#!/usr/local/cpanel/3rdparty/bin/perl
# gniza WHM Plugin — Dashboard
use strict;
use warnings;

use lib '/usr/local/cpanel/whostmgr/docroot/cgi/gniza-whm/lib';

use Whostmgr::HTMLInterface ();
use Cpanel::Form            ();
use GnizaWHM::Config;
use GnizaWHM::Cron;
use GnizaWHM::Runner;
use GnizaWHM::UI;

my $form = Cpanel::Form::parseform();

# Redirect to setup wizard if gniza is not configured
unless (GnizaWHM::UI::is_configured()) {
    if (($form->{'action'} // '') eq 'status') {
        print "Content-Type: application/json\r\n\r\n";
        print '{"running":false,"pid":"","log_file":"","lines":[]}';
        exit;
    }
    print "Status: 302 Found\r\n";
    print "Location: setup.cgi\r\n\r\n";
    exit;
}

# JSON status endpoint for AJAX polling
if (($form->{'action'} // '') eq 'status') {
    handle_status_json();
    exit;
}

# Refresh stats endpoint
if (($form->{'action'} // '') eq 'refresh_stats' && ($ENV{'REQUEST_METHOD'} // '') eq 'POST') {
    unless (GnizaWHM::UI::verify_csrf_token($form->{'gniza_csrf'} // '')) {
        GnizaWHM::UI::set_flash('error', 'Invalid or expired form token.');
        print "Status: 302 Found\r\n";
        print "Location: index.cgi\r\n\r\n";
        exit;
    }
    my ($ok, $stdout, $stderr) = GnizaWHM::Runner::run('stats', undef, [], {});
    if ($ok) {
        GnizaWHM::UI::set_flash('success', 'Statistics refreshed successfully.');
    } else {
        GnizaWHM::UI::set_flash('error', 'Failed to refresh statistics: ' . GnizaWHM::UI::esc($stderr));
    }
    print "Status: 302 Found\r\n";
    print "Location: index.cgi\r\n\r\n";
    exit;
}

print "Content-Type: text/html\r\n\r\n";

Whostmgr::HTMLInterface::defheader('GNIZA Backup Manager — Dashboard', '', '/cgi/gniza-whm/index.cgi');

print GnizaWHM::UI::page_header('GNIZA Backup Manager');
print GnizaWHM::UI::render_nav('index.cgi');
print GnizaWHM::UI::render_flash();

# Stats overview cards
{
    my $log_dir = '/var/log/gniza';
    my $main_conf_file = '/etc/gniza/gniza.conf';
    if (-f $main_conf_file) {
        my $cfg = GnizaWHM::Config::parse($main_conf_file, 'main');
        $log_dir = $cfg->{LOG_DIR} if $cfg->{LOG_DIR} && $cfg->{LOG_DIR} ne '';
    }

    my @cpanel_accounts = GnizaWHM::UI::get_cpanel_accounts();
    my @remotes = GnizaWHM::UI::list_remotes();
    my $schedules = GnizaWHM::Cron::get_current_schedules();
    my $sched_count = scalar keys %$schedules;

    # Read stats.json cache
    my $stats_file = "$log_dir/stats.json";
    my ($backed_up, $total_snaps, $last_status, $last_log, $updated) = (0, 0, '', '', '');
    my $has_stats = 0;

    if (-f $stats_file) {
        if (open my $fh, '<', $stats_file) {
            my $json = do { local $/; <$fh> };
            close $fh;
            $has_stats = 1;
            ($backed_up) = $json =~ /"backed_up_accounts"\s*:\s*(\d+)/;
            ($total_snaps) = $json =~ /"snapshots"\s*:\s*(\d+)/;
            ($last_status) = $json =~ /"status"\s*:\s*"([^"]*)"/;
            ($last_log) = $json =~ /"log"\s*:\s*"([^"]*)"/;
            ($updated) = $json =~ /"updated"\s*:\s*"([^"]*)"/;
            $backed_up //= 0;
            $total_snaps //= 0;
            $last_status //= '';
            $last_log //= '';
            $updated //= '';
        }
    }

