<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

global $userId;

$data = readJsonBody();
$grantID = (int) ($data['GrantID'] ?? 0);

if ($grantID <= 0) {
    apiAbort(['OK' => false, 'ERROR' => 'missing_grantid', 'MESSAGE' => 'GrantID is required.']);
}

if ($userId <= 0) {
    apiAbort(['OK' => false, 'ERROR' => 'not_authenticated']);
}

$qGrant = queryOne(
    "SELECT
        g.*,
        ob.Name AS OwnerBusinessName,
        gb.Name AS GuestBusinessName,
        sp.Name AS ServicePointName,
        sp.TypeID AS ServicePointTypeID,
        cu.FirstName AS CreatedByFirstName,
        cu.LastName AS CreatedByLastName,
        au.FirstName AS AcceptedByFirstName,
        au.LastName AS AcceptedByLastName
     FROM ServicePointGrants g
     JOIN Businesses ob ON ob.ID = g.OwnerBusinessID
     JOIN Businesses gb ON gb.ID = g.GuestBusinessID
     JOIN ServicePoints sp ON sp.ID = g.ServicePointID
     LEFT JOIN Users cu ON cu.ID = g.CreatedByUserID
     LEFT JOIN Users au ON au.ID = g.AcceptedByUserID
     WHERE g.ID = ?
     LIMIT 1",
    [$grantID]
);

if (!$qGrant) {
    apiAbort(['OK' => false, 'ERROR' => 'not_found', 'MESSAGE' => 'Grant not found.']);
}

// Load history
$historyRows = queryTimed(
    "SELECT h.*, u.FirstName, u.LastName
     FROM ServicePointGrantHistory h
     LEFT JOIN Users u ON u.ID = h.ActorUserID
     WHERE h.GrantID = ?
     ORDER BY h.CreatedOn DESC",
    [$grantID]
);

$history = [];
foreach ($historyRows as $row) {
    $history[] = [
        'ID' => (int) $row['ID'],
        'Action' => $row['Action'],
        'ActorUserID' => (int) $row['ActorUserID'],
        'ActorName' => trim(($row['FirstName'] ?? '') . ' ' . ($row['LastName'] ?? '')),
        'ActorBusinessID' => (int) $row['ActorBusinessID'],
        'PreviousData' => $row['PreviousData'] ?? '',
        'NewData' => $row['NewData'] ?? '',
        'CreatedOn' => $row['CreatedOn'],
    ];
}

$grant = [
    'GrantID' => (int) $qGrant['ID'],
    'UUID' => $qGrant['UUID'],
    'OwnerBusinessID' => (int) $qGrant['OwnerBusinessID'],
    'GuestBusinessID' => (int) $qGrant['GuestBusinessID'],
    'ServicePointID' => (int) $qGrant['ServicePointID'],
    'StatusID' => (int) $qGrant['StatusID'],
    'EconomicsType' => $qGrant['EconomicsType'],
    'EconomicsValue' => (float) $qGrant['EconomicsValue'],
    'EligibilityScope' => $qGrant['EligibilityScope'],
    'TimePolicyType' => $qGrant['TimePolicyType'],
    'TimePolicyData' => $qGrant['TimePolicyData'] ?? '',
    'CreatedOn' => $qGrant['CreatedOn'],
    'AcceptedOn' => $qGrant['AcceptedOn'] ?? '',
    'RevokedOn' => $qGrant['RevokedOn'] ?? '',
    'LastEditedOn' => $qGrant['LastEditedOn'],
    'OwnerBusinessName' => $qGrant['OwnerBusinessName'],
    'GuestBusinessName' => $qGrant['GuestBusinessName'],
    'ServicePointName' => $qGrant['ServicePointName'],
    'ServicePointTypeID' => (int) $qGrant['ServicePointTypeID'],
    'CreatedByName' => trim(($qGrant['CreatedByFirstName'] ?? '') . ' ' . ($qGrant['CreatedByLastName'] ?? '')),
    'AcceptedByName' => trim(($qGrant['AcceptedByFirstName'] ?? '') . ' ' . ($qGrant['AcceptedByLastName'] ?? '')),
];

jsonResponse([
    'OK' => true,
    'Grant' => $grant,
    'History' => $history,
]);