package tests_test

import (
	"reflect"
	"sort"
	"strconv"
	"testing"
	"time"

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

func TestFind(t *testing.T) {
	var users = []User{
		*GetUser("find", Config{}),
		*GetUser("find", Config{}),
		*GetUser("find", Config{}),
	}

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

	t.Run("First", func(t *testing.T) {
		var first User
		if err := DB.Where("name = ?", "find").First(&first).Error; err != nil {
			t.Errorf("errors happened when query first: %v", err)
		} else {
			CheckUser(t, first, users[0])
		}
	})

	t.Run("Last", func(t *testing.T) {
		var last User
		if err := DB.Where("name = ?", "find").Last(&last).Error; err != nil {
			t.Errorf("errors happened when query last: %v", err)
		} else {
			CheckUser(t, last, users[2])
		}
	})

	var all []User
	if err := DB.Where("name = ?", "find").Find(&all).Error; err != nil || len(all) != 3 {
		t.Errorf("errors happened when query find: %v, length: %v", err, len(all))
	} else {
		for idx, user := range users {
			t.Run("FindAll#"+strconv.Itoa(idx+1), func(t *testing.T) {
				CheckUser(t, all[idx], user)
			})
		}
	}

	t.Run("FirstMap", func(t *testing.T) {
		var first = map[string]interface{}{}
		if err := DB.Model(&User{}).Where("name = ?", "find").First(first).Error; err != nil {
			t.Errorf("errors happened when query first: %v", err)
		} else {
			for _, name := range []string{"Name", "Age", "Birthday"} {
				t.Run(name, func(t *testing.T) {
					dbName := DB.NamingStrategy.ColumnName("", name)
					reflectValue := reflect.Indirect(reflect.ValueOf(users[0]))
					AssertEqual(t, first[dbName], reflectValue.FieldByName(name).Interface())
				})
			}
		}
	})

	var allMap = []map[string]interface{}{}
	if err := DB.Model(&User{}).Where("name = ?", "find").Find(&allMap).Error; err != nil {
		t.Errorf("errors happened when query first: %v", err)
	} else {
		for idx, user := range users {
			t.Run("FindAllMap#"+strconv.Itoa(idx+1), func(t *testing.T) {
				for _, name := range []string{"Name", "Age", "Birthday"} {
					t.Run(name, func(t *testing.T) {
						dbName := DB.NamingStrategy.ColumnName("", name)
						reflectValue := reflect.Indirect(reflect.ValueOf(user))
						AssertEqual(t, allMap[idx][dbName], reflectValue.FieldByName(name).Interface())
					})
				}
			})
		}
	}
}

func TestFillSmallerStruct(t *testing.T) {
	user := User{Name: "SmallerUser", Age: 100}
	DB.Save(&user)
	type SimpleUser struct {
		Name      string
		ID        int64
		UpdatedAt time.Time
		CreatedAt time.Time
	}

	var simpleUser SimpleUser
	if err := DB.Table("users").Where("name = ?", user.Name).First(&simpleUser).Error; err != nil {
		t.Fatalf("Failed to query smaller user, got error %v", err)
	}

	AssertObjEqual(t, user, simpleUser, "Name", "ID", "UpdatedAt", "CreatedAt")
}

func TestPluck(t *testing.T) {
	users := []*User{
		GetUser("pluck-user1", Config{}),
		GetUser("pluck-user2", Config{}),
		GetUser("pluck-user3", Config{}),
	}

	DB.Create(&users)

	var names []string
	if err := DB.Model(User{}).Where("name like ?", "pluck-user%").Order("name").Pluck("name", &names).Error; err != nil {
		t.Errorf("got error when pluck name: %v", err)
	}

	var ids []int
	if err := DB.Model(User{}).Where("name like ?", "pluck-user%").Order("name").Pluck("id", &ids).Error; err != nil {
		t.Errorf("got error when pluck id: %v", err)
	}

	for idx, name := range names {
		if name != users[idx].Name {
			t.Errorf("Unexpected result on pluck name, got %+v", names)
		}
	}

	for idx, id := range ids {
		if int(id) != int(users[idx].ID) {
			t.Errorf("Unexpected result on pluck id, got %+v", ids)
		}
	}
}

func TestPluckWithSelect(t *testing.T) {
	users := []User{
		{Name: "pluck_with_select_1", Age: 25},
		{Name: "pluck_with_select_2", Age: 26},
	}

	DB.Create(&users)

	var userAges []int
	err := DB.Model(&User{}).Where("name like ?", "pluck_with_select%").Select("age + 1  as user_age").Pluck("user_age", &userAges).Error
	if err != nil {
		t.Fatalf("got error when pluck user_age: %v", err)
	}

	sort.Ints(userAges)

	AssertEqual(t, userAges, []int{26, 27})
}