package model

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

// setupModelTestDB creates an in-memory SQLite database with core model tables.
func setupModelTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	if err != nil {
		t.Fatalf("failed to open test db: %v", err)
	}
	err = db.AutoMigrate(
		&Account{},
		&User{},
		&AccountUser{},
		&Inbox{},
		&Contact{},
		&ContactInbox{},
		&Conversation{},
		&Message{},
		&Attachment{},
		&Notification{},
		&CustomRole{},
		&PlatformApp{},
	)
	if err != nil {
		t.Fatalf("failed to migrate: %v", err)
	}
	return db
}

func cleanupDB(t *testing.T, db *gorm.DB) {
	t.Helper()
	sqlDB, err := db.DB()
	if err != nil {
		t.Fatalf("failed to get sql.DB: %v", err)
	}
	sqlDB.Close()
}

// --- Account CRUD Tests ---

func TestAccount_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	account := &Account{Name: "TestOrg", Locale: "en", Timezone: "UTC", Active: true}
	err := db.Create(account).Error
	assert.NoError(t, err)
	assert.NotZero(t, account.ID)
	assert.Equal(t, "TestOrg", account.Name)
	assert.Equal(t, "en", account.Locale)
	assert.Equal(t, "UTC", account.Timezone)
	assert.True(t, account.Active)
	assert.Equal(t, "active", account.Status)
}

func TestAccount_GetByID(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "LookupOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	var found Account
	err := db.First(&found, acc.ID).Error
	assert.NoError(t, err)
	assert.Equal(t, "LookupOrg", found.Name)
	assert.Equal(t, acc.ID, found.ID)
}

func TestAccount_Update(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "UpdateOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	acc.Name = "UpdatedOrg"
	acc.Domain = "updated.example.com"
	err := db.Save(acc).Error
	assert.NoError(t, err)

	var found Account
	db.First(&found, acc.ID)
	assert.Equal(t, "UpdatedOrg", found.Name)
	assert.Equal(t, "updated.example.com", found.Domain)
}

func TestAccount_SoftDelete(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "DeleteOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	err := db.Delete(acc).Error
	assert.NoError(t, err)

	var found Account
	err = db.First(&found, acc.ID).Error
	assert.Error(t, err)
	assert.Equal(t, gorm.ErrRecordNotFound, err)
}

func TestAccount_FeatureFlags(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{
		Name:          "FlagsOrg",
		Locale:        "en",
		Timezone:      "UTC",
		Active:        true,
		FeatureFlags:  `{"auto_resolve":true,"copilot":false}`,
		AutoResolveDuration: 7,
	}
	err := db.Create(acc).Error
	assert.NoError(t, err)

	var found Account
	db.First(&found, acc.ID)
	assert.Equal(t, `{"auto_resolve":true,"copilot":false}`, found.FeatureFlags)
	assert.Equal(t, 7, found.AutoResolveDuration)
}

// --- User CRUD Tests ---

func TestUser_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "UserOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	user := &User{
		AccountID: acc.ID,
		Name:      "John Agent",
		Email:     "john@example.com",
		Password:  "hashed_password_placeholder",
		Provider:  "email",
		Role:      string(AccountUserRoleAgent),
		Active:    true,
	}
	err := db.Create(user).Error
	assert.NoError(t, err)
	assert.NotZero(t, user.ID)
	assert.Equal(t, acc.ID, user.AccountID)
	assert.Equal(t, "John Agent", user.Name)
	assert.Equal(t, "john@example.com", user.Email)
}

func TestUser_UpdateRole(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "RoleOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	user := &User{
		AccountID: acc.ID,
		Name:      "AgentUser",
		Email:     "agent_role@example.com",
		Password:  "hashed",
		Provider:  "email",
		Role:      string(AccountUserRoleAgent),
		Active:    true,
	}
	db.Create(user)

	user.Role = string(AccountUserRoleAdministrator)
	err := db.Save(user).Error
	assert.NoError(t, err)

	var found User
	db.First(&found, user.ID)
	assert.Equal(t, string(AccountUserRoleAdministrator), found.Role)
}

func TestUser_TOTPFields(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "TOTPOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	user := &User{
		AccountID:   acc.ID,
		Name:        "TOTP User",
		Email:       "totp@example.com",
		Password:    "hashed",
		Provider:    "email",
		Role:        string(AccountUserRoleAgent),
		Active:      true,
		TOTPSecret:  "JBSWY3DPEHPK3PXP",
		TOTPEnabled: true,
	}
	err := db.Create(user).Error
	assert.NoError(t, err)

	var found User
	db.First(&found, user.ID)
	assert.Equal(t, "JBSWY3DPEHPK3PXP", found.TOTPSecret)
	assert.True(t, found.TOTPEnabled)
}

// --- AccountUser Tests ---

func TestAccountUser_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "AssocOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)
	user := &User{
		AccountID: acc.ID, Name: "AssocUser", Email: "assoc@example.com",
		Password: "hashed", Provider: "email", Role: string(AccountUserRoleAgent), Active: true,
	}
	db.Create(user)

	au := &AccountUser{
		UserID:      user.ID,
		AccountID:   acc.ID,
		Role:        string(AccountUserRoleAgent),
		Availability: "online",
	}
	err := db.Create(au).Error
	assert.NoError(t, err)
	assert.NotZero(t, au.ID)
	assert.Equal(t, user.ID, au.UserID)
	assert.Equal(t, acc.ID, au.AccountID)
}

func TestAccountUser_IsAdministrator(t *testing.T) {
	au := &AccountUser{Role: string(AccountUserRoleAdministrator)}
	assert.True(t, au.IsAdministrator())

	au2 := &AccountUser{Role: string(AccountUserRoleAgent)}
	assert.False(t, au2.IsAdministrator())
}

