package v1

import (
	"bytes"
	"encoding/json"
	"fmt"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"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"
	"github.com/gochat/gochat/pkg/crypto"
	"github.com/gochat/gochat/pkg/response"
)

// --- Profile Handler Test Suite ---
// Uses real SQLite DB + real repos + real service.

type ProfileHandlerTestSuite struct {
	suite.Suite
	router  *gin.Engine
	handler *ProfileHandler
	db      *gorm.DB
	user    *model.User
	account *model.Account

	userID    uint
	accountID uint
}

func TestProfileHandlerSuite(t *testing.T) {
	suite.Run(t, new(ProfileHandlerTestSuite))
}

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

	// Create in-memory SQLite DB
	db, err := gorm.Open(sqlite.Open("file::memory:"), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	s.Require().NoError(err)

	// Migrate models needed for profile operations
	s.Require().NoError(db.AutoMigrate(
		&model.Account{},
		&model.User{},
		&model.AccountUser{},
		&model.CustomRole{},
		&model.AccessToken{},
	))
	s.db = db

	// Create test account
	account := &model.Account{Name: "TestAccount", Status: "active", OnboardingStep: "profile"}
	s.Require().NoError(db.Create(account).Error)
	s.account = account
	s.accountID = account.ID

	// Create test user
	passwordDigest, err := crypto.HashPassword("oldpassword")
	s.Require().NoError(err)
	user := &model.User{
		Name:             "ProfileUser",
		Email:            "profile@example.com",
		AccountID:        account.ID,
		Password:         passwordDigest,
		PasswordDigest:   passwordDigest,
		Provider:         "email",
		DisplayName:      "Profile Display",
		MessageSignature: "Regards",
		PubsubToken:      "pubsub-profile-user",
	}
	s.Require().NoError(db.Create(user).Error)
	s.user = user
	s.userID = user.ID

	// Link user to account
	accountUser := &model.AccountUser{AccountID: account.ID, UserID: user.ID, Role: "administrator", Availability: "offline", AutoOffline: true}
	s.Require().NoError(db.Create(accountUser).Error)
	s.Require().NoError(db.Create(&model.AccessToken{OwnerType: model.AccessTokenOwnerTypeUser, OwnerID: user.ID, Token: "profile-token-1", TokenPrefix: "profile-", Name: "Personal Access Token"}).Error)

	// Create real repos + service
	userRepo := repository.NewUserRepo(db)
	accountUserRepo := repository.NewAccountUserRepo(db)
	accessTokenRepo := repository.NewAccessTokenRepo(db)
	profileSvc := service.NewProfileService(userRepo, accountUserRepo, accessTokenRepo)
	s.handler = NewProfileHandler(profileSvc)

	// Build router with profile routes and auth middleware
	s.router = s.buildRouter()
}

func (s *ProfileHandlerTestSuite) buildRouter() *gin.Engine {
	r := gin.New()

	// Auth middleware that sets user_id in context
	authMW := func(c *gin.Context) {
		c.Set("user_id", s.userID)
		c.Set("account_id", s.accountID)
		c.Next()
	}

	profile := r.Group("/api/v1/profile")
	profile.Use(authMW)
	profile.GET("", s.handler.Get)
	profile.PUT("", s.handler.Update)
	profile.PUT("/avatar", s.handler.UpdateAvatar)
	profile.POST("/availability", s.handler.SetAvailability)
	profile.POST("/auto_offline", s.handler.SetAutoOffline)
	profile.PUT("/set_active_account", s.handler.SetActiveAccount)
	profile.POST("/resend_confirmation", s.handler.ResendConfirmation)
	profile.POST("/reset_access_token", s.handler.ResetAccessToken)

	return r
}

func (s *ProfileHandlerTestSuite) SetupTest() {
	passwordDigest, err := crypto.HashPassword("oldpassword")
	s.Require().NoError(err)
	// Reset user to original state before each test
	s.db.Model(&model.User{}).Where("id = ?", s.userID).Updates(map[string]interface{}{
		"name":              "ProfileUser",
		"email":             "profile@example.com",
		"password":          passwordDigest,
		"password_digest":   passwordDigest,
		"avatar_url":        "",
		"available":         false,
		"display_name":      "Profile Display",
		"message_signature": "Regards",
		"pubsub_token":      "pubsub-profile-user",
	})
	s.db.Model(&model.AccountUser{}).Where("account_id = ? AND user_id = ?", s.accountID, s.userID).Updates(map[string]interface{}{
		"role":           "administrator",
		"custom_role_id": 0,
		"availability":   "offline",
		"auto_offline":   true,
	})
	s.db.Unscoped().Where("account_id = ?", s.accountID).Delete(&model.CustomRole{})
	s.db.Unscoped().Where("owner_type = ? AND owner_id = ?", model.AccessTokenOwnerTypeUser, s.userID).Delete(&model.AccessToken{})
	s.Require().NoError(s.db.Create(&model.AccessToken{OwnerType: model.AccessTokenOwnerTypeUser, OwnerID: s.userID, Token: "profile-token-1", TokenPrefix: "profile-", Name: "Personal Access Token"}).Error)
}

