app.LoadPlugin( "Biometric" )
var mpw  // plaintext master password
var empw // encrypted master password
function OnStart() {
    salt = app.GetDeviceId()
    crpt = app.CreateCrypt() 
    bio = app.CreateBiometric()
	lay = app.CreateLayout( "Linear", "Top,Left" )
	txt = app.AddText(lay,"Password Vault")
	txt.SetTextSize(18)
	app.AddLayout( lay )
    if(!bio.IsHardwareDetected())
        getMasterPassword()
    else if(!bio.HasEnrolledFingerprints()) {
        app.ShowPopup("We would recommend setting up fingerprint security")
        getMasterPassword()
    } else {
        adlg = bio.CreateAuthDialog("Please scan your fingerprint", "Vault")
        adlg.SetOnSuccess(getMasterPassword)
        adlg.SetOnClose(function () {app.Quit("Exiting");})
        adlg.Show()
    } // if
} // fn
function getMasterPassword () {
//app.ClearData() // testing
    empw = app.LoadText("empw","")
    empw = empw.trim() // seems necessary
    if (empw == "") {option = "";} else {option = ",password";}
    te = app.AddTextEdit(lay,"",null,null,"singleline,nospell"+option)
    te.SetHint("Enter Master Password")
    te.Focus()
    if (empw == "") {te.SetOnEnter(newMasterPassword);} else {te.SetOnEnter(checkMasterPassword);}
    app.ShowKeyboard(te)
} // fn
function newMasterPassword() {
    mpw = this.GetText()
    if (mpw.length < 4) 
        app.ShowPopup("Minimum length for Master Password is 4 characters")
    else 
        {this.Hide() ; empw = crpt.Encrypt(mpw,mpw+salt) ; app.SaveText("empw",empw); opendb();} 
} // fn
function checkMasterPassword() {
    gt = this.GetText()
    egt = crpt.Encrypt(gt,gt+salt) // encrypt user input
    egt = egt.trim() // seems necessary
    if (egt != empw)
        app.ShowPopup("Master Password doesn't match!")
    else
        {this.Hide(); mpw = gt ; opendb()}
} // fn
function opendb () {
    add = app.AddButton(lay,"[fa-plus-square-o] Add",null,null,"fontawesome")
    add.SetOnTouch(insert)
    lst = app.AddList(lay,"",0.8)
    lst.SetTextSize2(18,"px")
    lst.SetOnTouch(show)

//    db = app.OpenDatabase( "Vault" ) // does not work as APK  
    db = app.OpenDatabase(app.GetPrivateFolder("Downloads")+"/Vault" )  
       db.ExecuteSql("CREATE TABLE IF NOT EXISTS passwords (site text primary key, epw text)")  
//db.ExecuteSql("DELETE FROM passwords",[],null,delError) // testing
//epw = crpt.Encrypt("home",mpw+salt) // testing
//db.ExecuteSql("INSERT INTO passwords (site, epw) VALUES (?,?)", ["home", epw], null, insError ) // testing 
    db.ExecuteSql( "select * from passwords order by site;", [], display ) 
        app.EnableBackKey(false) // close database if app closed
} // fn
function display(results) {
    var str = "";  
    for (var i = 0; i < results.rows.length; i++ ) {
        var item = results.rows.item(i)
        site = item.site
        epw = item.epw
        pw = crpt.Decrypt(epw,mpw+salt)
        if (str != "") str+=","
        str += site+":"+pw+":"   
    } // for  
    lst.SetList(str)
} // fn
function insert() {
    if (typeof dlgi == "undefined") {
        dlgi = app.CreateDialog("Add","old")
        layDlgi = app.CreateLayout("linear","left,vertical")
        layDlgi.SetSize(0.5,-1)
        dlgi.AddLayout(layDlgi)
        sa = app.AddTextEdit(layDlgi,"",null,null,"singleline,nospell")
        sa.SetHint("site or app")
        pwi = app.AddTextEdit(layDlgi,"",null,null,"singleline,nospell")
        pwi.SetHint("password")
        ent = app.AddButton(layDlgi,"[fa-save] Save",null,null,"fontawesome")
        ent.SetOnTouch(function () {
           i1 = sa.GetText() ; i2 = pwi.GetText() ; i2e = crpt.Encrypt(i2,mpw+salt)
            db.ExecuteSql("INSERT INTO passwords (site, epw) VALUES (?,?)", [i1,i2e], insSuccess, insError )  
        })
    } else {
        sa.SetText("")
        pwi.SetText("")
    }
    dlgi.Show()
    app.ShowKeyboard(sa)
}
function show(title,body,icon,index) {
    gtitle = title
    if (typeof dlg == "undefined") { 
        dlg = app.CreateDialog(title,"old")
        layDlg = app.CreateLayout("linear","left,vertical")
        layDlg.SetSize(0.5,-1)
        dlg.AddLayout(layDlg)
        row2 = app.AddLayout(layDlg,"linear","horizontal")
        cp2 = app.AddButton(row2,"[fa-copy] Copy",null,null,"fontawesome")
        cp2.SetOnTouch(function() {app.SetClipboardText(bdy.GetText());cp2.Focus();})
        bdy = app.AddTextEdit(row2,body,null,null,"singleline,nospell")
        sve = app.AddButton(layDlg,"[fa-save] Save",null,null,"fontawesome")
        sve.SetOnTouch(function() {
            pw = bdy.GetText() ; epw = crpt.Encrypt(pw,mpw+salt); lst.SetItem(gtitle,gtitle,pw)
            db.ExecuteSql("UPDATE passwords SET epw = ? where site=? ;",[epw,gtitle],updSuccess,updError)
            dlg.Hide()
            })
        del = app.AddButton(layDlg,"[fa-minus-square-o] Delete",null,null,"fontawesome")
        del.SetOnTouch(function() {
            lst.RemoveItem(gtitle)
            db.ExecuteSql("DELETE FROM passwords where site=?;",[gtitle],delSuccess,delError)
            dlg.Hide()
            })
    } else {
        dlg.SetTitle(title)
        bdy.SetText(body)
    }
    dlg.Show()
}
function insSuccess(msg) {  
    lst.AddItem(i1,i2)
    dlgi.Hide()
}  
function insError(msg) {
    alert(msg)
    app.ShowPopup("insert failed, site/app must be unique")
}
function updSuccess(msg) {
//    alert(msg.rowsAffected)
    app.ShowPopup("updated")
}
function updError(msg) {
    alert(msg)
    app.ShowPopup("update failed")
}
function delSuccess(msg) {
//    alert(msg.rowsAffected)
    app.ShowPopup("deleted")
}
function delError(msg) {
    alert(msg)
    app.ShowPopup("delete failed")
}
function OnBack() {
    db.Close()
    app.Exit()
}