// grab all selected thumbnails and return a <div> containing the thumbnails
// with extra yr and date attached as attributes so we can set the default
// dir name for a move directory - not used in del, but no harm to include them
function GetSelnAsDiv()
{
    seln=''
    $('.highlight').each(function( index ) { 
        seln+='<div fname="' + $(this).attr('fname') + '" yr="' + $(this).attr('yr') +
            '" date="' + $(this).attr('date') +
            '" class="px-1 col col-auto">' + $(this).children().parent().html() + '</div>'
        seln+='<input type="hidden" name="eid-'+index+'" value="'+$(this).attr('id')+'">'
        } )
    return '<div class="row col-12">'+seln+'</div>'
}

// return a list of eid=<id> for each selected thumbnail
function GetSelnAsData()
{
    to_del=''
    $('.highlight').each(function( index ) { to_del+='&eid-'+index+'='+$(this).attr('id') } )
    return to_del
}

// use an ajax POST to force an AI scan on the selected image(s)
function RunAIOnSeln(person)
{
    post_data = GetSelnAsData()
    post_data += '&person='+person.replace('ai-','')
    $.ajax({ type: 'POST', data: post_data, url: '/run_ai_on', success: function(data){ CheckForJobs() } })
}

// code to change the associated image/icon when the move to selection box (import or storage paths) is changed
function change_rp_sel()
{
    icon_url = $('option:selected', '#rp_sel').attr('icon_url')
    $('#move_path_icon').html( '<svg id="move_path_icon" width="20" height="20" fill="currentColor"><use xlink:href="'
        + icon_url + '"></svg>' )
    seld_ptype=$('option:selected', '#rp_sel').attr('path_type')
    $('#move_path_type').val( seld_ptype )
    // clear all 'existing' buttons
    $('.move_Import').addClass('d-none')
    $('.move_Storage').addClass('d-none')
    // show just selected path's (relevant) buttons
    $('.move_'+seld_ptype).removeClass('d-none')
}

// POST to see if there are any other existing directories named around this date
// (if so display them as options for a move)
function GetExistingDirsAsDiv( dt, divname, ptype )
{
    $.ajax({
        type: 'POST', data: null, url: '/get_existing_paths/'+dt,
        success: function(data) {
            $('#'+divname).html(data)
            dirs = JSON.parse(data)
            s=''
            dirs.forEach( function(item, index) {
                if( item.ptype != ptype )
                    vis = 'd-none '
                else
                    vis = ''
                s+= '<button class="btn btn-outline-primary move_'+item.ptype+ ' ' + vis + '" '
                    s+= 'onClick="$(\'#prefix\').val(\''+item.prefix.replace("\'","\\\'")+'\'); '
                        s+='$(\'#suffix\').val(\''+item.suffix.replace("\'","\\\'")+'\');return false;">'
                    s+=item.prefix+item.suffix
                    s+='</button>'
            } )
            if( s == '' )
                $('#existing').html('')
            else
                $('#move_'+ptype).removeClass('invisible')
            $('#'+divname).html(s)
        }
    } )
}

// wrapper to do some clean up before POST to /move_files or /delete_files
// used to remove the highlighted item(s) && reset the numbering so highlighting continues to work
function MoveOrDelCleanUpUI()
{
    // remove the images being moved (so UI immediately 'sees' the move)
    $("[name^=eid-]").each( function() { $('#'+$(this).attr('value')).remove() } )
    // reorder the images via ecnt again, so future highlighting can work
    document.mf_id=0; $('.figure').each( function() { $(this).attr('ecnt', document.mf_id ); document.mf_id++ } )
    $('#dbox').modal('hide')
}