func (s *ProfileHandlerTestSuite) decodeProfileBody(w *httptest.ResponseRecorder) map[string]interface{} {
	var payload map[string]interface{}
	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &payload))
	return payload
}

func (s *ProfileHandlerTestSuite) firstAccountFromProfile(payload map[string]interface{}) map[string]interface{} {
	accounts, ok := payload["accounts"].([]interface{})
	s.Require().True(ok)
	s.Require().Len(accounts, 1)
	account, ok := accounts[0].(map[string]interface{})
	s.Require().True(ok)
	return account
}

// ===================== Get Profile =====================

func (s *ProfileHandlerTestSuite) TestGet_Success() {
	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "ProfileUser", dataMap["name"])
	assert.Equal(s.T(), "profile@example.com", dataMap["email"])
	assert.Equal(s.T(), "profile-token-1", dataMap["access_token"])
	assert.Equal(s.T(), "Profile Display", dataMap["available_name"])
	assert.Equal(s.T(), "Regards", dataMap["message_signature"])
	assert.Equal(s.T(), "pubsub-profile-user", dataMap["pubsub_token"])
	assert.Equal(s.T(), "administrator", dataMap["role"])
	accounts, ok := dataMap["accounts"].([]interface{})
	assert.True(s.T(), ok)
	if assert.Len(s.T(), accounts, 1) {
		account := accounts[0].(map[string]interface{})
		assert.Equal(s.T(), "TestAccount", account["name"])
		assert.Equal(s.T(), "offline", account["availability"])
		assert.Equal(s.T(), "offline", account["availability_status"])
		assert.Equal(s.T(), true, account["auto_offline"])
		assert.Equal(s.T(), []interface{}{"administrator"}, account["permissions"])
	}
}

func (s *ProfileHandlerTestSuite) TestGet_CustomRolePermissions() {
	role := &model.CustomRole{AccountID: s.accountID, Name: "Support Lead"}
	s.Require().NoError(role.SetPermissionKeys([]model.PermissionDimension{
		model.DimensionConversationManage,
		model.DimensionContactManage,
	}))
	s.Require().NoError(s.db.Create(role).Error)
	s.Require().NoError(s.db.Model(&model.AccountUser{}).
		Where("account_id = ? AND user_id = ?", s.accountID, s.userID).
		Updates(map[string]interface{}{"role": "agent", "custom_role_id": role.ID}).Error)

	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	account := s.firstAccountFromProfile(payload)
	assert.Equal(s.T(), "agent", account["role"])
	assert.Equal(s.T(), []interface{}{"conversation_manage", "contact_manage", "custom_role"}, account["permissions"])
	assert.Equal(s.T(), float64(role.ID), account["custom_role_id"])
	customRole := account["custom_role"].(map[string]interface{})
	assert.Equal(s.T(), "Support Lead", customRole["name"])
	assert.Equal(s.T(), []interface{}{"conversation_manage", "contact_manage"}, customRole["permissions"])
}

func (s *ProfileHandlerTestSuite) TestGet_Unauthorized() {
	// Create router without auth middleware — user_id will be 0
	r := gin.New()
	r.GET("/api/v1/profile", s.handler.Get)

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

	assert.Equal(s.T(), http.StatusUnauthorized, w.Code)

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.NotNil(s.T(), resp.Error)
	assert.Equal(s.T(), response.ErrUnauthorized, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestGet_UserNotFound() {
	// Router that sets a non-existent user ID
	r := gin.New()
	r.GET("/api/v1/profile", func(c *gin.Context) {
		c.Set("user_id", uint(9999)) // non-existent
		c.Next()
	}, s.handler.Get)