// --- Inbox CRUD Tests ---

func TestInbox_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "InboxOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	inbox := &Inbox{
		AccountID:           acc.ID,
		Name:                "Support",
		ChannelType:         "web_widget",
		ChannelID:           1,
		EnableAutoAssignment: false,
		AutoAssignmentLimit:  0,
	}
	err := db.Create(inbox).Error
	assert.NoError(t, err)
	assert.NotZero(t, inbox.ID)
	assert.Equal(t, acc.ID, inbox.AccountID)
	assert.Equal(t, "Support", inbox.Name)
	assert.Equal(t, "web_widget", inbox.ChannelType)
}

// --- Conversation CRUD Tests ---

func TestConversation_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "ConvOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	contact := &Contact{AccountID: acc.ID, Name: "Test Contact"}
	db.Create(contact)

	inbox := &Inbox{
		AccountID: acc.ID, Name: "Chat", ChannelType: "web_widget", ChannelID: 1,
	}
	db.Create(inbox)

	conv := &Conversation{
		AccountID:   acc.ID,
		InboxID:     inbox.ID,
		ContactID:   contact.ID,
		Status:      string(ConversationStatusOpen),
		ChannelType: "web_widget",
		Channel:     "web_widget",
	}
	err := db.Create(conv).Error
	assert.NoError(t, err)
	assert.NotZero(t, conv.ID)
	assert.Equal(t, string(ConversationStatusOpen), conv.Status)
}

// --- Message CRUD Tests ---

func TestMessage_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "MsgOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)
	contact := &Contact{AccountID: acc.ID, Name: "Msg Contact"}
	db.Create(contact)
	inbox := &Inbox{
		AccountID: acc.ID, Name: "Chat", ChannelType: "web_widget", ChannelID: 1,
	}
	db.Create(inbox)
	conv := &Conversation{
		AccountID: acc.ID, InboxID: inbox.ID, ContactID: contact.ID,
		Status: string(ConversationStatusOpen), ChannelType: "web_widget", Channel: "web_widget",
	}
	db.Create(conv)

	msg := &Message{
		ConversationID: conv.ID,
		AccountID:      acc.ID,
		InboxID:        inbox.ID,
		SenderType:     "contact",
		Content:        "Hello world",
		ContentType:    "text",
		MessageType:    "incoming",
	}
	err := db.Create(msg).Error
	assert.NoError(t, err)
	assert.NotZero(t, msg.ID)
	assert.Equal(t, "Hello world", msg.Content)
	assert.Equal(t, "incoming", msg.MessageType)
	assert.Equal(t, "contact", msg.SenderType)
}

// --- Contact CRUD Tests ---

func TestContact_Create(t *testing.T) {
	db := setupModelTestDB(t)
	defer cleanupDB(t, db)

	acc := &Account{Name: "ContactOrg", Locale: "en", Timezone: "UTC", Active: true}
	db.Create(acc)

	contact := &Contact{
		AccountID:   acc.ID,
		Name:        "Jane Doe",
		Email:       "jane@example.com",
		PhoneNumber: "+1234567890",
	}
	err := db.Create(contact).Error
	assert.NoError(t, err)
	assert.NotZero(t, contact.ID)
	assert.Equal(t, "Jane Doe", contact.Name)
}

// --- Enum Tests ---

func TestConversationStatus_Values(t *testing.T) {
	assert.Equal(t, "open", string(ConversationStatusOpen))
	assert.Equal(t, "resolved", string(ConversationStatusResolved))
	assert.Equal(t, "pending", string(ConversationStatusPending))
	assert.Equal(t, "snoozed", string(ConversationStatusSnoozed))
}

func TestMessageType_Values(t *testing.T) {
	assert.Equal(t, "incoming", string(MessageTypeIncoming))
	assert.Equal(t, "outgoing", string(MessageTypeOutgoing))
	assert.Equal(t, "activity", string(MessageTypeActivity))
}

func TestAccountUserRole_Values(t *testing.T) {
	assert.Equal(t, "agent", string(AccountUserRoleAgent))
	assert.Equal(t, "administrator", string(AccountUserRoleAdministrator))
}

func TestMessageContentType_Values(t *testing.T) {
	assert.Equal(t, "text", string(MessageContentTypeText))
}

// --- PlatformApp Tests ---

func uintPtr(v uint) *uint { return &v }

func TestPlatformApp_IsPlatformLevel(t *testing.T) {
	pa := &PlatformApp{AccountID: nil}
	assert.True(t, pa.IsPlatformLevel())

	pa2 := &PlatformApp{AccountID: uintPtr(1)}
	assert.False(t, pa2.IsPlatformLevel())
}

// --- CustomRole Permission Level Tests (using model's own constants) ---

func TestPermissionLevel_Constants(t *testing.T) {
	assert.Equal(t, "full", string(PermissionLevelFull))
	assert.Equal(t, "read", string(PermissionLevelRead))
	assert.Equal(t, "none", string(PermissionLevelNone))
}

func TestPermissionDimension_Constants(t *testing.T) {
	assert.Equal(t, "conversation_manage", string(DimensionConversationManage))
	assert.Equal(t, "conversation_delete", string(DimensionConversationDelete))
	assert.Equal(t, "contact_manage", string(DimensionContactManage))
	assert.Equal(t, "report_manage", string(DimensionReportManage))
	assert.Equal(t, "knowledge_base_manage", string(DimensionKnowledgeBaseManage))
	assert.Equal(t, "automation_manage", string(DimensionAutomationManage))
}