package v1

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/gochat/gochat/internal/automation"
	"github.com/gochat/gochat/internal/model"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/suite"
	"gorm.io/datatypes"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

type CsatSurveyHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *CsatSurveyHandler
	account *model.Account
}

type csatSurveyTestDBProvider struct {
	db *gorm.DB
}

func (p *csatSurveyTestDBProvider) DB() *gorm.DB {
	return p.db
}

func (s *CsatSurveyHandlerTestSuite) SetupSuite() {
	gin.SetMode(gin.TestMode)
	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	s.Require().NoError(err)
	s.Require().NoError(db.AutoMigrate(
		&model.Account{},
		&model.Inbox{},
		&model.Contact{},
		&model.Conversation{},
		&model.Message{},
		&automation.CsatSurveyResponse{},
		&model.ReportingEventsRollup{},
	))
	s.db = db

	svc := automation.NewCsatSurveyService(&csatSurveyTestDBProvider{db: db})
	s.handler = NewCsatSurveyHandler(svc)

	s.account = &model.Account{Name: "test-csat-survey-account"}
	s.Require().NoError(db.Create(s.account).Error)
}

func (s *CsatSurveyHandlerTestSuite) SetupTest() {
	s.db.Exec("DELETE FROM csat_survey_responses")
	s.db.Exec("DELETE FROM messages")
	s.db.Exec("DELETE FROM conversations")
	s.db.Exec("DELETE FROM contacts")
	s.db.Exec("DELETE FROM inboxes")
}

func (s *CsatSurveyHandlerTestSuite) TearDownSuite() {
	if s.db != nil {
		sqlDB, _ := s.db.DB()
		sqlDB.Close()
	}
}

func TestCsatSurveyHandlerSuite(t *testing.T) {
	suite.Run(t, new(CsatSurveyHandlerTestSuite))
}

func (s *CsatSurveyHandlerTestSuite) TestList_Success() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/csats", s.handler.List)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/csats", s.account.ID), nil)
	r.ServeHTTP(w, req)

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

func (s *CsatSurveyHandlerTestSuite) TestMetrics_Success() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/csat_metrics", s.handler.Metrics)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", fmt.Sprintf("/api/v1/accounts/%d/csat_metrics", s.account.ID), nil)
	r.ServeHTTP(w, req)

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

func (s *CsatSurveyHandlerTestSuite) TestUpdateReviewNotes_Success() {
	survey := &automation.CsatSurveyResponse{AccountID: s.account.ID, ConversationID: 1, Rating: 5}
	s.Require().NoError(s.db.Create(survey).Error)

	r := gin.New()
	r.PUT("/api/v1/accounts/:account_id/csats/:id/review_notes", func(c *gin.Context) {
		c.Set("user_id", float64(1))
		s.handler.UpdateReviewNotes(c)
	})

	w := httptest.NewRecorder()
	body := `{"review_notes":"good conversation"}`
	req, _ := http.NewRequest("PUT", fmt.Sprintf("/api/v1/accounts/%d/csats/%d/review_notes", s.account.ID, survey.ID), bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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

func (s *CsatSurveyHandlerTestSuite) TestUpdate_Success() {
	survey := &automation.CsatSurveyResponse{AccountID: s.account.ID, ConversationID: 1, Rating: 5}
	s.Require().NoError(s.db.Create(survey).Error)

	r := gin.New()
	r.PUT("/api/v1/accounts/:account_id/csats/:id", func(c *gin.Context) {
		c.Set("user_id", float64(1))
		s.handler.Update(c)
	})

	w := httptest.NewRecorder()
	body := `{"review_notes":"updated notes"}`
	req, _ := http.NewRequest("PUT", fmt.Sprintf("/api/v1/accounts/%d/csats/%d", s.account.ID, survey.ID), bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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

func (s *CsatSurveyHandlerTestSuite) TestPublicCsatShowAndUpdate_Success() {
	conversation, message := s.seedPublicCsatSurvey(time.Now())

	r := gin.New()
	r.GET("/public/api/v1/csat_survey/:id", s.handler.PublicGet)
	r.PATCH("/public/api/v1/csat_survey/:id", s.handler.PublicUpdate)

	wShow := httptest.NewRecorder()
	reqShow, _ := http.NewRequest("GET", "/public/api/v1/csat_survey/"+conversation.UUID, nil)
	r.ServeHTTP(wShow, reqShow)
	assert.Equal(s.T(), http.StatusOK, wShow.Code)

