/*
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/


// loadList_flat: Load a chunk of emails as a flat (non-threaded) list
function loadList_flat(mjson, limit, start, deep) {

    // Set displayed posts per page to 10 if social/compact theme, or auto-scale
    if (prefs.theme && (prefs.theme == "social" || prefs.theme == "compact")) {
        d_ppp = 10
        if (prefs.autoScale && prefs.autoScale == 'yes') {
            d_ppp = Math.floor( ( (window.innerHeight - 450) / (prefs.theme == 'social' ? 128 : 48) ) / 5 ) * 5
            if (d_ppp <= 0) {
                d_ppp = 5
            }
        }
    // otherwise default to 15 or auto-scale
    } else {
        d_ppp = 15
        if (prefs.autoScale && prefs.autoScale == 'yes') {
            d_ppp = Math.floor( ( (window.innerHeight - 450) / 28 ) / 5 ) * 5
            if (d_ppp <= 0) {
                d_ppp = 5
            }
        }
    }
    // reset open email counter hash
    open_emails = []

    // set display limit to default ppp if not set by call
    limit = limit ? limit : d_ppp;

    // If no flat JSON is supplied (as with next/prev page clicks), fall back to the previous JSON,
    // otherwise, sort it descending by epoch
    var json = mjson ? ('emails' in mjson && isArray(mjson.emails) ? mjson.emails.sort(function(a, b) {
        return b.epoch - a.epoch
    }) : []) : current_flat_json
    // sync JSON
    current_flat_json = json
    
    // get $now
    var now = new Date().getTime() / 1000

    // start = start or 0 (first email)
    if (!start) {
        start = 0
    }

    // start nesting HTML
    nest = '<ul class="list-group">'

    c_page = start
    // for each email from start to finish (or page limit), do...
    for (var i = start; i < json.length; i++) {
        if (i >= (start + limit)) {
            break
        }
        // Get the email
        var eml = json[i]
        // allow for empty subject
        if (eml.subject.length == 0) {
            eml.subject = '(no subject)'
        }

        // truncate subject (do we need this?)
        if (eml.subject.length > 90) {
            eml.subject = eml.subject.substr(0, 90) + "..."
        }
        eml.mid = eml.id

        // label style and title for timestamp - changes if < 1 day ago
        ld = 'default'
        var ti = ''
        if (eml.epoch > (now - 86400)) {
            ld = 'warning'
            ti = "Has activity in the past 24 hours"
        }
        var d = ''
        // if deep search (multi-list), show the list name label as well
        var qdeep = document.getElementById('checkall') ? document.getElementById('checkall').checked : false
        if (qdeep || deep || global_deep && typeof eml.list != undefined && eml.list != null) {
            // Usual list ID transformation
            var elist = (eml.list ? eml.list : "").replace(/[<>]/g, "").replace(/^([^.]+)\./, "$1@")
            var elist2 = elist
            // shortlist? show dev@ instead of dev@foo.bar then
            if (pm_config.shortLists) {
                elist = elist.replace(/\.[^.]+\.[^.]+$/, "")
            }
            d = "<a href='list.html?" + elist2 + "'><label class='label label-warning' style='width: 150px;'>" + elist + "</label></a> &nbsp;"
            if (eml.subject.length > 75) {
                eml.subject = eml.subject.substr(0, 75) + "..."
            }
        }
        // Get date and format it to YYYY-MM-DD HH:mm
        mdate = formatEpochUTC(eml.epoch)
        
        // format subject and from to weed out <> tags and <foo@bar.tld> addresses
        var subject = eml.subject.replace(/</mg, "&lt;")
        var from = eml.from.replace(/<.*>/, "").length > 0 ? eml.from.replace(/<.*>/, "") : eml.from.replace(/[<>]+/g, "")
        from = from.replace(/\"/g, "")
        
