package main

import (
	"log"
	"time"

	"golang.org/x/crypto/bcrypt"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

type UserDB struct {
	DB *gorm.DB
}

type Model struct {
	Id        uint64 `gorm:"primaryKey"`
	CreatedAt time.Time
	UpdatedAt time.Time
}

func (u *UserDB) Open(filename string) error {
	var err error
	u.DB, err = gorm.Open(sqlite.Open(filename), &gorm.Config{})
	if err != nil {
		return err
	}
	err = u.DB.AutoMigrate(&User{}, &Faction{})
	return err
}

type User struct {
	Model
	Name                string   `gorm:"uniqueIndex,collate:no_case"`
	Password            string   // bcrypt
	Faction             *Faction `gorm:"-"` // Hot loaded in memory
	FactionId           uint64
	FactionSO           bool // Faction.Senior_Officer
	FactionO            bool // Faction.Officer
	X                   uint64
	Y                   uint64
	World               uint32
	Health              uint32
	MaxHealth           uint32
	Magic               uint32
	MaxMagic            uint32
	Class               uint8 // 1=Knight (Cyan), 2=Thief (Brown), 3=Cleric (Green), 4=Wizard (Magenta), 5=Ranger (Red)
	Level               uint32
	Xp                  uint64
	Weapon              uint8
	WeaponEnchant       uint8
	Armor               uint8
	ArmorEnchant        uint8
	RangedWeapon        uint8
	RangedWeaponEnchant uint8
	Shield              uint8
	Ring                uint8
	Amulet              uint8
	Gold                uint64
	GoldBanked          uint64
	GemRed              uint32
	GemGreen            uint32
	GemBlue             uint32
}

func (u *UserDB) FindUserByName(name string) *User {
	var usr *User
	result := u.DB.First(&usr, &User{Name: name})
	if result.Error != nil {
		log.Printf("UserDB.FindUser(name='%s') > %v", name, result.Error)
		return nil
	}
	// Hot load the users faction if they are in one
	if usr != nil && usr.FactionId != 0 {
		fac := u.FindFactionById(usr.FactionId)
		if fac != nil {
			usr.Faction = fac
		}
	}
	return usr
}

func (u *User) SetPassword(password string) error {
	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
	if err != nil {
		return err
	}
	u.Password = string(hash)
	return nil
}

func (u *User) VerifyPassword(password string) error {
	return bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
}

func (u *User) PasswordCost() int {
	cost, err := bcrypt.Cost([]byte(u.Password))
	if err != nil {
		log.Printf("User.PasswordCost() > %v", err)
		return -1
	}
	return cost
}

func (u *UserDB) SaveUser(usr *User) error {
	result := u.DB.Save(usr)
	return result.Error
}

type Faction struct {
	Model
	Name        string `gorm:"unique,collate:nocase"`
	Description string
	LeaderId    uint64 `gorm:"unique"`
	Gold        uint64
	GemRed      uint32
	GemGreen    uint32
	GemBlue     uint32
}

func (u *UserDB) FindFactionByName(name string) *Faction {
	var fac *Faction
	result := u.DB.First(&fac, &Faction{Name: name})
	if result.Error != nil {
		log.Printf("UserDB.FindFactionByName(name='%s') > %v", name, result.Error)
		return nil
	}
	return fac
}

func (u *UserDB) FindFactionById(id uint64) *Faction {
	var fac *Faction
	result := u.DB.First(&fac, id)
	if result.Error != nil {
		log.Printf("UserDB.FindFactionById(id=%d) > %v", id, result.Error)
		return nil
	}
	return fac
}

func (u *UserDB) SaveFaction(fac *Faction) error {
	result := u.DB.Save(fac)
	return result.Error
}