<?php

namespace App\Controllers;

use App\Models\ActivityLogModel;

class ActivityLog extends BaseController
{
    public function index()
    {
        if ($r = $this->requireRole('admin')) {
            return $r;
        }

        $logModel = new ActivityLogModel();
        $summary = $logModel->getActivitySummary();
        $availableActions = $logModel->getAvailableActions();

        $action = $this->request->getGet('action');
        if (is_array($action)) {
            $action = array_values(array_filter(array_map('trim', $action)));
        } else {
            $action = trim((string) $action);
        }

        $role = $this->request->getGet('role');
        if (is_array($role)) {
            $role = array_values(array_filter(array_map('trim', $role)));
        } else {
            $role = trim((string) $role);
        }

        $filters = [
            'action'    => $action,
            'role'      => $role,
            'date_from' => trim((string) $this->request->getGet('date_from')),
            'date_to'   => trim((string) $this->request->getGet('date_to')),
        ];

        return view('admin/activity_log', [
            'logs'    => $logModel->getFilteredLogs($filters),
            'filters' => $filters,
            'summary' => $summary,
            'availableActions' => $availableActions,
        ]);
    }
    
    public function analytics()
    {
        if ($r = $this->requireRole('admin')) {
            return $r;
        }

        $period = $this->request->getGet('period') ?? '7_days';
        $days = ($period === '30_days') ? 30 : 7;
        $dateFrom = date('Y-m-d', strtotime("-$days days"));

        $db = \Config\Database::connect();
        
        $summary = [
            'total_actions' => $db->table('activity_logs')->where('activity_at >=', $dateFrom)->countAllResults(),
            'by_action' => $db->table('activity_logs')->select('action, COUNT(id) as count')->where('activity_at >=', $dateFrom)->groupBy('action')->get()->getResultArray(),
            'by_role' => $db->table('activity_logs')->select('activity_user_type as actor_role, COUNT(id) as count')->where('activity_at >=', $dateFrom)->groupBy('activity_user_type')->get()->getResultArray(),
        ];

        $mostActive = $db->table('activity_logs al')
            ->select("CONCAT(COALESCE(u.first_name, ''), ' ', COALESCE(u.last_name, '')) as name, COUNT(al.id) as count")
            ->join('users u', 'u.id = al.activity_user_id', 'left')
            ->where('al.activity_at >=', $dateFrom)
            ->groupBy('al.activity_user_id')
            ->orderBy('count', 'DESC')
            ->limit(10)
            ->get()
            ->getResultArray();
            
        $summary['most_active_users'] = $mostActive;

        $actionLabels = array_column($summary['by_action'], 'action');
        $actionCounts = array_column($summary['by_action'], 'count');
        $typeLabels = array_column($summary['by_role'], 'actor_role');
        $typeCounts = array_column($summary['by_role'], 'count');
        
        $userLabels = array_map(function($user) { return trim((string) $user['name']) ?: 'System'; }, $mostActive);
        $userCounts = array_column($mostActive, 'count');

        $uniqueIPs = $db->table('activity_logs')->select('ip as ip, COUNT(id) as count')->where('activity_at >=', $dateFrom)->where('ip IS NOT NULL')->groupBy('ip')->orderBy('count', 'DESC')->get()->getResultArray();
        
        $criticalActions = $db->table('activity_logs al')
            ->select("al.activity_at as activity_at, CONCAT(COALESCE(u.first_name, ''), ' ', COALESCE(u.last_name, '')) AS actor_name, u.email AS actor_email, al.action, al.target_user_type as target_user_type, al.target_user_id as target_user_id, al.description")
            ->join('users u', 'u.id = al.activity_user_id', 'left')
            ->like('al.action', 'delete')
            ->orderBy('al.activity_at', 'DESC')
            ->limit(50)
            ->get()
            ->getResultArray();

        return view('admin/activity_analytics', [
            'period' => $period,
            'summary' => $summary,
            'uniqueIPs' => $uniqueIPs,
            'criticalActions' => $criticalActions,
            'actionLabels' => json_encode($actionLabels),
            'actionCounts' => json_encode($actionCounts),
            'typeLabels' => json_encode($typeLabels),
            'typeCounts' => json_encode($typeCounts),
            'userLabels' => json_encode($userLabels),
            'userCounts' => json_encode($userCounts)
        ]);
    }
}