package gorm

import (
	"testing"
	"time"
)

type User struct {
	Id       int64
	Age      int64
	Birthday time.Time
	Name     string
}

var db DB

func init() {
	db, _ = Open("postgres", "user=gorm dbname=gorm sslmode=disable")
	db.Exec("drop table users;")
}

func TestCreateTable(t *testing.T) {
	orm := db.CreateTable(&User{})
	if orm.Error != nil {
		t.Errorf("No error should raise when create table, but got %+v", orm.Error)
	}
}

func TestSaveAndFind(t *testing.T) {
	name := "save_and_find"
	u := &User{Name: name}
	db.Save(u)
	if u.Id == 0 {
		t.Errorf("Should have ID after create record")
	}

	user := &User{}
	db.First(user)
	if user.Name != name {
		t.Errorf("User should be saved and fetched correctly")
	}

	users := []User{}
	db.Find(&users)
}

func TestUpdate(t *testing.T) {
	name, name2, new_name := "update", "update2", "new_update"
	user := User{Name: name}
	db.Save(&user)
	db.Save(&User{Name: name2})

	if user.Id == 0 {
		t.Errorf("User Id should exist after create")
	}

	user.Name = new_name
	db.Save(&user)
	orm := db.Where("name = ?", name).First(&User{})
	if orm.Error == nil {
		t.Errorf("Should raise error when looking for a existing user with an outdated name")
	}

	orm = db.Where("name = ?", new_name).First(&User{})
	if orm.Error != nil {
		t.Errorf("Shouldn't raise error when looking for a existing user with the new name")
	}

	orm = db.Where("name = ?", name2).First(&User{})
	if orm.Error != nil {
		t.Errorf("Shouldn't update other users")
	}
}

func TestDelete(t *testing.T) {
	name, name2 := "delete", "delete2"
	user := User{Name: name}
	db.Save(&user)
	db.Save(&User{Name: name2})
	orm := db.Delete(&user)

	orm = db.Where("name = ?", name).First(&User{})
	if orm.Error == nil {
		t.Errorf("User should be deleted successfully")
	}

	orm = db.Where("name = ?", name2).First(&User{})
	if orm.Error != nil {
		t.Errorf("User2 should not be deleted")
	}
}

func TestWhere(t *testing.T) {
	name := "where"
	db.Save(&User{Name: name})

	user := &User{}
	db.Where("Name = ?", name).First(user)
	if user.Name != name {
		t.Errorf("Should found out user with name '%v'", name)
	}

	user = &User{}
	orm := db.Where("Name = ?", "noexisting-user").First(user)
	if orm.Error == nil {
		t.Errorf("Should return error when looking for none existing record, %+v", user)
	}

	users := []User{}
	orm = db.Where("Name = ?", "none-noexisting").Find(&users)
	if orm.Error != nil {
		t.Errorf("Shouldn't return error when looking for none existing records, %+v", users)
	}
	if len(users) != 0 {
		t.Errorf("Shouldn't find anything when looking for none existing records, %+v", users)
	}
}

func TestComplexWhere(t *testing.T) {
	db.Save(&User{Name: "1", Age: 18})
	db.Save(&User{Name: "2", Age: 20})
	db.Save(&User{Name: "3", Age: 22})
	db.Save(&User{Name: "3", Age: 24})

	var users []User
	db.Where("age > ?", 20).Find(&users)
	if len(users) != 2 {
		t.Errorf("Should only found 2 users that age > 20, but have %v", len(users))
	}

	users = []User{}
	db.Where("age >= ?", 20).Find(&users)
	if len(users) != 3 {
		t.Errorf("Should only found 2 users that age >= 20, but have %v", len(users))
	}

	users = []User{}
	db.Where("age = ?", 20).Find(&users)
	if len(users) != 1 {
		t.Errorf("Should only found 1 users age == 20, but have %v", len(users))
	}

	users = []User{}
	db.Where("age <> ?", 20).Find(&users)
	if len(users) < 3 {
		t.Errorf("Should have more than 3 users age != 20, but have %v", len(users))
	}

	users = []User{}
	db.Where("name = ? and age >= ?", "3", 20).Find(&users)
	if len(users) != 2 {
		t.Errorf("Should only found 2 users that age >= 20 with name 3, but have %v", len(users))
	}

	users = []User{}
	db.Where("name = ?", "3").Where("age >= ?", 20).Find(&users)
	if len(users) != 2 {
		t.Errorf("Should only found 2 users that age >= 20 with name 3, but have %v", len(users))
	}
}