInfo, error) { return nil, nil }
func (m *MockIdpForSignup) InitiateLinkLogin(loginID, returnTo string) (*domain.LinkLoginInit, error) {
	return nil, nil
}

func (m *MockIdpForSignup) VerifyLoginCode(loginID, flowID, code string) (*domain.AuthInfo, error) {
	return nil, nil
}

func (m *MockIdpForSignup) GetPasswordPolicy() (*domain.PasswordPolicy, error) {
	return &domain.PasswordPolicy{MinLength: 12}, nil
}
func (m *MockIdpForSignup) InitiatePasswordReset(loginID, redirectUrl string) error { return nil }
func (m *MockIdpForSignup) VerifyPasswordResetToken(token string) (*domain.AuthInfo, error) {
	return nil, nil
}

func (m *MockIdpForSignup) UpdateUserPassword(loginID, newPassword string, r *http.Request) error {
	return nil
}

func TestSignup_TenantSlugValidation(t *testing.T) {
	app := fiber.New()
	mockTenantSvc := new(MockTenantService)
	mockRedis := new(MockRedisForSignup)
	mockIdp := new(MockIdpForSignup)

	h := &AuthHandler{
		TenantService: mockTenantSvc,
		RedisService:  mockRedis,
		IdpProvider:   mockIdp,
	}

	app.Post("/signup", h.Signup)

	// Prepare mock state (already verified email/phone)
	verifiedState, _ := json.Marshal(map[string]any{
		"verified":   true,
		"expires_at": time.Now().Add(time.Hour).Unix(),
	})
	mockRedis.On("Get", mock.Anything).Return(string(verifiedState), nil)

	t.Run("Rejects legacy CompanyCode", func(t *testing.T) {
		reqBody := domain.SignupRequest{
			Email:         "user@gmail.com",
			Password:      "StrongPass123!",
			Name:          "Test User",
			Phone:         "010-1234-5678",
			TermsAccepted: true,
			CompanyCode:   "new-slug",
		}
		body, _ := json.Marshal(reqBody)

		req := httptest.NewRequest("POST", "/signup", bytes.NewReader(body))
		req.Header.Set("Content-Type", "application/json")
		resp, _ := app.Test(req)

		assert.Equal(t, http.StatusBadRequest, resp.StatusCode)
	})

	t.Run("Active Tenant Slug", func(t *testing.T) {
		reqBody := domain.SignupRequest{
			Email:         "user@hanmaceng.co.kr",
			Password:      "StrongPass123!",
			Name:          "Test User",
			Phone:         "010-1234-5678",
			TermsAccepted: true,
			TenantSlug:    "hanmac",
		}
		body, _ := json.Marshal(reqBody)

		validTenant := &domain.Tenant{ID: "t1", Slug: "hanmac", Status: domain.TenantStatusActive}
		mockTenantSvc.On("GetTenantByDomain", mock.Anything, "hanmaceng.co.kr").Return(&domain.Tenant{Slug: "hanmac"}, nil).Once()
		mockTenantSvc.On("ProvisionTenantByDomain", mock.Anything, "hanmaceng.co.kr").Return(validTenant, nil).Maybe()
		mockTenantSvc.On("GetTenantBySlug", mock.Anything, "hanmac").Return(validTenant, nil).Once()
		mockTenantSvc.On("GetTenant", mock.Anything, "t1").Return(validTenant, nil).Once()
		mockIdp.On("CreateUser", mock.Anything, mock.Anything).Return("user-id", nil).Once()
		mockRedis.On("Delete", mock.Anything).Return(nil)

		req := httptest.NewRequest("POST", "/signup", bytes.NewReader(body))
		req.Header.Set("Content-Type", "application/json")
		resp, _ := app.Test(req)

		assert.Equal(t, http.StatusOK, resp.StatusCode)
	})
}