    # Updated timestamp + refresh button
    print qq{<div class="flex items-center gap-3 mb-4">\n};
    if ($has_stats && $updated) {
        my $esc_updated = GnizaWHM::UI::esc($updated);
        print qq{  <span class="text-sm text-base-content/60">Stats updated: $esc_updated</span>\n};
    } else {
        print qq{  <span class="text-sm text-base-content/60">No stats collected yet</span>\n};
    }
    print qq{  <form method="post" action="index.cgi" class="inline">\n};
    print qq{    <input type="hidden" name="action" value="refresh_stats">\n};
    print qq{    } . GnizaWHM::UI::csrf_hidden_field() . qq{\n};
    print qq{    <button type="submit" class="btn btn-secondary btn-sm">Refresh Stats</button>\n};
    print qq{  </form>\n};
    print qq{</div>\n};

    # 6 stat cards in responsive grid
    print qq{<div class="grid grid-cols-2 sm:grid-cols-3 gap-4 mb-6">\n};

    # Card 1: cPanel Accounts
    my $acct_count = scalar @cpanel_accounts;
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">cPanel Accounts</div>\n};
    print qq{    <div class="stat-value text-primary">$acct_count</div>\n};
    print qq{    <div class="stat-desc">on this server</div>\n};
    print qq{  </div>\n};

    # Card 2: Backed Up Accounts
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">Backed Up Accounts</div>\n};
    print qq{    <div class="stat-value text-secondary">$backed_up</div>\n};
    my $remote_count_desc = scalar @remotes;
    print qq{    <div class="stat-desc">across $remote_count_desc remote(s)</div>\n};
    print qq{  </div>\n};

    # Card 3: Total Snapshots
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">Total Snapshots</div>\n};
    print qq{    <div class="stat-value">$total_snaps</div>\n};
    print qq{    <div class="stat-desc">across all remotes</div>\n};
    print qq{  </div>\n};

    # Card 4: Remotes
    my $rem_count = scalar @remotes;
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">Remotes</div>\n};
    print qq{    <div class="stat-value text-primary">$rem_count</div>\n};
    print qq{    <div class="stat-desc">configured destinations</div>\n};
    print qq{  </div>\n};

    # Card 5: Schedules
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">Schedules</div>\n};
    print qq{    <div class="stat-value text-secondary">$sched_count</div>\n};
    print qq{    <div class="stat-desc">active cron jobs</div>\n};
    print qq{  </div>\n};

    # Card 6: Last Backup
    my ($badge_class, $badge_text);
    if ($last_status eq 'SUCCESS') {
        $badge_class = 'badge-success';
        $badge_text = 'SUCCESS';
    } elsif ($last_status eq 'FAILURE') {
        $badge_class = 'badge-error';
        $badge_text = 'FAILURE';
    } else {
        $badge_class = 'badge-neutral';
        $badge_text = $has_stats ? 'UNKNOWN' : 'N/A';
    }
    print qq{  <div class="stat bg-white shadow-sm border border-base-300 rounded-box">\n};
    print qq{    <div class="stat-title">Last Backup</div>\n};
    print qq{    <div class="stat-value"><span class="badge $badge_class badge-lg">$badge_text</span></div>\n};
    if ($last_log) {
        my $esc_log = GnizaWHM::UI::esc($last_log);
        print qq{    <div class="stat-desc">$esc_log</div>\n};
    } else {
        print qq{    <div class="stat-desc">click Refresh to collect</div>\n};
    }
    print qq{  </div>\n};

    print qq{</div>\n};
}

# Live Status card
print qq{<div id="gniza-live-status" class="card bg-white shadow-sm border border-base-300 mb-6">\n<div class="card-body">\n};
print qq{<h2 class="card-title text-sm">Live Status</h2>\n};
print qq{<div id="gniza-status-content">\n};
print qq{  <div class="flex items-center gap-2">\n};
print qq{    <span class="loading loading-spinner loading-xs"></span>\n};
print qq{    <span class="text-sm text-base-content/60">Checking...</span>\n};
print qq{  </div>\n};
print qq{</div>\n};
print qq{</div>\n</div>\n};

# Quick links
print qq{<div class="flex gap-3 mb-5">\n};
print qq{  <button type="button" class="btn btn-primary btn-sm" onclick="location.href='setup.cgi'">Run Setup Wizard</button>\n};
print qq{</div>\n};