        // style based on view before or not??
        var estyle = ""
        if (localStorageAvailable) {
            if (! window.localStorage.getItem("viewed_" + eml.id) ){
                estyle = "font-weight: bold;"
            }
        }
        var at = ""
        // Do we have anything attached to this email? If so, show the attachment icon
        if (eml.attachments && eml.attachments > 0) {
            at = "<img src='images/attachment.png' title='" + eml.attachments + " file(s) attached' style='float: left; title='This email has attachments'/> "
        }
        // Compact theme: show a bit of email body as well
        if (prefs.theme && prefs.theme == 'compact') {
            var from = eml.from.replace(/<.*>/, "").length > 0 ? eml.from.replace(/<.*>/, "") : eml.from.replace(/[<>]+/g, "")
            from = "<span class='from_name'>" + from.replace(/\"/g, "") + "</span>"
            
            var sbody = (eml.body ? eml.body.replace(/</g, "&lt;") : "") + "&nbsp;"
            
            nest += "<li class='list-group-item'>" +
                    
                    "<div style='min-height: 32px;'><div style='width: 190px; float: left; white-space:nowrap; text-overflow: ellipsis; overflow: hidden;'>" +
                    "<img src='https://secure.gravatar.com/avatar/" + eml.gravatar + ".jpg?s=32&r=g&d=mm'/>&nbsp;<b>" +
                    from +
                    "</b></div> " +
                    "<div style='width: calc(100% - 230px); white-space:nowrap; overflow: hidden;'>" +
                    d + "<a style='overflow:hidden;" + estyle + "' href='thread.html/" + (pm_config.shortLinks ? shortenID(eml.id) : eml.id)  + "' onclick='this.style=\"\"; loadEmails_flat(" + i + "); latestEmailInThread = 0; return false;'>" + subject +
                    "</div></a> <div style='float: right;position:absolute;right:4px;top:12px;';><a style='float: right; opacity: 0.75; margin-left: 2px; margin-top: -3px;' href='api/atom.lua?mid=" + eml.id + "'><img src='images/atom.png' title='Subscribe to this thread as an atom feed'/></a><label style='float: right; width: 110px;' class='label label-" + ld + "' title='" + ti + "'>" + mdate + "</label>" +
                    "</div><div style='width: calc(100% - 270px); color: #999; white-space:nowrap; text-overflow: ellipsis; overflow: hidden;'>" + sbody +
                    "</div></div>" + "<div id='thread_" + i + "' style='display:none';></div></li>"
        // Other themes: Just show the subject..
        } else {
            nest += "<li class='list-group-item'> " + at + " &nbsp; <a style='" + estyle + "' href='thread.html/" + (pm_config.shortLinks ? shortenID(eml.id) : eml.id) + "' onclick='this.style=\"\"; loadEmails_flat(" + i + "); return false;'>" + subject + "</a> <label style='float: left; width: 140px;' class='label label-info'>" + from + "</label><label style='float: right; width: 110px;' class='label label-" + ld + "' title='" + ti + "'>" + mdate + "</label><div id='thread_" + i + "' style='display:none';></div></li>"
        }
    }
    nest += "</ul>"


    var bulk = document.getElementById('emails')
    bulk.innerHTML = ""
    
    // Top nav buttons
    var tnav = "<div style='float: left; width: 100%'>"
    if (start > 0) {
        var nstart = Math.max(0, start - limit)
        tnav += '<div style="width: 50%; float: left;"><a href="javascript:void(0);" style="float: left;" class="btn btn-success" onclick="loadList_flat(false, ' + d_ppp + ', ' + nstart + ');">Show previous ' + d_ppp + '</a> &nbsp </div>'
    } else {
        tnav += '<div style="width: 50%; float: left;">&nbsp;</div>'
    }
    var remain
    if (json.length > (start + limit)) {
        remain = Math.min(d_ppp, json.length - (start + limit))
        tnav += '<div style="width: 50%; float: left;"><a href="javascript:void(0);" style="float: right;" class="btn btn-success" onclick="loadList_flat(false, ' + d_ppp + ', ' + (start + d_ppp) + ');">Show next ' + remain + '</a></div>'
    }
    tnav += "</div><br/><br/>"
    
