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

/**
 * List tasks claimed by the current user
 * POST: { UserID: int, BusinessID?: int, FilterType?: "active"|"completed"|"today"|"week" }
 */

$data = readJsonBody();
$userID = (int) ($data['UserID'] ?? 0);
$businessID = (int) ($data['BusinessID'] ?? 0);
$filterType = strtolower(trim($data['FilterType'] ?? 'active'));

if ($userID <= 0) {
    apiAbort(['OK' => false, 'ERROR' => 'missing_params', 'MESSAGE' => 'UserID is required.']);
}

try {
    $where = "t.ClaimedByUserID = ?";
    $params = [$userID];

    if ($businessID > 0) {
        $where .= " AND t.BusinessID = ?";
        $params[] = $businessID;
    }

    switch ($filterType) {
        case 'active':
            $where .= " AND t.CompletedOn IS NULL";
            break;
        case 'completed':
            $where .= " AND t.CompletedOn IS NOT NULL";
            break;
        case 'today':
            $where .= " AND DATE(t.ClaimedOn) = CURDATE()";
            break;
        case 'week':
            $where .= " AND t.ClaimedOn >= DATE_SUB(CURDATE(), INTERVAL 7 DAY)";
            break;
    }

    $qTasks = queryTimed("
        SELECT
          t.ID, t.BusinessID, t.OrderID, t.TaskTypeID,
          t.Title, t.Details, t.CreatedOn, t.ClaimedByUserID,
          t.ClaimedOn, t.CompletedOn, t.UserID,
          tt.Name AS TaskTypeName, tt.Icon AS TaskTypeIcon, tt.Color AS TaskTypeColor,
          b.Name AS BusinessName,
          t.ServicePointID,
          sp.Name AS ServicePointName,
          u.FirstName AS CustomerFirstName,
          u.LastName AS CustomerLastName
        FROM Tasks t
        LEFT JOIN tt_TaskTypes tt ON tt.ID = t.TaskTypeID
        LEFT JOIN Businesses b ON b.ID = t.BusinessID
        LEFT JOIN Orders o ON o.ID = t.OrderID
        LEFT JOIN ServicePoints sp ON sp.ID = COALESCE(t.ServicePointID, o.ServicePointID)
        LEFT JOIN Users u ON u.ID = t.UserID
        WHERE $where
        ORDER BY t.ClaimedOn DESC
    ", $params);

    $tasks = [];
    foreach ($qTasks as $row) {
        $taskTitle = !empty(trim($row['Title'] ?? ''))
            ? $row['Title']
            : ((int) $row['OrderID'] > 0 ? "Order #" . $row['OrderID'] : "Task #" . $row['ID']);

        $customerName = '';
        if (!empty(trim($row['CustomerFirstName'] ?? ''))) {
            $customerName = $row['CustomerFirstName'];
            if (!empty(trim($row['CustomerLastName'] ?? ''))) {
                $customerName .= ' ' . $row['CustomerLastName'];
            }
        }

        $tasks[] = [
            'TaskID' => (int) $row['ID'],
            'BusinessID' => (int) $row['BusinessID'],
            'BusinessName' => $row['BusinessName'] ?? '',
            'TaskTypeID' => (int) $row['TaskTypeID'],
            'Title' => $taskTitle,
            'Details' => !empty(trim($row['Details'] ?? '')) ? $row['Details'] : '',
            'CreatedOn' => toISO8601($row['CreatedOn']),
            'ClaimedOn' => toISO8601($row['ClaimedOn'] ?? ''),
            'CompletedOn' => toISO8601($row['CompletedOn'] ?? ''),
            'StatusID' => empty(trim($row['CompletedOn'] ?? '')) ? 1 : 3,
            'SourceType' => 'order',
            'SourceID' => (int) $row['OrderID'],
            'TaskTypeName' => !empty(trim($row['TaskTypeName'] ?? '')) ? $row['TaskTypeName'] : '',
            'TaskTypeIcon' => !empty(trim($row['TaskTypeIcon'] ?? '')) ? $row['TaskTypeIcon'] : 'notifications',
            'TaskTypeColor' => !empty(trim($row['TaskTypeColor'] ?? '')) ? $row['TaskTypeColor'] : '#9C27B0',
            'ServicePointID' => (int) ($row['ServicePointID'] ?? 0),
            'ServicePointName' => $row['ServicePointName'] ?? '',
            'CustomerID' => (int) ($row['UserID'] ?? 0),
            'CustomerName' => $customerName,
            'OrderTotal' => 0,
        ];
    }

    // Calculate OrderTotal for tasks with linked orders
    foreach ($tasks as &$task) {
        if ((int) $task['SourceID'] > 0) {
            $qOT = queryOne("
                SELECT SUM(oli.Price * oli.Quantity) AS Subtotal, o.TipAmount, o.DeliveryFee, o.OrderTypeID, b.TaxRate, b.PayfritFee
                FROM Orders o
                INNER JOIN Businesses b ON b.ID = o.BusinessID
                LEFT JOIN OrderLineItems oli ON oli.OrderID = o.ID AND oli.IsDeleted = 0
                WHERE o.ID = ?
                GROUP BY o.ID
            ", [$task['SourceID']]);
            if ($qOT) {
                $sub = (float) $qOT['Subtotal'];
                $feeRate = (is_numeric($qOT['PayfritFee']) && (float) $qOT['PayfritFee'] > 0) ? (float) $qOT['PayfritFee'] : 0.05;
                $total = $sub + ($sub * (float) $qOT['TaxRate']) + (float) $qOT['TipAmount']
                    + (((int) $qOT['OrderTypeID'] === 3) ? (float) $qOT['DeliveryFee'] : 0)
                    + ($sub * $feeRate);
                $task['OrderTotal'] = number_format($total, 2, '.', '');
            }
        }
    }
    unset($task);

    jsonResponse([
        'OK' => true,
        'ERROR' => '',
        'TASKS' => $tasks,
        'COUNT' => count($tasks),
    ]);

} catch (Exception $e) {
    jsonResponse(['OK' => false, 'ERROR' => 'server_error', 'MESSAGE' => 'Error loading tasks', 'DETAIL' => $e->getMessage()]);
}