package v1

import (
	"bytes"
	"encoding/json"
	"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 BannerHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *BannerHandler
}

func (s *BannerHandlerTestSuite) 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.Banner{}))
	s.db = db

	repo := repository.NewBannerRepo(db)
	svc := service.NewBannerService(repo)
	s.handler = NewBannerHandler(svc)
}

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

func TestBannerHandlerSuite(t *testing.T) {
	suite.Run(t, new(BannerHandlerTestSuite))
}

func (s *BannerHandlerTestSuite) TestList_Success() {
	r := gin.New()
	r.GET("/platform/api/v1/banners", s.handler.List)

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

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

func (s *BannerHandlerTestSuite) TestListActive_Success() {
	r := gin.New()
	r.GET("/platform/api/v1/banners/active", s.handler.ListActive)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/platform/api/v1/banners/active", nil)
	r.ServeHTTP(w, req)

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

func (s *BannerHandlerTestSuite) TestCreate_BadRequest_EmptyBody() {
	r := gin.New()
	r.POST("/platform/api/v1/banners", s.handler.Create)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/platform/api/v1/banners", nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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

func (s *BannerHandlerTestSuite) TestCreate_Success() {
	r := gin.New()
	r.POST("/platform/api/v1/banners", s.handler.Create)

	body := map[string]interface{}{
		"title":       "System Update",
		"content":     "New features available",
		"active":      true,
		"banner_type": "update",
		"created_by":  1,
	}
	b, _ := json.Marshal(body)

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

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

func (s *BannerHandlerTestSuite) TestGet_BadRequest_InvalidID() {
	r := gin.New()
	r.GET("/platform/api/v1/banners/:id", s.handler.Get)

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

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

func (s *BannerHandlerTestSuite) TestGet_NotFound() {
	r := gin.New()
	r.GET("/platform/api/v1/banners/:id", s.handler.Get)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/platform/api/v1/banners/99999", nil)
	r.ServeHTTP(w, req)

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

func (s *BannerHandlerTestSuite) TestUpdate_BadRequest_InvalidID() {
	r := gin.New()
	r.PUT("/platform/api/v1/banners/:id", s.handler.Update)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("PUT", "/platform/api/v1/banners/abc", nil)
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

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

func (s *BannerHandlerTestSuite) TestDelete_BadRequest_InvalidID() {
	r := gin.New()
	r.DELETE("/platform/api/v1/banners/:id", s.handler.Delete)

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/platform/api/v1/banners/abc", nil)
	r.ServeHTTP(w, req)

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