// Copyright (C) 2017 Marius Schellenberger

package db

import (
	"fmt"
	"git.giftfish.de/ston1th/gowiki/pkg/cache"
	"git.giftfish.de/ston1th/gowiki/pkg/core"
	"git.giftfish.de/ston1th/gowiki/pkg/index"
	"git.giftfish.de/ston1th/gowiki/pkg/store"
	"git.giftfish.de/ston1th/gowiki/pkg/util"
)

const (
	defUser     = "admin"
	defPassword = "gowiki"
	usersFile   = "users.db"
	pagesFile   = "pages.db"
	bcryptCost  = 13
	indexName   = "Index"
	welcome     = `# Welcome to GoWiki
This is the [Index](/wiki/Index) page.  
You can customize it how you like.`
	wikiSection = "wiki"
)

/*const (
	maxResult       = 1e6
	maxSearchResult = 101
)*/

func dbErr(i interface{}) error {
	return fmt.Errorf("db: %s", i)
}

type DB struct {
	pages store.Store
	users store.Store
	cache *cache.Cache
	Index *index.Index
}

func NewDB(indexPath string) (db *DB, err error) {
	db = &DB{cache: cache.NewCache()}
	db.Index, err = index.NewIndex(indexPath)
	if err != nil {
		return
	}

	db.users, err = store.NewBoltStore(usersFile, nil)
	if err != nil {
		return
	}
	if db.UserExists(defUser) != nil {
		err = db.CreateUser(defUser, defPassword, true)
		if err != nil {
			return
		}
	}
	err = db.UnlockUser(defUser)
	if err != nil {
		return
	}

	db.pages, err = store.NewBoltStore(pagesFile, nil)
	if err != nil {
		return
	}
	if _, err = db.pageExists(util.StoreTitle(wikiSection, indexName), defUser); err != nil {
		_, err = db.CreatePage(indexName, wikiSection, welcome, defUser, core.Public)
		if err != nil {
			return
		}
	}
	return
}

func (db *DB) Close() error {
	err := db.pages.Close()
	if err != nil {
		return err
	}
	err = db.users.Close()
	if err != nil {
		return err
	}
	return db.Index.Close()
}