<?php

/**
 * @package     MokoSuiteCross
 * @subpackage  com_mokosuitecross
 * @author      Moko Consulting <hello@mokoconsulting.tech>
 * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
 * @license     GNU General Public License version 3 or later; see LICENSE
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

namespace Joomla\Component\MokoSuiteCross\Administrator\Helper;

defined('_JEXEC') or die;

use Joomla\CMS\Factory;

class AnalyticsHelper
{
    /**
     * Record or update engagement metrics for a post.
     */
    public static function recordEngagement(int $postId, int $serviceId, string $serviceType, array $metrics): bool
    {
        $db = Factory::getDbo();

        $postedAt = $metrics['posted_at'] ?? null;

        if ($postedAt) {
            $timestamp  = strtotime($postedAt);
            $dayOfWeek  = (int) date('w', $timestamp);
            $hourOfDay  = (int) date('G', $timestamp);
        } else {
            $dayOfWeek  = 0;
            $hourOfDay  = 0;
        }

        $impressions = (int) ($metrics['impressions'] ?? 0);
        $engagements = (int) ($metrics['engagements'] ?? 0);
        $clicks      = (int) ($metrics['clicks'] ?? 0);
        $shares      = (int) ($metrics['shares'] ?? 0);

        $engagementRate = $impressions > 0
            ? round(($engagements / $impressions) * 100, 2)
            : 0.00;

        $query = $db->getQuery(true)
            ->select($db->quoteName('id'))
            ->from($db->quoteName('#__mokosuitecross_analytics'))
            ->where($db->quoteName('post_id') . ' = ' . $postId)
            ->where($db->quoteName('service_id') . ' = ' . $serviceId);
        $db->setQuery($query);
        $existingId = $db->loadResult();

        if ($existingId) {
            $query = $db->getQuery(true)
                ->update($db->quoteName('#__mokosuitecross_analytics'))
                ->set($db->quoteName('impressions') . ' = ' . $impressions)
                ->set($db->quoteName('engagements') . ' = ' . $engagements)
                ->set($db->quoteName('clicks') . ' = ' . $clicks)
                ->set($db->quoteName('shares') . ' = ' . $shares)
                ->set($db->quoteName('engagement_rate') . ' = ' . $engagementRate)
                ->where($db->quoteName('id') . ' = ' . (int) $existingId);
            $db->setQuery($query);
            $db->execute();

            return true;
        }

        $record = (object) [
            'post_id'         => $postId,
            'service_id'      => $serviceId,
            'service_type'    => $serviceType,
            'posted_at'       => $postedAt,
            'day_of_week'     => $dayOfWeek,
            'hour_of_day'     => $hourOfDay,
            'impressions'     => $impressions,
            'engagements'     => $engagements,
            'clicks'          => $clicks,
            'shares'          => $shares,
            'engagement_rate' => $engagementRate,
            'created'         => Factory::getDate()->toSql(),
        ];

        $db->insertObject('#__mokosuitecross_analytics', $record);

        return true;
    }

    /**
     * Get heatmap data as a 7x24 grid derived from actual post success data.
     */
    public static function getHeatmapData(string $serviceType = '', int $days = 90): array
    {
        $db = Factory::getDbo();

        $query = $db->getQuery(true)
            ->select([
                'DAYOFWEEK(' . $db->quoteName('p.posted_at') . ') - 1 AS day_of_week',
                'HOUR(' . $db->quoteName('p.posted_at') . ') AS hour_of_day',
                'COUNT(*) AS post_count',
            ])
            ->from($db->quoteName('#__mokosuitecross_posts', 'p'))
            ->join('INNER', $db->quoteName('#__mokosuitecross_services', 's')
                . ' ON ' . $db->quoteName('s.id') . ' = ' . $db->quoteName('p.service_id'))
            ->where($db->quoteName('p.status') . ' = ' . $db->quote('posted'))
            ->where($db->quoteName('p.posted_at') . ' IS NOT NULL')
            ->group('day_of_week')
            ->group('hour_of_day')
            ->order('day_of_week ASC')
            ->order('hour_of_day ASC');

        if ($serviceType !== '') {
            $query->where($db->quoteName('s.service_type') . ' = ' . $db->quote($serviceType));
        }

        if ($days > 0) {
            $cutoff = Factory::getDate('-' . $days . ' days')->toSql();
            $query->where($db->quoteName('p.posted_at') . ' >= ' . $db->quote($cutoff));
        }

        $db->setQuery($query);
        $rows = $db->loadObjectList();