    // Emails
    bulk.innerHTML += tnav + nest
    if (prefs.hideStats == 'yes') {
        bulk.parentNode.setAttribute("class", "well col-md-10 col-lg-10")
    } else {
        bulk.parentNode.setAttribute("class", "well col-md-10 col-lg-7")
    }


    // Bottom nav buttons
    if (start > 0) {
        var nstart = Math.max(0, start - limit)
        bulk.innerHTML += '<div style="width: 33%; float: left;"><a href="javascript:void(0);" style="float: left;" class="btn btn-success" onclick="loadList_flat(false, ' + d_ppp + ', ' + nstart + ');">Show previous ' + d_ppp + '</a> &nbsp </div>'
    } else {
        bulk.innerHTML += '<div style="width: 33%; float: left;">&nbsp;</div>'
    }
    
    // subscribe button
    var sublist = xlist.replace(/@/, "-subscribe@")
    var innerbuttons = '<a href="mailto:' + sublist + '" title="Click to subscribe to this list" style="margin: 0 auto" class="btn btn-primary">Subscribe</a>'

    var unsublist = xlist.replace(/@/, "-unsubscribe@")
    innerbuttons += ' &nbsp; <a href="mailto:' + unsublist + '" title="Click to unsubscribe from this list" style="margin: 0 auto" class="btn btn-primary">Unsubscribe</a>'

    if (login && login.credentials) {
        innerbuttons += ' &nbsp; <a href="javascript:void(0);" style="margin: 0 auto" class="btn btn-danger" onclick="compose(null, \'' + xlist + '\');">Start a new thread</a>'
    }
    // Favorite or forget
    if (login && login.credentials && xlist) {
        var found = false
        for (var i in (login.favorites || [])) {
            if (login.favorites[i] == xlist) {
                found = true
                break
            }
        }
        innerbuttons += '<span id="favbtn">'
        if (found) {
            innerbuttons += ' &nbsp; <a href="javascript:void(0);" style="margin: 0 auto" class="btn btn-default" onclick="favorite(false, \'' + xlist + '\');">Remove from favorites</a>'
        } else {
            innerbuttons += ' &nbsp; <a href="javascript:void(0);" style="margin: 0 auto" class="btn btn-info" onclick="favorite(true, \'' + xlist + '\');">Add list to favorites</a>'
        }
        innerbuttons += '</span>'
    }
    
    bulk.innerHTML += '<div style="width: 33%; float: left;">' + innerbuttons + '</div>'
    
    if (json.length > (start + limit)) {
        remain = Math.min(d_ppp, json.length - (start + limit))
        bulk.innerHTML += '<div style="width: 33%; float: left;"><a href="javascript:void(0);" style="float: right;" class="btn btn-success" onclick="loadList_flat(false, ' + d_ppp + ', ' + (start + d_ppp) + ');">Show next ' + remain + '</a></div>'
    }
}


// loadEmails_flat: Load a topic in a flat display
function loadEmails_flat(id, close, treeview) {
    var lvid = id
    if (treeview) {
        lvid = treeview
    }
    var thread = document.getElementById('thread_' + lvid)
    if (thread) {
        current_thread = lvid
        thread.style.display = (thread.style.display != 'block') ? 'block' : 'none';
        if (close == true) {
            thread.style.display = 'none'
        }
        if (thread.style.display == 'none') {
            return
        }
        if (!open_emails[lvid]) {
            open_emails[lvid] = true

        }
        var cfid
        if (treeview) {
            cfid = id
        } else {
            cfid = current_flat_json[id].id
        }
        var eml = saved_emails[cfid]
        
        if (!eml || !eml.from) {
            GetAsync("/api/email.lua?id=" + cfid, lvid, displayEmail)
        } else {
            displayEmail(eml, lvid)
        }
    } else {
        alert("no such thread ID: " + lvid)
    }
}