// show the DBox for a move file, includes all thumbnails of selected files to move
// and a pre-populated folder to move them into, with text field to add a suffix
function MoveDBox(path_details, db_url)
{
    $('#dbox-title').html('Move Selected File(s) to new directory in Storage Path')  
    div =`
        <div class="form-row col-12">
        <p class="col">Moving the following files?</p>
        </div>
        <form id="mv_fm" class="form form-control-inline col-12">
        <input id="move_path_type" name="move_path_type" type="hidden"
        `
    div += ' value="' + path_details[0].type + '"></input>'
    div+=GetSelnAsDiv()
    yr=$('.highlight').first().attr('yr')
    dt=$('.highlight').first().attr('date')
    div+='<div class="row">Use Existing Directory (in the chosen path):</div><div id="existing"></div>'
    GetExistingDirsAsDiv( dt, "existing", path_details[0].type )
    div+=`
        <div class="input-group my-3">
        <alert class="alert alert-primary my-auto py-1">
        `
    // NB: alert-primary here is a hack to get the bg the same color as the alert primary by
    div+= '<svg id="move_path_icon" width="20" height="20" fill="currentColor"><use xlink:href="' + path_details[0].icon_url + '"></svg>'
    div+= '<select id="rp_sel" name="rel_path" class="text-primary alert-primary py-1 border border-primary rounded" onChange="change_rp_sel()">'
    for(p of path_details) {
        div+= '<option path_type="'+p.type+'" icon_url="'+p.icon_url+'">'+p.path+'</option>'
    }
    div+= '</select>'
    div+=`
        </alert>
        <input id="prefix" type="text" name="prefix" class="text-primary text-right form-control"
        `
    div+="value="+yr+'/'+dt+"-"
    div+=`
        "></input>
        <input id="suffix" type="text" name="suffix" class="form-control" placeholder="name"> </input>
        </div>
        <div class="form-row col-12 mt-2">
            <button onClick="$('#dbox').modal('hide'); return false;" class="btn btn-outline-secondary offset-1 col-2">Cancel</button>
            <button id="move_submit" onClick="MoveOrDelCleanUpUI(); $.ajax({ type: 'POST', data: $('#mv_fm').serialize(), url: '/move_files', success: function(data) { 
                if( $(location).attr('pathname').match('search') !== null ) { window.location='/' }; CheckForJobs() } }); return false" class="btn btn-outline-primary col-2">Ok</button>
        </div>
        </form>
    `

    $('#dbox-content').html(div)
    $('#dbox').modal('show')
    $("#prefix").keypress(function (e) { if (e.which == 13) { $("#move_submit").click(); return false; } } )
    $("#suffix").keypress(function (e) { if (e.which == 13) { $("#move_submit").click(); return false; } } )
}

// show the DBox for a delete/restore file, includes all thumbnails of selected files 
// with appropriate coloured button to Delete or Restore files`
function DelDBox(del_or_undel)
{
    to_del = GetSelnAsData()
    $('#dbox-title').html(del_or_undel+' Selected File(s)')
    div ='<div class="row col-12"><p class="col">' + del_or_undel + ' the following files?</p></div>'
    div+=GetSelnAsDiv()
    div+=`<div class="row col-12 mt-3">
            <button onClick="$('#dbox').modal('hide')" class="btn btn-outline-secondary col-2">Cancel</button>
    `
    div+=`
    <button onClick="MoveOrDelCleanUpUI(); $.ajax({ type: 'POST', data: to_del, url:
    `
    if( del_or_undel == "Delete" )
        div+=`
        '/delete_files',
        success: function(data){ 
            if( $(location).attr('pathname').match('search') !== null ) { window.location='/' }; CheckForJobs() } }); return false" class="btn btn-outline-danger col-2">Ok</button>
        </div>
        `
    else
        // just force page reload to / for now if restoring files from a search path -- a search (by name) 
        // would match the deleted/restored file, so it would be complex to clean up the UI (and can't reload, as DB won't be changed yet)
        div+=`
        '/restore_files',
        success: function(data){ 
            if( $(location).attr('pathname').match('search') !== null ) { window.location='/' }; CheckForJobs() } }); return false" class="btn btn-outline-success col-2">Ok</button>
        </div>
        `
    $('#dbox-content').html(div)
    $('#dbox').modal('show')
}

