package handler

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

// MockAuthService implements service.AuthService
type MockAuthService struct {
	mock.Mock
}

func (m *MockAuthService) OtpRequest(ctx context.Context, phoneNumber string) error {
	args := m.Called(ctx, phoneNumber)
	return args.Error(0)
}

func (m *MockAuthService) OtpVerify(ctx context.Context, phoneNumber, code string, loginChallenge string) (string, error) {
	args := m.Called(ctx, phoneNumber, code, loginChallenge)
	return args.String(0), args.Error(1)
}

func (m *MockAuthService) AcceptConsent(ctx context.Context, phoneNumber string, challenge string) (string, error) {
	args := m.Called(ctx, phoneNumber, challenge)
	return args.String(0), args.Error(1)
}

func TestNewAuthHandler(t *testing.T) {
	mockService := &MockAuthService{}
	handler := NewAuthHandler(mockService)

	assert.NotNil(t, handler)
	assert.Equal(t, mockService, handler.service)
	assert.Implements(t, (*StrictServerInterface)(nil), handler)
}

func TestAuthHandler_PostAuthOtpRequest(t *testing.T) {
	tests := []struct {
		name           string
		phoneNumber    string
		setupMock      func(*MockAuthService)
		expectedStatus int
		expectedOk     bool
		expectedMsg    string
	}{
		{
			name:        "successful otp request",
			phoneNumber: "+79161234567",
			setupMock: func(m *MockAuthService) {
				m.On("OtpRequest", mock.Anything, "+79161234567").Return(nil).Once()
			},
			expectedStatus: 200,
			expectedOk:     true,
			expectedMsg:    "OTP request successful",
		},
		{
			name:        "service error",
			phoneNumber: "invalid",
			setupMock: func(m *MockAuthService) {
				m.On("OtpRequest", mock.Anything, "invalid").Return(assert.AnError).Once()
			},
			expectedStatus: 400,
			expectedOk:     false,
			expectedMsg:    assert.AnError.Error(),
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockService := &MockAuthService{}
			handler := &AuthHandler{service: mockService}
			ctx := context.Background()

			tt.setupMock(mockService)

			request := PostAuthOtpRequestRequestObject{
				Body: &PostAuthOtpRequestJSONRequestBody{
					PhoneNumber: tt.phoneNumber,
				},
			}

			result, err := handler.PostAuthOtpRequest(ctx, request)

			assert.NoError(t, err) // Handler should not return errors, only response objects

			if tt.expectedStatus == 200 {
				response, ok := result.(PostAuthOtpRequest200JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
			} else {
				response, ok := result.(PostAuthOtpRequest400JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
			}

			mockService.AssertExpectations(t)
		})
	}
}

func TestAuthHandler_PostAuthOtpVerify(t *testing.T) {
	tests := []struct {
		name             string
		phoneNumber      string
		otp              string
		loginChallenge   string
		setupMock        func(*MockAuthService)
		expectedStatus   int
		expectedOk       bool
		expectedMsg      string
		expectedRedirect string
	}{
		{
			name:           "successful otp verification",
			phoneNumber:    "+79161234567",
			otp:            "123456",
			loginChallenge: "challenge123",
			setupMock: func(m *MockAuthService) {
				m.On("OtpVerify", mock.Anything, "+79161234567", "123456", "challenge123").
					Return("https://example.com/callback", nil).Once()
			},
			expectedStatus:   200,
			expectedOk:       true,
			expectedMsg:      "OTP verification successful",
			expectedRedirect: "https://example.com/callback",
		},
		{
			name:           "service error",
			phoneNumber:    "+79161234567",
			otp:            "wrong",
			loginChallenge: "challenge123",
			setupMock: func(m *MockAuthService) {
				m.On("OtpVerify", mock.Anything, "+79161234567", "wrong", "challenge123").
					Return("", assert.AnError).Once()
			},
			expectedStatus:   400,
			expectedOk:       false,
			expectedMsg:      assert.AnError.Error(),
			expectedRedirect: "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockService := &MockAuthService{}
			handler := &AuthHandler{service: mockService}
			ctx := context.Background()