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

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.NotNil(s.T(), resp.Error)
	assert.Equal(s.T(), response.ErrNotFound, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestGet_NilService() {
	// Handler with nil service should panic or return 500
	h := &ProfileHandler{svc: nil}
	r := gin.New()
	r.GET("/api/v1/profile", func(c *gin.Context) {
		c.Set("user_id", uint(1))
		c.Next()
	}, h.Get)

	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	w := httptest.NewRecorder()

	// Expect panic from nil service call — recover and check
	func() {
		defer func() {
			_ = recover()
		}()
		r.ServeHTTP(w, req)
	}()
	// If no panic, it would be 500; if panic, we caught it
	// This test validates that nil svc is catastrophic
}

// ===================== Update Profile =====================

func (s *ProfileHandlerTestSuite) TestUpdate_Success() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"name":         "UpdatedName",
			"availability": "online",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "UpdatedName", dataMap["name"])
}

func (s *ProfileHandlerTestSuite) TestUpdate_SuccessWithEmail() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"email": "newemail@example.com",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "newemail@example.com", dataMap["email"])
}

func (s *ProfileHandlerTestSuite) TestUpdate_SuccessWithAvailabilityOffline() {
	// First set user available=true, then set availability=offline
	s.db.Model(&model.User{}).Where("id = ?", s.userID).Update("available", true)

	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"availability": "offline",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_SuccessWithAvailabilityBusy() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"availability": "busy",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_SuccessWithAvatarURL() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"avatar_url": "https://example.com/avatar.png",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_SuccessEmptyBody() {
	// Empty body binds as zero values — all fields are omitempty so validation passes
	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader([]byte("{}")))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_Unauthorized() {
	r := gin.New()
	r.PUT("/api/v1/profile", s.handler.Update)

	body, _ := json.Marshal(map[string]interface{}{"name": "Test"})
	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusUnauthorized, w.Code)

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(s.T(), response.ErrUnauthorized, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_InvalidJSON() {
	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader([]byte("{invalid json}")))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrBadRequest, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_ValidationFail_InvalidAvailability() {
	// Availability must be one of: online, offline, busy
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"availability": "invalid_status",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrValidation, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_ValidationFail_InvalidEmail() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"email": "not-an-email",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrValidation, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_ValidationFail_NameTooShort() {
	// Name with min=2, sending "a" (1 char) should fail validation
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"name": "a",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrValidation, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_UserNotFound() {
	r := gin.New()
	r.PUT("/api/v1/profile", func(c *gin.Context) {
		c.Set("user_id", uint(9999)) // non-existent
		c.Next()
	}, s.handler.Update)

	body := map[string]interface{}{"profile": map[string]interface{}{"name": "TestName"}}
	b, _ := json.Marshal(body)

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

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(s.T(), response.ErrNotFound, resp.Error.Code)
}

// ===================== Update Avatar =====================

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_Success() {
	body := map[string]interface{}{
		"avatar_url": "https://cdn.example.com/new-avatar.png",
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "https://cdn.example.com/new-avatar.png", dataMap["avatar_url"])
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_Unauthorized() {
	r := gin.New()
	r.PUT("/api/v1/profile/avatar", s.handler.UpdateAvatar)

	body := map[string]interface{}{"avatar_url": "https://example.com/a.png"}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusUnauthorized, w.Code)

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(s.T(), response.ErrUnauthorized, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_InvalidJSON() {
	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader([]byte("not json")))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(s.T(), response.ErrBadRequest, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_MissingAvatarURL() {
	// UpdateAvatarRequest has validate:"required" on avatar_url
	// NOTE: ShouldBindJSON does NOT trigger validate tags.
	// Empty body binds as zero-value struct (AvatarURL=""), then service validation fails.
	body := map[string]interface{}{}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// The service validates required and returns validation error,
	// which handleServiceError maps to 400 validation error
	assert.Equal(s.T(), http.StatusBadRequest, w.Code)

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrValidation, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_EmptyAvatarURL() {
	// Explicitly sending avatar_url as empty string
	body := map[string]interface{}{
		"avatar_url": "",
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Service validation: required field fails for empty string
	assert.Equal(s.T(), http.StatusBadRequest, w.Code)

