<?php

namespace App\Controllers\Admin;

use App\Controllers\Controller;
use App\Core\Request;
use App\Core\Response;
use App\Services\Database\Connection;
use PDO;

class DashboardController extends Controller
{
    private PDO $pdo;

    public function __construct(Connection $connection)
    {
        parent::__construct();
        $this->pdo = $connection->getPdo();
    }

    public function index(Request $request, Response $response): string
    {
        // Real stats from database
        $orgCount = (int)$this->pdo->query("SELECT COUNT(*) FROM organizations WHERE deleted_at IS NULL")->fetchColumn();
        $vcCount = (int)$this->pdo->query("SELECT COUNT(*) FROM organizations WHERE type='vc' AND deleted_at IS NULL")->fetchColumn();
        $acceleratorCount = (int)$this->pdo->query("SELECT COUNT(*) FROM organizations WHERE type='accelerator' AND deleted_at IS NULL")->fetchColumn();
        $opportunityCount = (int)$this->pdo->query("SELECT COUNT(*) FROM opportunities WHERE deleted_at IS NULL AND status='active'")->fetchColumn();
        $contactCount = (int)$this->pdo->query("SELECT COUNT(*) FROM contacts WHERE deleted_at IS NULL")->fetchColumn();
        $sourceCount = (int)$this->pdo->query("SELECT COUNT(*) FROM sources WHERE status='active'")->fetchColumn();
        $todayOpps = (int)$this->pdo->query("SELECT COUNT(*) FROM opportunities WHERE DATE(created_at) = CURDATE()")->fetchColumn();
        $todayContacts = (int)$this->pdo->query("SELECT COUNT(*) FROM contacts WHERE DATE(created_at) = CURDATE() AND deleted_at IS NULL")->fetchColumn();
        $todayOrgs = (int)$this->pdo->query("SELECT COUNT(*) FROM organizations WHERE DATE(created_at) = CURDATE() AND deleted_at IS NULL")->fetchColumn();

        // Recent opportunities
        $stmt = $this->pdo->query(
            "SELECT o.*, org.name as org_name FROM opportunities o 
             LEFT JOIN organizations org ON org.id = o.organization_id 
             WHERE o.deleted_at IS NULL 
             ORDER BY o.created_at DESC LIMIT 10"
        );
        $recentOpps = $stmt->fetchAll() ?: [];

        // Opportunities by type
        $byType = $this->pdo->query(
            "SELECT type, COUNT(*) as count FROM opportunities WHERE deleted_at IS NULL GROUP BY type"
        )->fetchAll(PDO::FETCH_KEY_PAIR) ?: [];

        // Recent activity
        $stmt = $this->pdo->query("SELECT * FROM activity_logs ORDER BY created_at DESC LIMIT 10");
        $recentActivities = $stmt->fetchAll() ?: [];

        // 6-month growth data
        $months = [];
        $opportunityMonthly = [];
        $interactionMonthly = [];
        for ($i = 5; $i >= 0; $i--) {
            $date = new \DateTime("-$i months");
            $key = $date->format('Y-m');
            $name = $date->format('M');
            $months[$key] = $name;
            $opportunityMonthly[$key] = 0;
            $interactionMonthly[$key] = 0;
        }

        $oppsQuery = $this->pdo->query(
            "SELECT DATE_FORMAT(created_at, '%Y-%m') as month, COUNT(*) as count 
             FROM opportunities 
             WHERE deleted_at IS NULL AND created_at >= DATE_SUB(NOW(), INTERVAL 6 MONTH)
             GROUP BY month"
        )->fetchAll(PDO::FETCH_KEY_PAIR) ?: [];

        $interQuery = $this->pdo->query(
            "SELECT DATE_FORMAT(created_at, '%Y-%m') as month, COUNT(*) as count 
             FROM interactions 
             WHERE created_at >= DATE_SUB(NOW(), INTERVAL 6 MONTH)
             GROUP BY month"
        )->fetchAll(PDO::FETCH_KEY_PAIR) ?: [];

        foreach ($oppsQuery as $monthKey => $count) {
            if (isset($opportunityMonthly[$monthKey])) {
                $opportunityMonthly[$monthKey] = (int)$count;
            }
        }
        foreach ($interQuery as $monthKey => $count) {
            if (isset($interactionMonthly[$monthKey])) {
                $interactionMonthly[$monthKey] = (int)$count;
            }
        }

        return $this->render('admin/dashboard', [
            'stats' => [
                'organizations' => $orgCount,
                'vc' => $vcCount,
                'accelerators' => $acceleratorCount,
                'opportunities' => $opportunityCount,
                'contacts' => $contactCount,
                'sources' => $sourceCount,
                'today' => $todayOpps,
                'today_contacts' => $todayContacts,
                'today_orgs' => $todayOrgs,
            ],
            'recent_opportunities' => $recentOpps,
            'opportunities_by_type' => $byType,
            'recent_activities' => $recentActivities,
            'growth_labels' => array_values($months),
            'growth_opportunities' => array_values($opportunityMonthly),
            'growth_interactions' => array_values($interactionMonthly),
        ], 'admin');
    }
}