# Remote destinations
my @remotes = GnizaWHM::UI::list_remotes();
print qq{<div class="card bg-white shadow-sm border border-base-300 mb-6">\n<div class="card-body">\n};
print qq{<div class="flex items-center gap-3"><h2 class="card-title text-sm">Configured Remotes</h2><button type="button" class="btn btn-primary btn-sm" onclick="location.href='remotes.cgi?action=add_form'">Add New</button></div>\n};
if (@remotes) {
    print qq{<div class="overflow-x-auto rounded-box border border-base-content/5 bg-base-100"><table class="table">\n};
    print qq{<thead><tr><th>Name</th><th>Host</th><th>Port</th><th>Retention</th></tr></thead>\n};
    print qq{<tbody>\n};
    for my $name (@remotes) {
        my $conf = GnizaWHM::Config::parse(GnizaWHM::UI::remote_conf_path($name), 'remote');
        my $host      = GnizaWHM::UI::esc($conf->{REMOTE_HOST} // '');
        my $port      = GnizaWHM::UI::esc($conf->{REMOTE_PORT} // '22');
        my $retention = GnizaWHM::UI::esc($conf->{RETENTION_COUNT} // '30');
        my $esc_name  = GnizaWHM::UI::esc($name);
        print qq{<tr class="hover"><td>$esc_name</td><td>$host</td><td>$port</td><td>$retention</td></tr>\n};
    }
    print qq{</tbody>\n</table></div>\n};
} else {
    print qq{<p>No remotes configured. <a href="setup.cgi" class="link">Run the setup wizard</a> to add one.</p>\n};
}
print qq{</div>\n</div>\n};

# Active schedules
my $schedules = GnizaWHM::Cron::get_current_schedules();
print qq{<div class="card bg-white shadow-sm border border-base-300 mb-6">\n<div class="card-body">\n};
print qq{<div class="flex items-center gap-3"><h2 class="card-title text-sm">Active Cron Schedules</h2><button type="button" class="btn btn-primary btn-sm" onclick="location.href='schedules.cgi?action=add_form'">Add New</button></div>\n};
if (keys %$schedules) {
    print qq{<div class="overflow-x-auto rounded-box border border-base-content/5 bg-base-100"><table class="table">\n};
    print qq{<thead><tr><th>Schedule</th><th>Timing</th><th>Remote Destination(s)</th></tr></thead>\n};
    print qq{<tbody>\n};
    for my $name (sort keys %$schedules) {
        my $esc_name = GnizaWHM::UI::esc($name);
        my ($timing, $remotes) = GnizaWHM::Cron::cron_to_human($schedules->{$name});
        my $esc_timing  = GnizaWHM::UI::esc($timing);
        my $esc_remotes = GnizaWHM::UI::esc($remotes);
        print qq{<tr class="hover"><td>$esc_name</td><td>$esc_timing</td><td>$esc_remotes</td></tr>\n};
    }
    print qq{</tbody>\n</table></div>\n};
} else {
    print qq{<p>No active gniza cron entries.</p>\n};
}
print qq{</div>\n</div>\n};

# Overview
my $version = GnizaWHM::UI::get_gniza_version();
print qq{<div class="card bg-white shadow-sm border border-base-300 mb-6">\n<div class="card-body">\n};
print qq{<h2 class="card-title text-sm">Overview</h2>\n};
print qq{<div class="overflow-x-auto rounded-box border border-base-content/5 bg-base-100"><table class="table">\n};
print qq{<tr><td class="font-semibold w-44">gniza version</td><td>} . GnizaWHM::UI::esc($version) . qq{</td></tr>\n};
print qq{</table></div>\n};
print qq{</div>\n</div>\n};

# Inline JavaScript for live status polling
print qq{<script>
(function() {
    var interval = null;
    var wasRunning = false;
    var el = document.getElementById('gniza-status-content');

    function escHtml(s) {
        var d = document.createElement('div');
        d.appendChild(document.createTextNode(s));
        return d.innerHTML;
    }

    function levelColor(level) {
        if (level === 'ERROR') return 'text-error';
        if (level === 'WARN')  return 'text-warning';
        if (level === 'DEBUG') return 'text-base-content/60';
        return '';
    }