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.False(s.T(), resp.Success)
	assert.Equal(s.T(), response.ErrValidation, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_UserNotFound() {
	r := gin.New()
	r.PUT("/api/v1/profile/avatar", func(c *gin.Context) {
		c.Set("user_id", uint(9999)) // non-existent
		c.Next()
	}, s.handler.UpdateAvatar)

	body := map[string]interface{}{"avatar_url": "https://example.com/a.png"}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

	var resp response.APIResponse
	assert.NoError(s.T(), json.Unmarshal(w.Body.Bytes(), &resp))
	assert.Equal(s.T(), response.ErrNotFound, resp.Error.Code)
}

func (s *ProfileHandlerTestSuite) TestUpdateAvatar_NilService() {
	h := &ProfileHandler{svc: nil}
	r := gin.New()
	r.PUT("/api/v1/profile/avatar", func(c *gin.Context) {
		c.Set("user_id", uint(1))
		c.Next()
	}, h.UpdateAvatar)

	body := map[string]interface{}{"avatar_url": "https://example.com/a.png"}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile/avatar", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()

	func() {
		defer func() {
			_ = recover()
		}()
		r.ServeHTTP(w, req)
	}()
	// Nil service causes panic — validates catastrophic failure path
}

// ===================== Chatwoot Profile Serializer Fixtures =====================

func (s *ProfileHandlerTestSuite) TestSetAvailability_ReturnsChatwootUserSerializer() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"account_id":   s.accountID,
			"availability": "online",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("POST", "/api/v1/profile/availability", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	assert.Equal(s.T(), "ProfileUser", payload["name"])
	assert.Equal(s.T(), "administrator", payload["role"])
	account := s.firstAccountFromProfile(payload)
	assert.Equal(s.T(), "online", account["availability"])
	assert.Equal(s.T(), "online", account["availability_status"])
}

func (s *ProfileHandlerTestSuite) TestSetAutoOffline_ReturnsChatwootUserSerializer() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"account_id":   s.accountID,
			"auto_offline": false,
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("POST", "/api/v1/profile/auto_offline", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	account := s.firstAccountFromProfile(payload)
	assert.Equal(s.T(), false, account["auto_offline"])
}

func (s *ProfileHandlerTestSuite) TestResetAccessToken_RegeneratesTokenInChatwootUserSerializer() {
	req, _ := http.NewRequest("POST", "/api/v1/profile/reset_access_token", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	token, ok := payload["access_token"].(string)
	assert.True(s.T(), ok)
	assert.NotEmpty(s.T(), token)
	assert.NotEqual(s.T(), "profile-token-1", token)
}

// ===================== Edge Cases =====================

func (s *ProfileHandlerTestSuite) TestNewProfileHandler() {
	svc := service.NewProfileService(repository.NewUserRepo(s.db), repository.NewAccountUserRepo(s.db))
	h := NewProfileHandler(svc)
	assert.NotNil(s.T(), h)
	assert.NotNil(s.T(), h.svc)
}

func (s *ProfileHandlerTestSuite) TestGet_ViaHeaderUserID() {
	// getUserID also checks X-User-ID header as fallback
	r := gin.New()
	r.GET("/api/v1/profile", s.handler.Get)

	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	req.Header.Set("X-User-ID", strconvFormatUint(s.userID))
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "ProfileUser", dataMap["name"])
}

func (s *ProfileHandlerTestSuite) TestGet_ZeroUserIDViaHeader() {
	// X-User-ID set to 0 should still result in unauthorized
	r := gin.New()
	r.GET("/api/v1/profile", s.handler.Get)

	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	req.Header.Set("X-User-ID", "0")
	w := httptest.NewRecorder()
	r.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_NoContentTypeHeader() {
	// Sending JSON body without Content-Type — ShouldBindJSON may still parse it
	// in Gin test mode depending on version. Verify the behavior.
	body, _ := json.Marshal(map[string]interface{}{"profile": map[string]interface{}{"name": "TestName"}})
	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(body))
	// No Content-Type header set
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	// Gin ShouldBindJSON requires Content-Type application/json — without it,
	// binding fails and the handler returns 400. But some Gin versions auto-detect.
	// Accept either 400 (binding fail) or 200 (if Gin auto-binds):
	code := w.Code
	assert.True(s.T(), code == http.StatusBadRequest || code == http.StatusOK,
		"expected either 400 (binding fail) or 200 (auto-bind), got %d", code)
}

func (s *ProfileHandlerTestSuite) TestUpdate_MultipleFieldsAtOnce() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"name":         "MultiUpdate",
			"email":        "multi@example.com",
			"avatar_url":   "https://example.com/multi.png",
			"availability": "online",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	dataMap := s.decodeProfileBody(w)
	assert.Equal(s.T(), "MultiUpdate", dataMap["name"])
	assert.Equal(s.T(), "multi@example.com", dataMap["email"])
	assert.Equal(s.T(), "https://example.com/multi.png", dataMap["avatar_url"])
}

