package server

import (
	"code.severnaya.net/kordophone-mock/v2/data"
	"code.severnaya.net/kordophone-mock/v2/model"
)

const VERSION = "Kordophone-2.0"

const (
	AUTH_USERNAME = "test"
	AUTH_PASSWORD = "test"
)

type Server struct {
	version       string
	conversations []model.Conversation
	authTokens    []model.AuthToken
}

type AuthError struct {
	message string
}

func (e *AuthError) Error() string {
	return e.message
}

func NewServer() *Server {
	return &Server{
		version:       VERSION,
		conversations: []model.Conversation{},
	}
}

func (s *Server) Version() string {
	return s.version
}

func (s *Server) Conversations() []model.Conversation {
	return s.conversations
}

func (s *Server) AddConversation(c model.Conversation) {
	s.conversations = append(s.conversations, c)
}

func (s *Server) PopulateWithTestData() {
	numConversations := 100
	cs := make([]model.Conversation, numConversations)
	for i := 0; i < numConversations; i++ {
		cs[i] = data.GenerateRandomConversation()
	}

	s.conversations = cs
}

func (s *Server) Authenticate(username string, password string) (*model.AuthToken, error) {
	if username != AUTH_USERNAME || password != AUTH_PASSWORD {
		return nil, &AuthError{"Invalid username or password"}
	}

	token, err := model.NewAuthToken(username)
	if err != nil {
		return nil, err
	}

	// Register for future auth
	s.registerAuthToken(token)

	return token, nil
}

func (s *Server) CheckBearerToken(token string) bool {
	return s.authenticateToken(token)
}

// Private

func (s *Server) registerAuthToken(token *model.AuthToken) {
	s.authTokens = append(s.authTokens, *token)
}

func (s *Server) authenticateToken(token string) bool {
	for _, t := range s.authTokens {
		if t.SignedToken == token {
			return true
		}
	}

	return false
}