package v1

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strconv"
	"strings"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/suite"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/gochat/gochat/internal/model"
	"github.com/gochat/gochat/internal/repository"
	"github.com/gochat/gochat/internal/service"
)

type WebWidgetHandlerTestSuite struct {
	suite.Suite
	router   *gin.Engine
	handler  *WebWidgetHandler
	db       *gorm.DB
	inboxSvc *service.InboxService
}

func (s *WebWidgetHandlerTestSuite) SetupSuite() {
	gin.SetMode(gin.TestMode)

	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	s.Require().NoError(err)
	s.db = db

	err = db.AutoMigrate(
		&model.Account{},
		&model.User{},
		&model.Inbox{},
		&model.Contact{},
		&model.ContactInbox{},
		&model.Conversation{},
		&model.Message{},
	)
	s.Require().NoError(err)

	// Create real repos
	inboxRepo := repository.NewInboxRepo(db)

	// Create real service — InboxService only needs inboxRepo
	inboxSvc := service.NewInboxService(inboxRepo)
	s.inboxSvc = inboxSvc

	s.handler = NewWebWidgetHandler(inboxSvc)

	s.router = gin.New()
	api := s.router.Group("/api/v1/accounts/:id")
	api.POST("/inboxes/web_widget", s.handler.CreateWebWidgetInbox)
	api.GET("/inboxes/:inbox_id/web_widget_config", s.handler.GetWebWidgetConfig)
	api.PUT("/inboxes/:inbox_id/web_widget_config", s.handler.UpdateWebWidgetConfig)
	api.DELETE("/inboxes/:inbox_id/web_widget", s.handler.DeleteWebWidgetInbox)
}

func (s *WebWidgetHandlerTestSuite) TearDownSuite() {
	sqlDB, _ := s.db.DB()
	sqlDB.Close()
}

func (s *WebWidgetHandlerTestSuite) seedAccount() uint {
	acc := &model.Account{Name: "TestAccount"}
	s.Require().NoError(s.db.Create(acc).Error)
	return acc.ID
}

func (s *WebWidgetHandlerTestSuite) seedWidgetInbox(accountID uint) uint {
	inbox := &model.Inbox{
		Name:        "Widget Inbox",
		AccountID:   accountID,
		ChannelType: "web_widget",
		Enabled:     true,
	}
	s.Require().NoError(s.db.Create(inbox).Error)
	return inbox.ID
}

// --- Tests ---

func (s *WebWidgetHandlerTestSuite) TestCreateWebWidgetInbox_InvalidAccountID() {
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/inboxes/web_widget", nil)
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
	var body map[string]string
	json.Unmarshal(w.Body.Bytes(), &body)
	assert.Equal(s.T(), "invalid account_id", body["error"])
}

func (s *WebWidgetHandlerTestSuite) TestCreateWebWidgetInbox_InvalidBody() {
	accountID := s.seedAccount()
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/web_widget"
	req, _ := http.NewRequest("POST", url, strings.NewReader(""))
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestCreateWebWidgetInbox_Success() {
	accountID := s.seedAccount()
	body := `{"name": "Widget Inbox", "welcome_title": "Hi", "welcome_tagline": "Chat with us"}`
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/web_widget"
	req, _ := http.NewRequest("POST", url, strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusCreated, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestGetWebWidgetConfig_InvalidAccountID() {
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/inboxes/1/web_widget_config", nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
	var resp map[string]string
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Equal(s.T(), "invalid account_id", resp["error"])
}

func (s *WebWidgetHandlerTestSuite) TestGetWebWidgetConfig_InvalidInboxID() {
	accountID := s.seedAccount()
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/abc/web_widget_config"
	req, _ := http.NewRequest("GET", url, nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestGetWebWidgetConfig_NotFound() {
	accountID := s.seedAccount()
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/9999/web_widget_config"
	req, _ := http.NewRequest("GET", url, nil)
	s.router.ServeHTTP(w, req)

	// Should fail because inbox 9999 doesn't exist under this account
	assert.True(s.T(), w.Code == http.StatusInternalServerError || w.Code == http.StatusNotFound)
}

func (s *WebWidgetHandlerTestSuite) TestGetWebWidgetConfig_Success() {
	accountID := s.seedAccount()
	inboxID := s.seedWidgetInbox(accountID)
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/" + strconv.FormatUint(uint64(inboxID), 10) + "/web_widget_config"
	req, _ := http.NewRequest("GET", url, nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var body map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &body)
	assert.NotNil(s.T(), body)
}

func (s *WebWidgetHandlerTestSuite) TestUpdateWebWidgetConfig_InvalidAccountID() {
	w := httptest.NewRecorder()
	body := `{"widget_color": "#333"}`
	req, _ := http.NewRequest("PUT", "/api/v1/accounts/abc/inboxes/1/web_widget_config", strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestUpdateWebWidgetConfig_InvalidInboxID() {
	accountID := s.seedAccount()
	w := httptest.NewRecorder()
	body := `{"widget_color": "#333"}`
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/abc/web_widget_config"
	req, _ := http.NewRequest("PUT", url, strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestUpdateWebWidgetConfig_Success() {
	accountID := s.seedAccount()
	inboxID := s.seedWidgetInbox(accountID)
	w := httptest.NewRecorder()
	body := `{"widget_color": "#00FF00", "welcome_title": "Updated Title", "welcome_tagline": "Updated Tagline"}`
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/" + strconv.FormatUint(uint64(inboxID), 10) + "/web_widget_config"
	req, _ := http.NewRequest("PUT", url, strings.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.NotNil(s.T(), resp)
}

func (s *WebWidgetHandlerTestSuite) TestDeleteWebWidgetInbox_InvalidAccountID() {
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/api/v1/accounts/abc/inboxes/1/web_widget", nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestDeleteWebWidgetInbox_InvalidInboxID() {
	accountID := s.seedAccount()
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/abc/web_widget"
	req, _ := http.NewRequest("DELETE", url, nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
}

func (s *WebWidgetHandlerTestSuite) TestDeleteWebWidgetInbox_Success() {
	accountID := s.seedAccount()
	inboxID := s.seedWidgetInbox(accountID)
	w := httptest.NewRecorder()
	url := "/api/v1/accounts/" + strconv.FormatUint(uint64(accountID), 10) + "/inboxes/" + strconv.FormatUint(uint64(inboxID), 10) + "/web_widget"
	req, _ := http.NewRequest("DELETE", url, nil)
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
}

func TestWebWidgetHandlerTestSuite(t *testing.T) {
	suite.Run(t, new(WebWidgetHandlerTestSuite))
}