    function update(data) {
        var html = '';
        if (data.running) {
            html += '<div class="flex items-center gap-2 mb-3">';
            html += '<span class="badge badge-warning badge-sm animate-pulse">Running</span>';
            html += '<span class="text-sm">PID ' + escHtml(data.pid);
            if (data.log_file) html += ' &mdash; ' + escHtml(data.log_file);
            html += '</span></div>';
            if (data.lines && data.lines.length) {
                html += '<pre class="font-mono text-xs bg-base-200 rounded-lg p-3 overflow-x-auto whitespace-pre-wrap max-h-48 overflow-y-auto">';
                for (var i = 0; i < data.lines.length; i++) {
                    var cls = levelColor(data.lines[i].level);
                    html += '<span class="' + cls + '">' + escHtml(data.lines[i].text) + '</span>\\n';
                }
                html += '</pre>';
            }
        } else {
            html += '<div class="flex items-center gap-2">';
            html += '<span class="badge badge-success badge-sm">Idle</span>';
            html += '<span class="text-sm">No backup or restore running.</span>';
            html += '</div>';
        }
        el.innerHTML = html;

        if (data.running !== wasRunning) {
            clearInterval(interval);
            interval = setInterval(poll, data.running ? 10000 : 60000);
            wasRunning = data.running;
        }
    }

    function poll() {
        fetch('index.cgi?action=status')
            .then(function(r) { return r.json(); })
            .then(update)
            .catch(function() {});
    }

    interval = setInterval(poll, 10000);
    poll();
})();
</script>
};

print GnizaWHM::UI::page_footer();
Whostmgr::HTMLInterface::footer();

# --- JSON status endpoint ---
sub handle_status_json {
    print "Content-Type: application/json\r\n\r\n";

    my $lock_file = '/var/run/gniza.lock';
    my $running = 0;
    my $pid = '';

    # Check lock file for running PID
    if (-f $lock_file) {
        if (open my $fh, '<', $lock_file) {
            $pid = <$fh> // '';
            chomp $pid;
            close $fh;
            if ($pid =~ /^\d+$/ && kill(0, $pid)) {
                $running = 1;
            } else {
                $pid = '';
            }
        }
    }

    # Find LOG_DIR from main config
    my $log_dir = '/var/log/gniza';
    my $main_conf_file = '/etc/gniza/gniza.conf';
    if (-f $main_conf_file) {
        my $cfg = GnizaWHM::Config::parse($main_conf_file, 'main');
        $log_dir = $cfg->{LOG_DIR} if $cfg->{LOG_DIR} && $cfg->{LOG_DIR} ne '';
    }

    # Find most recent gniza-*.log by mtime
    my $log_file = '';
    my @lines;
    if (opendir my $dh, $log_dir) {
        my @logs = sort {
            (stat("$log_dir/$b"))[9] <=> (stat("$log_dir/$a"))[9]
        } grep { /^gniza-\d{8}-\d{6}\.log$/ } readdir($dh);
        closedir $dh;
        $log_file = $logs[0] // '';
    }

    # Read last 15 lines if running and log exists
    if ($log_file && $running) {
        my $path = "$log_dir/$log_file";
        if (open my $fh, '<', $path) {
            my @all = <$fh>;
            close $fh;
            my $start = @all > 15 ? @all - 15 : 0;
            @lines = @all[$start .. $#all];
            chomp @lines;
        }
    }

    # Build JSON manually (no JSON module dependency)
    my $json = '{"running":' . ($running ? 'true' : 'false');
    $json .= ',"pid":"' . _json_esc($pid) . '"';
    $json .= ',"log_file":"' . _json_esc($log_file) . '"';
    $json .= ',"lines":[';
    my @json_lines;
    for my $line (@lines) {
        my $level = 'INFO';
        if ($line =~ /\]\s+\[(\w+)\]/) {
            $level = uc($1);
        }
        push @json_lines, '{"level":"' . _json_esc($level) . '","text":"' . _json_esc($line) . '"}';
    }
    $json .= join(',', @json_lines);
    $json .= ']}';

    print $json;
}

sub _json_esc {
    my ($s) = @_;
    $s //= '';
    $s =~ s/\\/\\\\/g;
    $s =~ s/"/\\"/g;
    $s =~ s/\n/\\n/g;
    $s =~ s/\r/\\r/g;
    $s =~ s/\t/\\t/g;
    # Escape control characters
    $s =~ s/([\x00-\x1f])/sprintf("\\u%04x", ord($1))/ge;
    return $s;
}