package tests_test

import (
	"testing"

	. "github.com/jinzhu/gorm/tests"
)

func AssertAssociationCount(t *testing.T, data interface{}, name string, result int64, reason string) {
	if count := DB.Model(data).Association(name).Count(); count != result {
		t.Errorf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
	}

	var newUser User
	if user, ok := data.(User); ok {
		DB.Find(&newUser, "id = ?", user.ID)
	} else if user, ok := data.(*User); ok {
		DB.Find(&newUser, "id = ?", user.ID)
	}

	if newUser.ID != 0 {
		if count := DB.Model(&newUser).Association(name).Count(); count != result {
			t.Errorf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
		}
	}
}

func TestBelongsToAssociation(t *testing.T) {
	var user = *GetUser("belongs-to", Config{Company: true, Manager: true})

	if err := DB.Create(&user).Error; err != nil {
		t.Fatalf("errors happened when create: %v", err)
	}

	CheckUser(t, user, user)

	// Find
	var user2 User
	DB.Find(&user2, "id = ?", user.ID)
	DB.Model(&user2).Association("Company").Find(&user2.Company)
	user2.Manager = &User{}
	DB.Model(&user2).Association("Manager").Find(user2.Manager)
	CheckUser(t, user2, user)

	// Count
	AssertAssociationCount(t, user, "Company", 1, "")
	AssertAssociationCount(t, user, "Manager", 1, "")

	// Append
	var company = Company{Name: "company-belongs-to-append"}
	var manager = GetUser("manager-belongs-to-append", Config{})

	if err := DB.Model(&user2).Association("Company").Append(&company); err != nil {
		t.Fatalf("Error happened when append Company, got %v", err)
	}

	if company.ID == 0 {
		t.Fatalf("Company's ID should be created")
	}

	if err := DB.Model(&user2).Association("Manager").Append(manager); err != nil {
		t.Fatalf("Error happened when append Manager, got %v", err)
	}

	if manager.ID == 0 {
		t.Fatalf("Manager's ID should be created")
	}

	user.Company = company
	user.Manager = manager
	user.CompanyID = &company.ID
	user.ManagerID = &manager.ID
	CheckUser(t, user2, user)

	AssertAssociationCount(t, user2, "Company", 1, "AfterAppend")
	AssertAssociationCount(t, user2, "Manager", 1, "AfterAppend")

	// Replace
	var company2 = Company{Name: "company-belongs-to-replace"}
	var manager2 = GetUser("manager-belongs-to-replace", Config{})

	if err := DB.Model(&user2).Association("Company").Replace(&company2); err != nil {
		t.Fatalf("Error happened when replace Company, got %v", err)
	}

	if company2.ID == 0 {
		t.Fatalf("Company's ID should be created")
	}

	if err := DB.Model(&user2).Association("Manager").Replace(manager2); err != nil {
		t.Fatalf("Error happened when replace Manager, got %v", err)
	}

	if manager2.ID == 0 {
		t.Fatalf("Manager's ID should be created")
	}

	user.Company = company2
	user.Manager = manager2
	user.CompanyID = &company2.ID
	user.ManagerID = &manager2.ID
	CheckUser(t, user2, user)

	AssertAssociationCount(t, user2, "Company", 1, "AfterReplace")
	AssertAssociationCount(t, user2, "Manager", 1, "AfterReplace")

	// Delete
	if err := DB.Model(&user2).Association("Company").Delete(&Company{}); err != nil {
		t.Fatalf("Error happened when delete Company, got %v", err)
	}
	AssertAssociationCount(t, user2, "Company", 1, "after delete non-existing data")

	if err := DB.Model(&user2).Association("Company").Delete(&company2); err != nil {
		t.Fatalf("Error happened when delete Company, got %v", err)
	}
	AssertAssociationCount(t, user2, "Company", 0, "after delete")

	if err := DB.Model(&user2).Association("Manager").Delete(&User{}); err != nil {
		t.Fatalf("Error happened when delete Manager, got %v", err)
	}
	AssertAssociationCount(t, user2, "Manager", 1, "after delete non-existing data")

	if err := DB.Model(&user2).Association("Manager").Delete(manager2); err != nil {
		t.Fatalf("Error happened when delete Manager, got %v", err)
	}
	AssertAssociationCount(t, user2, "Manager", 0, "after delete")

	// Prepare Data for Clear
	if err := DB.Model(&user2).Association("Company").Append(&company); err != nil {
		t.Fatalf("Error happened when append Company, got %v", err)
	}

	if err := DB.Model(&user2).Association("Manager").Append(manager); err != nil {
		t.Fatalf("Error happened when append Manager, got %v", err)
	}

	AssertAssociationCount(t, user2, "Company", 1, "after prepare data")
	AssertAssociationCount(t, user2, "Manager", 1, "after prepare data")

	// Clear
	if err := DB.Model(&user2).Association("Company").Clear(); err != nil {
		t.Errorf("Error happened when clear Company, got %v", err)
	}

	if err := DB.Model(&user2).Association("Manager").Clear(); err != nil {
		t.Errorf("Error happened when clear Manager, got %v", err)
	}

	AssertAssociationCount(t, user2, "Company", 0, "after clear")
	AssertAssociationCount(t, user2, "Manager", 0, "after clear")
}

func TestBelongsToAssociationForSlice(t *testing.T) {
	var users = []User{
		*GetUser("slice-belongs-to-1", Config{Company: true, Manager: true}),
		*GetUser("slice-belongs-to-2", Config{Company: true, Manager: false}),
		*GetUser("slice-belongs-to-3", Config{Company: true, Manager: true}),
	}

	DB.Create(&users)

	AssertAssociationCount(t, users, "Company", 3, "")
	AssertAssociationCount(t, users, "Manager", 2, "")

	// Find
	var companies []Company
	if DB.Model(users).Association("Company").Find(&companies); len(companies) != 3 {
		t.Errorf("companies count should be %v, but got %v", 3, len(companies))
	}

	var managers []User
	if DB.Model(users).Association("Manager").Find(&managers); len(managers) != 2 {
		t.Errorf("managers count should be %v, but got %v", 2, len(managers))
	}

	// Append

	// Replace

	// Delete

	// Clear
	DB.Model(&users).Association("Company").Clear()
	AssertAssociationCount(t, users, "Company", 0, "After Clear")

	DB.Model(&users).Association("Manager").Clear()
	AssertAssociationCount(t, users, "Manager", 0, "After Clear")
}