using Disco.Plugins.ADCompare.Features;
using Disco.Services.Plugins;
using Newtonsoft.Json;
using System;
using System.Linq;
using System.Text;
using System.Web.Mvc;

namespace Disco.Plugins.ADCompare.WebHandler
{
    public class ADCompareWebHandler : PluginWebHandler
    {
        public override ActionResult ExecuteAction(string ActionName)
        {
            switch (ActionName?.ToLower())
            {
                case null:
                case "":
                case "index":
                    return Index();
                case "compare":
                    return Compare();
                case "export":
                    return ExportCsv();
                default:
                    return new HttpNotFoundResult();
            }
        }

        private ActionResult Index()
        {
            return new ContentResult
            {
                Content = BuildDashboardHtml(),
                ContentType = "text/html",
                ContentEncoding = Encoding.UTF8
            };
        }

        private ActionResult Compare()
        {
            var service = new DeviceCompareService(Database);
            var summary = service.CompareAllDevices();
            return new ContentResult
            {
                Content = JsonConvert.SerializeObject(summary, Formatting.Indented),
                ContentType = "application/json",
                ContentEncoding = Encoding.UTF8
            };
        }

        private ActionResult ExportCsv()
        {
            var service = new DeviceCompareService(Database);
            var summary = service.CompareAllDevices();
            var sb = new StringBuilder();
            sb.AppendLine("SerialNumber,ComputerName,DiscoAssignedUser,DiscoAssignedUserName,ADManagedByUser,ADManagedByName,Match,Reason");
            foreach (var r in summary.Results.Where(r => !r.IsMatch))
            {
                sb.AppendLine(string.Join(",",
                    Csv(r.SerialNumber), Csv(r.ComputerName),
                    Csv(r.DiscoAssignedUserId), Csv(r.DiscoAssignedUserDisplayName),
                    Csv(r.ADManagedByUserId), Csv(r.ADManagedByDisplayName),
                    r.IsMatch.ToString(), Csv(r.MismatchReason)));
            }
            HostController.Response.Headers.Add("Content-Disposition",
                $"attachment; filename=\"AD_ManagedBy_Compare_{DateTime.Now:yyyyMMdd_HHmmss}.csv\"");
            return new ContentResult { Content = sb.ToString(), ContentType = "text/csv", ContentEncoding = Encoding.UTF8 };
        }

        private string Csv(string v) => $"\"{(v ?? "").Replace("\"", "\"\"")}\"";