// show the DBox for a lame quick version of file details 
function DetailsDBox()
{
    $('#dbox-title').html('Details of Selected File(s)')  
    var div ='<div class="row col-12">'
    $('.highlight').each(function( index ) { 
            div += "<div class='col-3' style='background-color:lightgray'>Name:</div><div class='col-9' style='background-color:lightgray'>" + $(this).attr('fname') + "</div>"
            div += "<div class='col-3'>Date:</div><div class='col-9'>" + $(this).attr('pretty_date') + "</div>"
            dir = $(this).attr('in_dir')
            if( dir.slice(-1) != "/" )
                dir=dir.concat('/')
            div += "<div class='col-3'>Dir:</div><div class='col-9'>" + dir + "</div>"
            div += "<div class='col-3'>Size:</div><div class='col-9'>" + $(this).attr('size') + " MB</div>"
            div += "<div class='col-3'>Hash:</div><div class='col-9'>" + $(this).attr('hash') + "</div>"
            div += "<div class='col-3'>Path Type:</div><div class='col-9'>" + $(this).attr('path_type') + "</div>"
        } )
        div += `
            </div>
            <br>
            <div class="form-row col-12">
                <button onClick="$('#dbox').modal('hide'); return false;" class="btn btn-outline-secondary offset-1 col-2">Cancel</button>
            </div>
        `
    $('#dbox-content').html(div)
    $('#dbox').modal('show')
}


// function to change the size of thumbnails (and resets button bar to newly
// selected size)
function ChangeSize(clicked_button,sz)
{
	$('.sz-but.btn-info').removeClass('btn-info text-white').addClass('btn-outline-info')
	$(clicked_button).addClass('btn-info text-white').removeClass('btn-outline-info')
	$('.thumb').attr( {height: sz, style: 'font-size:'+sz+'px' } )
	$('#size').val(sz)
    sz=sz-22
    $('.svg').height(sz);
    $('.svg').width(sz);
    $('.svg_cap').width(sz);
}

// DoSel is called when a click event occurs, and sets the selection via adding
// 'highlight' to the class of the appropriate thumbnails
// e == event (can see if shift/ctrl held down while left-clicking
// el == element the click is on
// this allows single-click to select, ctrl-click to (de)select 1 item, and
// shift-click to add all elements between highlighted area and clicked area,
// whether you click after highlight or before
function DoSel(e, el)
{
    if( e.ctrlKey )
    {
        $(el).toggleClass('highlight')
        return
    }
    if( e.shiftKey )
    {
        st=Number($('.highlight').first().attr('ecnt'))
        end=Number($('.highlight').last().attr('ecnt'))
        clicked=Number($(el).attr('ecnt'))
        // if we shift-click first element, then st/end are NaN, so just highlightthe one clicked
        if( isNaN(st) )
        {
            $('.entry').slice( clicked, clicked+1 ).addClass('highlight')
            return
        }
        if( clicked > end )
            $('.entry').slice( end, clicked+1 ).addClass('highlight')
        else
            $('.entry').slice( clicked, st ).addClass('highlight')
        return
    }
    $('.highlight').removeClass('highlight')
    $(el).addClass('highlight')
}

// if a selection exists, enable move & del/restore buttons otherwise disable them
function SetButtonState() {
    var sel=false
    $('.highlight').each(function( index ) { sel=true } )
    if( sel ) {
        $('#move').attr('disabled', false )
        $('#del').attr('disabled', false )
    } else {
        $('#move').attr('disabled', true )
        $('#del').attr('disabled', true )
    }
}

// Check if the set of highlights are either only figures, dirs or both
// used to work out what options are shown in the file context menu
function FiguresOrDirsOrBoth() {
    var figure=false
    var dir=false
    $('.highlight').each(function( index ) { 
        if( $(this).hasClass('figure') ) {
            figure=true
        } 
        if( $(this).hasClass('dir') ) {
            dir=true
        } 
    } )
    if( figure & ! dir )
        return "figure"
    if( ! figure & dir )
        return "dir"
    return "both"
}

// Check if the set of highlights contain Bin and Not Bin...
// if its both, then no del/restore is possible in context menu
// otherwise can either set del or restore appropriately
function SelContainsBinAndNotBin() {
    var bin=false
    var not_bin=false
    $('.highlight').each(function( index ) { 
        if( $(this).attr('path_type') == "Bin" ) {
            bin=true
        } else {
            not_bin=true
        }
    } )
    if( bin && not_bin )
        return true
    else
        return false
}

// checks to see if there is no selection active
function NoSel() {
    var sel=false
    $('.highlight').each(function( index ) { sel=true } )
    // func looks for No Selection, so if sel is true and we have a sel, return false (i.e. NOT No Sel -> Sel )
    if( sel )
        return false
    else
        return true
}