<?php

/**
 * orders_detail.php
 * --------------------------------------------------------------------------
 * Restituisce gli ordini dell'utente, ciascuno con:
 *   - dati ordine (numero, data, classe, scadenza, riprogrammazioni, ...)
 *   - conteggi calcolati lato server (totale, completate, perse, scadute,
 *     programmate, da confermare, da programmare)
 *   - elenco delle lezioni dell'ordine con stato "etichettato".
 *
 * Posizione: public/api/orders_detail.php
 * Metodo:    GET
 * Auth:      Bearer token (Sanctum)
 *
 * Regole stato (come concordato):
 *   - Scaduta   : expirylesson = 'Y'  (vince su persa)
 *   - Persa     : lostlesson   = 'Y'  (e non scaduta)
 *   - Completata: status='completed' OPPURE (status='booked' e data passata,
 *                 non persa, non scaduta)
 *   - Programmata: status='booked' e data futura (non persa/scaduta)
 *   - Da confermare: status='pending'
 *   - Da programmare: tickets - (tutte le precedenti) [0 se scaduto -> in scadute]
 * --------------------------------------------------------------------------
 */

require_once __DIR__ . '/_bootstrap.php';
$userId = (int) $user->id;

$now = new DateTime();
$today = $now->format('Y-m-d');

// ==========================================================================
// 1) Ordini dell'utente
// ==========================================================================
$stmt = $db->prepare("
    SELECT ob.idorderbook, ob.order_id, ob.idservice, ob.order_date_created,
           ob.quantityclass, ob.nticket, ob.first_lesson_date, ob.expireon,
           ob.maxreschedule, ob.reprogrammed,
           s.servicename, s.day, s.time
    FROM orderbook ob
    LEFT JOIN service s ON ob.idservice = s.idservice
    WHERE ob.iduser = :uid
    ORDER BY ob.idorderbook DESC
");
$stmt->execute([':uid' => $userId]);
$orderRows = $stmt->fetchAll();

// Prepared per le lezioni di un ordine
$lessonStmt = $db->prepare("
    SELECT bc.idbookingclass, bc.bookingstart, bc.status, bc.lostlesson,
           bc.expirylesson, bc.idservice,
           s.servicename
    FROM bookingclass bc
    LEFT JOIN service s ON bc.idservice = s.idservice
    WHERE bc.idorder = :oid AND bc.iduser = :uid
    ORDER BY bc.bookingstart ASC
");

$orders = [];

foreach ($orderRows as $o) {
    $orderId  = (int) $o['idorderbook'];
    // "tickets" totali: preferiamo quantityclass se presente, altrimenti nticket
    $tickets  = (int) ($o['quantityclass'] !== null && $o['quantityclass'] !== ''
        ? $o['quantityclass']
        : ($o['nticket'] ?? 0));
    $expireon = $o['expireon'] ?? null;
    $isExpired = ($expireon !== null && $expireon < $today);

    // Lezioni dell'ordine
    $lessonStmt->execute([':oid' => $orderId, ':uid' => $userId]);
    $lessonRows = $lessonStmt->fetchAll();

    $completed = 0;
    $lost = 0;
    $expired = 0;
    $booked = 0;
    $pending = 0;

    $lessons = [];
    foreach ($lessonRows as $l) {
        $status = (string) $l['status'];
        $lost_y = (($l['lostlesson'] ?? 'N') === 'Y');
        $exp_y  = (($l['expirylesson'] ?? 'N') === 'Y');

        $startRaw = $l['bookingstart'] ?? null;
        $isPast = false;
        $dateIso = null;
        if ($startRaw && $startRaw !== '0000-00-00 00:00:00') {
            try {
                $dt = new DateTime($startRaw);
                $isPast = ($dt < $now);
                $dateIso = $dt->format('Y-m-d H:i:s');
            } catch (Throwable $e) {
                $dateIso = null;
            }
        }

        // Etichetta stato (ordine di priorità come concordato)
        if ($exp_y) {
            $label = 'expired';
            $expired++;
        } elseif ($lost_y) {
            $label = 'lost';
            $lost++;
        } elseif ($status === 'pending') {
            $label = 'pending';
            $pending++;
        } elseif ($status === 'completed') {
            $label = 'completed';
            $completed++;
        } elseif ($status === 'booked') {
            if ($isPast) {
                $label = 'completed';
                $completed++;
            } else {
                $label = 'booked';
                $booked++;
            }
        } else {
            $label = $status !== '' ? $status : 'unknown';
        }

        $lessons[] = [
            'booking_id'      => (int) $l['idbookingclass'],
            'datetime'        => $dateIso,
            'class_name'      => (string) ($l['servicename'] ?? ''),
            'status'          => $label,
        ];
    }

    // Da programmare = tickets - (booked + completed + lost + expired + pending)
    $toSchedule = $tickets - ($booked + $completed + $lost + $expired + $pending);
    if ($toSchedule < 0) {
        $toSchedule = 0;
    }
    // Se l'ordine è scaduto, le "da programmare" diventano "scadute"
    if ($isExpired && $toSchedule > 0) {
        $expired += $toSchedule;
        $toSchedule = 0;
    }

    $orders[] = [
        'order_id'         => $orderId,
        'order_number'     => $o['order_id'] !== null ? (int) $o['order_id'] : null,
        'service_id'       => (int) $o['idservice'],
        'service_name'     => (string) ($o['servicename'] ?? ''),
        'day'              => (string) ($o['day'] ?? ''),
        'time'             => (string) ($o['time'] ?? ''),
        'order_date'       => $o['order_date_created'] ?? null,
        'first_lesson_date' => $o['first_lesson_date'] ?? null,
        'expire_on'        => $expireon,
        'is_expired'       => $isExpired,
        'max_reschedule'   => (int) ($o['maxreschedule'] ?? 0),
        'reprogrammed'     => (int) ($o['reprogrammed'] ?? 0),
        'tickets'          => $tickets,
        'summary'          => [
            'total'       => $tickets,
            'completed'   => $completed,
            'lost'        => $lost,
            'expired'     => $expired,
            'booked'      => $booked,
            'pending'     => $pending,
            'to_schedule' => $toSchedule,
        ],
        'lessons'          => $lessons,
    ];
}

echo json_encode([
    'success' => true,
    'orders'  => $orders,
], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);