package store

import (
	"fmt"

	"git.t-juice.club/microfilm/users"
)

var (
	ErrNoSuchUser = fmt.Errorf("no such user")
	ErrUserExists = fmt.Errorf("user alread exists")
)

type MemoryStore struct {
	Users map[string]users.User
}

func NewMemoryStore() *MemoryStore {
	return &MemoryStore{
		Users: make(map[string]users.User),
	}
}

func (s *MemoryStore) AddUser(u users.User) error {
	if _, ok := s.Users[u.ID]; ok {
		return ErrUserExists
	}

	s.Users[u.ID] = u

	return nil
}

func (s *MemoryStore) DeleteUser(id string) error {
	if _, ok := s.Users[id]; !ok {
		return ErrNoSuchUser
	}

	delete(s.Users, id)

	return nil
}

func (s *MemoryStore) UpdateUser(u users.User) error {
	if _, ok := s.Users[u.ID]; !ok {
		return ErrNoSuchUser
	}

	s.Users[u.ID] = u

	return nil
}

func (s *MemoryStore) GetUser(identifier string) (users.User, error) {
	u, ok := s.Users[identifier]
	if !ok {
		// Check if identifier is username
		for _, u := range s.Users {
			if u.Username == identifier {
				return u, nil
			}
		}

		return u, ErrNoSuchUser
	}

	return u, nil
}