func (s *ProfileHandlerTestSuite) TestUpdate_SettingsJSONParity() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"display_name":      "Display Changed",
			"message_signature": "Kind regards",
			"phone_number":      "+15551234567",
			"ui_settings": map[string]interface{}{
				"editor_message_key":        "cmd_enter",
				"conversation_display_type": "expanded",
			},
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	assert.Equal(s.T(), "Display Changed", payload["display_name"])
	assert.Equal(s.T(), "Display Changed", payload["available_name"])
	assert.Equal(s.T(), "Kind regards", payload["message_signature"])
	uiSettings := payload["ui_settings"].(map[string]interface{})
	assert.Equal(s.T(), "cmd_enter", uiSettings["editor_message_key"])
	customAttrs := payload["custom_attributes"].(map[string]interface{})
	assert.Equal(s.T(), "+15551234567", customAttrs["phone_number"])
}

func (s *ProfileHandlerTestSuite) TestUpdate_PasswordJSONParity() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"current_password":      "oldpassword",
			"password":              "newpassword",
			"password_confirmation": "newpassword",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	var user model.User
	s.Require().NoError(s.db.First(&user, s.userID).Error)
	assert.True(s.T(), crypto.CheckPassword("newpassword", user.PasswordDigest))
}

func (s *ProfileHandlerTestSuite) TestUpdate_PasswordInvalidCurrentPassword() {
	body := map[string]interface{}{
		"profile": map[string]interface{}{
			"current_password":      "wrongpassword",
			"password":              "newpassword",
			"password_confirmation": "newpassword",
		},
	}
	b, _ := json.Marshal(body)

	req, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(b))
	req.Header.Set("Content-Type", "application/json")
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

func (s *ProfileHandlerTestSuite) TestUpdate_MultipartFormProfileParity() {
	var body bytes.Buffer
	writer := multipart.NewWriter(&body)
	s.Require().NoError(writer.WriteField("profile[name]", "Multipart User"))
	s.Require().NoError(writer.WriteField("profile[display_name]", "Multipart Display"))
	s.Require().NoError(writer.WriteField("profile[message_signature]", "Sent from multipart"))
	s.Require().NoError(writer.WriteField("profile[ui_settings][editor_message_key]", "enter"))
	fileWriter, err := writer.CreateFormFile("profile[avatar]", "avatar.png")
	s.Require().NoError(err)
	_, err = fileWriter.Write([]byte("fake image bytes"))
	s.Require().NoError(err)
	s.Require().NoError(writer.Close())

	req, _ := http.NewRequest("PUT", "/api/v1/profile", &body)
	req.Header.Set("Content-Type", writer.FormDataContentType())
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

	assert.Equal(s.T(), http.StatusOK, w.Code)
	payload := s.decodeProfileBody(w)
	assert.Equal(s.T(), "Multipart User", payload["name"])
	assert.Equal(s.T(), "Multipart Display", payload["display_name"])
	assert.Equal(s.T(), "Sent from multipart", payload["message_signature"])
	assert.Equal(s.T(), "avatar.png", payload["avatar_url"])
	uiSettings := payload["ui_settings"].(map[string]interface{})
	assert.Equal(s.T(), "enter", uiSettings["editor_message_key"])
}

func (s *ProfileHandlerTestSuite) TestUpdate_SoftDeletedUser() {
	// Soft-delete user, then try to get/update profile
	s.db.Delete(&model.User{}, s.userID)

	// Get should return not found
	req, _ := http.NewRequest("GET", "/api/v1/profile", nil)
	w := httptest.NewRecorder()
	s.router.ServeHTTP(w, req)

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

	// Update should return not found
	body, _ := json.Marshal(map[string]interface{}{"name": "AfterDelete"})
	req2, _ := http.NewRequest("PUT", "/api/v1/profile", bytes.NewReader(body))
	req2.Header.Set("Content-Type", "application/json")
	w2 := httptest.NewRecorder()
	s.router.ServeHTTP(w2, req2)

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

	// Restore user for subsequent tests
	s.db.Model(&model.User{}).Where("id = ?", s.userID).Unscoped().Update("deleted_at", nil)
}

// strconvFormatUint helper for X-User-ID header tests
func strconvFormatUint(n uint) string {
	return fmt.Sprintf("%d", n)
}