package controllers

import (
	"errors"
	"fmt"
	"log"
	"strings"

	"git.aiterp.net/AiteRP/aitestory/server"
	"git.aiterp.net/gisle/wrouter/auth"
	"github.com/sadbox/mediawiki"
)

// WikiAthenticator talks with the wiki, allowing users
// to log in
type WikiAthenticator struct{}

// ID is for a potential multi-login future
func (wikiAuth *WikiAthenticator) ID() string {
	return "wiki"
}

// Name is for a potential multi-login future
func (wikiAuth *WikiAthenticator) Name() string {
	return "Wiki"
}

// Find finds a user that has logged in at least once
func (wikiAuth *WikiAthenticator) Find(username string) *auth.User {
	db := server.Main.DB

	rows, err := db.Query("SELECT id,role FROM `user` WHERE id=?", username)
	if err != nil {
		log.Println("WikiAthenticator.Find:", err)
		return nil
	}

	defer rows.Close()

	if !rows.Next() {
		return nil
	}

	user := auth.NewUser(wikiAuth, "", "member", make(map[string]string, 4))
	role := "member"
	rows.Scan(&user.ID, &role)
	user.Data["role"] = role

	return user
}

// Login login
func (wikiAuth *WikiAthenticator) Login(username, password string) (*auth.User, error) {
	db := server.Main.DB
	fullID := wikiAuth.ID() + ":" + username

	// Connect to the wiki
	client, err := mediawiki.New(server.Main.Config.Wiki.URL, server.UserAgent)
	if err != nil {
		log.Fatal(err)
	}

	// Log into the wiki with the credementials
	err = client.Login(username, password)
	if err != nil {
		return nil, fmt.Errorf("Login failed %v", err)
	}

	// Look up the user
	rows, err := db.Query("SELECT id,role FROM `user` WHERE id=?", fullID)
	if err != nil {
		return nil, fmt.Errorf("Login failed %v", err)
	}

	// If none was found, just create a new record with the role of member
	if !rows.Next() {
		_, err = db.Exec("INSERT INTO `user` (id, role) VALUES (?, 'member')", fullID)
		if err != nil {
			return nil, fmt.Errorf("Login failed %v", err)
		}

		return auth.NewUser(wikiAuth, fullID, "member", nil), nil
	}

	// If the user was found, read it in
	userid, role := "", ""
	err = rows.Scan(&userid, &role)
	if err != nil {
		return nil, fmt.Errorf("Login failed %v", err)
	}
	userid = strings.Split(userid, "@")[0]

	// Make the user
	return auth.NewUser(wikiAuth, strings.Split(userid, ":")[1], "member", nil), nil
}

// Register just tells the user that they can't.
func (wikiAuth *WikiAthenticator) Register(username, password string, data map[string]string) (*auth.User, error) {
	return nil, errors.New("Registration not allowed")
}