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 TeamHandlerTestSuite struct {
	suite.Suite
	db      *gorm.DB
	handler *TeamHandler
	account *model.Account
}

func (s *TeamHandlerTestSuite) 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.Team{}, &model.TeamMember{}))
	s.db = db

	teamRepo := repository.NewTeamRepo(db)
	teamMemberRepo := repository.NewTeamMemberRepo(db)
	svc := service.NewTeamService(teamRepo, teamMemberRepo, s.db)
	s.handler = NewTeamHandler(svc)

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

func (s *TeamHandlerTestSuite) SetupTest() {
	s.db.Exec("DELETE FROM teams")
}

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

func TestTeamHandlerSuite(t *testing.T) {
	suite.Run(t, new(TeamHandlerTestSuite))
}

func (s *TeamHandlerTestSuite) authMiddleware(c *gin.Context) {
	c.Set("account_id", uint(s.account.ID))
}

func (s *TeamHandlerTestSuite) TestList_Success() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/teams", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.List(c)
	})

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

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var payload []map[string]any
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &payload))
}

func (s *TeamHandlerTestSuite) TestCreate_Success() {
	r := gin.New()
	r.POST("/api/v1/accounts/:account_id/teams", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Create(c)
	})

	w := httptest.NewRecorder()
	body := `{"name":"test-team","description":"a test team","allow_auto_assign":false}`
	req, _ := http.NewRequest("POST", fmt.Sprintf("/api/v1/accounts/%d/teams", s.account.ID), bytes.NewBufferString(body))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var payload map[string]any
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &payload))
	assert.Equal(s.T(), "test-team", payload["name"])
	assert.Equal(s.T(), false, payload["allow_auto_assign"])
}

func (s *TeamHandlerTestSuite) TestGet_Success() {
	team := &model.Team{AccountID: s.account.ID, Name: "get-test-team"}
	s.Require().NoError(s.db.Create(team).Error)

	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/teams/:id", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Get(c)
	})

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

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var payload map[string]any
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &payload))
	assert.Equal(s.T(), "get-test-team", payload["name"])
	assert.Contains(s.T(), payload, "is_member")
}

func (s *TeamHandlerTestSuite) TestGet_TeamIDParamSuccess() {
	team := &model.Team{AccountID: s.account.ID, Name: "team-id-param"}
	s.Require().NoError(s.db.Create(team).Error)

	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/teams/:team_id", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Get(c)
	})

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

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

func (s *TeamHandlerTestSuite) TestUpdate_Success() {
	team := &model.Team{AccountID: s.account.ID, Name: "update-test-team"}
	s.Require().NoError(s.db.Create(team).Error)

	r := gin.New()
	r.PUT("/api/v1/accounts/:account_id/teams/:id", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Update(c)
	})

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

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var payload map[string]any
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &payload))
	assert.Equal(s.T(), "updated-team", payload["name"])
	assert.Equal(s.T(), false, payload["allow_auto_assign"])
}

func (s *TeamHandlerTestSuite) TestDelete_Success() {
	team := &model.Team{AccountID: s.account.ID, Name: "delete-test-team"}
	s.Require().NoError(s.db.Create(team).Error)

	r := gin.New()
	r.DELETE("/api/v1/accounts/:account_id/teams/:id", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Delete(c)
	})

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

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

func (s *TeamHandlerTestSuite) TestGet_BadRequest_InvalidID() {
	r := gin.New()
	r.GET("/api/v1/accounts/:account_id/teams/:id", func(c *gin.Context) {
		s.authMiddleware(c)
		s.handler.Get(c)
	})

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

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