<?php
namespace App\Controllers;

use App\Helpers\Response;
use App\Middleware\JwtAuthMiddleware;
use App\Middleware\RoleGuard;
use App\Models\Model;

/**
 * Class ReportController
 * Executive Dashboard & Daily KPI Report Controller
 *
 * @package App\Controllers
 */
class ReportController
{
    /**
     * GET /api/v1/reports/kpi - Get Daily Executive KPI
     */
    public function kpi(): void
    {
        $user = JwtAuthMiddleware::handle();
        RoleGuard::check(['Admin', 'Manager']);

        $date = $_GET['date'] ?? date('Y-m-d');
        $branchId = isset($_GET['branch_id']) ? (int)$_GET['branch_id'] : $user['branch'];

        $db = Model::getDB();
        $stmt = $db->prepare("CALL sp_generate_daily_kpi(:pdate, :pbranch)");
        $stmt->execute(['pdate' => $date, 'pbranch' => $branchId]);
        $kpi = $stmt->fetch();
        $stmt->closeCursor();

        // ดึงสถิติภาระงานหมอนวดทั้งหมดจาก View
        $workloadStmt = $db->prepare("SELECT * FROM vw_therapist_workload_summary WHERE branch_id = :bid ORDER BY completed_queues_today DESC");
        $workloadStmt->execute(['bid' => $branchId]);
        $therapistWorkloads = $workloadStmt->fetchAll();

        Response::success('รายงานสรุปผลงานและ KPI ประจำวัน', [
            'date' => $date,
            'branch_id' => $branchId,
            'kpi_summary' => $kpi,
            'therapist_workloads' => $therapistWorkloads,
        ]);
    }

    /**
     * GET /api/v1/reports/export - Export Revenue and Queue Report as CSV / Excel
     */
    public function export(): void
    {
        JwtAuthMiddleware::handle();
        RoleGuard::check(['Admin', 'Manager']);

        $date = $_GET['date'] ?? date('Y-m-d');
        $db = Model::getDB();
        
        $stmt = $db->prepare("SELECT q.queue_no, q.queue_date, p.hn, CONCAT(p.first_name_th, ' ', p.last_name_th) AS patient,
                                     s.name_th AS service, CONCAT(u.first_name, ' ', u.last_name) AS therapist,
                                     q.status, q.wait_time_mins, q.service_time_mins, pm.net_amount
                              FROM queues q
                              JOIN patients p ON q.patient_id = p.id
                              JOIN services s ON q.service_id = s.id
                              LEFT JOIN therapists t ON q.therapist_id = t.id
                              LEFT JOIN users u ON t.user_id = u.id
                              LEFT JOIN payments pm ON pm.queue_id = q.id
                              WHERE q.queue_date = :dt
                              ORDER BY q.id ASC");
        $stmt->execute(['dt' => $date]);
        $rows = $stmt->fetchAll();

        header('Content-Type: text/csv; charset=UTF-8');
        header("Content-Disposition: attachment; filename=TTMQMS_Report_{$date}.csv");

        $out = fopen('php://output', 'w');
        // BOM for UTF-8 in Excel
        fputs($out, "\xEF\xBB\xBF");
        fputcsv($out, ['ลำดับคิว', 'วันที่', 'HN', 'ผู้รับบริการ', 'รายการนวด', 'หมอนวด', 'สถานะ', 'เวลารอ (นาที)', 'เวลาบริการ (นาที)', 'รายได้สุทธิ (บาท)']);

        foreach ($rows as $row) {
            fputcsv($out, [
                $row['queue_no'], $row['queue_date'], $row['hn'], $row['patient'],
                $row['service'], $row['therapist'], $row['status'], $row['wait_time_mins'],
                $row['service_time_mins'], $row['net_amount']
            ]);
        }
        fclose($out);
        exit();
    }
}