			tt.setupMock(mockService)

			request := PostAuthOtpVerifyRequestObject{
				Body: &PostAuthOtpVerifyJSONRequestBody{
					PhoneNumber:    tt.phoneNumber,
					Otp:            tt.otp,
					LoginChallenge: tt.loginChallenge,
				},
			}

			result, err := handler.PostAuthOtpVerify(ctx, request)

			assert.NoError(t, err)

			if tt.expectedStatus == 200 {
				response, ok := result.(PostAuthOtpVerify200JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
				assert.Equal(t, tt.expectedRedirect, response.RedirectUrl)
			} else {
				response, ok := result.(PostAuthOtpVerify400JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
				assert.Equal(t, tt.expectedRedirect, response.RedirectUrl)
			}

			mockService.AssertExpectations(t)
		})
	}
}

func TestAuthHandler_PostAuthConsentAccept(t *testing.T) {
	tests := []struct {
		name             string
		phoneNumber      string
		consentChallenge string
		setupMock        func(*MockAuthService)
		expectedStatus   int
		expectedOk       bool
		expectedMsg      string
		expectedRedirect string
	}{
		{
			name:             "successful consent accept",
			phoneNumber:      "+79161234567",
			consentChallenge: "consent123",
			setupMock: func(m *MockAuthService) {
				m.On("AcceptConsent", mock.Anything, "+79161234567", "consent123").
					Return("https://example.com/callback", nil).Once()
			},
			expectedStatus:   200,
			expectedOk:       true,
			expectedMsg:      "Consent accepted successfully",
			expectedRedirect: "https://example.com/callback",
		},
		{
			name:             "service error",
			phoneNumber:      "+79161234567",
			consentChallenge: "invalid",
			setupMock: func(m *MockAuthService) {
				m.On("AcceptConsent", mock.Anything, "+79161234567", "invalid").
					Return("", assert.AnError).Once()
			},
			expectedStatus:   400,
			expectedOk:       false,
			expectedMsg:      assert.AnError.Error(),
			expectedRedirect: "",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockService := &MockAuthService{}
			handler := &AuthHandler{service: mockService}
			ctx := context.Background()

			tt.setupMock(mockService)

			request := PostAuthConsentAcceptRequestObject{
				Body: &PostAuthConsentAcceptJSONRequestBody{
					PhoneNumber:      tt.phoneNumber,
					ConsentChallenge: tt.consentChallenge,
				},
			}

			result, err := handler.PostAuthConsentAccept(ctx, request)

			assert.NoError(t, err)

			if tt.expectedStatus == 200 {
				response, ok := result.(PostAuthConsentAccept200JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
				assert.Equal(t, tt.expectedRedirect, response.RedirectUrl)
			} else {
				response, ok := result.(PostAuthConsentAccept400JSONResponse)
				assert.True(t, ok)
				assert.Equal(t, tt.expectedOk, response.Ok)
				assert.Equal(t, tt.expectedMsg, response.Message)
				assert.Equal(t, tt.expectedRedirect, response.RedirectUrl)
			}

			mockService.AssertExpectations(t)
		})
	}
}

func TestAuthHandler_EdgeCases(t *testing.T) {
	t.Run("nil request body should not panic", func(t *testing.T) {
		mockService := &MockAuthService{}
		handler := &AuthHandler{service: mockService}
		ctx := context.Background()

		// Test with nil body - this should be handled by the generated code
		// but we test that our handler doesn't panic
		defer func() {
			if r := recover(); r != nil {
				t.Errorf("Handler panicked with nil body: %v", r)
			}
		}()

		request := PostAuthOtpRequestRequestObject{
			Body: &PostAuthOtpRequestJSONRequestBody{
				PhoneNumber: "",
			},
		}

		mockService.On("OtpRequest", mock.Anything, "").Return(assert.AnError).Once()

		result, err := handler.PostAuthOtpRequest(ctx, request)

		assert.NoError(t, err)
		assert.NotNil(t, result)

		mockService.AssertExpectations(t)
	})
}