package main

import (
	"path"
	"time"
)

var Firefox = BrowserPaths{
	"places.sqlite",
	"/home/spike/.mozilla/firefox/p1rrgord.default/",
}

const (
	MozPlacesRootID       = 1
	MozPlacesTagsRootID   = 4
	MozPlacesMobileRootID = 6
)

type FFBrowser struct {
	BaseBrowser //embedding
	_places     *DB
}

type FFTag struct {
	id    int
	title string
}

func NewFFBrowser() IBrowser {
	browser := &FFBrowser{}
	browser.name = "firefox"
	browser.bType = TFirefox
	browser.baseDir = Firefox.BookmarkDir
	browser.bkFile = Firefox.BookmarkFile
	browser.Stats = &ParserStats{}
	browser.NodeTree = &Node{Name: "root", Parent: nil, Type: "root"}

	// Across jobs buffer
	browser.InitBuffer()

	browser.SetupWatcher()

	/*
	 *Run debouncer to avoid duplicate running of jobs
	 *when a batch of events is received
	 */

	//browser.eventsChan = make(chan fsnotify.Event, EventsChanLen)
	//go debouncer(3000*time.Millisecond, browser.eventsChan, browser)

	return browser
}

func (bw *FFBrowser) Watch() bool {

	log.Debugf("<%s> NOT IMPLEMENTED! ", bw.name)
	//if !bw.isWatching {
	//go WatcherThread(bw)
	//bw.isWatching = true
	//return true
	//}

	//return false
	return false
}

func (bw *FFBrowser) Load() {
	bw.BaseBrowser.Load()
	bw.Run()
}

func getFFBookmarks(bw *FFBrowser) {

	QGetBookmarks := `WITH bookmarks AS

	(SELECT moz_places.url AS url,
			moz_places.description as desc,
			moz_places.title as urlTitle,
			moz_bookmarks.parent AS tagId
		FROM moz_places LEFT OUTER JOIN moz_bookmarks
		ON moz_places.id = moz_bookmarks.fk
		WHERE moz_bookmarks.parent
		IN (SELECT id FROM moz_bookmarks WHERE parent = ? ))

	SELECT url, IFNULL(urlTitle, ''), IFNULL(desc,''),
			tagId, moz_bookmarks.title AS tagTitle

	FROM bookmarks LEFT OUTER JOIN moz_bookmarks
	ON tagId = moz_bookmarks.id
	ORDER BY url`

	//QGetTags := "SELECT id,title from moz_bookmarks WHERE parent = %d"

	rows, err := bw._places.Handle.Query(QGetBookmarks, MozPlacesTagsRootID)
	logPanic(err)

	tagMap := make(map[int]*Node)
	urlMap := make(map[string]*Node)

	// Rebuild node tree
	rootNode := bw.NodeTree

	/*
	 *This pass is used only for fetching bookmarks from firefox.
	 *Checking against the URLIndex should not be done here
	 */
	for rows.Next() {
		var url, title, tagTitle, desc string
		var tagId int
		err = rows.Scan(&url, &title, &desc, &tagId, &tagTitle)
		//log.Debugf("%s|%s|%s|%d|%s", url, title, desc, tagId, tagTitle)
		logPanic(err)

		/*
		 * If this is the first time we see this tag
		 * add it to the tagMap and create its node
		 */
		tagNode, tagNodeExists := tagMap[tagId]
		if !tagNodeExists {
			// Add the tag as a node
			tagNode = new(Node)
			tagNode.Type = "tag"
			tagNode.Name = tagTitle
			tagNode.Parent = rootNode
			rootNode.Children = append(rootNode.Children, tagNode)
			tagMap[tagId] = tagNode
			bw.Stats.currentNodeCount++
		}

		// Add the url to the tag
		urlNode, urlNodeExists := urlMap[url]
		if !urlNodeExists {
			urlNode = new(Node)
			urlNode.Type = "url"
			urlNode.URL = url
			urlNode.Name = title
			urlNode.Desc = desc
			urlMap[url] = urlNode
		}

		// Add tag to urlnode tags
		urlNode.Tags = append(urlNode.Tags, tagNode.Name)
		log.Debug(urlNode.Tags)

		// Set tag as parent to urlnode
		urlNode.Parent = tagMap[tagId]

		// Add urlnode as child to tag node
		tagMap[tagId].Children = append(tagMap[tagId].Children, urlNode)

		bw.Stats.currentUrlCount++
		bw.Stats.currentNodeCount++
	}

	/*
	 *Build tags for each url then check against URLIndex
	 *for changes
	 */

	// Check if url already in index TODO: should be done in new pass
	//iVal, found := bw.URLIndex.Get(urlNode.URL)

	/*
	 * The fields where tags may change are hashed together
	 * to detect changes in futre parses
	 * To handle tag changes we need to get all parent nodes
	 *  (tags) for this url then hash their concatenation
	 */

	//nameHash := xxhash.ChecksumString64(urlNode.Name)
	// TODO: No guarantee we finished gathering tags !!

}

func (bw *FFBrowser) Run() {

	log.Debugf("<%s> start bookmark parsing", bw.name)

	// TODO: Node tree is not used for now as the folder
	// parsing is not implemented
	// Rebuild node tree
	// bw.NodeTree = &Node{Name: "root", Parent: nil}

	// Open firefox sqlite db
	bookmarkPath := path.Join(bw.baseDir, bw.bkFile)
	placesDB := DB{}.New("Places", bookmarkPath)
	placesDB.InitRO()
	defer placesDB.Close()

	bw._places = placesDB

	// Parse bookmarks to a flat tree (for compatibility with tree system)
	start := time.Now()
	getFFBookmarks(bw)
	bw.Stats.lastParseTime = time.Since(start)

	// Finished parsing
	//go PrintTree(bw.NodeTree) // debugging
	log.Debugf("<%s> parsed %d bookmarks and %d nodes", bw.name, bw.Stats.currentUrlCount, bw.Stats.currentNodeCount)
	log.Debugf("<%s> parsed tree in %s", bw.name, bw.Stats.lastParseTime)

	bw.ResetStats()

	syncTreeToBuffer(bw.NodeTree, bw.BufferDB)

	// Implement incremental sync by doing INSERTs
	bw.BufferDB.CopyTo(CacheDB)
}