<?php
require_once __DIR__ . '/../../helpers.php';

/**
 * POST /api/tasks/team/update.php
 * Update an existing team task (change status, add notes).
 *
 * Body: { ID, Status?, Notes?, Channel? }
 * Returns: { OK: true }
 */

$data = readJsonBody();

$id     = (int) ($data['ID'] ?? 0);
$status = trim($data['Status'] ?? '');
$notes  = $data['Notes'] ?? null;
$channel = $data['Channel'] ?? null;

if ($id <= 0) {
    http_response_code(400);
    apiAbort(['OK' => false, 'ERROR' => 'ID is required']);
}

// Validate status if provided
$validStatuses = ['active', 'paused', 'done', 'cancelled'];
if ($status !== '' && !in_array($status, $validStatuses, true)) {
    http_response_code(400);
    apiAbort(['OK' => false, 'ERROR' => 'Status must be one of: ' . implode(', ', $validStatuses)]);
}

try {
    // Verify task exists
    $task = queryOne("SELECT ID, Status FROM TeamTasks WHERE ID = ?", [$id]);
    if (!$task) {
        http_response_code(404);
        apiAbort(['OK' => false, 'ERROR' => 'Task not found']);
    }

    // Build dynamic update
    $sets = [];
    $params = [];

    if ($status !== '') {
        $sets[] = "Status = ?";
        $params[] = $status;

        // Auto-set timestamp columns based on status transitions
        if ($status === 'paused') {
            $sets[] = "PausedOn = NOW()";
        } elseif ($status === 'done' || $status === 'cancelled') {
            $sets[] = "CompletedOn = NOW()";
        } elseif ($status === 'active' && $task['Status'] === 'paused') {
            // Resuming from pause — clear PausedOn
            $sets[] = "PausedOn = NULL";
        }
    }

    if ($notes !== null) {
        $sets[] = "Notes = ?";
        $params[] = trim($notes);
    }

    if ($channel !== null) {
        $sets[] = "Channel = ?";
        $params[] = trim($channel);
    }

    if (empty($sets)) {
        http_response_code(400);
        apiAbort(['OK' => false, 'ERROR' => 'Nothing to update — provide Status, Notes, or Channel']);
    }

    $params[] = $id;
    queryTimed("UPDATE TeamTasks SET " . implode(', ', $sets) . " WHERE ID = ?", $params);

    jsonResponse(['OK' => true]);
} catch (Throwable $e) {
    http_response_code(500);
    apiAbort(['OK' => false, 'ERROR' => 'Failed to update task: ' . $e->getMessage()]);
}