        $maxCount = 1;

        foreach ($rows as $row) {
            if ((int) $row->post_count > $maxCount) {
                $maxCount = (int) $row->post_count;
            }
        }

        $grid = [];

        for ($d = 0; $d < 7; $d++) {
            for ($h = 0; $h < 24; $h++) {
                $grid[$d][$h] = ['avg_rate' => 0.00, 'post_count' => 0];
            }
        }

        foreach ($rows as $row) {
            $count = (int) $row->post_count;
            $grid[(int) $row->day_of_week][(int) $row->hour_of_day] = [
                'avg_rate'   => round(($count / $maxCount) * 100, 2),
                'post_count' => $count,
            ];
        }

        return $grid;
    }

    /**
     * Get the best times to post ranked by post success frequency.
     */
    public static function getBestTimes(string $serviceType = '', int $limit = 5): array
    {
        $db = Factory::getDbo();

        $query = $db->getQuery(true)
            ->select([
                'DAYOFWEEK(' . $db->quoteName('p.posted_at') . ') - 1 AS day_of_week',
                'HOUR(' . $db->quoteName('p.posted_at') . ') AS hour_of_day',
                'COUNT(*) AS post_count',
            ])
            ->from($db->quoteName('#__mokosuitecross_posts', 'p'))
            ->join('INNER', $db->quoteName('#__mokosuitecross_services', 's')
                . ' ON ' . $db->quoteName('s.id') . ' = ' . $db->quoteName('p.service_id'))
            ->where($db->quoteName('p.status') . ' = ' . $db->quote('posted'))
            ->where($db->quoteName('p.posted_at') . ' IS NOT NULL')
            ->group('day_of_week')
            ->group('hour_of_day')
            ->having('COUNT(*) >= 1')
            ->order('post_count DESC');

        if ($serviceType !== '') {
            $query->where($db->quoteName('s.service_type') . ' = ' . $db->quote($serviceType));
        }

        $db->setQuery($query, 0, $limit);
        $rows = $db->loadAssocList();

        $dayNames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

        $results = [];

        foreach ($rows as $row) {
            $hour   = (int) $row['hour_of_day'];
            $ampm   = $hour < 12 ? 'AM' : 'PM';
            $hour12 = $hour % 12 ?: 12;

            $results[] = [
                'day_of_week' => (int) $row['day_of_week'],
                'day_name'    => $dayNames[(int) $row['day_of_week']],
                'hour_of_day' => $hour,
                'hour_label'  => $hour12 . ':00 ' . $ampm,
                'avg_rate'    => round((float) $row['post_count'], 2),
                'post_count'  => (int) $row['post_count'],
            ];
        }

        return $results;
    }

    /**
     * Get stats grouped by service type from actual post data.
     */
    public static function getServiceBreakdown(int $days = 30): array
    {
        $db = Factory::getDbo();

        $query = $db->getQuery(true)
            ->select([
                $db->quoteName('s.service_type'),
                'COUNT(*) AS total_posts',
                'SUM(CASE WHEN ' . $db->quoteName('p.status') . ' = ' . $db->quote('posted') . ' THEN 1 ELSE 0 END) AS total_succeeded',
                'SUM(CASE WHEN ' . $db->quoteName('p.status') . ' IN ('
                    . $db->quote('failed') . ',' . $db->quote('permanently_failed')
                    . ') THEN 1 ELSE 0 END) AS total_failed',
            ])
            ->from($db->quoteName('#__mokosuitecross_posts', 'p'))
            ->join('INNER', $db->quoteName('#__mokosuitecross_services', 's')
                . ' ON ' . $db->quoteName('s.id') . ' = ' . $db->quoteName('p.service_id'))
            ->group($db->quoteName('s.service_type'))
            ->order('total_posts DESC');

        if ($days > 0) {
            $cutoff = Factory::getDate('-' . $days . ' days')->toSql();
            $query->where($db->quoteName('p.created') . ' >= ' . $db->quote($cutoff));
        }

        $db->setQuery($query);
        $rows = $db->loadAssocList();

        foreach ($rows as &$row) {
            $total     = (int) $row['total_posts'];
            $succeeded = (int) $row['total_succeeded'];

            $row['total_posts']           = $total;
            $row['total_succeeded']       = $succeeded;
            $row['total_failed']          = (int) $row['total_failed'];
            $row['avg_engagement_rate']   = $total > 0 ? round(($succeeded / $total) * 100, 2) : 0;
            $row['total_impressions']     = 0;
            $row['total_engagements']     = 0;
            $row['total_clicks']          = 0;
            $row['total_shares']          = 0;
        }

        return $rows;
    }
}