package twilio

import (
	"context"
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	channelpkg "github.com/gochat/gochat/internal/channel"
	"github.com/gochat/gochat/internal/model"
)

func TestNewWebhookHandler_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)
	assert.NotNil(t, h)
}

func TestWebhookHandler_HandleInboundSMS_Success_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM123&AccountSid=AC123&From=%2B1234567890&To=%2B1987654321&Body=Hello&NumMedia=0&SmsStatus=received"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	h.HandleInboundSMS(w, req, inbox)
	assert.Equal(t, http.StatusOK, w.Code)
	assert.Contains(t, w.Header().Get("Content-Type"), "xml")
}

func TestWebhookHandler_HandleInboundSMS_NoFrom_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM123&To=%2B1987654321&Body=Hello&NumMedia=0"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	h.HandleInboundSMS(w, req, inbox)
	assert.Equal(t, http.StatusOK, w.Code)
}

func TestWebhookHandler_ProcessInboundSMS_WithMedia_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM456&From=%2B1234567890&To=%2B1987654321&Body=MMS&NumMedia=2&MediaUrl0=http://img1.jpg&MediaUrl1=http://img2.jpg&MediaContentType0=image/jpeg&MediaContentType1=image/png"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	msg, err := h.ProcessInboundSMS(req, inbox)
	require.NoError(t, err)
	require.NotNil(t, msg)
	assert.Equal(t, "SM456", msg.SourceID)
}

func TestWebhookHandler_ProcessInboundSMS_InvalidNumMedia_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM789&From=%2B1234567890&To=%2B1987654321&Body=text&NumMedia=abc"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	msg, err := h.ProcessInboundSMS(req, inbox)
	require.NoError(t, err)
	require.NotNil(t, msg)
}

func TestWebhookHandler_HandleDeliveryStatus_Delivered_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM123&MessageStatus=delivered&To=%2B1234567890&From=%2B1987654321"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	h.HandleDeliveryStatus(w, req, inbox)
	assert.Equal(t, http.StatusOK, w.Code)
}

func TestWebhookHandler_HandleDeliveryStatus_Unhandled_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	pipe := NewIncomingProcessor(svc)
	h := NewWebhookHandler(pipe, svc)

	formData := "MessageSid=SM000&MessageStatus=sent&To=%2B1234567890"
	req := httptest.NewRequest("POST", "/webhook", strings.NewReader(formData))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	w := httptest.NewRecorder()
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}

	h.HandleDeliveryStatus(w, req, inbox)
	assert.Equal(t, http.StatusOK, w.Code)
}

func TestWriteTwiMLResponse_WithMessage_Cov4(t *testing.T) {
	w := httptest.NewRecorder()
	writeTwiMLResponse(w, "Hello from GoChat")
	assert.Equal(t, http.StatusOK, w.Code)
	assert.Contains(t, w.Body.String(), "Hello from GoChat")
	assert.Contains(t, w.Header().Get("Content-Type"), "xml")
}

func TestWriteTwiMLResponse_EmptyMessage_Cov4(t *testing.T) {
	w := httptest.NewRecorder()
	writeTwiMLResponse(w, "")
	assert.Equal(t, http.StatusOK, w.Code)
	assert.Contains(t, w.Body.String(), "Response")
}

func TestTwiMLResponse_Xml_Cov4(t *testing.T) {
	resp := TwiMLResponse{
		Message: []TwiMLMsg{{Text: "test"}},
	}
	assert.NotEmpty(t, resp.Message)
}

func TestTwilioProvider_OnCreate_NoCredentials_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	provider := NewTwilioProvider(svc, &Repository{}, NewIncomingProcessor(svc))
	inbox := &model.Inbox{Base: model.Base{ID: 1}, AccountID: 1}
	config := channelpkg.ChannelConfig{}
	result, err := provider.OnCreate(context.Background(), inbox, config)
	assert.NoError(t, err)
	assert.NotNil(t, result)
}

func TestTwilioProvider_SendMessage_APIError_Cov4(t *testing.T) {
	svc := NewTwilioService(nil)
	svc.client.SetTransport(&testTransport{handler: func(req *http.Request) (*http.Response, error) {
		return &http.Response{
			StatusCode: 500,
			Body:       io.NopCloser(strings.NewReader("Internal Server Error")),
			Header:     make(http.Header),
		}, nil
	}})
	provider := NewTwilioProvider(svc, &Repository{}, NewIncomingProcessor(svc))
	ctx := context.Background()
	inbox := &model.Inbox{
		Base:          model.Base{ID: 1},
		ChannelConfig: `{"account_sid":"AC123","auth_token":"token","phone_number":"+198****4321"}`,
	}
	contact := &model.Contact{SourceID: "+123****7890"}
	msg := &model.Message{Content: "Hello"}
	_, err := provider.SendMessage(ctx, inbox, msg, contact)
	assert.Error(t, err)
}

func TestParseInboxConfig_InvalidJSON_Cov4(t *testing.T) {
	result := parseInboxConfig("invalid json")
	assert.NotNil(t, result)
	assert.Empty(t, result)
}

func TestConfigStr_NonStringValue_Cov4(t *testing.T) {
	result := configStr(channelpkg.ChannelConfig{"key": 123}, "key", "default")
	assert.Equal(t, "default", result)
}

func TestParseInboxConfig_Empty_Cov4(t *testing.T) {
	result := parseInboxConfig("")
	assert.NotNil(t, result)
	assert.Empty(t, result)
}