	var showResp map[string]any
	s.Require().NoError(json.Unmarshal(wShow.Body.Bytes(), &showResp))
	assert.Equal(s.T(), float64(message.ID), showResp["id"])
	assert.Nil(s.T(), showResp["csat_survey_response"])
	assert.Equal(s.T(), "emoji", showResp["display_type"])
	assert.Equal(s.T(), "Rate this chat", showResp["content"])
	assert.Equal(s.T(), "CSAT Inbox", showResp["inbox_name"])

	body := `{"message":{"submitted_values":[{"csat_survey_response":{"rating":4,"feedback_message":"Helpful"}}]}}`
	wUpdate := httptest.NewRecorder()
	reqUpdate, _ := http.NewRequest("PATCH", "/public/api/v1/csat_survey/"+conversation.UUID, bytes.NewBufferString(body))
	reqUpdate.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(wUpdate, reqUpdate)
	assert.Equal(s.T(), http.StatusOK, wUpdate.Code)

	var updateResp map[string]any
	s.Require().NoError(json.Unmarshal(wUpdate.Body.Bytes(), &updateResp))
	csatResp := updateResp["csat_survey_response"].(map[string]any)
	assert.Equal(s.T(), float64(4), csatResp["rating"])
	assert.Equal(s.T(), "Helpful", csatResp["feedback_message"])

	var stored automation.CsatSurveyResponse
	s.Require().NoError(s.db.Where("message_id = ?", message.ID).First(&stored).Error)
	assert.Equal(s.T(), 4, stored.Rating)
	assert.Equal(s.T(), "Helpful", stored.FeedbackMessage)
	assert.Equal(s.T(), conversation.ContactID, stored.ContactID)
	s.Require().NotNil(stored.MessageID)
	assert.Equal(s.T(), message.ID, *stored.MessageID)

	var storedMessage model.Message
	s.Require().NoError(s.db.First(&storedMessage, message.ID).Error)
	var attrs map[string]any
	s.Require().NoError(json.Unmarshal(storedMessage.ContentAttributes, &attrs))
	assert.NotEmpty(s.T(), attrs["submitted_values"])
}

func (s *CsatSurveyHandlerTestSuite) TestPublicCsatUpdate_LockedAfter14Days() {
	conversation, _ := s.seedPublicCsatSurvey(time.Now().AddDate(0, 0, -15))

	r := gin.New()
	r.PATCH("/public/api/v1/csat_survey/:id", s.handler.PublicUpdate)

	body := `{"message":{"submitted_values":[{"csat_survey_response":{"rating":5,"feedback_message":"Too late"}}]}}`
	w := httptest.NewRecorder()
	req, _ := http.NewRequest("PATCH", "/public/api/v1/csat_survey/"+conversation.UUID, bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)
	assert.Equal(s.T(), http.StatusUnprocessableEntity, w.Code)
	assert.Contains(s.T(), w.Body.String(), "You cannot update the CSAT survey after 14 days")
}

func (s *CsatSurveyHandlerTestSuite) TestList_BadRequest_InvalidAccountID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/csats", s.handler.List)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/csats", nil)
	r.ServeHTTP(w, req)

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

func (s *CsatSurveyHandlerTestSuite) seedPublicCsatSurvey(createdAt time.Time) (*model.Conversation, *model.Message) {
	contact := &model.Contact{AccountID: s.account.ID, Name: "CSAT Contact"}
	s.Require().NoError(s.db.Create(contact).Error)
	inbox := &model.Inbox{
		AccountID:         s.account.ID,
		Name:              "CSAT Inbox",
		ChannelType:       "web_widget",
		Enabled:           true,
		CsatSurveyEnabled: true,
		CsatConfig:        `{"display_type":"emoji","message":"Rate this chat"}`,
		AvatarURL:         "https://example.test/avatar.png",
	}
	s.Require().NoError(s.db.Create(inbox).Error)
	conversation := &model.Conversation{
		AccountID:   s.account.ID,
		InboxID:     inbox.ID,
		ContactID:   contact.ID,
		Status:      "resolved",
		ChannelType: inbox.ChannelType,
		Channel:     inbox.ChannelType,
	}
	s.Require().NoError(s.db.Create(conversation).Error)
	message := &model.Message{
		ConversationID:    conversation.ID,
		AccountID:         s.account.ID,
		InboxID:           inbox.ID,
		Content:           "Please rate this conversation",
		ContentType:       "input_csat",
		MessageType:       "outgoing",
		Status:            "sent",
		ContentAttributes: datatypes.JSON(`{}`),
	}
	s.Require().NoError(s.db.Create(message).Error)
	s.Require().NoError(s.db.Model(message).Updates(map[string]any{"created_at": createdAt, "updated_at": createdAt}).Error)
	s.Require().NoError(s.db.First(message, message.ID).Error)
	return conversation, message
}