        private string BuildDashboardHtml()
        {
            var pluginUrl = Url.Action(MVC.API.Disco.Plugin.PluginWebAction(Manifest.Id, null));
            return $@"
<div id='adcompare'>
    <h2><i class='fa fa-exchange'></i> AD Compare &mdash; Device Managed By</h2>
    <p>Compares the AD computer <strong>Managed By</strong> field against the Disco <strong>Assigned User</strong>.</p>
    <div style='margin:15px 0;'>
        <button id='btnRun' class='btn btn-primary' onclick='runCompare()'><i class='fa fa-refresh'></i> Run Comparison</button>
        <button id='btnExport' class='btn btn-default' onclick='location.href=""{pluginUrl}/Export""' style='margin-left:10px;' disabled><i class='fa fa-download'></i> Export Mismatches CSV</button>
        <span id='loading' style='display:none;margin-left:15px;'><i class='fa fa-spinner fa-spin'></i> Querying AD for all devices&hellip;</span>
    </div>
    <div id='summary' style='display:none;margin:15px 0;padding:15px;background:#f5f5f5;border-radius:4px;'>
        <div class='row'>
            <div class='col-md-2'><strong>Total Devices</strong><br/><span id='sTotal' style='font-size:24px;'>-</span></div>
            <div class='col-md-2 text-success'><strong>Matched</strong><br/><span id='sMatch' style='font-size:24px;'>-</span></div>
            <div class='col-md-2 text-warning'><strong>Mismatched</strong><br/><span id='sMismatch' style='font-size:24px;'>-</span></div>
            <div class='col-md-2 text-danger'><strong>Not in AD</strong><br/><span id='sNotAD' style='font-size:24px;'>-</span></div>
            <div class='col-md-2 text-info'><strong>No ManagedBy</strong><br/><span id='sNoMgr' style='font-size:24px;'>-</span></div>
            <div class='col-md-2 text-muted'><strong>No Assignment</strong><br/><span id='sNoAssign' style='font-size:24px;'>-</span></div>
        </div>
    </div>
    <div style='margin:10px 0;'>
        <label><input type='checkbox' id='chkMismatchOnly' checked onchange='renderTable()'> Show mismatches only</label>
        <input type='text' id='txtFilter' placeholder='Filter by serial, computer name, or user...' style='margin-left:15px;padding:4px 8px;width:350px;' oninput='renderTable()'>
    </div>
    <table id='tbl' class='table table-striped table-condensed' style='display:none;'>
        <thead><tr>
            <th></th><th>Serial Number</th><th>Computer Name</th>
            <th>Disco Assigned User</th><th>AD Managed By</th><th>Reason</th>
        </tr></thead>
        <tbody id='tbody'></tbody>
    </table>
</div>
<script>
var data=[];
function runCompare(){{
    $('#loading').show();$('#btnRun').prop('disabled',true);$('#tbl').hide();
    $.getJSON('{pluginUrl}/Compare',function(d){{
        data=d.Results;
        $('#sTotal').text(d.TotalDevices);$('#sMatch').text(d.DevicesMatched);
        $('#sMismatch').text(d.DevicesMismatched);$('#sNotAD').text(d.DevicesNotInAD);
        $('#sNoMgr').text(d.DevicesNoManagedBy);$('#sNoAssign').text(d.DevicesNoAssignment);
        $('#summary').show();$('#btnExport').prop('disabled',false);
        renderTable();$('#tbl').show();
    }}).fail(function(x){{alert('Error: '+x.statusText);}})
    .always(function(){{$('#loading').hide();$('#btnRun').prop('disabled',false);}});
}}
function renderTable(){{
    var mo=$('#chkMismatchOnly').is(':checked'),q=$('#txtFilter').val().toLowerCase(),tb=$('#tbody');tb.empty();
    data.forEach(function(r){{
        if(mo&&r.IsMatch)return;
        if(q){{var hay=(r.SerialNumber+' '+r.ComputerName+' '+r.DiscoAssignedUserId+' '+r.ADManagedByUserId+' '+(r.DiscoAssignedUserDisplayName||'')+' '+(r.ADManagedByDisplayName||'')).toLowerCase();if(hay.indexOf(q)<0)return;}}
        var icon=r.IsMatch?'<i class=""fa fa-check text-success""></i>':(!r.FoundInAD?'<i class=""fa fa-times text-danger""></i>':'<i class=""fa fa-exclamation-triangle text-warning""></i>');
        var discoUser=r.DiscoAssignedUserId?(esc(r.DiscoAssignedUserId)+(r.DiscoAssignedUserDisplayName?'<br/><small class=""text-muted"">'+esc(r.DiscoAssignedUserDisplayName)+'</small>':'')):'<em class=""text-muted"">Not assigned</em>';
        var adUser=r.ADManagedByUserId?(esc(r.ADManagedByUserId)+(r.ADManagedByDisplayName?'<br/><small class=""text-muted"">'+esc(r.ADManagedByDisplayName)+'</small>':'')):(r.FoundInAD?'<em class=""text-muted"">Empty</em>':'<em class=""text-muted"">N/A</em>');
        tb.append('<tr class=""'+(r.IsMatch?'':'warning')+'"">'+'<td>'+icon+'</td><td>'+esc(r.SerialNumber)+'</td><td>'+esc(r.ComputerName||'')+'</td><td>'+discoUser+'</td><td>'+adUser+'</td><td>'+esc(r.MismatchReason||'')+'</td></tr>');
    }});
}}
function esc(t){{if(!t)return'';var d=document.createElement('div');d.appendChild(document.createTextNode(t));return d.innerHTML;}}
</script>";
        }
    }
}