package v1

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

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

type ContactMergeHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *ContactMergeHandler

	account  *model.Account
	contact1 *model.Contact
	contact2 *model.Contact
}

func (s *ContactMergeHandlerTestSuite) 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.Contact{}, &model.ContactInbox{}, &model.Conversation{}, &model.Message{}, &model.ContactNote{}, &model.Note{}))
	s.db = db

	mergeRepo := repository.NewContactMergeRepo(db)
	mergeSvc := service.NewContactMergeService(mergeRepo, db)
	s.handler = NewContactMergeHandler(mergeSvc)

	s.account = &model.Account{Name: "test-merge-account"}
	s.db.Create(s.account)
	s.contact1 = &model.Contact{Name: "base-contact", AccountID: s.account.ID}
	s.db.Create(s.contact1)
	s.contact2 = &model.Contact{Name: "target-contact", AccountID: s.account.ID}
	s.db.Create(s.contact2)
}

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

func TestContactMergeHandlerSuite(t *testing.T) {
	suite.Run(t, new(ContactMergeHandlerTestSuite))
}

func (s *ContactMergeHandlerTestSuite) TestCreate_Success() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/actions/contact_merge", func(c *gin.Context) {
		c.Set("account_id", float64(s.account.ID))
		c.Next()
	}, s.handler.Create)

	base := &model.Contact{Name: "merge-base", Email: "base@example.com", AccountID: s.account.ID}
	mergee := &model.Contact{Name: "mergee-contact", PhoneNumber: "+12212345", AccountID: s.account.ID}
	s.Require().NoError(s.db.Create(base).Error)
	s.Require().NoError(s.db.Create(mergee).Error)

	body := map[string]uint{"base_contact_id": base.ID, "mergee_contact_id": mergee.ID}
	b, _ := json.Marshal(body)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/actions/contact_merge", s.account.ID), bytes.NewBuffer(b))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var payload map[string]any
	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &payload))
	assert.Equal(s.T(), float64(base.ID), payload["id"])
	assert.Equal(s.T(), "base@example.com", payload["email"])
	assert.NotContains(s.T(), payload, "success")
	assert.NotContains(s.T(), payload, "data")
}

func (s *ContactMergeHandlerTestSuite) TestCreate_BadRequest_NoBody() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/actions/contact_merge", func(c *gin.Context) {
		c.Set("account_id", float64(s.account.ID))
		c.Next()
	}, s.handler.Create)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/actions/contact_merge", s.account.ID), nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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

func (s *ContactMergeHandlerTestSuite) TestCreate_BadRequest_InvalidAccountID() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/actions/contact_merge", s.handler.Create)

	body := map[string]uint{"base_contact_id": s.contact1.ID, "mergee_contact_id": s.contact2.ID}
	b, _ := json.Marshal(body)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/actions/contact_merge", bytes.NewBuffer(b))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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