package orm

import (
	"net/http"

	"git.andreafazzi.eu/andrea/oef/renderer"
	"github.com/jinzhu/gorm"

	"github.com/sethvargo/go-password/password"
)

type User struct {
	gorm.Model

	Username string
	Password string `csv:"-"`
	Role     string
}

var (
	SubscriberUser    = User{Username: "subscriber", Role: "subscriber"}
	AdministratorUser = User{Username: "admin", Role: "administrator"}
)

func (model *User) GetID() uint { return model.ID }

func (model *User) String() string {
	return model.Username
}

func genPassword() (string, error) {
	password, err := password.Generate(8, 2, 0, false, true)
	if err != nil {
		return "", err
	}
	return password, nil
}

func (model *User) BeforeSave(tx *gorm.DB) error {
	if model.Password == "" {
		password, err := genPassword()
		if err != nil {
			return err
		}
		model.Password = password
	}
	return nil
}

func (model *User) Create(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
	if r.Method == "GET" {
		user := new(User)
		return user, nil
	} else {
		user := new(User)
		err := renderer.Decode(user, r)
		if err != nil {
			return nil, err
		}
		user, err = CreateUser(db, user)
		if err != nil {
			return nil, err
		}
		return user, nil
	}
}

func (model *User) Read(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
	var user User

	id := args["id"]

	if err := db._db. /*.Preload("Something")*/ First(&user, id).Error; err != nil {
		return nil, err
	}

	return &user, nil
}

func (model *User) ReadAll(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
	var users []*User
	if err := db._db. /*.Preload("Something")*/ Order("created_at").Find(&users).Error; err != nil {
		return nil, err
	}
	return users, nil
}

func (model *User) Update(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
	if r.Method == "GET" {
		result, err := model.Read(db, args, w, r)
		if err != nil {
			return nil, err
		}

		user := result.(*User)

		// if err := db._db.Find(&user.AllElements).Error; err != nil {
		// 	return nil, err
		// }

		// user.SelectedElement = make(map[uint]string)
		// user.SelectedElement[user.ElementID] = "selected"

		return user, nil
	} else {
		user, err := model.Read(db, args, w, r)
		if err != nil {
			return nil, err
		}
		err = renderer.Decode(user, r)
		if err != nil {
			return nil, err
		}
		_, err = SaveUser(db, user)
		if err != nil {
			return nil, err
		}
		user, err = model.Read(db, args, w, r)
		if err != nil {
			return nil, err
		}
		return user.(*User), nil
	}
}

func (model *User) Delete(db *Database, args map[string]string, w http.ResponseWriter, r *http.Request) (interface{}, error) {
	user, err := model.Read(db, args, w, r)
	if err != nil {
		return nil, err
	}
	if err := db._db.Unscoped().Delete(user.(*User)).Error; err != nil {
		return nil, err
	}
	return user.(*User), nil
}

func CreateUser(db *Database, user *User) (*User, error) {
	if err := db._db.Create(user).Error; err != nil {
		return nil, err
	}
	return user, nil
}

func SaveUser(db *Database, user interface{}) (interface{}, error) {
	if err := db._db. /*.Omit("Something")*/ Save(user).Error; err != nil {
		return nil, err
	}
	return user, nil
}